HG_REPOSITORIES/LPP/INSTRUMENTATION/SOLO_LFR/DEV_PLE Commit - r247:c33dcdaef462

Behaviour changed upon reception of a TC_LFR_ENTER_MODE with a transition...

paul -

r247:c33dcdaef462 R3a

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r247:c33dcdaef462

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src/tc_handler.c +3 -1

             /** Functions and tasks related to TeleCommand handling.
              *
              * @file
              * @author P. LEROY
              *
              * A group of functions to handle TeleCommands:\n
              * action launching\n
              * TC parsing\n
              * ...
              *
              */
             #include "tc_handler.h"
             #include "math.h"
             //***********
             // RTEMS TASK
             rtems_task actn_task( rtems_task_argument unused )
             {
                 /** This RTEMS task is responsible for launching actions upton the reception of valid TeleCommands.
                  *
                  * @param unused is the starting argument of the RTEMS task
                  *
                  * The ACTN task waits for data coming from an RTEMS msesage queue. When data arrives, it launches specific actions depending
                  * on the incoming TeleCommand.
                  *
                  */
                 int result;
                 rtems_status_code status;       // RTEMS status code
                 ccsdsTelecommandPacket_t TC;    // TC sent to the ACTN task
                 size_t size;                    // size of the incoming TC packet
                 unsigned char subtype;          // subtype of the current TC packet
                 unsigned char time[6];
                 rtems_id queue_rcv_id;
                 rtems_id queue_snd_id;
                 status =  get_message_queue_id_recv( &queue_rcv_id );
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in ACTN *** ERR get_message_queue_id_recv %d\n", status)
                 }
                 status =  get_message_queue_id_send( &queue_snd_id );
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in ACTN *** ERR get_message_queue_id_send %d\n", status)
                 }
                 result = LFR_SUCCESSFUL;
                 subtype = 0;          // subtype of the current TC packet
                 BOOT_PRINTF("in ACTN *** \n")
                         while(1)
                 {
                     status = rtems_message_queue_receive( queue_rcv_id, (char*) &TC, &size,
                                                           RTEMS_WAIT, RTEMS_NO_TIMEOUT);
                     getTime( time );    // set time to the current time
                     if (status!=RTEMS_SUCCESSFUL)
                     {
                         PRINTF1("ERR *** in task ACTN *** error receiving a message, code %d \n", status)
                     }
                     else
                     {
                         subtype = TC.serviceSubType;
                         switch(subtype)
                         {
                         case TC_SUBTYPE_RESET:
                             result = action_reset( &TC, queue_snd_id, time );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_LOAD_COMM:
                             result = action_load_common_par( &TC );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_LOAD_NORM:
                             result = action_load_normal_par( &TC, queue_snd_id, time );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_LOAD_BURST:
                             result = action_load_burst_par( &TC, queue_snd_id, time );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_LOAD_SBM1:
                             result = action_load_sbm1_par( &TC, queue_snd_id, time );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_LOAD_SBM2:
                             result = action_load_sbm2_par( &TC, queue_snd_id, time );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_DUMP:
                             result = action_dump_par( &TC,  queue_snd_id );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_ENTER:
                             result = action_enter_mode( &TC, queue_snd_id );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_UPDT_INFO:
                             result = action_update_info( &TC, queue_snd_id );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_EN_CAL:
                             result = action_enable_calibration( &TC, queue_snd_id, time );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_DIS_CAL:
                             result = action_disable_calibration( &TC, queue_snd_id, time );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_LOAD_K:
                             result = action_load_kcoefficients( &TC, queue_snd_id, time );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_DUMP_K:
                             result = action_dump_kcoefficients( &TC, queue_snd_id, time );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_LOAD_FBINS:
                             result = action_load_fbins_mask( &TC, queue_snd_id, time );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         case TC_SUBTYPE_UPDT_TIME:
                             result = action_update_time( &TC );
                             close_action( &TC, result, queue_snd_id );
                             break;
                         default:
                             break;
                         }
                     }
                 }
             }
             //***********
             // TC ACTIONS
             int action_reset(ccsdsTelecommandPacket_t *TC, rtems_id queue_id, unsigned char *time)
             {
                 /** This function executes specific actions when a TC_LFR_RESET TeleCommand has been received.
                  *
                  * @param TC points to the TeleCommand packet that is being processed
                  * @param queue_id is the id of the queue which handles TM transmission by the SpaceWire driver
                  *
                  */
                 PRINTF("this is the end!!!\n")
                         exit(0);
                 send_tm_lfr_tc_exe_not_implemented( TC, queue_id, time );
                 return LFR_DEFAULT;
             }
             int action_enter_mode(ccsdsTelecommandPacket_t *TC, rtems_id queue_id )
             {
                 /** This function executes specific actions when a TC_LFR_ENTER_MODE TeleCommand has been received.
                  *
                  * @param TC points to the TeleCommand packet that is being processed
                  * @param queue_id is the id of the queue which handles TM transmission by the SpaceWire driver
                  *
                  */
                 rtems_status_code status;
                 unsigned char requestedMode;
                 unsigned int *transitionCoarseTime_ptr;
                 unsigned int transitionCoarseTime;
                 unsigned char * bytePosPtr;
                 bytePosPtr = (unsigned char *) &TC->packetID;
                 requestedMode = bytePosPtr[ BYTE_POS_CP_MODE_LFR_SET ];
                 transitionCoarseTime_ptr = (unsigned int *) ( &bytePosPtr[ BYTE_POS_CP_LFR_ENTER_MODE_TIME ] );
                 transitionCoarseTime = (*transitionCoarseTime_ptr) & 0x7fffffff;
                 status = check_mode_value( requestedMode );
                 if ( status != LFR_SUCCESSFUL )     // the mode value is inconsistent
                 {
                     send_tm_lfr_tc_exe_inconsistent( TC, queue_id, BYTE_POS_CP_MODE_LFR_SET, requestedMode );
                 }
                 else                                // the mode value is valid, check the transition
                 {
                     status = check_mode_transition(requestedMode);
                     if (status != LFR_SUCCESSFUL)
                     {
                         PRINTF("ERR *** in action_enter_mode *** check_mode_transition\n")
                                 send_tm_lfr_tc_exe_not_executable( TC, queue_id );
                     }
                 }
                 if ( status == LFR_SUCCESSFUL )     // the transition is valid, check the date
                 {
                     status = check_transition_date( transitionCoarseTime );
                     if (status != LFR_SUCCESSFUL)
                     {
                         PRINTF("ERR *** in action_enter_mode *** check_transition_date\n")
                                 send_tm_lfr_tc_exe_inconsistent( TC, queue_id,
                                                                  BYTE_POS_CP_LFR_ENTER_MODE_TIME,
                                                                  bytePosPtr[ BYTE_POS_CP_LFR_ENTER_MODE_TIME + 3 ] );
                     }
                 }
                 if ( status == LFR_SUCCESSFUL )     // the date is valid, enter the mode
                 {
                     PRINTF1("OK  *** in action_enter_mode *** enter mode %d\n", requestedMode);
                     update_last_valid_transition_date( transitionCoarseTime );
                     switch(requestedMode)
                     {
                     case LFR_MODE_STANDBY:
                         status = enter_mode_standby();
                         break;
                     case LFR_MODE_NORMAL:
                         status = enter_mode_normal( transitionCoarseTime );
                         break;
                     case LFR_MODE_BURST:
                         status = enter_mode_burst( transitionCoarseTime );
                         break;
                     case LFR_MODE_SBM1:
                         status = enter_mode_sbm1( transitionCoarseTime );
                         break;
                     case LFR_MODE_SBM2:
                         status = enter_mode_sbm2( transitionCoarseTime );
                         break;
                     default:
                         break;
                     }
                 }
                 return status;
             }
             int action_update_info(ccsdsTelecommandPacket_t *TC, rtems_id queue_id)
             {
                 /** This function executes specific actions when a TC_LFR_UPDATE_INFO TeleCommand has been received.
                  *
                  * @param TC points to the TeleCommand packet that is being processed
                  * @param queue_id is the id of the queue which handles TM transmission by the SpaceWire driver
                  *
                  * @return LFR directive status code:
                  * - LFR_DEFAULT
                  * - LFR_SUCCESSFUL
                  *
                  */
                 unsigned int val;
                 int result;
                 unsigned int status;
                 unsigned char mode;
                 unsigned char * bytePosPtr;
                 bytePosPtr = (unsigned char *) &TC->packetID;
                 // check LFR mode
                 mode = (bytePosPtr[ BYTE_POS_UPDATE_INFO_PARAMETERS_SET5 ] & 0x1e) >> 1;
                 status = check_update_info_hk_lfr_mode( mode );
                 if (status == LFR_SUCCESSFUL)  // check TDS mode
                 {
                     mode = (bytePosPtr[ BYTE_POS_UPDATE_INFO_PARAMETERS_SET6 ] & 0xf0) >> 4;
                     status = check_update_info_hk_tds_mode( mode );
                 }
                 if (status == LFR_SUCCESSFUL)  // check THR mode
                 {
                     mode = (bytePosPtr[ BYTE_POS_UPDATE_INFO_PARAMETERS_SET6 ] & 0x0f);
                     status = check_update_info_hk_thr_mode( mode );
                 }
                 if (status == LFR_SUCCESSFUL)  // if the parameter check is successful
                 {
                     val = housekeeping_packet.hk_lfr_update_info_tc_cnt[0] * 256
                             + housekeeping_packet.hk_lfr_update_info_tc_cnt[1];
                     val++;
                     housekeeping_packet.hk_lfr_update_info_tc_cnt[0] = (unsigned char) (val >> 8);
                     housekeeping_packet.hk_lfr_update_info_tc_cnt[1] = (unsigned char) (val);
                 }
                 // pa_bia_status_info
                 // => pa_bia_mode_mux_set       3 bits
                 // => pa_bia_mode_hv_enabled    1 bit
                 // => pa_bia_mode_bias1_enabled 1 bit
                 // => pa_bia_mode_bias2_enabled 1 bit
                 // => pa_bia_mode_bias3_enabled 1 bit
                 // => pa_bia_on_off (cp_dpu_bias_on_off)
                 pa_bia_status_info = bytePosPtr[ BYTE_POS_UPDATE_INFO_PARAMETERS_SET2 ] & 0xfe; // [1111 1110]
                 pa_bia_status_info = pa_bia_status_info
                         | (bytePosPtr[ BYTE_POS_UPDATE_INFO_PARAMETERS_SET1 ] & 0x1);
                 result = status;
                 return result;
             }
             int action_enable_calibration(ccsdsTelecommandPacket_t *TC, rtems_id queue_id, unsigned char *time)
             {
                 /** This function executes specific actions when a TC_LFR_ENABLE_CALIBRATION TeleCommand has been received.
                  *
                  * @param TC points to the TeleCommand packet that is being processed
                  * @param queue_id is the id of the queue which handles TM transmission by the SpaceWire driver
                  *
                  */
                 int result;
                 result = LFR_DEFAULT;
                 setCalibration( true );
                 result = LFR_SUCCESSFUL;
                 return result;
             }
             int action_disable_calibration(ccsdsTelecommandPacket_t *TC, rtems_id queue_id, unsigned char *time)
             {
                 /** This function executes specific actions when a TC_LFR_DISABLE_CALIBRATION TeleCommand has been received.
                  *
                  * @param TC points to the TeleCommand packet that is being processed
                  * @param queue_id is the id of the queue which handles TM transmission by the SpaceWire driver
                  *
                  */
                 int result;
                 result = LFR_DEFAULT;
                 setCalibration( false );
                 result = LFR_SUCCESSFUL;
                 return result;
             }
             int action_update_time(ccsdsTelecommandPacket_t *TC)
             {
                 /** This function executes specific actions when a TC_LFR_UPDATE_TIME TeleCommand has been received.
                  *
                  * @param TC points to the TeleCommand packet that is being processed
                  * @param queue_id is the id of the queue which handles TM transmission by the SpaceWire driver
                  *
                  * @return LFR_SUCCESSFUL
                  *
                  */
                 unsigned int val;
                 time_management_regs->coarse_time_load = (TC->dataAndCRC[0] << 24)
                         + (TC->dataAndCRC[1] << 16)
                         + (TC->dataAndCRC[2] << 8)
                         + TC->dataAndCRC[3];
                 val = housekeeping_packet.hk_lfr_update_time_tc_cnt[0] * 256
                         + housekeeping_packet.hk_lfr_update_time_tc_cnt[1];
                 val++;
                 housekeeping_packet.hk_lfr_update_time_tc_cnt[0] = (unsigned char) (val >> 8);
                 housekeeping_packet.hk_lfr_update_time_tc_cnt[1] = (unsigned char) (val);
                 return LFR_SUCCESSFUL;
             }
             //*******************
             // ENTERING THE MODES
             int check_mode_value( unsigned char requestedMode )
             {
                 int status;
                 if ( (requestedMode != LFR_MODE_STANDBY)
                      && (requestedMode != LFR_MODE_NORMAL) && (requestedMode != LFR_MODE_BURST)
                      && (requestedMode != LFR_MODE_SBM1) && (requestedMode != LFR_MODE_SBM2) )
                 {
                     status = LFR_DEFAULT;
                 }
                 else
                 {
                     status = LFR_SUCCESSFUL;
                 }
                 return status;
             }
             int check_mode_transition( unsigned char requestedMode )
             {
                 /** This function checks the validity of the transition requested by the TC_LFR_ENTER_MODE.
                  *
                  * @param requestedMode is the mode requested by the TC_LFR_ENTER_MODE
                  *
                  * @return LFR directive status codes:
                  * - LFR_SUCCESSFUL - the transition is authorized
                  * - LFR_DEFAULT - the transition is not authorized
                  *
                  */
                 int status;
                 switch (requestedMode)
                 {
                 case LFR_MODE_STANDBY:
                     if ( lfrCurrentMode == LFR_MODE_STANDBY ) {
                         status = LFR_DEFAULT;
                     }
                     else
                     {
                         status = LFR_SUCCESSFUL;
                     }
                     break;
                 case LFR_MODE_NORMAL:
                     if ( lfrCurrentMode == LFR_MODE_NORMAL ) {
                         status = LFR_DEFAULT;
                     }
                     else {
                         status = LFR_SUCCESSFUL;
                     }
                     break;
                 case LFR_MODE_BURST:
                     if ( lfrCurrentMode == LFR_MODE_BURST ) {
                         status = LFR_DEFAULT;
                     }
                     else {
                         status = LFR_SUCCESSFUL;
                     }
                     break;
                 case LFR_MODE_SBM1:
                     if ( lfrCurrentMode == LFR_MODE_SBM1 ) {
                         status = LFR_DEFAULT;
                     }
                     else {
                         status = LFR_SUCCESSFUL;
                     }
                     break;
                 case LFR_MODE_SBM2:
                     if ( lfrCurrentMode == LFR_MODE_SBM2 ) {
                         status = LFR_DEFAULT;
                     }
                     else {
                         status = LFR_SUCCESSFUL;
                     }
                     break;
                 default:
                     status = LFR_DEFAULT;
                     break;
                 }
                 return status;
             }
             void update_last_valid_transition_date( unsigned int transitionCoarseTime )
             {
                 lastValidEnterModeTime = transitionCoarseTime;
             }
             int check_transition_date( unsigned int transitionCoarseTime )
             {
                 int status;
                 unsigned int localCoarseTime;
                 unsigned int deltaCoarseTime;
                 status = LFR_SUCCESSFUL;
                 if (transitionCoarseTime == 0)  // transition time = 0 means an instant transition
                 {
                     status = LFR_SUCCESSFUL;
                 }
                 else
                 {
                     localCoarseTime = time_management_regs->coarse_time & 0x7fffffff;
                     PRINTF2("localTime = %x, transitionTime = %x\n", localCoarseTime, transitionCoarseTime)
                             if ( transitionCoarseTime <= localCoarseTime )   // SSS-CP-EQS-322
                     {
                         status = LFR_DEFAULT;
                         PRINTF("ERR *** in check_transition_date *** transitionCoarseTime <= localCoarseTime\n")
                     }
                     if (status == LFR_SUCCESSFUL)
                     {
                         deltaCoarseTime = transitionCoarseTime - localCoarseTime;
                         if ( deltaCoarseTime > 3 )                  // SSS-CP-EQS-323
                         {
                             status = LFR_DEFAULT;
                             PRINTF1("ERR *** in check_transition_date *** deltaCoarseTime = %x\n", deltaCoarseTime)
                         }
                     }
                 }
                 return status;
             }
             int restart_asm_activities( unsigned char lfrRequestedMode )
             {
                 rtems_status_code status;
                 status = stop_spectral_matrices();
                 status = restart_asm_tasks( lfrRequestedMode );
                 launch_spectral_matrix();
                 return status;
             }
             int stop_spectral_matrices( void )
             {
                 /** This function stops and restarts the current mode average spectral matrices activities.
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_ALREADY_SUSPENDED - task already suspended
                  *
                  */
                 rtems_status_code status;
                 status = RTEMS_SUCCESSFUL;
                 // (1) mask interruptions
                 LEON_Mask_interrupt( IRQ_SPECTRAL_MATRIX );     // clear spectral matrix interrupt
                 // (2) reset spectral matrices registers
                 set_sm_irq_onNewMatrix( 0 );                    // stop the spectral matrices
                 reset_sm_status();
                 // (3) clear interruptions
                 LEON_Clear_interrupt( IRQ_SPECTRAL_MATRIX );    // clear spectral matrix interrupt
                 // suspend several tasks
                 if (lfrCurrentMode != LFR_MODE_STANDBY) {
                     status = suspend_asm_tasks();
                 }
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in stop_current_mode *** in suspend_science_tasks *** ERR code: %d\n", status)
                 }
                 return status;
             }
             int stop_current_mode( void )
             {
                 /** This function stops the current mode by masking interrupt lines and suspending science tasks.
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_ALREADY_SUSPENDED - task already suspended
                  *
                  */
                 rtems_status_code status;
                 status = RTEMS_SUCCESSFUL;
                 // (1) mask interruptions
                 LEON_Mask_interrupt( IRQ_WAVEFORM_PICKER );     // mask waveform picker interrupt
                 LEON_Mask_interrupt( IRQ_SPECTRAL_MATRIX );     // clear spectral matrix interrupt
                 // (2) reset waveform picker registers
                 reset_wfp_burst_enable();                       // reset burst and enable bits
                 reset_wfp_status();                             // reset all the status bits
                 // (3) reset spectral matrices registers
                 set_sm_irq_onNewMatrix( 0 );                    // stop the spectral matrices
                 reset_sm_status();
                 // reset lfr VHDL module
                 reset_lfr();
                 reset_extractSWF();                             // reset the extractSWF flag to false
                 // (4) clear interruptions
                 LEON_Clear_interrupt( IRQ_WAVEFORM_PICKER );    // clear waveform picker interrupt
                 LEON_Clear_interrupt( IRQ_SPECTRAL_MATRIX );    // clear spectral matrix interrupt
                 // suspend several tasks
                 if (lfrCurrentMode != LFR_MODE_STANDBY) {
                     status = suspend_science_tasks();
                 }
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in stop_current_mode *** in suspend_science_tasks *** ERR code: %d\n", status)
                 }
                 return status;
             }
             int enter_mode_standby()
             {
                 /** This function is used to put LFR in the STANDBY mode.
                  *
                  * @param transitionCoarseTime is the requested transition time contained in the TC_LFR_ENTER_MODE
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_INCORRECT_STATE - task never started
                  * - RTEMS_ILLEGAL_ON_REMOTE_OBJECT - cannot restart remote task
                  *
                  * The STANDBY mode does not depends on a specific transition date, the effect of the TC_LFR_ENTER_MODE
                  * is immediate.
                  *
                  */
                 int status;
                 status = stop_current_mode();       // STOP THE CURRENT MODE
             #ifdef PRINT_TASK_STATISTICS
                 rtems_cpu_usage_report();
             #endif
             #ifdef PRINT_STACK_REPORT
                 PRINTF("stack report selected\n")
                 rtems_stack_checker_report_usage();
             #endif
                 return status;
             }
             int enter_mode_normal( unsigned int transitionCoarseTime )
             {
                 /** This function is used to start the NORMAL mode.
                  *
                  * @param transitionCoarseTime is the requested transition time contained in the TC_LFR_ENTER_MODE
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_INCORRECT_STATE - task never started
                  * - RTEMS_ILLEGAL_ON_REMOTE_OBJECT - cannot restart remote task
                  *
                  * The way the NORMAL mode is started depends on the LFR current mode. If LFR is in SBM1 or SBM2,
                  * the snapshots are not restarted, only ASM, BP and CWF data generation are affected.
                  *
                  */
                 int status;
             #ifdef PRINT_TASK_STATISTICS
                 rtems_cpu_usage_reset();
             #endif
                 status = RTEMS_UNSATISFIED;
                 switch( lfrCurrentMode )
                 {
                 case LFR_MODE_STANDBY:
                     status = restart_science_tasks( LFR_MODE_NORMAL ); // restart science tasks
                     if (status == RTEMS_SUCCESSFUL)         // relaunch spectral_matrix and waveform_picker modules
                     {
                         launch_spectral_matrix( );
                         launch_waveform_picker( LFR_MODE_NORMAL, transitionCoarseTime );
                     }
                     break;
                 case LFR_MODE_BURST:
                     status = stop_current_mode();           // stop the current mode
                     status = restart_science_tasks( LFR_MODE_NORMAL ); // restart the science tasks
                     if (status == RTEMS_SUCCESSFUL)         // relaunch spectral_matrix and waveform_picker modules
                     {
                         launch_spectral_matrix( );
                         launch_waveform_picker( LFR_MODE_NORMAL, transitionCoarseTime );
                     }
                     break;
                 case LFR_MODE_SBM1:
                     restart_asm_activities( LFR_MODE_NORMAL ); //  this is necessary to restart ASM tasks to update the parameters
                     status = LFR_SUCCESSFUL;                   // lfrCurrentMode will be updated after the execution of close_action
                     break;
                 case LFR_MODE_SBM2:
                     restart_asm_activities( LFR_MODE_NORMAL ); //  this is necessary to restart ASM tasks to update the parameters
                     status = LFR_SUCCESSFUL;                   // lfrCurrentMode will be updated after the execution of close_action
                     break;
                 default:
                     break;
                 }
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("ERR *** in enter_mode_normal *** status = %d\n", status)
                             status = RTEMS_UNSATISFIED;
                 }
                 return status;
             }
             int enter_mode_burst( unsigned int transitionCoarseTime )
             {
                 /** This function is used to start the BURST mode.
                  *
                  * @param transitionCoarseTime is the requested transition time contained in the TC_LFR_ENTER_MODE
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_INCORRECT_STATE - task never started
                  * - RTEMS_ILLEGAL_ON_REMOTE_OBJECT - cannot restart remote task
                  *
                  * The way the BURST mode is started does not depend on the LFR current mode.
                  *
                  */
                 int status;
             #ifdef PRINT_TASK_STATISTICS
                 rtems_cpu_usage_reset();
             #endif
                 status = stop_current_mode();           // stop the current mode
                 status = restart_science_tasks( LFR_MODE_BURST ); // restart the science tasks
                 if (status == RTEMS_SUCCESSFUL)         // relaunch spectral_matrix and waveform_picker modules
                 {
                     launch_spectral_matrix( );
                     launch_waveform_picker( LFR_MODE_BURST, transitionCoarseTime );
                 }
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("ERR *** in enter_mode_burst *** status = %d\n", status)
                             status = RTEMS_UNSATISFIED;
                 }
                 return status;
             }
             int enter_mode_sbm1( unsigned int transitionCoarseTime )
             {
                 /** This function is used to start the SBM1 mode.
                  *
                  * @param transitionCoarseTime is the requested transition time contained in the TC_LFR_ENTER_MODE
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_INCORRECT_STATE - task never started
                  * - RTEMS_ILLEGAL_ON_REMOTE_OBJECT - cannot restart remote task
                  *
                  * The way the SBM1 mode is started depends on the LFR current mode. If LFR is in NORMAL or SBM2,
                  * the snapshots are not restarted, only ASM, BP and CWF data generation are affected. In other
                  * cases, the acquisition is completely restarted.
                  *
                  */
                 int status;
             #ifdef PRINT_TASK_STATISTICS
                 rtems_cpu_usage_reset();
             #endif
                 status = RTEMS_UNSATISFIED;
                 switch( lfrCurrentMode )
                 {
                 case LFR_MODE_STANDBY:
                     status = restart_science_tasks( LFR_MODE_SBM1 ); // restart science tasks
                     if (status == RTEMS_SUCCESSFUL)         // relaunch spectral_matrix and waveform_picker modules
                     {
                         launch_spectral_matrix( );
                         launch_waveform_picker( LFR_MODE_SBM1, transitionCoarseTime );
                     }
                     break;
                 case LFR_MODE_NORMAL:                       // lfrCurrentMode will be updated after the execution of close_action
                     restart_asm_activities( LFR_MODE_SBM1 );
                     status = LFR_SUCCESSFUL;
                     break;
                 case LFR_MODE_BURST:
                     status = stop_current_mode();           // stop the current mode
                     status = restart_science_tasks( LFR_MODE_SBM1 ); // restart the science tasks
                     if (status == RTEMS_SUCCESSFUL)         // relaunch spectral_matrix and waveform_picker modules
                     {
                         launch_spectral_matrix( );
                         launch_waveform_picker( LFR_MODE_SBM1, transitionCoarseTime );
                     }
                     break;
                 case LFR_MODE_SBM2:
                     restart_asm_activities( LFR_MODE_SBM1 );
                     status = LFR_SUCCESSFUL;                // lfrCurrentMode will be updated after the execution of close_action
                     break;
                 default:
                     break;
                 }
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("ERR *** in enter_mode_sbm1 *** status = %d\n", status)
                             status = RTEMS_UNSATISFIED;
                 }
                 return status;
             }
             int enter_mode_sbm2( unsigned int transitionCoarseTime )
             {
                 /** This function is used to start the SBM2 mode.
                  *
                  * @param transitionCoarseTime is the requested transition time contained in the TC_LFR_ENTER_MODE
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_INCORRECT_STATE - task never started
                  * - RTEMS_ILLEGAL_ON_REMOTE_OBJECT - cannot restart remote task
                  *
                  * The way the SBM2 mode is started depends on the LFR current mode. If LFR is in NORMAL or SBM1,
                  * the snapshots are not restarted, only ASM, BP and CWF data generation are affected. In other
                  * cases, the acquisition is completely restarted.
                  *
                  */
                 int status;
             #ifdef PRINT_TASK_STATISTICS
                 rtems_cpu_usage_reset();
             #endif
                 status = RTEMS_UNSATISFIED;
                 switch( lfrCurrentMode )
                 {
                 case LFR_MODE_STANDBY:
                     status = restart_science_tasks( LFR_MODE_SBM2 ); // restart science tasks
                     if (status == RTEMS_SUCCESSFUL)         // relaunch spectral_matrix and waveform_picker modules
                     {
                         launch_spectral_matrix( );
                         launch_waveform_picker( LFR_MODE_SBM2, transitionCoarseTime );
                     }
                     break;
                 case LFR_MODE_NORMAL:
                     restart_asm_activities( LFR_MODE_SBM2 );
                     status = LFR_SUCCESSFUL;                // lfrCurrentMode will be updated after the execution of close_action
                     break;
                 case LFR_MODE_BURST:
                     status = stop_current_mode();           // stop the current mode
                     status = restart_science_tasks( LFR_MODE_SBM2 ); // restart the science tasks
                     if (status == RTEMS_SUCCESSFUL)         // relaunch spectral_matrix and waveform_picker modules
                     {
                         launch_spectral_matrix( );
                         launch_waveform_picker( LFR_MODE_SBM2, transitionCoarseTime );
                     }
                     break;
                 case LFR_MODE_SBM1:
                     restart_asm_activities( LFR_MODE_SBM2 );
                     status = LFR_SUCCESSFUL;                // lfrCurrentMode will be updated after the execution of close_action
                     break;
                 default:
                     break;
                 }
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("ERR *** in enter_mode_sbm2 *** status = %d\n", status)
                             status = RTEMS_UNSATISFIED;
                 }
                 return status;
             }
             int restart_science_tasks( unsigned char lfrRequestedMode )
             {
                 /** This function is used to restart all science tasks.
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_INCORRECT_STATE - task never started
                  * - RTEMS_ILLEGAL_ON_REMOTE_OBJECT - cannot restart remote task
                  *
                  * Science tasks are AVF0, PRC0, WFRM, CWF3, CW2, CWF1
                  *
                  */
                 rtems_status_code status[10];
                 rtems_status_code ret;
                 ret = RTEMS_SUCCESSFUL;
                 status[0] = rtems_task_restart( Task_id[TASKID_AVF0], lfrRequestedMode );
                 if (status[0] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** AVF0 ERR %d\n", status[0])
                 }
                 status[1] = rtems_task_restart( Task_id[TASKID_PRC0], lfrRequestedMode );
                 if (status[1] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** PRC0 ERR %d\n", status[1])
                 }
                 status[2] = rtems_task_restart( Task_id[TASKID_WFRM],1 );
                 if (status[2] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** WFRM ERR %d\n", status[2])
                 }
                 status[3] = rtems_task_restart( Task_id[TASKID_CWF3],1 );
                 if (status[3] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** CWF3 ERR %d\n", status[3])
                 }
                 status[4] = rtems_task_restart( Task_id[TASKID_CWF2],1 );
                 if (status[4] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** CWF2 ERR %d\n", status[4])
                 }
                 status[5] = rtems_task_restart( Task_id[TASKID_CWF1],1 );
                 if (status[5] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** CWF1 ERR %d\n", status[5])
                 }
                 status[6] = rtems_task_restart( Task_id[TASKID_AVF1], lfrRequestedMode );
                 if (status[6] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** AVF1 ERR %d\n", status[6])
                 }
                 status[7] = rtems_task_restart( Task_id[TASKID_PRC1],lfrRequestedMode );
                 if (status[7] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** PRC1 ERR %d\n", status[7])
                 }
                 status[8] = rtems_task_restart( Task_id[TASKID_AVF2], 1 );
                 if (status[8] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** AVF2 ERR %d\n", status[8])
                 }
                 status[9] = rtems_task_restart( Task_id[TASKID_PRC2], 1 );
                 if (status[9] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** PRC2 ERR %d\n", status[9])
                 }
                 if ( (status[0] != RTEMS_SUCCESSFUL) || (status[1] != RTEMS_SUCCESSFUL) ||
                      (status[2] != RTEMS_SUCCESSFUL) || (status[3] != RTEMS_SUCCESSFUL) ||
                      (status[4] != RTEMS_SUCCESSFUL) || (status[5] != RTEMS_SUCCESSFUL) ||
                      (status[6] != RTEMS_SUCCESSFUL) || (status[7] != RTEMS_SUCCESSFUL) ||
                      (status[8] != RTEMS_SUCCESSFUL) || (status[9] != RTEMS_SUCCESSFUL) )
                 {
                     ret = RTEMS_UNSATISFIED;
                 }
                 return ret;
             }
             int restart_asm_tasks( unsigned char lfrRequestedMode )
             {
                 /** This function is used to restart average spectral matrices tasks.
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_INCORRECT_STATE - task never started
                  * - RTEMS_ILLEGAL_ON_REMOTE_OBJECT - cannot restart remote task
                  *
                  * ASM tasks are AVF0, PRC0, AVF1, PRC1, AVF2 and PRC2
                  *
                  */
                 rtems_status_code status[6];
                 rtems_status_code ret;
                 ret = RTEMS_SUCCESSFUL;
                 status[0] = rtems_task_restart( Task_id[TASKID_AVF0], lfrRequestedMode );
                 if (status[0] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** AVF0 ERR %d\n", status[0])
                 }
                 status[1] = rtems_task_restart( Task_id[TASKID_PRC0], lfrRequestedMode );
                 if (status[1] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** PRC0 ERR %d\n", status[1])
                 }
                 status[2] = rtems_task_restart( Task_id[TASKID_AVF1], lfrRequestedMode );
                 if (status[2] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** AVF1 ERR %d\n", status[2])
                 }
                 status[3] = rtems_task_restart( Task_id[TASKID_PRC1],lfrRequestedMode );
                 if (status[3] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** PRC1 ERR %d\n", status[3])
                 }
                 status[4] = rtems_task_restart( Task_id[TASKID_AVF2], 1 );
                 if (status[4] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** AVF2 ERR %d\n", status[4])
                 }
                 status[5] = rtems_task_restart( Task_id[TASKID_PRC2], 1 );
                 if (status[5] != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in restart_science_task *** PRC2 ERR %d\n", status[5])
                 }
                 if ( (status[0] != RTEMS_SUCCESSFUL) || (status[1] != RTEMS_SUCCESSFUL) ||
                      (status[2] != RTEMS_SUCCESSFUL) || (status[3] != RTEMS_SUCCESSFUL) ||
                      (status[4] != RTEMS_SUCCESSFUL) || (status[5] != RTEMS_SUCCESSFUL) )
                 {
                     ret = RTEMS_UNSATISFIED;
                 }
                 return ret;
             }
             int suspend_science_tasks( void )
             {
                 /** This function suspends the science tasks.
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_ALREADY_SUSPENDED - task already suspended
                  *
                  */
                 rtems_status_code status;
                 PRINTF("in suspend_science_tasks\n")
                         status = rtems_task_suspend( Task_id[TASKID_AVF0] );    // suspend AVF0
                 if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                 {
                     PRINTF1("in suspend_science_task *** AVF0 ERR %d\n", status)
                 }
                 else
                 {
                     status = RTEMS_SUCCESSFUL;
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend PRC0
                 {
                     status = rtems_task_suspend( Task_id[TASKID_PRC0] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** PRC0 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend AVF1
                 {
                     status = rtems_task_suspend( Task_id[TASKID_AVF1] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** AVF1 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend PRC1
                 {
                     status = rtems_task_suspend( Task_id[TASKID_PRC1] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** PRC1 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend AVF2
                 {
                     status = rtems_task_suspend( Task_id[TASKID_AVF2] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** AVF2 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend PRC2
                 {
                     status = rtems_task_suspend( Task_id[TASKID_PRC2] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** PRC2 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend WFRM
                 {
                     status = rtems_task_suspend( Task_id[TASKID_WFRM] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** WFRM ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend CWF3
                 {
                     status = rtems_task_suspend( Task_id[TASKID_CWF3] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** CWF3 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend CWF2
                 {
                     status = rtems_task_suspend( Task_id[TASKID_CWF2] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** CWF2 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend CWF1
                 {
                     status = rtems_task_suspend( Task_id[TASKID_CWF1] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** CWF1 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 return status;
             }
             int suspend_asm_tasks( void )
             {
                 /** This function suspends the science tasks.
                  *
                  * @return RTEMS directive status codes:
                  * - RTEMS_SUCCESSFUL - task restarted successfully
                  * - RTEMS_INVALID_ID - task id invalid
                  * - RTEMS_ALREADY_SUSPENDED - task already suspended
                  *
                  */
                 rtems_status_code status;
                 PRINTF("in suspend_science_tasks\n")
                         status = rtems_task_suspend( Task_id[TASKID_AVF0] );    // suspend AVF0
                 if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                 {
                     PRINTF1("in suspend_science_task *** AVF0 ERR %d\n", status)
                 }
                 else
                 {
                     status = RTEMS_SUCCESSFUL;
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend PRC0
                 {
                     status = rtems_task_suspend( Task_id[TASKID_PRC0] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** PRC0 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend AVF1
                 {
                     status = rtems_task_suspend( Task_id[TASKID_AVF1] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** AVF1 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend PRC1
                 {
                     status = rtems_task_suspend( Task_id[TASKID_PRC1] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** PRC1 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend AVF2
                 {
                     status = rtems_task_suspend( Task_id[TASKID_AVF2] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** AVF2 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 if (status == RTEMS_SUCCESSFUL)        // suspend PRC2
                 {
                     status = rtems_task_suspend( Task_id[TASKID_PRC2] );
                     if ((status != RTEMS_SUCCESSFUL) && (status != RTEMS_ALREADY_SUSPENDED))
                     {
                         PRINTF1("in suspend_science_task *** PRC2 ERR %d\n", status)
                     }
                     else
                     {
                         status = RTEMS_SUCCESSFUL;
                     }
                 }
                 return status;
             }
             void launch_waveform_picker( unsigned char mode, unsigned int transitionCoarseTime )
             {
                 WFP_reset_current_ring_nodes();
                 reset_waveform_picker_regs();
                 set_wfp_burst_enable_register( mode );
                 LEON_Clear_interrupt( IRQ_WAVEFORM_PICKER );
                 LEON_Unmask_interrupt( IRQ_WAVEFORM_PICKER );
                 if (transitionCoarseTime == 0)
                 {
-                    waveform_picker_regs->start_date = time_management_regs->coarse_time;
+                    // instant transition means transition on the next valid date
+                    // this is mandatory to have a good snapshot period a a good correction of the snapshot period
+                    waveform_picker_regs->start_date = time_management_regs->coarse_time + 1;
                 }
                 else
                 {
                     waveform_picker_regs->start_date = transitionCoarseTime;
                 }
             }
             void launch_spectral_matrix( void )
             {
                 SM_reset_current_ring_nodes();
                 reset_spectral_matrix_regs();
                 reset_nb_sm();
                 set_sm_irq_onNewMatrix( 1 );
                 LEON_Clear_interrupt( IRQ_SPECTRAL_MATRIX );
                 LEON_Unmask_interrupt( IRQ_SPECTRAL_MATRIX );
             }
             void set_sm_irq_onNewMatrix( unsigned char value )
             {
                 if (value == 1)
                 {
                     spectral_matrix_regs->config = spectral_matrix_regs->config | 0x01;
                 }
                 else
                 {
                     spectral_matrix_regs->config = spectral_matrix_regs->config & 0xfffffffe;   // 1110
                 }
             }
             void set_sm_irq_onError( unsigned char value )
             {
                 if (value == 1)
                 {
                     spectral_matrix_regs->config = spectral_matrix_regs->config | 0x02;
                 }
                 else
                 {
                     spectral_matrix_regs->config = spectral_matrix_regs->config & 0xfffffffd;   // 1101
                 }
             }
             //*****************************
             // CONFIGURE CALIBRATION SIGNAL
             void setCalibrationPrescaler( unsigned int prescaler )
             {
                 // prescaling of the master clock (25 MHz)
                 // master clock is divided by 2^prescaler
                 time_management_regs->calPrescaler = prescaler;
             }
             void setCalibrationDivisor( unsigned int divisionFactor )
             {
                 // division of the prescaled clock by the division factor
                 time_management_regs->calDivisor = divisionFactor;
             }
             void setCalibrationData( void ){
                 unsigned int k;
                 unsigned short data;
                 float val;
                 float f0;
                 float f1;
                 float fs;
                 float Ts;
                 float scaleFactor;
                 f0 = 625;
                 f1 = 10000;
                 fs = 160256.410;
                 Ts = 1. / fs;
                 scaleFactor = 0.250 / 0.000654; // 191, 500 mVpp, 2 sinus waves => 500 mVpp each, amplitude = 250 mV
                 time_management_regs->calDataPtr = 0x00;
                 // build the signal for the SCM calibration
                 for (k=0; k<256; k++)
                 {
                     val = sin( 2 * pi * f0 * k * Ts )
                             + sin(  2 * pi * f1 * k * Ts );
                     data = (unsigned short) ((val * scaleFactor) + 2048);
                     time_management_regs->calData = data & 0xfff;
                 }
             }
             void setCalibrationDataInterleaved( void ){
                 unsigned int k;
                 float val;
                 float f0;
                 float f1;
                 float fs;
                 float Ts;
                 unsigned short data[384];
                 unsigned char *dataPtr;
                 f0 = 625;
                 f1 = 10000;
                 fs = 240384.615;
                 Ts = 1. / fs;
                 time_management_regs->calDataPtr = 0x00;
                 // build the signal for the SCM calibration
                 for (k=0; k<384; k++)
                 {
                     val = sin( 2 * pi * f0 * k * Ts )
                             + sin(  2 * pi * f1 * k * Ts );
                     data[k] = (unsigned short) (val * 512 + 2048);
                 }
                 // write the signal in interleaved mode
                 for (k=0; k<128; k++)
                 {
                     dataPtr = (unsigned char*) &data[k*3 + 2];
                     time_management_regs->calData = (data[k*3] & 0xfff)
                             + ( (dataPtr[0] & 0x3f) << 12);
                     time_management_regs->calData = (data[k*3 + 1] & 0xfff)
                             + ( (dataPtr[1] & 0x3f) << 12);
                 }
             }
             void setCalibrationReload( bool state)
             {
                 if (state == true)
                 {
                     time_management_regs->calDACCtrl = time_management_regs->calDACCtrl | 0x00000010;   // [0001 0000]
                 }
                 else
                 {
                     time_management_regs->calDACCtrl = time_management_regs->calDACCtrl & 0xffffffef;   // [1110 1111]
                 }
             }
             void setCalibrationEnable( bool state )
             {
                 // this bit drives the multiplexer
                 if (state == true)
                 {
                     time_management_regs->calDACCtrl = time_management_regs->calDACCtrl | 0x00000040;   // [0100 0000]
                 }
                 else
                 {
                     time_management_regs->calDACCtrl = time_management_regs->calDACCtrl & 0xffffffbf; // [1011 1111]
                 }
             }
             void setCalibrationInterleaved( bool state )
             {
                 // this bit drives the multiplexer
                 if (state == true)
                 {
                     time_management_regs->calDACCtrl = time_management_regs->calDACCtrl | 0x00000020;   // [0010 0000]
                 }
                 else
                 {
                     time_management_regs->calDACCtrl = time_management_regs->calDACCtrl & 0xffffffdf; // [1101 1111]
                 }
             }
             void setCalibration( bool state )
             {
                 if (state == true)
                 {
                     setCalibrationEnable( true );
                     setCalibrationReload( false );
                     set_hk_lfr_calib_enable( true );
                 }
                 else
                 {
                     setCalibrationEnable( false );
                     setCalibrationReload( true );
                     set_hk_lfr_calib_enable( false );
                 }
             }
             void configureCalibration( bool interleaved )
             {
                 setCalibration( false );
                 if ( interleaved == true )
                 {
                     setCalibrationInterleaved( true );
                     setCalibrationPrescaler( 0 );   // 25 MHz   => 25 000 000
                     setCalibrationDivisor(  26 );   //          => 240 384
                     setCalibrationDataInterleaved();
                 }
                 else
                 {
                     setCalibrationPrescaler( 0 );   // 25 MHz   => 25 000 000
                     setCalibrationDivisor(  38 );   //          => 160 256 (39 - 1)
                     setCalibrationData();
                 }
             }
             //****************
             // CLOSING ACTIONS
             void update_last_TC_exe( ccsdsTelecommandPacket_t *TC, unsigned char * time )
             {
                 /** This function is used to update the HK packets statistics after a successful TC execution.
                  *
                  * @param TC points to the TC being processed
                  * @param time is the time used to date the TC execution
                  *
                  */
                 unsigned int val;
                 housekeeping_packet.hk_lfr_last_exe_tc_id[0] = TC->packetID[0];
                 housekeeping_packet.hk_lfr_last_exe_tc_id[1] = TC->packetID[1];
                 housekeeping_packet.hk_lfr_last_exe_tc_type[0] = 0x00;
                 housekeeping_packet.hk_lfr_last_exe_tc_type[1] = TC->serviceType;
                 housekeeping_packet.hk_lfr_last_exe_tc_subtype[0] = 0x00;
                 housekeeping_packet.hk_lfr_last_exe_tc_subtype[1] = TC->serviceSubType;
                 housekeeping_packet.hk_lfr_last_exe_tc_time[0] = time[0];
                 housekeeping_packet.hk_lfr_last_exe_tc_time[1] = time[1];
                 housekeeping_packet.hk_lfr_last_exe_tc_time[2] = time[2];
                 housekeeping_packet.hk_lfr_last_exe_tc_time[3] = time[3];
                 housekeeping_packet.hk_lfr_last_exe_tc_time[4] = time[4];
                 housekeeping_packet.hk_lfr_last_exe_tc_time[5] = time[5];
                 val = housekeeping_packet.hk_lfr_exe_tc_cnt[0] * 256 + housekeeping_packet.hk_lfr_exe_tc_cnt[1];
                 val++;
                 housekeeping_packet.hk_lfr_exe_tc_cnt[0] = (unsigned char) (val >> 8);
                 housekeeping_packet.hk_lfr_exe_tc_cnt[1] = (unsigned char) (val);
             }
             void update_last_TC_rej(ccsdsTelecommandPacket_t *TC, unsigned char * time )
             {
                 /** This function is used to update the HK packets statistics after a TC rejection.
                  *
                  * @param TC points to the TC being processed
                  * @param time is the time used to date the TC rejection
                  *
                  */
                 unsigned int val;
                 housekeeping_packet.hk_lfr_last_rej_tc_id[0] = TC->packetID[0];
                 housekeeping_packet.hk_lfr_last_rej_tc_id[1] = TC->packetID[1];
                 housekeeping_packet.hk_lfr_last_rej_tc_type[0] = 0x00;
                 housekeeping_packet.hk_lfr_last_rej_tc_type[1] = TC->serviceType;
                 housekeeping_packet.hk_lfr_last_rej_tc_subtype[0] = 0x00;
                 housekeeping_packet.hk_lfr_last_rej_tc_subtype[1] = TC->serviceSubType;
                 housekeeping_packet.hk_lfr_last_rej_tc_time[0] = time[0];
                 housekeeping_packet.hk_lfr_last_rej_tc_time[1] = time[1];
                 housekeeping_packet.hk_lfr_last_rej_tc_time[2] = time[2];
                 housekeeping_packet.hk_lfr_last_rej_tc_time[3] = time[3];
                 housekeeping_packet.hk_lfr_last_rej_tc_time[4] = time[4];
                 housekeeping_packet.hk_lfr_last_rej_tc_time[5] = time[5];
                 val = housekeeping_packet.hk_lfr_rej_tc_cnt[0] * 256 + housekeeping_packet.hk_lfr_rej_tc_cnt[1];
                 val++;
                 housekeeping_packet.hk_lfr_rej_tc_cnt[0] = (unsigned char) (val >> 8);
                 housekeeping_packet.hk_lfr_rej_tc_cnt[1] = (unsigned char) (val);
             }
             void close_action(ccsdsTelecommandPacket_t *TC, int result, rtems_id queue_id )
             {
                 /** This function is the last step of the TC execution workflow.
                  *
                  * @param TC points to the TC being processed
                  * @param result is the result of the TC execution (LFR_SUCCESSFUL / LFR_DEFAULT)
                  * @param queue_id is the id of the RTEMS message queue used to send TM packets
                  * @param time is the time used to date the TC execution
                  *
                  */
                 unsigned char requestedMode;
                 if (result == LFR_SUCCESSFUL)
                 {
                     if ( !( (TC->serviceType==TC_TYPE_TIME) & (TC->serviceSubType==TC_SUBTYPE_UPDT_TIME) )
                          &
                          !( (TC->serviceType==TC_TYPE_GEN) & (TC->serviceSubType==TC_SUBTYPE_UPDT_INFO))
                          )
                     {
                         send_tm_lfr_tc_exe_success( TC, queue_id );
                     }
                     if ( (TC->serviceType == TC_TYPE_GEN) & (TC->serviceSubType == TC_SUBTYPE_ENTER) )
                     {
                         //**********************************
                         // UPDATE THE LFRMODE LOCAL VARIABLE
                         requestedMode = TC->dataAndCRC[1];
                         housekeeping_packet.lfr_status_word[0] = (unsigned char) ((requestedMode << 4) + 0x0d);
                         updateLFRCurrentMode();
                     }
                 }
                 else if (result == LFR_EXE_ERROR)
                 {
                     send_tm_lfr_tc_exe_error( TC, queue_id );
                 }
             }
             //***************************
             // Interrupt Service Routines
             rtems_isr commutation_isr1( rtems_vector_number vector )
             {
                 if (rtems_event_send( Task_id[TASKID_DUMB], RTEMS_EVENT_0 ) != RTEMS_SUCCESSFUL) {
                     PRINTF("In commutation_isr1 *** Error sending event to DUMB\n")
                 }
             }
             rtems_isr commutation_isr2( rtems_vector_number vector )
             {
                 if (rtems_event_send( Task_id[TASKID_DUMB], RTEMS_EVENT_0 ) != RTEMS_SUCCESSFUL) {
                     PRINTF("In commutation_isr2 *** Error sending event to DUMB\n")
                 }
             }
             //****************
             // OTHER FUNCTIONS
             void updateLFRCurrentMode()
             {
                 /** This function updates the value of the global variable lfrCurrentMode.
                  *
                  * lfrCurrentMode is a parameter used by several functions to know in which mode LFR is running.
                  *
                  */
                 // update the local value of lfrCurrentMode with the value contained in the housekeeping_packet structure
                 lfrCurrentMode = (housekeeping_packet.lfr_status_word[0] & 0xf0) >> 4;
             }
             void set_lfr_soft_reset( unsigned char value )
             {
                 if (value == 1)
                 {
                     time_management_regs->ctrl = time_management_regs->ctrl | 0x00000004; // [0100]
                 }
                 else
                 {
                     time_management_regs->ctrl = time_management_regs->ctrl & 0xfffffffb; // [1011]
                 }
             }
             void reset_lfr( void )
             {
                 set_lfr_soft_reset( 1 );
                 set_lfr_soft_reset( 0 );
                 set_hk_lfr_sc_potential_flag( true );
             }

src/wf_handler.c +9 -21

             /** Functions and tasks related to waveform packet generation.
              *
              * @file
              * @author P. LEROY
              *
              * A group of functions to handle waveforms, in snapshot or continuous format.\n
              *
              */
             #include "wf_handler.h"
             //***************
             // waveform rings
             // F0
             ring_node waveform_ring_f0[NB_RING_NODES_F0];
             ring_node *current_ring_node_f0;
             ring_node *ring_node_to_send_swf_f0;
             // F1
             ring_node waveform_ring_f1[NB_RING_NODES_F1];
             ring_node *current_ring_node_f1;
             ring_node *ring_node_to_send_swf_f1;
             ring_node *ring_node_to_send_cwf_f1;
             // F2
             ring_node waveform_ring_f2[NB_RING_NODES_F2];
             ring_node *current_ring_node_f2;
             ring_node *ring_node_to_send_swf_f2;
             ring_node *ring_node_to_send_cwf_f2;
             // F3
             ring_node waveform_ring_f3[NB_RING_NODES_F3];
             ring_node *current_ring_node_f3;
             ring_node *ring_node_to_send_cwf_f3;
             char wf_cont_f3_light[ (NB_SAMPLES_PER_SNAPSHOT) * NB_BYTES_CWF3_LIGHT_BLK ];
             bool extractSWF1 = false;
             bool extractSWF2 = false;
             bool swf0_ready_flag_f1 = false;
             bool swf0_ready_flag_f2 = false;
             bool swf1_ready = false;
             bool swf2_ready = false;
             int swf1_extracted[ (NB_SAMPLES_PER_SNAPSHOT * NB_WORDS_SWF_BLK) ];
             int swf2_extracted[ (NB_SAMPLES_PER_SNAPSHOT * NB_WORDS_SWF_BLK) ];
             ring_node ring_node_swf1_extracted;
             ring_node ring_node_swf2_extracted;
             //*********************
             // Interrupt SubRoutine
             ring_node * getRingNodeToSendCWF( unsigned char frequencyChannel)
             {
                 ring_node *node;
                 node = NULL;
                 switch ( frequencyChannel ) {
                 case 1:
                     node = ring_node_to_send_cwf_f1;
                     break;
                 case 2:
                     node = ring_node_to_send_cwf_f2;
                     break;
                 case 3:
                     node = ring_node_to_send_cwf_f3;
                     break;
                 default:
                     break;
                 }
                 return node;
             }
             ring_node * getRingNodeToSendSWF( unsigned char frequencyChannel)
             {
                 ring_node *node;
                 node = NULL;
                 switch ( frequencyChannel ) {
                 case 0:
                     node = ring_node_to_send_swf_f0;
                     break;
                 case 1:
                     node = ring_node_to_send_swf_f1;
                     break;
                 case 2:
                     node = ring_node_to_send_swf_f2;
                     break;
                 default:
                     break;
                 }
                 return node;
             }
             void reset_extractSWF( void )
             {
                 extractSWF1 = false;
                 extractSWF2 = false;
                 swf0_ready_flag_f1 = false;
                 swf0_ready_flag_f2 = false;
                 swf1_ready = false;
                 swf2_ready = false;
             }
             inline void waveforms_isr_f3( void )
             {
                 rtems_status_code spare_status;
                 if ( (lfrCurrentMode == LFR_MODE_NORMAL) || (lfrCurrentMode == LFR_MODE_BURST)  // in BURST the data are used to place v, e1 and e2 in the HK packet
                      || (lfrCurrentMode == LFR_MODE_SBM1) || (lfrCurrentMode == LFR_MODE_SBM2) )
                 { // in modes other than STANDBY and BURST, send the CWF_F3 data
                     //***
                     // F3
                     if ( (waveform_picker_regs->status & 0xc0) != 0x00 ) {  // [1100 0000] check the f3 full bits
                         ring_node_to_send_cwf_f3    = current_ring_node_f3->previous;
                         current_ring_node_f3        = current_ring_node_f3->next;
                         if ((waveform_picker_regs->status & 0x40) == 0x40){         // [0100 0000] f3 buffer 0 is full
                             ring_node_to_send_cwf_f3->coarseTime    = waveform_picker_regs->f3_0_coarse_time;
                             ring_node_to_send_cwf_f3->fineTime      = waveform_picker_regs->f3_0_fine_time;
                             waveform_picker_regs->addr_data_f3_0    = current_ring_node_f3->buffer_address;
                             waveform_picker_regs->status            = waveform_picker_regs->status & 0x00008840; // [1000 1000 0100 0000]
                         }
                         else if ((waveform_picker_regs->status & 0x80) == 0x80){     // [1000 0000] f3 buffer 1 is full
                             ring_node_to_send_cwf_f3->coarseTime    = waveform_picker_regs->f3_1_coarse_time;
                             ring_node_to_send_cwf_f3->fineTime      = waveform_picker_regs->f3_1_fine_time;
                             waveform_picker_regs->addr_data_f3_1    = current_ring_node_f3->buffer_address;
                             waveform_picker_regs->status            = waveform_picker_regs->status & 0x00008880; // [1000 1000 1000 0000]
                         }
                         if (rtems_event_send( Task_id[TASKID_CWF3], RTEMS_EVENT_0 ) != RTEMS_SUCCESSFUL) {
                             spare_status = rtems_event_send( Task_id[TASKID_DUMB], RTEMS_EVENT_0 );
                         }
                     }
                 }
             }
             inline void waveforms_isr_burst( void )
             {
                 unsigned char status;
                 rtems_status_code spare_status;
                 status = (waveform_picker_regs->status & 0x30) >> 4;   // [0011 0000] get the status bits for f2
                 switch(status)
                 {
                 case 1:
                     ring_node_to_send_cwf_f2                = current_ring_node_f2->previous;
                     ring_node_to_send_cwf_f2->sid           = SID_BURST_CWF_F2;
                     ring_node_to_send_cwf_f2->coarseTime    = waveform_picker_regs->f2_0_coarse_time;
                     ring_node_to_send_cwf_f2->fineTime      = waveform_picker_regs->f2_0_fine_time;
                     current_ring_node_f2                    = current_ring_node_f2->next;
                     waveform_picker_regs->addr_data_f2_0    = current_ring_node_f2->buffer_address;
                     if (rtems_event_send( Task_id[TASKID_CWF2], RTEMS_EVENT_MODE_BURST ) != RTEMS_SUCCESSFUL) {
                         spare_status = rtems_event_send( Task_id[TASKID_DUMB], RTEMS_EVENT_0 );
                     }
                     waveform_picker_regs->status            = waveform_picker_regs->status & 0x00004410; // [0100 0100 0001 0000]
                     break;
                 case 2:
                     ring_node_to_send_cwf_f2                = current_ring_node_f2->previous;
                     ring_node_to_send_cwf_f2->sid           = SID_BURST_CWF_F2;
                     ring_node_to_send_cwf_f2->coarseTime    = waveform_picker_regs->f2_1_coarse_time;
                     ring_node_to_send_cwf_f2->fineTime      = waveform_picker_regs->f2_1_fine_time;
                     current_ring_node_f2                    = current_ring_node_f2->next;
                     waveform_picker_regs->addr_data_f2_1    = current_ring_node_f2->buffer_address;
                     if (rtems_event_send( Task_id[TASKID_CWF2], RTEMS_EVENT_MODE_BURST ) != RTEMS_SUCCESSFUL) {
                         spare_status = rtems_event_send( Task_id[TASKID_DUMB], RTEMS_EVENT_0 );
                     }
                     waveform_picker_regs->status            = waveform_picker_regs->status & 0x00004420; // [0100 0100 0010 0000]
                     break;
                 default:
                     break;
                 }
             }
             inline void waveform_isr_normal_sbm1_sbm2( void )
             {
                 rtems_status_code status;
                 //***
                 // F0
                 if ( (waveform_picker_regs->status & 0x03) != 0x00 )  // [0000 0011] check the f0 full bits
                 {
                     swf0_ready_flag_f1 = true;
                     swf0_ready_flag_f2 = true;
                     ring_node_to_send_swf_f0    = current_ring_node_f0->previous;
                     current_ring_node_f0        = current_ring_node_f0->next;
                     if ( (waveform_picker_regs->status & 0x01) == 0x01)
                     {
                         ring_node_to_send_swf_f0->coarseTime    = waveform_picker_regs->f0_0_coarse_time;
                         ring_node_to_send_swf_f0->fineTime      = waveform_picker_regs->f0_0_fine_time;
                         waveform_picker_regs->addr_data_f0_0    = current_ring_node_f0->buffer_address;
                         waveform_picker_regs->status            = waveform_picker_regs->status & 0x00001101; // [0001 0001 0000 0001]
                     }
                     else if ( (waveform_picker_regs->status & 0x02) == 0x02)
                     {
                         ring_node_to_send_swf_f0->coarseTime    = waveform_picker_regs->f0_1_coarse_time;
                         ring_node_to_send_swf_f0->fineTime      = waveform_picker_regs->f0_1_fine_time;
                         waveform_picker_regs->addr_data_f0_1    = current_ring_node_f0->buffer_address;
                         waveform_picker_regs->status            = waveform_picker_regs->status & 0x00001102; // [0001 0001 0000 0010]
                     }
                 }
                 //***
                 // F1
                 if ( (waveform_picker_regs->status & 0x0c) != 0x00 ) {  // [0000 1100] check the f1 full bits
                     // (1) change the receiving buffer for the waveform picker
                     ring_node_to_send_cwf_f1    = current_ring_node_f1->previous;
                     current_ring_node_f1        = current_ring_node_f1->next;
                     if ( (waveform_picker_regs->status & 0x04) == 0x04)
                     {
                         ring_node_to_send_cwf_f1->coarseTime    = waveform_picker_regs->f1_0_coarse_time;
                         ring_node_to_send_cwf_f1->fineTime      = waveform_picker_regs->f1_0_fine_time;
                         waveform_picker_regs->addr_data_f1_0    = current_ring_node_f1->buffer_address;
                         waveform_picker_regs->status            = waveform_picker_regs->status & 0x00002204; // [0010 0010 0000 0100] f1 bits = 0
                     }
                     else if ( (waveform_picker_regs->status & 0x08) == 0x08)
                     {
                         ring_node_to_send_cwf_f1->coarseTime    = waveform_picker_regs->f1_1_coarse_time;
                         ring_node_to_send_cwf_f1->fineTime      = waveform_picker_regs->f1_1_fine_time;
                         waveform_picker_regs->addr_data_f1_1    = current_ring_node_f1->buffer_address;
                         waveform_picker_regs->status            = waveform_picker_regs->status & 0x00002208; // [0010 0010 0000 1000] f1 bits = 0
                     }
                     // (2) send an event for the the CWF1 task for transmission (and snapshot extraction if needed)
                     status = rtems_event_send( Task_id[TASKID_CWF1], RTEMS_EVENT_MODE_NORM_S1_S2 );
                 }
                 //***
                 // F2
                 if ( (waveform_picker_regs->status & 0x30) != 0x00 ) {  // [0011 0000] check the f2 full bit
                     // (1) change the receiving buffer for the waveform picker
                     ring_node_to_send_cwf_f2      = current_ring_node_f2->previous;
                     ring_node_to_send_cwf_f2->sid = SID_SBM2_CWF_F2;
                     current_ring_node_f2          = current_ring_node_f2->next;
                     if ( (waveform_picker_regs->status & 0x10) == 0x10)
                     {
                         ring_node_to_send_cwf_f2->coarseTime    = waveform_picker_regs->f2_0_coarse_time;
                         ring_node_to_send_cwf_f2->fineTime      = waveform_picker_regs->f2_0_fine_time;
                         waveform_picker_regs->addr_data_f2_0    = current_ring_node_f2->buffer_address;
                         waveform_picker_regs->status            = waveform_picker_regs->status & 0x00004410; // [0100 0100 0001 0000]
                     }
                     else if ( (waveform_picker_regs->status & 0x20) == 0x20)
                     {
                         ring_node_to_send_cwf_f2->coarseTime    = waveform_picker_regs->f2_1_coarse_time;
                         ring_node_to_send_cwf_f2->fineTime      = waveform_picker_regs->f2_1_fine_time;
                         waveform_picker_regs->addr_data_f2_1    = current_ring_node_f2->buffer_address;
                         waveform_picker_regs->status            = waveform_picker_regs->status & 0x00004420; // [0100 0100 0010 0000]
                     }
                     // (2) send an event for the waveforms transmission
                     status = rtems_event_send( Task_id[TASKID_CWF2], RTEMS_EVENT_MODE_NORM_S1_S2 );
                 }
             }
             rtems_isr waveforms_isr( rtems_vector_number vector )
             {
                 /** This is the interrupt sub routine called by the waveform picker core.
                  *
                  * This ISR launch different actions depending mainly on two pieces of information:
                  * 1. the values read in the registers of the waveform picker.
                  * 2. the current LFR mode.
                  *
                  */
                 // STATUS
                 // new error        error buffer full
                 // 15 14 13 12      11 10 9  8
                 // f3 f2 f1 f0      f3 f2 f1 f0
                 //
                 // ready buffer
                 // 7    6    5    4    3    2    1    0
                 // f3_1 f3_0 f2_1 f2_0 f1_1 f1_0 f0_1 f0_0
                 rtems_status_code spare_status;
                 waveforms_isr_f3();
                 if ( (waveform_picker_regs->status & 0xff00) != 0x00)    // [1111 1111 0000 0000] check the error bits
                 {
                     spare_status = rtems_event_send( Task_id[TASKID_DUMB], RTEMS_EVENT_10 );
                 }
                 switch(lfrCurrentMode)
                 {
                 //********
                 // STANDBY
                 case LFR_MODE_STANDBY:
                     break;
                     //**************************
                     // LFR NORMAL, SBM1 and SBM2
                 case LFR_MODE_NORMAL:
                 case LFR_MODE_SBM1:
                 case LFR_MODE_SBM2:
                     waveform_isr_normal_sbm1_sbm2();
                     break;
                     //******
                     // BURST
                 case LFR_MODE_BURST:
                     waveforms_isr_burst();
                     break;
                     //********
                     // DEFAULT
                 default:
                     break;
                 }
             }
             //************
             // RTEMS TASKS
             rtems_task wfrm_task(rtems_task_argument argument) //used with the waveform picker VHDL IP
             {
                 /** This RTEMS task is dedicated to the transmission of snapshots of the NORMAL mode.
                  *
                  * @param unused is the starting argument of the RTEMS task
                  *
                  * The following data packets are sent by this task:
                  * - TM_LFR_SCIENCE_NORMAL_SWF_F0
                  * - TM_LFR_SCIENCE_NORMAL_SWF_F1
                  * - TM_LFR_SCIENCE_NORMAL_SWF_F2
                  *
                  */
                 rtems_event_set event_out;
                 rtems_id queue_id;
                 rtems_status_code status;
-                bool resynchronisationEngaged;
                 ring_node *ring_node_swf1_extracted_ptr;
                 ring_node *ring_node_swf2_extracted_ptr;
                 ring_node_swf1_extracted_ptr = (ring_node *) &ring_node_swf1_extracted;
                 ring_node_swf2_extracted_ptr = (ring_node *) &ring_node_swf2_extracted;
-                resynchronisationEngaged = false;
                 status =  get_message_queue_id_send( &queue_id );
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in WFRM *** ERR get_message_queue_id_send %d\n", status);
                 }
                 BOOT_PRINTF("in WFRM ***\n");
                 while(1){
                     // wait for an RTEMS_EVENT
                     rtems_event_receive(RTEMS_EVENT_MODE_NORMAL,
                                         RTEMS_WAIT | RTEMS_EVENT_ANY, RTEMS_NO_TIMEOUT, &event_out);
-                    if(resynchronisationEngaged == false)
-                    {   // engage resynchronisation
+                    snapshot_resynchronization( (unsigned char *)  &ring_node_to_send_swf_f0->coarseTime );
-                        snapshot_resynchronization( (unsigned char *)  &ring_node_to_send_swf_f0->coarseTime );
-                        resynchronisationEngaged = true;
-                    else
-                    {   // reset delta_snapshot to the nominal value
-                        PRINTF("no resynchronisation, reset delta_snapshot to the nominal value\n");
-                        set_wfp_delta_snapshot();
-                        resynchronisationEngaged = false;
-                    //
                     if (event_out == RTEMS_EVENT_MODE_NORMAL)
                     {
                         DEBUG_PRINTF("WFRM received RTEMS_EVENT_MODE_SBM2\n");
                         ring_node_to_send_swf_f0->sid           = SID_NORM_SWF_F0;
                         ring_node_swf1_extracted_ptr->sid       = SID_NORM_SWF_F1;
                         ring_node_swf2_extracted_ptr->sid       = SID_NORM_SWF_F2;
                         status =  rtems_message_queue_send( queue_id, &ring_node_to_send_swf_f0,     sizeof( ring_node* ) );
                         status =  rtems_message_queue_send( queue_id, &ring_node_swf1_extracted_ptr, sizeof( ring_node* ) );
                         status =  rtems_message_queue_send( queue_id, &ring_node_swf2_extracted_ptr, sizeof( ring_node* ) );
                     }
                 }
             }
             rtems_task cwf3_task(rtems_task_argument argument) //used with the waveform picker VHDL IP
             {
                 /** This RTEMS task is dedicated to the transmission of continuous waveforms at f3.
                  *
                  * @param unused is the starting argument of the RTEMS task
                  *
                  * The following data packet is sent by this task:
                  * - TM_LFR_SCIENCE_NORMAL_CWF_F3
                  *
                  */
                 rtems_event_set event_out;
                 rtems_id queue_id;
                 rtems_status_code status;
                 ring_node ring_node_cwf3_light;
                 ring_node *ring_node_to_send_cwf;
                 status =  get_message_queue_id_send( &queue_id );
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in CWF3 *** ERR get_message_queue_id_send %d\n", status)
                 }
                 ring_node_to_send_cwf_f3->sid = SID_NORM_CWF_LONG_F3;
                 // init the ring_node_cwf3_light structure
                 ring_node_cwf3_light.buffer_address = (int) wf_cont_f3_light;
                 ring_node_cwf3_light.coarseTime = 0x00;
                 ring_node_cwf3_light.fineTime = 0x00;
                 ring_node_cwf3_light.next = NULL;
                 ring_node_cwf3_light.previous = NULL;
                 ring_node_cwf3_light.sid = SID_NORM_CWF_F3;
                 ring_node_cwf3_light.status = 0x00;
                 BOOT_PRINTF("in CWF3 ***\n")
                         while(1){
                     // wait for an RTEMS_EVENT
                     rtems_event_receive( RTEMS_EVENT_0,
                                          RTEMS_WAIT | RTEMS_EVENT_ANY, RTEMS_NO_TIMEOUT, &event_out);
                     if ( (lfrCurrentMode == LFR_MODE_NORMAL)
                          || (lfrCurrentMode == LFR_MODE_SBM1) || (lfrCurrentMode==LFR_MODE_SBM2) )
                     {
                         ring_node_to_send_cwf = getRingNodeToSendCWF( 3 );
                         if ( (parameter_dump_packet.sy_lfr_n_cwf_long_f3 & 0x01) == 0x01)
                         {
                             PRINTF("send CWF_LONG_F3\n")
                                     ring_node_to_send_cwf_f3->sid = SID_NORM_CWF_LONG_F3;
                             status =  rtems_message_queue_send( queue_id, &ring_node_to_send_cwf, sizeof( ring_node* ) );
                         }
                         else
                         {
                             PRINTF("send CWF_F3 (light)\n")
                                     send_waveform_CWF3_light( ring_node_to_send_cwf, &ring_node_cwf3_light, queue_id );
                         }
                     }
                     else
                     {
                         PRINTF1("in CWF3 *** lfrCurrentMode is %d, no data will be sent\n", lfrCurrentMode)
                     }
                 }
             }
             rtems_task cwf2_task(rtems_task_argument argument)  // ONLY USED IN BURST AND SBM2
             {
                 /** This RTEMS task is dedicated to the transmission of continuous waveforms at f2.
                  *
                  * @param unused is the starting argument of the RTEMS task
                  *
                  * The following data packet is sent by this function:
                  * - TM_LFR_SCIENCE_BURST_CWF_F2
                  * - TM_LFR_SCIENCE_SBM2_CWF_F2
                  *
                  */
                 rtems_event_set event_out;
                 rtems_id queue_id;
                 rtems_status_code status;
                 ring_node *ring_node_to_send;
                 unsigned long long int acquisitionTimeF0_asLong;
                 acquisitionTimeF0_asLong = 0x00;
                 status =  get_message_queue_id_send( &queue_id );
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in CWF2 *** ERR get_message_queue_id_send %d\n", status)
                 }
                 BOOT_PRINTF("in CWF2 ***\n")
                         while(1){
                     // wait for an RTEMS_EVENT
                     rtems_event_receive( RTEMS_EVENT_MODE_NORM_S1_S2 | RTEMS_EVENT_MODE_BURST,
                                          RTEMS_WAIT | RTEMS_EVENT_ANY, RTEMS_NO_TIMEOUT, &event_out);
                     ring_node_to_send = getRingNodeToSendCWF( 2 );
                     if (event_out == RTEMS_EVENT_MODE_BURST)
                     {
                         status =  rtems_message_queue_send( queue_id, &ring_node_to_send, sizeof( ring_node* ) );
                     }
                     else if (event_out == RTEMS_EVENT_MODE_NORM_S1_S2)
                     {
                         if ( lfrCurrentMode == LFR_MODE_SBM2 )
                         {
                             status =  rtems_message_queue_send( queue_id, &ring_node_to_send, sizeof( ring_node* ) );
                         }
                         // launch snapshot extraction if needed
                         if (extractSWF2 == true)
                         {
                             ring_node_to_send_swf_f2 = ring_node_to_send_cwf_f2;
                             // extract the snapshot
                             build_snapshot_from_ring( ring_node_to_send_swf_f2, 2, acquisitionTimeF0_asLong,
                                                       &ring_node_swf2_extracted, swf2_extracted );
                             // send the snapshot when built
                             status = rtems_event_send( Task_id[TASKID_WFRM], RTEMS_EVENT_MODE_SBM2 );
                             extractSWF2 = false;
                             swf2_ready = true;
                         }
                         if (swf0_ready_flag_f2 == true)
                         {
                             extractSWF2 = true;
                             // record the acquition time of the f0 snapshot to use to build the snapshot at f2
                             acquisitionTimeF0_asLong = get_acquisition_time( (unsigned char *) &ring_node_to_send_swf_f0->coarseTime );
                             swf0_ready_flag_f2 = false;
                         }
                     }
                 }
             }
             rtems_task cwf1_task(rtems_task_argument argument)  // ONLY USED IN SBM1
             {
                 /** This RTEMS task is dedicated to the transmission of continuous waveforms at f1.
                  *
                  * @param unused is the starting argument of the RTEMS task
                  *
                  * The following data packet is sent by this function:
                  * - TM_LFR_SCIENCE_SBM1_CWF_F1
                  *
                  */
                 rtems_event_set event_out;
                 rtems_id queue_id;
                 rtems_status_code status;
                 ring_node *ring_node_to_send_cwf;
                 status =  get_message_queue_id_send( &queue_id );
                 if (status != RTEMS_SUCCESSFUL)
                 {
                     PRINTF1("in CWF1 *** ERR get_message_queue_id_send %d\n", status)
                 }
-                BOOT_PRINTF("in CWF1 ***\n")
+                BOOT_PRINTF("in CWF1 ***\n");
-                        while(1){
+                while(1){
                     // wait for an RTEMS_EVENT
                     rtems_event_receive( RTEMS_EVENT_MODE_NORM_S1_S2,
                                          RTEMS_WAIT | RTEMS_EVENT_ANY, RTEMS_NO_TIMEOUT, &event_out);
                     ring_node_to_send_cwf = getRingNodeToSendCWF( 1 );
                     ring_node_to_send_cwf_f1->sid = SID_SBM1_CWF_F1;
                     if (lfrCurrentMode == LFR_MODE_SBM1)
                     {
                         status =  rtems_message_queue_send( queue_id, &ring_node_to_send_cwf, sizeof( ring_node* ) );
                         if (status != 0)
                         {
                             PRINTF("cwf sending failed\n")
                         }
                     }
                     // launch snapshot extraction if needed
                     if (extractSWF1 == true)
                     {
                         ring_node_to_send_swf_f1 = ring_node_to_send_cwf;
                         // launch the snapshot extraction
                         status = rtems_event_send( Task_id[TASKID_SWBD], RTEMS_EVENT_MODE_NORM_S1_S2 );
                         extractSWF1 = false;
                     }
                     if (swf0_ready_flag_f1 == true)
                     {
                         extractSWF1 = true;
                         swf0_ready_flag_f1 = false;   // this step shall be executed only one time
                     }
                     if ((swf1_ready == true) && (swf2_ready == true))   // swf_f1 is ready after the extraction
                     {
                         status = rtems_event_send( Task_id[TASKID_WFRM], RTEMS_EVENT_MODE_NORMAL );
                         swf1_ready = false;
                         swf2_ready = false;
                     }
                 }
             }
             rtems_task swbd_task(rtems_task_argument argument)
             {
                 /** This RTEMS task is dedicated to the building of snapshots from different continuous waveforms buffers.
                  *
                  * @param unused is the starting argument of the RTEMS task
                  *
                  */
                 rtems_event_set event_out;
                 unsigned long long int acquisitionTimeF0_asLong;
                 acquisitionTimeF0_asLong = 0x00;
                 BOOT_PRINTF("in SWBD ***\n")
                         while(1){
                     // wait for an RTEMS_EVENT
                     rtems_event_receive( RTEMS_EVENT_MODE_NORM_S1_S2,
                                          RTEMS_WAIT | RTEMS_EVENT_ANY, RTEMS_NO_TIMEOUT, &event_out);
                     if (event_out == RTEMS_EVENT_MODE_NORM_S1_S2)
                     {
                         acquisitionTimeF0_asLong = get_acquisition_time( (unsigned char *) &ring_node_to_send_swf_f0->coarseTime );
                         build_snapshot_from_ring( ring_node_to_send_swf_f1, 1, acquisitionTimeF0_asLong,
                                                   &ring_node_swf1_extracted, swf1_extracted );
                         swf1_ready = true;    // the snapshot has been extracted and is ready to be sent
                     }
                     else
                     {
                         PRINTF1("in SWBD *** unexpected rtems event received %x\n", (int) event_out)
                     }
                 }
             }
             //******************
             // general functions
             void WFP_init_rings( void )
             {
                 // F0 RING
                 init_ring( waveform_ring_f0, NB_RING_NODES_F0, wf_buffer_f0, WFRM_BUFFER );
                 // F1 RING
                 init_ring( waveform_ring_f1, NB_RING_NODES_F1, wf_buffer_f1, WFRM_BUFFER );
                 // F2 RING
                 init_ring( waveform_ring_f2, NB_RING_NODES_F2, wf_buffer_f2, WFRM_BUFFER );
                 // F3 RING
                 init_ring( waveform_ring_f3, NB_RING_NODES_F3, wf_buffer_f3, WFRM_BUFFER );
                 ring_node_swf1_extracted.buffer_address = (int) swf1_extracted;
                 ring_node_swf2_extracted.buffer_address = (int) swf2_extracted;
                 DEBUG_PRINTF1("waveform_ring_f0 @%x\n", (unsigned int) waveform_ring_f0)
                         DEBUG_PRINTF1("waveform_ring_f1 @%x\n", (unsigned int) waveform_ring_f1)
                         DEBUG_PRINTF1("waveform_ring_f2 @%x\n", (unsigned int) waveform_ring_f2)
                         DEBUG_PRINTF1("waveform_ring_f3 @%x\n", (unsigned int) waveform_ring_f3)
                         DEBUG_PRINTF1("wf_buffer_f0 @%x\n", (unsigned int) wf_buffer_f0)
                         DEBUG_PRINTF1("wf_buffer_f1 @%x\n", (unsigned int) wf_buffer_f1)
                         DEBUG_PRINTF1("wf_buffer_f2 @%x\n", (unsigned int) wf_buffer_f2)
                         DEBUG_PRINTF1("wf_buffer_f3 @%x\n", (unsigned int) wf_buffer_f3)
             }
             void WFP_reset_current_ring_nodes( void )
             {
                 current_ring_node_f0      = waveform_ring_f0[0].next;
                 current_ring_node_f1      = waveform_ring_f1[0].next;
                 current_ring_node_f2      = waveform_ring_f2[0].next;
                 current_ring_node_f3      = waveform_ring_f3[0].next;
                 ring_node_to_send_swf_f0  = waveform_ring_f0;
                 ring_node_to_send_swf_f1  = waveform_ring_f1;
                 ring_node_to_send_swf_f2  = waveform_ring_f2;
                 ring_node_to_send_cwf_f1  = waveform_ring_f1;
                 ring_node_to_send_cwf_f2  = waveform_ring_f2;
                 ring_node_to_send_cwf_f3  = waveform_ring_f3;
             }
             int send_waveform_CWF3_light( ring_node *ring_node_to_send, ring_node *ring_node_cwf3_light, rtems_id queue_id )
             {
                 /** This function sends CWF_F3 CCSDS packets without the b1, b2 and b3 data.
                  *
                  * @param waveform points to the buffer containing the data that will be send.
                  * @param headerCWF points to a table of headers that have been prepared for the data transmission.
                  * @param queue_id is the id of the rtems queue to which spw_ioctl_pkt_send structures will be send. The structures
                  * contain information to setup the transmission of the data packets.
                  *
                  * By default, CWF_F3 packet are send without the b1, b2 and b3 data. This function rebuilds a data buffer
                  * from the incoming data and sends it in 7 packets, 6 containing 340 blocks and 1 one containing 8 blocks.
                  *
                  */
                 unsigned int i;
                 int ret;
                 rtems_status_code status;
                 char *sample;
                 int *dataPtr;
                 ret = LFR_DEFAULT;
                 dataPtr     = (int*) ring_node_to_send->buffer_address;
                 ring_node_cwf3_light->coarseTime = ring_node_to_send->coarseTime;
                 ring_node_cwf3_light->fineTime = ring_node_to_send->fineTime;
                 //**********************
                 // BUILD CWF3_light DATA
                 for ( i=0; i< NB_SAMPLES_PER_SNAPSHOT; i++)
                 {
                     sample = (char*) &dataPtr[ (i * NB_WORDS_SWF_BLK) ];
                     wf_cont_f3_light[ (i * NB_BYTES_CWF3_LIGHT_BLK)     ] = sample[ 0 ];
                     wf_cont_f3_light[ (i * NB_BYTES_CWF3_LIGHT_BLK) + 1 ] = sample[ 1 ];
                     wf_cont_f3_light[ (i * NB_BYTES_CWF3_LIGHT_BLK) + 2 ] = sample[ 2 ];
                     wf_cont_f3_light[ (i * NB_BYTES_CWF3_LIGHT_BLK) + 3 ] = sample[ 3 ];
                     wf_cont_f3_light[ (i * NB_BYTES_CWF3_LIGHT_BLK) + 4 ] = sample[ 4 ];
                     wf_cont_f3_light[ (i * NB_BYTES_CWF3_LIGHT_BLK) + 5 ] = sample[ 5 ];
                 }
                 // SEND PACKET
                 status =  rtems_message_queue_send( queue_id, &ring_node_cwf3_light, sizeof( ring_node* ) );
                 if (status != RTEMS_SUCCESSFUL) {
                     ret = LFR_DEFAULT;
                 }
                 return ret;
             }
             void compute_acquisition_time( unsigned int coarseTime, unsigned int fineTime,
                                            unsigned int sid, unsigned char pa_lfr_pkt_nr, unsigned char * acquisitionTime )
             {
                 unsigned long long int acquisitionTimeAsLong;
                 unsigned char localAcquisitionTime[6];
                 double deltaT;
                 deltaT = 0.;
                 localAcquisitionTime[0] = (unsigned char) ( coarseTime >> 24 );
                 localAcquisitionTime[1] = (unsigned char) ( coarseTime >> 16 );
                 localAcquisitionTime[2] = (unsigned char) ( coarseTime >> 8  );
                 localAcquisitionTime[3] = (unsigned char) ( coarseTime       );
                 localAcquisitionTime[4] = (unsigned char) ( fineTime   >> 8  );
                 localAcquisitionTime[5] = (unsigned char) ( fineTime         );
                 acquisitionTimeAsLong = ( (unsigned long long int) localAcquisitionTime[0] << 40 )
                         + ( (unsigned long long int) localAcquisitionTime[1] << 32 )
                         + ( (unsigned long long int) localAcquisitionTime[2] << 24 )
                         + ( (unsigned long long int) localAcquisitionTime[3] << 16 )
                         + ( (unsigned long long int) localAcquisitionTime[4] << 8  )
                         + ( (unsigned long long int) localAcquisitionTime[5]       );
                 switch( sid )
                 {
                 case SID_NORM_SWF_F0:
                     deltaT = ( (double ) (pa_lfr_pkt_nr) ) * BLK_NR_304 * 65536. / 24576. ;
                     break;
                 case SID_NORM_SWF_F1:
                     deltaT = ( (double ) (pa_lfr_pkt_nr) ) * BLK_NR_304 * 65536. / 4096. ;
                     break;
                 case SID_NORM_SWF_F2:
                     deltaT = ( (double ) (pa_lfr_pkt_nr) ) * BLK_NR_304 * 65536. / 256. ;
                     break;
                 case SID_SBM1_CWF_F1:
                     deltaT = ( (double ) (pa_lfr_pkt_nr) ) * BLK_NR_CWF * 65536. / 4096. ;
                     break;
                 case SID_SBM2_CWF_F2:
                     deltaT = ( (double ) (pa_lfr_pkt_nr) ) * BLK_NR_CWF * 65536. / 256. ;
                     break;
                 case SID_BURST_CWF_F2:
                     deltaT = ( (double ) (pa_lfr_pkt_nr) ) * BLK_NR_CWF * 65536. / 256. ;
                     break;
                 case SID_NORM_CWF_F3:
                     deltaT = ( (double ) (pa_lfr_pkt_nr) ) * BLK_NR_CWF_SHORT_F3 * 65536. / 16. ;
                     break;
                 case SID_NORM_CWF_LONG_F3:
                     deltaT = ( (double ) (pa_lfr_pkt_nr) ) * BLK_NR_CWF * 65536. / 16. ;
                     break;
                 default:
                     PRINTF1("in compute_acquisition_time *** ERR unexpected sid %d\n", sid)
                             deltaT = 0.;
                     break;
                 }
                 acquisitionTimeAsLong = acquisitionTimeAsLong + (unsigned long long int) deltaT;
                 //
                 acquisitionTime[0] = (unsigned char) (acquisitionTimeAsLong >> 40);
                 acquisitionTime[1] = (unsigned char) (acquisitionTimeAsLong >> 32);
                 acquisitionTime[2] = (unsigned char) (acquisitionTimeAsLong >> 24);
                 acquisitionTime[3] = (unsigned char) (acquisitionTimeAsLong >> 16);
                 acquisitionTime[4] = (unsigned char) (acquisitionTimeAsLong >> 8 );
                 acquisitionTime[5] = (unsigned char) (acquisitionTimeAsLong      );
             }
             void build_snapshot_from_ring( ring_node *ring_node_to_send,
                                            unsigned char frequencyChannel,
                                            unsigned long long int acquisitionTimeF0_asLong,
                                            ring_node *ring_node_swf_extracted,
                                            int *swf_extracted)
             {
                 unsigned int i;
                 unsigned long long int centerTime_asLong;
                 unsigned long long int acquisitionTime_asLong;
                 unsigned long long int bufferAcquisitionTime_asLong;
                 unsigned char *ptr1;
                 unsigned char *ptr2;
                 unsigned char *timeCharPtr;
                 unsigned char nb_ring_nodes;
                 unsigned long long int frequency_asLong;
                 unsigned long long int nbTicksPerSample_asLong;
                 unsigned long long int nbSamplesPart1_asLong;
                 unsigned long long int sampleOffset_asLong;
                 unsigned int deltaT_F0;
                 unsigned int deltaT_F1;
                 unsigned long long int deltaT_F2;
                 deltaT_F0 = 2731;      // (2048. / 24576. / 2.) * 65536. = 2730.667;
                 deltaT_F1 = 16384;  // (2048. / 4096.  / 2.) * 65536. = 16384;
                 deltaT_F2 = 262144; // (2048. / 256.   / 2.) * 65536. = 262144;
                 sampleOffset_asLong = 0x00;
                 // (1) get the f0 acquisition time => the value is passed in argument
                 // (2) compute the central reference time
                 centerTime_asLong = acquisitionTimeF0_asLong + deltaT_F0;
                 // (3) compute the acquisition time of the current snapshot
                 switch(frequencyChannel)
                 {
                 case 1: // 1 is for F1 = 4096 Hz
                     acquisitionTime_asLong = centerTime_asLong - deltaT_F1;
                     nb_ring_nodes = NB_RING_NODES_F1;
                     frequency_asLong = 4096;
                     nbTicksPerSample_asLong = 16;  // 65536 / 4096;
                     break;
                 case 2: // 2 is for F2 = 256 Hz
                     acquisitionTime_asLong = centerTime_asLong - deltaT_F2;
                     nb_ring_nodes = NB_RING_NODES_F2;
                     frequency_asLong = 256;
                     nbTicksPerSample_asLong = 256;  // 65536 / 256;
                     break;
                 default:
                     acquisitionTime_asLong = centerTime_asLong;
                     frequency_asLong = 256;
                     nbTicksPerSample_asLong = 256;
                     break;
                 }
                 //****************************************************************************
                 // (4) search the ring_node with the acquisition time <= acquisitionTime_asLong
                 for (i=0; i<nb_ring_nodes; i++)
                 {
                     //PRINTF1("%d ... ", i);
                             bufferAcquisitionTime_asLong = get_acquisition_time( (unsigned char *) &ring_node_to_send->coarseTime );
                     if (bufferAcquisitionTime_asLong <= acquisitionTime_asLong)
                     {
                         //PRINTF1("buffer found with acquisition time = %llx\n", bufferAcquisitionTime_asLong);
                                 break;
                     }
                     ring_node_to_send = ring_node_to_send->previous;
                 }
                 // (5) compute the number of samples to take in the current buffer
                 sampleOffset_asLong = ((acquisitionTime_asLong - bufferAcquisitionTime_asLong) * frequency_asLong ) >> 16;
                 nbSamplesPart1_asLong = NB_SAMPLES_PER_SNAPSHOT - sampleOffset_asLong;
                 //PRINTF2("sampleOffset_asLong = %lld, nbSamplesPart1_asLong = %lld\n", sampleOffset_asLong, nbSamplesPart1_asLong);
                         // (6) compute the final acquisition time
                         acquisitionTime_asLong = bufferAcquisitionTime_asLong +
                         sampleOffset_asLong * nbTicksPerSample_asLong;
                 // (7) copy the acquisition time at the beginning of the extrated snapshot
                 ptr1 = (unsigned char*) &acquisitionTime_asLong;
                 // fine time
                 ptr2 = (unsigned char*) &ring_node_swf_extracted->fineTime;
                 ptr2[2] = ptr1[ 4 + 2 ];
                 ptr2[3] = ptr1[ 5 + 2 ];
                 // coarse time
                 ptr2 = (unsigned char*) &ring_node_swf_extracted->coarseTime;
                 ptr2[0] = ptr1[ 0 + 2 ];
                 ptr2[1] = ptr1[ 1 + 2 ];
                 ptr2[2] = ptr1[ 2 + 2 ];
                 ptr2[3] = ptr1[ 3 + 2 ];
                 // re set the synchronization bit
                 timeCharPtr = (unsigned char*) &ring_node_to_send->coarseTime;
                 ptr2[0] = ptr2[0] | (timeCharPtr[0] & 0x80); // [1000 0000]
                 if ( (nbSamplesPart1_asLong >= NB_SAMPLES_PER_SNAPSHOT) | (nbSamplesPart1_asLong < 0) )
                 {
                     nbSamplesPart1_asLong = 0;
                 }
                 // copy the part 1 of the snapshot in the extracted buffer
                 for ( i = 0; i < (nbSamplesPart1_asLong * NB_WORDS_SWF_BLK); i++ )
                 {
                     swf_extracted[i] =
                             ((int*) ring_node_to_send->buffer_address)[ i + (sampleOffset_asLong * NB_WORDS_SWF_BLK) ];
                 }
                 // copy the part 2 of the snapshot in the extracted buffer
                 ring_node_to_send = ring_node_to_send->next;
                 for ( i = (nbSamplesPart1_asLong * NB_WORDS_SWF_BLK); i < (NB_SAMPLES_PER_SNAPSHOT * NB_WORDS_SWF_BLK); i++ )
                 {
                     swf_extracted[i] =
                             ((int*) ring_node_to_send->buffer_address)[ (i-(nbSamplesPart1_asLong * NB_WORDS_SWF_BLK)) ];
                 }
             }
             void snapshot_resynchronization( unsigned char *timePtr )
             {
                 unsigned long long int acquisitionTime;
                 unsigned long long int centerTime;
                 unsigned long long int previousTick;
                 unsigned long long int nextTick;
                 unsigned long long int deltaPreviousTick;
                 unsigned long long int deltaNextTick;
                 unsigned int deltaTickInF2;
                 double deltaPrevious_ms;
                 double deltaNext_ms;
                 // get acquisition time in fine time ticks
                 acquisitionTime = get_acquisition_time( timePtr );
                 // compute center time
                 centerTime = acquisitionTime + 2731;    // (2048. / 24576. / 2.) * 65536. = 2730.667;
                 previousTick = centerTime - (centerTime & 0xffff);
                 nextTick = previousTick + 65536;
                 deltaPreviousTick   = centerTime - previousTick;
                 deltaNextTick       = nextTick - centerTime;
                 deltaPrevious_ms    = ((double) deltaPreviousTick) / 65536. * 1000.;
                 deltaNext_ms        = ((double) deltaNextTick) / 65536. * 1000.;
                 PRINTF2("delta previous = %f ms, delta next = %f ms\n", deltaPrevious_ms, deltaNext_ms);
                 PRINTF2("delta previous = %llu fine time ticks, delta next = %llu fine time ticks\n", deltaPreviousTick, deltaNextTick);
                 // which tick is the closest
                 if (deltaPreviousTick > deltaNextTick)
                 {
-                    // deltaNext is in [ms]
+                    // the snapshot center is just before the second => increase delta_snapshot
-                    deltaTickInF2 = floor( (deltaNext_ms * 256. / 1000.) );
+                    deltaTickInF2 = ceil( (deltaNext_ms * 256. / 1000.) );
                     waveform_picker_regs->delta_snapshot = waveform_picker_regs->delta_snapshot + 1 * deltaTickInF2;
                     PRINTF2("correction of = + %u, delta_snapshot = %d\n", deltaTickInF2, waveform_picker_regs->delta_snapshot);
                 }
                 else
                 {
-                    // deltaPrevious is in [ms]
+                    // the snapshot center is just after the second => decrease delat_snapshot
-                    deltaTickInF2 = floor( (deltaPrevious_ms * 256. / 1000.) );
+                    deltaTickInF2 = ceil( (deltaPrevious_ms * 256. / 1000.) );
                     waveform_picker_regs->delta_snapshot = waveform_picker_regs->delta_snapshot - 1 * deltaTickInF2;
                     PRINTF2("correction of = - %u, delta_snapshot = %d\n", deltaTickInF2, waveform_picker_regs->delta_snapshot);
                 }
             }
             //**************
             // wfp registers
             void reset_wfp_burst_enable( void )
             {
                 /** This function resets the waveform picker burst_enable register.
                  *
                  * The burst bits [f2 f1 f0] and the enable bits [f3 f2 f1 f0] are set to 0.
                  *
                  */
                 // [1000 000] burst f2, f1, f0     enable f3, f2, f1, f0
                 waveform_picker_regs->run_burst_enable = waveform_picker_regs->run_burst_enable & 0x80;
             }
             void reset_wfp_status( void )
             {
                 /** This function resets the waveform picker status register.
                  *
                  * All status bits are set to 0 [new_err full_err full].
                  *
                  */
                 waveform_picker_regs->status = 0xffff;
             }
             void reset_wfp_buffer_addresses( void )
             {
                 // F0
                 waveform_picker_regs->addr_data_f0_0 = current_ring_node_f0->previous->buffer_address;  // 0x08
                 waveform_picker_regs->addr_data_f0_1 = current_ring_node_f0->buffer_address;            // 0x0c
                 // F1
                 waveform_picker_regs->addr_data_f1_0 = current_ring_node_f1->previous->buffer_address;  // 0x10
                 waveform_picker_regs->addr_data_f1_1 = current_ring_node_f1->buffer_address;            // 0x14
                 // F2
                 waveform_picker_regs->addr_data_f2_0 = current_ring_node_f2->previous->buffer_address;  // 0x18
                 waveform_picker_regs->addr_data_f2_1 = current_ring_node_f2->buffer_address;            // 0x1c
                 // F3
                 waveform_picker_regs->addr_data_f3_0 = current_ring_node_f3->previous->buffer_address;  // 0x20
                 waveform_picker_regs->addr_data_f3_1 = current_ring_node_f3->buffer_address;            // 0x24
             }
             void reset_waveform_picker_regs( void )
             {
                 /** This function resets the waveform picker module registers.
                 *
                 * The registers affected by this function are located at the following offset addresses:
                 * - 0x00 data_shaping
                 * - 0x04 run_burst_enable
                 * - 0x08 addr_data_f0
                 * - 0x0C addr_data_f1
                 * - 0x10 addr_data_f2
                 * - 0x14 addr_data_f3
                 * - 0x18 status
                 * - 0x1C delta_snapshot
                 * - 0x20 delta_f0
                 * - 0x24 delta_f0_2
                 * - 0x28 delta_f1
                 * - 0x2c delta_f2
                 * - 0x30 nb_data_by_buffer
                 * - 0x34 nb_snapshot_param
                 * - 0x38 start_date
                 * - 0x3c nb_word_in_buffer
                 *
                 */
                 set_wfp_data_shaping();                                     // 0x00 *** R1 R0 SP1 SP0 BW
                 reset_wfp_burst_enable();                                   // 0x04 *** [run *** burst f2, f1, f0 *** enable f3, f2, f1, f0 ]
                 reset_wfp_buffer_addresses();
                 reset_wfp_status();                                         // 0x18
                 set_wfp_delta_snapshot();   // 0x1c *** 300 s => 0x12bff
                 set_wfp_delta_f0_f0_2();    // 0x20, 0x24
                 set_wfp_delta_f1();         // 0x28
                 set_wfp_delta_f2();         // 0x2c
                 DEBUG_PRINTF1("delta_snapshot %x\n",    waveform_picker_regs->delta_snapshot)
                         DEBUG_PRINTF1("delta_f0 %x\n",          waveform_picker_regs->delta_f0)
                         DEBUG_PRINTF1("delta_f0_2 %x\n",        waveform_picker_regs->delta_f0_2)
                         DEBUG_PRINTF1("delta_f1 %x\n",          waveform_picker_regs->delta_f1)
                         DEBUG_PRINTF1("delta_f2 %x\n",          waveform_picker_regs->delta_f2)
                         // 2688 = 8 * 336
                         waveform_picker_regs->nb_data_by_buffer = 0xa7f; // 0x30 *** 2688 - 1 => nb samples -1
                 waveform_picker_regs->snapshot_param    = 0xa80; // 0x34 *** 2688 => nb samples
                 waveform_picker_regs->start_date        = 0x7fffffff;  // 0x38
                 //
                 // coarse time and fine time registers are not initialized, they are volatile
                 //
                 waveform_picker_regs->buffer_length     = 0x1f8;// buffer length in burst = 3 * 2688 / 16 = 504 = 0x1f8
             }
             void set_wfp_data_shaping( void )
             {
                 /** This function sets the data_shaping register of the waveform picker module.
                  *
                  * The value is read from one field of the parameter_dump_packet structure:\n
                  * bw_sp0_sp1_r0_r1
                  *
                  */
                 unsigned char data_shaping;
                 // get the parameters for the data shaping [BW SP0 SP1 R0 R1] in sy_lfr_common1 and configure the register
                 // waveform picker : [R1 R0 SP1 SP0 BW]
                 data_shaping = parameter_dump_packet.sy_lfr_common_parameters;
                 waveform_picker_regs->data_shaping =
                         ( (data_shaping & 0x20) >> 5 )     // BW
                         + ( (data_shaping & 0x10) >> 3 )     // SP0
                         + ( (data_shaping & 0x08) >> 1 )     // SP1
                         + ( (data_shaping & 0x04) << 1 )     // R0
                         + ( (data_shaping & 0x02) << 3 )     // R1
                         + ( (data_shaping & 0x01) << 5 );    // R2
             }
             void set_wfp_burst_enable_register( unsigned char mode )
             {
                 /** This function sets the waveform picker burst_enable register depending on the mode.
                  *
                  * @param mode is the LFR mode to launch.
                  *
                  * The burst bits shall be before the enable bits.
                  *
                  */
                 // [0000 0000] burst f2, f1, f0 enable f3 f2 f1 f0
                 // the burst bits shall be set first, before the enable bits
                 switch(mode) {
                 case LFR_MODE_NORMAL:
                 case LFR_MODE_SBM1:
                 case LFR_MODE_SBM2:
                     waveform_picker_regs->run_burst_enable = 0x60;  // [0110 0000] enable f2 and f1 burst
                     waveform_picker_regs->run_burst_enable = waveform_picker_regs->run_burst_enable | 0x0f; // [1111] enable f3 f2 f1 f0
                     break;
                 case LFR_MODE_BURST:
                     waveform_picker_regs->run_burst_enable = 0x40;  // [0100 0000] f2 burst enabled
                     waveform_picker_regs->run_burst_enable = waveform_picker_regs->run_burst_enable | 0x0c; // [1100] enable f3 and f2
                     break;
                 default:
                     waveform_picker_regs->run_burst_enable = 0x00;  // [0000 0000] no burst enabled, no waveform enabled
                     break;
                 }
             }
             void set_wfp_delta_snapshot( void )
             {
                 /** This function sets the delta_snapshot register of the waveform picker module.
                  *
                  * The value is read from two (unsigned char) of the parameter_dump_packet structure:
                  * - sy_lfr_n_swf_p[0]
                  * - sy_lfr_n_swf_p[1]
                  *
                  */
                 unsigned int delta_snapshot;
                 unsigned int delta_snapshot_in_T2;
                 delta_snapshot = parameter_dump_packet.sy_lfr_n_swf_p[0]*256
                         + parameter_dump_packet.sy_lfr_n_swf_p[1];
                 delta_snapshot_in_T2 = delta_snapshot * 256;
                 waveform_picker_regs->delta_snapshot = delta_snapshot_in_T2 - 1;    // max 4 bytes
             }
             void set_wfp_delta_f0_f0_2( void )
             {
                 unsigned int delta_snapshot;
                 unsigned int nb_samples_per_snapshot;
                 float delta_f0_in_float;
                 delta_snapshot = waveform_picker_regs->delta_snapshot;
                 nb_samples_per_snapshot = parameter_dump_packet.sy_lfr_n_swf_l[0] * 256 + parameter_dump_packet.sy_lfr_n_swf_l[1];
                 delta_f0_in_float =nb_samples_per_snapshot / 2. * ( 1. / 256. - 1. / 24576.) * 256.;
                 waveform_picker_regs->delta_f0      =  delta_snapshot - floor( delta_f0_in_float );
                 waveform_picker_regs->delta_f0_2    = 0x30;         // 48 = 11 0000, max 7 bits
             }
             void set_wfp_delta_f1( void )
             {
                 unsigned int delta_snapshot;
                 unsigned int nb_samples_per_snapshot;
                 float delta_f1_in_float;
                 delta_snapshot = waveform_picker_regs->delta_snapshot;
                 nb_samples_per_snapshot = parameter_dump_packet.sy_lfr_n_swf_l[0] * 256 + parameter_dump_packet.sy_lfr_n_swf_l[1];
                 delta_f1_in_float = nb_samples_per_snapshot / 2. * ( 1. / 256. - 1. / 4096.) * 256.;
                 waveform_picker_regs->delta_f1 = delta_snapshot - floor( delta_f1_in_float );
             }
             void set_wfp_delta_f2()
             {
                 unsigned int delta_snapshot;
                 unsigned int nb_samples_per_snapshot;
                 delta_snapshot = waveform_picker_regs->delta_snapshot;
                 nb_samples_per_snapshot = parameter_dump_packet.sy_lfr_n_swf_l[0] * 256 + parameter_dump_packet.sy_lfr_n_swf_l[1];
                 waveform_picker_regs->delta_f2 = delta_snapshot - nb_samples_per_snapshot / 2;
             }
             //*****************
             // local parameters
             void increment_seq_counter_source_id( unsigned char *packet_sequence_control, unsigned int sid )
             {
                 /** This function increments the parameter "sequence_cnt" depending on the sid passed in argument.
                  *
                  * @param packet_sequence_control is a pointer toward the parameter sequence_cnt to update.
                  * @param sid is the source identifier of the packet being updated.
                  *
                  * REQ-LFR-SRS-5240 / SSS-CP-FS-590
                  * The sequence counters shall wrap around from 2^14 to zero.
                  * The sequence counter shall start at zero at startup.
                  *
                  * REQ-LFR-SRS-5239 / SSS-CP-FS-580
                  * All TM_LFR_SCIENCE_ packets are sent to ground, i.e. destination id = 0
                  *
                  */
                 unsigned short *sequence_cnt;
                 unsigned short segmentation_grouping_flag;
                 unsigned short new_packet_sequence_control;
                 rtems_mode initial_mode_set;
                 rtems_mode current_mode_set;
                 rtems_status_code status;
                 //******************************************
                 // CHANGE THE MODE OF THE CALLING RTEMS TASK
                 status =  rtems_task_mode( RTEMS_NO_PREEMPT, RTEMS_PREEMPT_MASK, &initial_mode_set );
                 if ( (sid == SID_NORM_SWF_F0)    || (sid == SID_NORM_SWF_F1) || (sid == SID_NORM_SWF_F2)
                      || (sid == SID_NORM_CWF_F3) || (sid == SID_NORM_CWF_LONG_F3)
                      || (sid == SID_BURST_CWF_F2)
                      || (sid == SID_NORM_ASM_F0) || (sid == SID_NORM_ASM_F1) || (sid == SID_NORM_ASM_F2)
                      || (sid == SID_NORM_BP1_F0) || (sid == SID_NORM_BP1_F1) || (sid == SID_NORM_BP1_F2)
                      || (sid == SID_NORM_BP2_F0) || (sid == SID_NORM_BP2_F1) || (sid == SID_NORM_BP2_F2)
                      || (sid == SID_BURST_BP1_F0) || (sid == SID_BURST_BP2_F0)
                      || (sid == SID_BURST_BP1_F1) || (sid == SID_BURST_BP2_F1) )
                 {
                     sequence_cnt = (unsigned short *) &sequenceCounters_SCIENCE_NORMAL_BURST;
                 }
                 else if ( (sid ==SID_SBM1_CWF_F1) || (sid ==SID_SBM2_CWF_F2)
                           || (sid == SID_SBM1_BP1_F0) || (sid == SID_SBM1_BP2_F0)
                           || (sid == SID_SBM2_BP1_F0) || (sid == SID_SBM2_BP2_F0)
                           || (sid == SID_SBM2_BP1_F1) || (sid == SID_SBM2_BP2_F1) )
                 {
                     sequence_cnt = (unsigned short *) &sequenceCounters_SCIENCE_SBM1_SBM2;
                 }
                 else
                 {
                     sequence_cnt = (unsigned short *) NULL;
                     PRINTF1("in increment_seq_counter_source_id *** ERR apid_destid %d not known\n", sid)
                 }
                 if (sequence_cnt != NULL)
                 {
                     segmentation_grouping_flag  = TM_PACKET_SEQ_CTRL_STANDALONE << 8;
                     *sequence_cnt                = (*sequence_cnt) & 0x3fff;
                     new_packet_sequence_control = segmentation_grouping_flag | (*sequence_cnt) ;
                     packet_sequence_control[0] = (unsigned char) (new_packet_sequence_control >> 8);
                     packet_sequence_control[1] = (unsigned char) (new_packet_sequence_control     );
                     // increment the sequence counter
                     if ( *sequence_cnt < SEQ_CNT_MAX)
                     {
                         *sequence_cnt = *sequence_cnt + 1;
                     }
                     else
                     {
                         *sequence_cnt = 0;
                     }
                 }
                 //*************************************
                 // RESTORE THE MODE OF THE CALLING TASK
                 status =  rtems_task_mode( initial_mode_set, RTEMS_PREEMPT_MASK, &current_mode_set );
             }

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