LPP » INSTRU » VHDLib

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h1. IP Documentation

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h2. General Purpose

h3. Edge Detection

{{collapse(Edge_Detection)

EdgeDetection permit to detect the edge of the sin signal.

p=. !{width: 20%}edge_detection.png! 

<pre><code class="vhdl">

  COMPONENT lpp_edge_detection

    PORT (

      clk  : IN  STD_LOGIC;

      rstn : IN  STD_LOGIC;

      sin  : IN  STD_LOGIC;

      sout : OUT STD_LOGIC);

  END COMPONENT;

</code></pre>

|_.Signal      |_.Direction    |_.Size  |_.Function              |_. Active   |

|clk           |input          |1       |clock domain 1          |rising edge |

|rstn          |input          |1       |reset                   |low         |

|sin           |input          |1       |signal in               |            |

|sout          |ouput          |1       |signal out              |            |

}}

{{collapse(Edge_to_level)

EdgeToLevel permit to transform the positive edge information into a level information.

p=. !{width: 20%}edge_to_level.png! 

<pre><code class="vhdl">

  COMPONENT lpp_edge_to_level

    PORT (

      clk  : IN  STD_LOGIC;

      rstn : IN  STD_LOGIC;

      sin  : IN  STD_LOGIC;

      sout : OUT STD_LOGIC);

  END COMPONENT;

</code></pre>

|_.Signal      |_.Direction    |_.Size  |_.Function              |_. Active   |

|clk           |input          |1       |clock domain 1          |rising edge |

|rstn          |input          |1       |reset                   |low         |

|sin           |input          |1       |signal in               |            |

|sout          |ouput          |1       |signal out              |            |

}}

h3. Synchronizer

{{collapse(SYNC_FF)

Sync_FF permit to synchronize a signal A in the clock domain clk. Normally, A signal should be the output of a FF cloked in an other domain. You shouldtn't have "logic" between the 2 domain.

You can configure the number FF use to synchronize (NB_FF_OF_SYNC). This number is depending of the MTBF(Mean Time Between Failure).

p=. !{width: 15%}SYNC_FF.png!

<pre><code class="vhdl">

  COMPONENT SYNC_FF_LPP_JCP

    GENERIC (

      NB_FF_OF_SYNC : INTEGER);

    PORT (

      clk    : IN  STD_LOGIC;

      rstn   : IN  STD_LOGIC;

      A      : IN  STD_LOGIC;

      A_sync : OUT STD_LOGIC);

  END COMPONENT;

</code></pre>

|_.Parameter   |_.Type         |_.Size  |_.Description         |_.Default   |

|NB_FF_OF_SYNC |Integer        |        |Number of FF          |2            |

|\5.|

|_.Signal      |_.Direction    |_.Size  |_.Function            |_. Active   |

|clk           |input          |1       |clock                 |rising edge |

|rstn          |input          |1       |reset                 |low         |

|sin           |input          |1       |signal in             |            |

|sout          |ouput          |1       |signal synchronized   |            |

}}

{{collapse(SYNC_VALID_BIT)

SYNC_VALID_BIT permit to synchronize a signal of validity from clock domain clk_in to clock domain clk_out. A validity bit is a signal set "high" only one cycle and zero others. To Synchronize this type of signal, a first stage detect the positive edge, a second synchronizes this signal, and a last transform the edge information to a validity bit.

You can configure the FF number of the second stage (NB_FF_OF_SYNC).

p=. !{width: 20%}SYNC_VALID_BIT.png! 

<pre><code class="vhdl">

  COMPONENT SYNC_VALID_BIT_LPP_JCP

    GENERIC (

      NB_FF_OF_SYNC : INTEGER);

    PORT (

      clk_in  : IN  STD_LOGIC;

      clk_out : IN  STD_LOGIC;

      rstn    : IN  STD_LOGIC;

      sin     : IN  STD_LOGIC;

      sout    : OUT STD_LOGIC);

  END COMPONENT;

</code></pre>

|_.Parameter   |_.Type         |_.Size  |_.Description         |_.Default   |

|NB_FF_OF_SYNC |Integer        |        |Number of FF          |2            |

|\5.|

|_.Signal      |_.Direction    |_.Size  |_.Function                   |_. Active   |

|clk_in        |input          |1       |clock domain 1               |rising edge |

|clk_out       |input          |1       |clock domain 1               |rising edge |

|rstn          |input          |1       |reset                        |low         |

|sin           |input          |1       |valid bit clocked in domain 1|            |

|sout          |output          |1      |valid bit clocked in domain 2|            |

}}

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h2. SoC (System On Chip)

{{collapse(Leon3_Soc)

Leon3_SoC is an IP which integrate all the basic IP for using a Leon3 System. This System is configurable :

* activate the DSU, AHB uart, APB UART, IRQ manager and timer manager

* activate the FPU and select the type of IP using for (netlist or rtl)

You can connect easily external AMBA IP. For example, if you have only one Leon3 and you want to add an AHB Master My_AHB_MST. You set NB_AHB_MASTER to 1 and connect My_AHB_MST_ahbmi signal to the input ahbi_m_ext and My_AHB_MST_ahbmo to ahbo_m_ext(1).

|_.Number            |_.NAME     |_.Enable Parameter |_.Address  |_.IRQ|

|\5=.AHB Master |

| 0 to NCPU-1        |leon3s     |                   |||

| NCPU+NB_AHBMASTER  |ahbuart    |ENABLE_AHB_UART    |||

|\5.|

|\5=.AHB Slave |

| 0                  |mctrl      |                   |0x00000000 |     |

| 1                  |apbctrl    |                   |0x80000000 |     |

| 2                  |dsu3       |ENABLE_DSU         |0x90000000 |0    |

|\5.|

|\5=.APB Slave |

| 0                  |mctrl      |                   |0x80000000 |     |

| 1                  |apbuart    |ENABLE_APB_UART    |0x80000100 |2    |

| 2                  |irqmp      |ENABLE_IRQMP       |0x80000200 |     |

| 3                  |gptimer    |ENABLE_GPT         |0x80000300 |8    |

| 4                  |ahbuart    |ENABLE_APB_UART    |0x80000400 |     |

p=. !{width: 40%}leon3_SoC.png! 

<pre><code class="vhdl">

  COMPONENT leon3_soc_LPP_JCP

    GENERIC (

      fabtech         : INTEGER;

      memtech         : INTEGER;

      padtech         : INTEGER;

      clktech         : INTEGER;

      disas           : INTEGER;

      dbguart         : INTEGER;

      pclow           : INTEGER;

      clk_freq        : INTEGER;

      NB_CPU          : INTEGER;

      ENABLE_FPU      : INTEGER;

      FPU_NETLIST     : INTEGER;

      ENABLE_DSU      : INTEGER;

      ENABLE_AHB_UART : INTEGER;

      ENABLE_APB_UART : INTEGER;

      ENABLE_IRQMP    : INTEGER;

      ENABLE_GPT      : INTEGER;

      NB_AHB_MASTER   : INTEGER;

      NB_AHB_SLAVE    : INTEGER;

      NB_APB_SLAVE    : INTEGER);

    PORT (

      clk        : IN    STD_ULOGIC;

      rstn       : IN    STD_ULOGIC;

      errorn     : OUT   STD_ULOGIC;

      ahbrxd     : IN    STD_ULOGIC;

      ahbtxd     : OUT   STD_ULOGIC;

      urxd1      : IN    STD_ULOGIC;

      utxd1      : OUT   STD_ULOGIC;

      address    : OUT   STD_LOGIC_VECTOR(19 DOWNTO 0);

      data       : INOUT STD_LOGIC_VECTOR(31 DOWNTO 0);

      nSRAM_BE0  : OUT   STD_LOGIC;

      nSRAM_BE1  : OUT   STD_LOGIC;

      nSRAM_BE2  : OUT   STD_LOGIC;

      nSRAM_BE3  : OUT   STD_LOGIC;

      nSRAM_WE   : OUT   STD_LOGIC;

      nSRAM_CE   : OUT   STD_LOGIC;

      nSRAM_OE   : OUT   STD_LOGIC;

      apbi_ext   : OUT   apb_slv_in_type;

      apbo_ext   : IN    soc_apb_slv_out_vector(NB_APB_SLAVE-1+5 DOWNTO 5);

      ahbi_s_ext : OUT   ahb_slv_in_type;

      ahbo_s_ext : IN    soc_ahb_slv_out_vector(NB_AHB_SLAVE-1+3 DOWNTO 3);

      ahbi_m_ext : OUT   AHB_Mst_In_Type;

      ahbo_m_ext : IN    soc_ahb_mst_out_vector(NB_AHB_MASTER-1+NB_CPU DOWNTO NB_CPU));

  END COMPONENT;

</code></pre>

|_.Parameter     |_.Type       |_.Size  |_.Description         |_.Default   |

|fabtech         | INTEGER     |        |Target technologie                      |apa3e       |

|memtech         | INTEGER     |        |Memory Target technologie                      |apa3e       |

|padtech         | INTEGER     |        |Pad Target technologie                      |inferred    |

|clktech         | INTEGER     |        |Clock target technologie                      |inferred    |

|disas           | INTEGER     |        |Activate the disassembler  |0           |

|dbguart         | INTEGER     |        |Activate debug uart                      |0           |

|pclow           | INTEGER     |        |                      |2           |

|clk_freq        | INTEGER     |        |Clock input frequency (in kHz)                      |25000       |

|NB_CPU          | INTEGER     |        |Number of Leon3                      |1           |

|ENABLE_FPU      | INTEGER     |        |Enable the FPU                      |1           |

|FPU_NETLIST     | INTEGER     |        |Select the FPU Used (1=> NetList, 0=> RTL)   |1           |

|ENABLE_DSU      | INTEGER     |        |Enable the Debug System Unit                      |1           |

|ENABLE_AHB_UART | INTEGER     |        |Enable AHB UART                      |1           |

|ENABLE_APB_UART | INTEGER     |        |Enable APB UART                      |1           |

|ENABLE_IRQMP    | INTEGER     |        |Enable irq manager                      |1           |

|ENABLE_GPT      | INTEGER     |        |Enable the timer                      |1           |

|NB_AHB_MASTER   | INTEGER     |        |Number of AHB Master outside the SoC                      |0           |

|NB_AHB_SLAVE    | INTEGER     |        |Number of AHB Slave outside the SoC                      |0           |

|NB_APB_SLAVE    | INTEGER     |        |Number of APB Slave outside the SoC                      |0           |

|\5.|

|_.Signal   |_.Direction    |_.Size or Type |_.Function                   |_. Active   |

|clk        | input         |1              |clock                        |rising edge |

|rstn       | input         |1              |reset                        |low         |

|errorn     | output        |1              |leon 3 error signal          |            |

|ahbrxd     | input         |1              |AHB uart Rx Signal           |            |

|ahbtxd     | output        |1              |AHB uart Tx Signal           |            |

|urxd1      | input         |1              |APB uart Rx Signal           |            |

|utxd1      | output        |1              |APB uart Tx Signal           |            |

|address    | output        |20             |SRam  Address                |            |

|data       | inout         |32             |SRam Data                    |            |

|nSRAM_BE0  | output        |1              |SRam bankEnable  0           |            |

|nSRAM_BE1  | output        |1              |SRam bankEnable  1           |            |

|nSRAM_BE2  | output        |1              |SRam bankEnable  2           |            |

|nSRAM_BE3  | output        |1              |SRam bankEnable  3           |            |

|nSRAM_WE   | output        |1              |SRam WriteEnable             |            |

|nSRAM_CE   | output        |1              |SRam ChipEnable                             |            |

|nSRAM_OE   | output        |1              |SRam OutputEnable                             |            |

|apbi_ext   | output        |apb_slv_in_type|APB Slave bus input signal                             |            |

|apbo_ext   | input         |NB_APB_SLAVE of apb_slv_out_type|APB Slave bus output signal                            |            |

|ahbi_s_ext | output        |ahb_slv_in_type|AHB Slave bus input signal                              |            |

|ahbo_s_ext | input         |NB_AHB_SLAVE of ahb_slv_out_type |AHB Slave bus output signal                            |            |

|ahbi_m_ext | output        |ahb_mst_In_Type|AHB Master bus input signal                             |            |

|ahbo_m_ext | input         |NB_AHB_MASTER of ahb_mst_out_type|AHB Master bus output signal                              |            |

}}

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h2. AMBA Peripherals

{{collapse(APB LFR Time Managment)

LFR Time management is a real time clock. The time is give by the coarse_time and fine_time value. The Time managment is like a big counter of 48b (coarse_time + fine_time). This big counter count each nb_wait_period of period clk49_152MHz.

The bit 0 of coarse_time is the second.

The Time mangment can be updated by register with the value into COARSE_TIME_LOAD. When a space_wire_tick or a CTRL.force_tick is asserted, the value into COARSE_TIME_LOAD is loaded in COARSE_TIME and the FINE_TIME is reset to 0.

|_.VENDOR_ID |TBD   |

|_.DEVICE_ID |TBD   |

|\2.|

|_.APB_ADDRESS |_.Register Name   |_.Access |_.Description                               |\2.*Field*        |_.Reset Value |

|/2.0x00       |/2. CTRL          |/2.RW    |/2.Control register                         |0    | force_tick  |/2.0x0        |

                                                                                         |31-1 | Unused      |

|0x04             | COARSE_TIME_LOAD |RW       |CoarseTime to load after the next "tick"    |31-0 | Coarse_time |0x800000000   |

|/2.0x08          |/2. COARSE_TIME      |/2.R        |Current CoarseTime                                                 |30-0 | Coarse_time |/2.              |

                                                     |Indicates if the current coarse_time is not "in phase" with the SPW|31   | Not_SPW     |              

|/2.0x0C       |/2. FINE_TIME     |/2.R     |/2.Current FineTime                         |15-0 | FineTime    |/2.        |

                                                                                         |31-16| Unused      |

<pre><code class="vhdl">

  COMPONENT apb_lfr_time_management_LPP_JCP IS

    GENERIC(

      pindex         : INTEGER := 0;

      paddr          : INTEGER := 0;

      pmask          : INTEGER := 16#fff#;

      pirq           : INTEGER := 0;

      nb_wait_period : INTEGER := 375

      );

    PORT (

      clk25MHz     : IN  STD_LOGIC;

      clk49_152MHz : IN  STD_LOGIC;

      resetn       : IN  STD_LOGIC;

      grspw_tick   : IN  STD_LOGIC;

      apbi         : IN  apb_slv_in_type;

      apbo         : OUT apb_slv_out_type;

      coarse_time  : OUT STD_LOGIC_VECTOR(31 DOWNTO 0);

      fine_time    : OUT STD_LOGIC_VECTOR(15 DOWNTO 0)

      );

  END COMPONENT;

</code></pre>

}}

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