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lpc17xx_emac.c
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 r18 /**
* @file : lpc17xx_emac.c
* @brief : Contains all functions support for Ethernet MAC firmware library on LPC17xx
* @version : 1.0
* @date : 02. Jun. 2009
* @author : HieuNguyen
**************************************************************************
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* products. This software is supplied "AS IS" without any warranties.
* NXP Semiconductors assumes no responsibility or liability for the
* use of the software, conveys no license or title under any patent,
* copyright, or mask work right to the product. NXP Semiconductors
* reserves the right to make changes in the software without
* notification. NXP Semiconductors also make no representation or
* warranty that such application will be suitable for the specified
* use without further testing or modification.
**********************************************************************/
/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup EMAC
* @{
*/
/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_emac.h"
#include "lpc17xx_clkpwr.h"
/* If this source file built with example, the LPC17xx FW library configuration
* file in each example directory ("lpc17xx_libcfg.h") must be included,
* otherwise the default FW library configuration file must be included instead
*/
#ifdef __BUILD_WITH_EXAMPLE__
#include "lpc17xx_libcfg.h"
#else
#include "lpc17xx_libcfg_default.h"
#endif /* __BUILD_WITH_EXAMPLE__ */
#ifdef _EMAC
/* Private Variables ---------------------------------------------------------- */
/** @defgroup EMAC_Private_Variables
* @{
*/
/* MII Mgmt Configuration register - Clock divider setting */
const uint8_t EMAC_clkdiv[] = { 4, 6, 8, 10, 14, 20, 28 };
/* EMAC local DMA Descriptors */
/** Rx Descriptor data array */
static RX_Desc Rx_Desc[EMAC_NUM_RX_FRAG];
/** Rx Status data array - Must be 8-Byte aligned */
#if defined ( __CC_ARM )
static __align(8) RX_Stat Rx_Stat[EMAC_NUM_RX_FRAG];
#elif defined ( __ICCARM__ )
#pragma data_alignment=8
static RX_Stat Rx_Stat[EMAC_NUM_RX_FRAG];
#elif defined ( __GNUC__ )
static __attribute__ ((aligned (8))) RX_Stat Rx_Stat[EMAC_NUM_RX_FRAG];
#endif
/** Tx Descriptor data array */
static TX_Desc Tx_Desc[EMAC_NUM_TX_FRAG];
/** Tx Status data array */
static TX_Stat Tx_Stat[EMAC_NUM_TX_FRAG];
/* EMAC local DMA buffers */
/** Rx buffer data */
static uint32_t rx_buf[EMAC_NUM_RX_FRAG][EMAC_ETH_MAX_FLEN>>2];
/** Tx buffer data */
static uint32_t tx_buf[EMAC_NUM_TX_FRAG][EMAC_ETH_MAX_FLEN>>2];
/* EMAC call-back function pointer data */
static EMAC_IntCBSType *_pfnIntCbDat[10];
/**
* @}
*/
/* Private Functions ---------------------------------------------------------- */
/** @defgroup EMAC_Private_Functions
* @{
*/
static void rx_descr_init (void);
static void tx_descr_init (void);
static int32_t write_PHY (uint32_t PhyReg, uint16_t Value);
static int32_t read_PHY (uint32_t PhyReg);
/*--------------------------- rx_descr_init ---------------------------------*/
/**
* @brief Initializes RX Descriptor
* @param[in] None
* @return None
*/
static void rx_descr_init (void)
{
/* Initialize Receive Descriptor and Status array. */
uint32_t i;
for (i = 0; i < EMAC_NUM_RX_FRAG; i++) {
Rx_Desc[i].Packet = (uint32_t)&rx_buf[i];
Rx_Desc[i].Ctrl = EMAC_RCTRL_INT | (EMAC_ETH_MAX_FLEN - 1);
Rx_Stat[i].Info = 0;
Rx_Stat[i].HashCRC = 0;
}
/* Set EMAC Receive Descriptor Registers. */
LPC_EMAC->RxDescriptor = (uint32_t)&Rx_Desc[0];
LPC_EMAC->RxStatus = (uint32_t)&Rx_Stat[0];
LPC_EMAC->RxDescriptorNumber = EMAC_NUM_RX_FRAG - 1;
/* Rx Descriptors Point to 0 */
LPC_EMAC->RxConsumeIndex = 0;
}
/*--------------------------- tx_descr_init ---- ----------------------------*/
/**
* @brief Initializes TX Descriptor
* @param[in] None
* @return None
*/
static void tx_descr_init (void) {
/* Initialize Transmit Descriptor and Status array. */
uint32_t i;
for (i = 0; i < EMAC_NUM_TX_FRAG; i++) {
Tx_Desc[i].Packet = (uint32_t)&tx_buf[i];
Tx_Desc[i].Ctrl = 0;
Tx_Stat[i].Info = 0;
}
/* Set EMAC Transmit Descriptor Registers. */
LPC_EMAC->TxDescriptor = (uint32_t)&Tx_Desc[0];
LPC_EMAC->TxStatus = (uint32_t)&Tx_Stat[0];
LPC_EMAC->TxDescriptorNumber = EMAC_NUM_TX_FRAG - 1;
/* Tx Descriptors Point to 0 */
LPC_EMAC->TxProduceIndex = 0;
}
/*--------------------------- write_PHY -------------------------------------*/
/**
* @brief Write value to PHY device
* @param[in] PhyReg PHY Register address
* @param[in] Value Value to write
* @return (0) if sucess, otherwise return (-1)
*/
static int32_t write_PHY (uint32_t PhyReg, uint16_t Value)
{
/* Write a data 'Value' to PHY register 'PhyReg'. */
uint32_t tout;
LPC_EMAC->MADR = EMAC_DP83848C_DEF_ADR | PhyReg;
LPC_EMAC->MWTD = Value;
/* Wait until operation completed */
tout = 0;
for (tout = 0; tout < EMAC_MII_WR_TOUT; tout++) {
if ((LPC_EMAC->MIND & EMAC_MIND_BUSY) == 0) {
return (0);
}
}
// Time out!
return (-1);
}
/*--------------------------- read_PHY --------------------------------------*/
/**
* @brief Read value from PHY device
* @param[in] PhyReg PHY Register address
* @return Return value if success, otherwise return (-1)
*/
static int32_t read_PHY (uint32_t PhyReg)
{
/* Read a PHY register 'PhyReg'. */
uint32_t tout;
LPC_EMAC->MADR = EMAC_DP83848C_DEF_ADR | PhyReg;
LPC_EMAC->MCMD = EMAC_MCMD_READ;
/* Wait until operation completed */
tout = 0;
for (tout = 0; tout < EMAC_MII_RD_TOUT; tout++) {
if ((LPC_EMAC->MIND & EMAC_MIND_BUSY) == 0) {
LPC_EMAC->MCMD = 0;
return (LPC_EMAC->MRDD);
}
}
// Time out!
return (-1);
}
/*********************************************************************//**
* @brief Set Station MAC address for EMAC module
* @param[in] abStationAddr Pointer to Station address that contains 6-bytes
* of MAC address (should be in order from MAC Address 1 to MAC Address 6)
* @return None
**********************************************************************/
void setEmacAddr(uint8_t abStationAddr[])
{
/* Set the Ethernet MAC Address registers */
LPC_EMAC->SA0 = ((uint32_t)abStationAddr[5] << 8) | (uint32_t)abStationAddr[4];
LPC_EMAC->SA1 = ((uint32_t)abStationAddr[3] << 8) | (uint32_t)abStationAddr[2];
LPC_EMAC->SA2 = ((uint32_t)abStationAddr[1] << 8) | (uint32_t)abStationAddr[0];
}
/**
* @}
*/
/* Public Functions ----------------------------------------------------------- */
/** @addtogroup EMAC_Public_Functions
* @{
*/
/*********************************************************************//**
* @brief Initializes the EMAC peripheral according to the specified
* parameters in the EMAC_ConfigStruct.
* @param[in] EMAC_ConfigStruct Pointer to a EMAC_CFG_Type structure
* that contains the configuration information for the
* specified EMAC peripheral.
* @return None
*
* Note: This function will initialize EMAC module according to procedure below:
* - Remove the soft reset condition from the MAC
* - Configure the PHY via the MIIM interface of the MAC
* - Select RMII mode
* - Configure the transmit and receive DMA engines, including the descriptor arrays
* - Configure the host registers (MAC1,MAC2 etc.) in the MAC
* - Enable the receive and transmit data paths
* In default state after initializing, only Rx Done and Tx Done interrupt are enabled,
* all remain interrupts are disabled
* (Ref. from LPC17xx UM)
**********************************************************************/
Status EMAC_Init(EMAC_CFG_Type *EMAC_ConfigStruct)
{
/* Initialize the EMAC Ethernet controller. */
int32_t regv,tout, tmp;
/* Set up clock and power for Ethernet module */
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCENET, ENABLE);
/* Reset all EMAC internal modules */
LPC_EMAC->MAC1 = EMAC_MAC1_RES_TX | EMAC_MAC1_RES_MCS_TX | EMAC_MAC1_RES_RX |
EMAC_MAC1_RES_MCS_RX | EMAC_MAC1_SIM_RES | EMAC_MAC1_SOFT_RES;
LPC_EMAC->Command = EMAC_CR_REG_RES | EMAC_CR_TX_RES | EMAC_CR_RX_RES | EMAC_CR_PASS_RUNT_FRM;
/* A short delay after reset. */
for (tout = 100; tout; tout--);
/* Initialize MAC control registers. */
LPC_EMAC->MAC1 = EMAC_MAC1_PASS_ALL;
LPC_EMAC->MAC2 = EMAC_MAC2_CRC_EN | EMAC_MAC2_PAD_EN;
LPC_EMAC->MAXF = EMAC_ETH_MAX_FLEN;
/*
* Find the clock that close to desired target clock
*/
tmp = SystemCoreClock / EMAC_MCFG_MII_MAXCLK;
for (tout = 0; tout < sizeof (EMAC_clkdiv); tout++){
if (EMAC_clkdiv[tout] >= tmp) break;
}
tout++;
// Write to MAC configuration register and reset
LPC_EMAC->MCFG = EMAC_MCFG_CLK_SEL(tout) | EMAC_MCFG_RES_MII;
// release reset
LPC_EMAC->MCFG &= ~(EMAC_MCFG_RES_MII);
LPC_EMAC->CLRT = EMAC_CLRT_DEF;
LPC_EMAC->IPGR = EMAC_IPGR_P2_DEF;
/* Enable Reduced MII interface. */
LPC_EMAC->Command = EMAC_CR_RMII | EMAC_CR_PASS_RUNT_FRM;
/* Reset Reduced MII Logic. */
LPC_EMAC->SUPP = EMAC_SUPP_RES_RMII;
for (tout = 100; tout; tout--);
LPC_EMAC->SUPP = 0;
/* Put the DP83848C in reset mode */
write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_BMCR_RESET);
/* Wait for hardware reset to end. */
for (tout = EMAC_PHY_RESP_TOUT; tout; tout--) {
regv = read_PHY (EMAC_PHY_REG_BMCR);
if (!(regv & (EMAC_PHY_BMCR_RESET | EMAC_PHY_BMCR_POWERDOWN))) {
/* Reset complete, device not Power Down. */
break;
}
if (tout == 0){
// Time out, return ERROR
return (ERROR);
}
}
// Set PHY mode
if (EMAC_SetPHYMode(EMAC_ConfigStruct->Mode) < 0){
return (ERROR);
}
// Set EMAC address
setEmacAddr(EMAC_ConfigStruct->pbEMAC_Addr);
/* Initialize Tx and Rx DMA Descriptors */
rx_descr_init ();
tx_descr_init ();
// Set Receive Filter register: enable broadcast and multicast
LPC_EMAC->RxFilterCtrl = EMAC_RFC_MCAST_EN | EMAC_RFC_BCAST_EN | EMAC_RFC_PERFECT_EN;
/* Enable Rx Done and Tx Done interrupt for EMAC */
LPC_EMAC->IntEnable = EMAC_INT_RX_DONE | EMAC_INT_TX_DONE;
/* Reset all interrupts */
LPC_EMAC->IntClear = 0xFFFF;
/* Enable receive and transmit mode of MAC Ethernet core */
LPC_EMAC->Command |= (EMAC_CR_RX_EN | EMAC_CR_TX_EN);
LPC_EMAC->MAC1 |= EMAC_MAC1_REC_EN;
return SUCCESS;
}
/*********************************************************************//**
* @brief De-initializes the EMAC peripheral registers to their
* default reset values.
* @param[in] None
* @return None
**********************************************************************/
void EMAC_DeInit(void)
{
// Disable all interrupt
LPC_EMAC->IntEnable = 0x00;
// Clear all pending interrupt
LPC_EMAC->IntClear = (0xFF) | (EMAC_INT_SOFT_INT | EMAC_INT_WAKEUP);
/* TurnOff clock and power for Ethernet module */
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCENET, DISABLE);
}
/*********************************************************************//**
* @brief Check specified PHY status in EMAC peripheral
* @param[in] ulPHYState Specified PHY Status Type, should be:
* - EMAC_PHY_STAT_LINK: Link Status
* - EMAC_PHY_STAT_SPEED: Speed Status
* - EMAC_PHY_STAT_DUP: Duplex Status
* @return Status of specified PHY status (0 or 1).
* (-1) if error.
*
* Note:
* For EMAC_PHY_STAT_LINK, return value:
* - 0: Link Down
* - 1: Link Up
* For EMAC_PHY_STAT_SPEED, return value:
* - 0: 10Mbps
* - 1: 100Mbps
* For EMAC_PHY_STAT_DUP, return value:
* - 0: Half-Duplex
* - 1: Full-Duplex
**********************************************************************/
int32_t EMAC_CheckPHYStatus(uint32_t ulPHYState)
{
int32_t regv, tmp;
regv = read_PHY (EMAC_PHY_REG_STS);
switch(ulPHYState){
case EMAC_PHY_STAT_LINK:
tmp = (regv & EMAC_PHY_SR_LINK) ? 1 : 0;
break;
case EMAC_PHY_STAT_SPEED:
tmp = (regv & EMAC_PHY_SR_SPEED) ? 0 : 1;
break;
case EMAC_PHY_STAT_DUP:
tmp = (regv & EMAC_PHY_SR_DUP) ? 1 : 0;
break;
default:
tmp = -1;
break;
}
return (tmp);
}
/*********************************************************************//**
* @brief Set specified PHY mode in EMAC peripheral
* @param[in] ulPHYMode Specified PHY mode, should be:
* - EMAC_MODE_AUTO
* - EMAC_MODE_10M_FULL
* - EMAC_MODE_10M_HALF
* - EMAC_MODE_100M_FULL
* - EMAC_MODE_100M_HALF
* @return Return (0) if no error, otherwise return (-1)
**********************************************************************/
int32_t EMAC_SetPHYMode(uint32_t ulPHYMode)
{
int32_t id1, id2, tout, regv;
/* Check if this is a DP83848C PHY. */
id1 = read_PHY (EMAC_PHY_REG_IDR1);
id2 = read_PHY (EMAC_PHY_REG_IDR2);
if (((id1 << 16) | (id2 & 0xFFF0)) == EMAC_DP83848C_ID) {
/* Configure the PHY device */
switch(ulPHYMode){
case EMAC_MODE_AUTO:
/* Use auto-negotiation about the link speed. */
write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_AUTO_NEG);
/* Wait to complete Auto_Negotiation */
for (tout = EMAC_PHY_RESP_TOUT; tout; tout--) {
regv = read_PHY (EMAC_PHY_REG_BMSR);
if (regv & EMAC_PHY_BMSR_AUTO_DONE) {
/* Auto-negotiation Complete. */
break;
}
if (tout == 0){
// Time out, return error
return (-1);
}
}
break;
case EMAC_MODE_10M_FULL:
/* Connect at 10MBit full-duplex */
write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_FULLD_10M);
break;
case EMAC_MODE_10M_HALF:
/* Connect at 10MBit half-duplex */
write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_HALFD_10M);
break;
case EMAC_MODE_100M_FULL:
/* Connect at 100MBit full-duplex */
write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_FULLD_100M);
break;
case EMAC_MODE_100M_HALF:
/* Connect at 100MBit half-duplex */
write_PHY (EMAC_PHY_REG_BMCR, EMAC_PHY_HALFD_100M);
break;
default:
// un-supported
return (-1);
}
}
// It's not correct module ID
else {
return (-1);
}
// Update EMAC configuration with current PHY status
if (EMAC_UpdatePHYStatus() < 0){
return (-1);
}
// Complete
return (0);
}
/*********************************************************************//**
* @brief Auto-Configures value for the EMAC configuration register to
* match with current PHY mode
* @param[in] None
* @return Return (0) if no error, otherwise return (-1)
*
* Note: The EMAC configuration will be auto-configured:
* - Speed mode.
* - Half/Full duplex mode
**********************************************************************/
int32_t EMAC_UpdatePHYStatus(void)
{
int32_t regv, tout;
/* Check the link status. */
for (tout = EMAC_PHY_RESP_TOUT; tout; tout--) {
regv = read_PHY (EMAC_PHY_REG_STS);
if (regv & EMAC_PHY_SR_LINK) {
/* Link is on. */
break;
}
if (tout == 0){
// time out
return (-1);
}
}
/* Configure Full/Half Duplex mode. */
if (regv & EMAC_PHY_SR_DUP) {
/* Full duplex is enabled. */
LPC_EMAC->MAC2 |= EMAC_MAC2_FULL_DUP;
LPC_EMAC->Command |= EMAC_CR_FULL_DUP;
LPC_EMAC->IPGT = EMAC_IPGT_FULL_DUP;
} else {
/* Half duplex mode. */
LPC_EMAC->IPGT = EMAC_IPGT_HALF_DUP;
}
/* Configure 100MBit/10MBit mode. */
if (regv & EMAC_PHY_SR_SPEED) {
/* 10MBit mode. */
LPC_EMAC->SUPP = 0;
} else {
/* 100MBit mode. */
LPC_EMAC->SUPP = EMAC_SUPP_SPEED;
}
// Complete
return (0);
}
/*********************************************************************//**
* @brief Enable/Disable hash filter functionality for specified destination
* MAC address in EMAC module
* @param[in] dstMAC_addr Pointer to the first MAC destination address, should
* be 6-bytes length, in order LSB to the MSB
* @param[in] NewState New State of this command, should be:
* - ENABLE.
* - DISABLE.
* @return None
*
* Note:
* The standard Ethernet cyclic redundancy check (CRC) function is calculated from
* the 6 byte destination address in the Ethernet frame (this CRC is calculated
* anyway as part of calculating the CRC of the whole frame), then bits [28:23] out of
* the 32 bits CRC result are taken to form the hash. The 6 bit hash is used to access
* the hash table: it is used as an index in the 64 bit HashFilter register that has been
* programmed with accept values. If the selected accept value is 1, the frame is
* accepted.
**********************************************************************/
void EMAC_SetHashFilter(uint8_t dstMAC_addr[], FunctionalState NewState)
{
uint32_t *pReg;
uint32_t tmp;
int32_t crc;
// Calculate the CRC from the destination MAC address
crc = EMAC_CRCCalc(dstMAC_addr, 6);
// Extract the value from CRC to get index value for hash filter table
crc = (crc >> 23) & 0x3F;
pReg = (crc > 31) ? ((uint32_t *)&LPC_EMAC->HashFilterH) \
: ((uint32_t *)&LPC_EMAC->HashFilterL);
tmp = (crc > 31) ? (crc - 32) : crc;
if (NewState == ENABLE) {
(*pReg) |= (1UL << tmp);
} else {
(*pReg) &= ~(1UL << tmp);
}
// Enable Rx Filter
LPC_EMAC->Command &= ~EMAC_CR_PASS_RX_FILT;
}
/*********************************************************************//**
* @brief Calculates CRC code for number of bytes in the frame
* @param[in] frame_no_fcs Pointer to the first byte of the frame
* @param[in] frame_len length of the frame without the FCS
* @return the CRC as a 32 bit integer
**********************************************************************/
int32_t EMAC_CRCCalc(uint8_t frame_no_fcs[], int32_t frame_len)
{
int i; // iterator
int j; // another iterator
char byte; // current byte
int crc; // CRC result
int q0, q1, q2, q3; // temporary variables
crc = 0xFFFFFFFF;
for (i = 0; i < frame_len; i++) {
byte = *frame_no_fcs++;
for (j = 0; j < 2; j++) {
if (((crc >> 28) ^ (byte >> 3)) & 0x00000001) {
q3 = 0x04C11DB7;
} else {
q3 = 0x00000000;
}
if (((crc >> 29) ^ (byte >> 2)) & 0x00000001) {
q2 = 0x09823B6E;
} else {
q2 = 0x00000000;
}
if (((crc >> 30) ^ (byte >> 1)) & 0x00000001) {
q1 = 0x130476DC;
} else {
q1 = 0x00000000;
}
if (((crc >> 31) ^ (byte >> 0)) & 0x00000001) {
q0 = 0x2608EDB8;
} else {
q0 = 0x00000000;
}
crc = (crc << 4) ^ q3 ^ q2 ^ q1 ^ q0;
byte >>= 4;
}
}
return crc;
}
/*********************************************************************//**
* @brief Enable/Disable Filter mode for each specified type EMAC peripheral
* @param[in] ulFilterMode Filter mode, should be:
* - EMAC_RFC_UCAST_EN: all frames of unicast types
* will be accepted
* - EMAC_RFC_BCAST_EN: broadcast frame will be
* accepted
* - EMAC_RFC_MCAST_EN: all frames of multicast
* types will be accepted
* - EMAC_RFC_UCAST_HASH_EN: The imperfect hash
* filter will be applied to unicast addresses
* - EMAC_RFC_MCAST_HASH_EN: The imperfect hash
* filter will be applied to multicast addresses
* - EMAC_RFC_PERFECT_EN: the destination address
* will be compared with the 6 byte station address
* programmed in the station address by the filter
* - EMAC_RFC_MAGP_WOL_EN: the result of the magic
* packet filter will generate a WoL interrupt when
* there is a match
* - EMAC_RFC_PFILT_WOL_EN: the result of the perfect address
* matching filter and the imperfect hash filter will
* generate a WoL interrupt when there is a match
* @param[in] NewState New State of this command, should be:
* - ENABLE
* - DISABLE
* @return None
**********************************************************************/
void EMAC_SetFilterMode(uint32_t ulFilterMode, FunctionalState NewState)
{
if (NewState == ENABLE){
LPC_EMAC->RxFilterCtrl |= ulFilterMode;
} else {
LPC_EMAC->RxFilterCtrl &= ~ulFilterMode;
}
}
/*********************************************************************//**
* @brief Get status of Wake On LAN Filter for each specified
* type in EMAC peripheral, clear this status if it is set
* @param[in] ulWoLMode WoL Filter mode, should be:
* - EMAC_WOL_UCAST: unicast frames caused WoL
* - EMAC_WOL_UCAST: broadcast frame caused WoL
* - EMAC_WOL_MCAST: multicast frame caused WoL
* - EMAC_WOL_UCAST_HASH: unicast frame that passes the
* imperfect hash filter caused WoL
* - EMAC_WOL_MCAST_HASH: multicast frame that passes the
* imperfect hash filter caused WoL
* - EMAC_WOL_PERFECT:perfect address matching filter
* caused WoL
* - EMAC_WOL_RX_FILTER: the receive filter caused WoL
* - EMAC_WOL_MAG_PACKET: the magic packet filter caused WoL
* @return SET/RESET
**********************************************************************/
FlagStatus EMAC_GetWoLStatus(uint32_t ulWoLMode)
{
if (LPC_EMAC->RxFilterWoLStatus & ulWoLMode) {
LPC_EMAC->RxFilterWoLClear = ulWoLMode;
return SET;
} else {
return RESET;
}
}
/*********************************************************************//**
* @brief Write data to Tx packet data buffer at current index due to
* TxProduceIndex
* @param[in] pDataStruct Pointer to a EMAC_PACKETBUF_Type structure
* data that contain specified information about
* Packet data buffer.
* @return None
**********************************************************************/
void EMAC_WritePacketBuffer(EMAC_PACKETBUF_Type *pDataStruct)
{
uint32_t idx,len;
uint32_t *sp,*dp;
idx = LPC_EMAC->TxProduceIndex;
sp = (uint32_t *)pDataStruct->pbDataBuf;
dp = (uint32_t *)Tx_Desc[idx].Packet;
/* Copy frame data to EMAC packet buffers. */
for (len = (pDataStruct->ulDataLen + 3) >> 2; len; len--) {
*dp++ = *sp++;
}
Tx_Desc[idx].Ctrl = (pDataStruct->ulDataLen - 1) | (EMAC_TCTRL_INT | EMAC_TCTRL_LAST);
}
/*********************************************************************//**
* @brief Read data from Rx packet data buffer at current index due
* to RxConsumeIndex
* @param[in] pDataStruct Pointer to a EMAC_PACKETBUF_Type structure
* data that contain specified information about
* Packet data buffer.
* @return None
**********************************************************************/
void EMAC_ReadPacketBuffer(EMAC_PACKETBUF_Type *pDataStruct)
{
uint32_t idx, len;
uint32_t *dp, *sp;
idx = LPC_EMAC->RxConsumeIndex;
dp = (uint32_t *)pDataStruct->pbDataBuf;
sp = (uint32_t *)Rx_Desc[idx].Packet;
if (pDataStruct->pbDataBuf != NULL) {
for (len = (pDataStruct->ulDataLen + 3) >> 2; len; len--) {
*dp++ = *sp++;
}
}
}
/*********************************************************************//**
* @brief Standard EMAC IRQ Handler. This sub-routine will check
* these following interrupt and call the call-back function
* if they're already installed:
* - Overrun Error interrupt in RX Queue
* - Receive Error interrupt: AlignmentError, RangeError,
* LengthError, SymbolError, CRCError or NoDescriptor or Overrun
* - RX Finished Process Descriptors interrupt (ProduceIndex == ConsumeIndex)
* - Receive Done interrupt
* - Transmit Under-run interrupt
* - Transmit errors interrupt : LateCollision, ExcessiveCollision
* and ExcessiveDefer, NoDescriptor or Under-run
* - TX Finished Process Descriptors interrupt (ProduceIndex == ConsumeIndex)
* - Transmit Done interrupt
* - Interrupt triggered by software
* - Interrupt triggered by a Wakeup event detected by the receive filter
* @param[in] None
* @return None
**********************************************************************/
void EMAC_StandardIRQHandler(void)
{
/* EMAC Ethernet Controller Interrupt function. */
uint32_t n, int_stat;
// Get EMAC interrupt status
while ((int_stat = (LPC_EMAC->IntStatus & LPC_EMAC->IntEnable)) != 0) {
// Clear interrupt status
LPC_EMAC->IntClear = int_stat;
// Execute call-back function
for (n = 0; n <= 7; n++) {
if ((int_stat & (1 << n)) && (_pfnIntCbDat[n] != NULL)) {
_pfnIntCbDat[n]();
}
}
// Soft interrupt
if ((int_stat & EMAC_INT_SOFT_INT) && (_pfnIntCbDat[8] != NULL)) {
_pfnIntCbDat[8]();
}
// WakeUp interrupt
if ((int_stat & EMAC_INT_WAKEUP) && (_pfnIntCbDat[9] != NULL)) {
// Clear WoL interrupt
LPC_EMAC->RxFilterWoLClear = EMAC_WOL_BITMASK;
_pfnIntCbDat[9]();
}
}
}
/*********************************************************************//**
* @brief Setup/register Call-back function for each interrupt type
* in EMAC module.
* @param[in] ulIntType Interrupt type, should be one of the following:
* - EMAC_INT_RX_OVERRUN: Receive Overrun
* - EMAC_INT_RX_ERR: Receive Error
* - EMAC_INT_RX_FIN: Receive Descriptor Finish
* - EMAC_INT_RX_DONE: Receive Done
* - EMAC_INT_TX_UNDERRUN: Transmit Under-run
* - EMAC_INT_TX_ERR: Transmit Error
* - EMAC_INT_TX_FIN: Transmit descriptor finish
* - EMAC_INT_TX_DONE: Transmit Done
* - EMAC_INT_SOFT_INT: Software interrupt
* - EMAC_INT_WAKEUP: Wakeup interrupt
* @param[in] pfnIntCb Pointer to Call-back function used for this
* interrupt type
* @return None
**********************************************************************/
void EMAC_SetupIntCBS(uint32_t ulIntType, EMAC_IntCBSType *pfnIntCb)
{
/* EMAC Ethernet Controller Interrupt function. */
uint32_t n;
if (ulIntType <= EMAC_INT_TX_DONE){
for (n = 0; n <= 7; n++) {
// Found it, install cbs now
if (ulIntType & (1 << n)) {
_pfnIntCbDat[n] = pfnIntCb;
// Don't install cbs any more
break;
}
}
} else if (ulIntType & EMAC_INT_SOFT_INT) {
_pfnIntCbDat[8] = pfnIntCb;
} else if (ulIntType & EMAC_INT_WAKEUP) {
_pfnIntCbDat[9] = pfnIntCb;
}
}
/*********************************************************************//**
* @brief Enable/Disable interrupt for each type in EMAC
* @param[in] ulIntType Interrupt Type, should be:
* - EMAC_INT_RX_OVERRUN: Receive Overrun
* - EMAC_INT_RX_ERR: Receive Error
* - EMAC_INT_RX_FIN: Receive Descriptor Finish
* - EMAC_INT_RX_DONE: Receive Done
* - EMAC_INT_TX_UNDERRUN: Transmit Under-run
* - EMAC_INT_TX_ERR: Transmit Error
* - EMAC_INT_TX_FIN: Transmit descriptor finish
* - EMAC_INT_TX_DONE: Transmit Done
* - EMAC_INT_SOFT_INT: Software interrupt
* - EMAC_INT_WAKEUP: Wakeup interrupt
* @param[in] NewState New State of this function, should be:
* - ENABLE.
* - DISABLE.
* @return None
**********************************************************************/
void EMAC_IntCmd(uint32_t ulIntType, FunctionalState NewState)
{
if (NewState == ENABLE) {
LPC_EMAC->IntEnable |= ulIntType;
} else {
LPC_EMAC->IntEnable &= ~(ulIntType);
}
}
/*********************************************************************//**
* @brief Check whether if specified interrupt flag is set or not
* for each interrupt type in EMAC and clear interrupt pending
* if it is set.
* @param[in] ulIntType Interrupt Type, should be:
* - EMAC_INT_RX_OVERRUN: Receive Overrun
* - EMAC_INT_RX_ERR: Receive Error
* - EMAC_INT_RX_FIN: Receive Descriptor Finish
* - EMAC_INT_RX_DONE: Receive Done
* - EMAC_INT_TX_UNDERRUN: Transmit Under-run
* - EMAC_INT_TX_ERR: Transmit Error
* - EMAC_INT_TX_FIN: Transmit descriptor finish
* - EMAC_INT_TX_DONE: Transmit Done
* - EMAC_INT_SOFT_INT: Software interrupt
* - EMAC_INT_WAKEUP: Wakeup interrupt
* @return New state of specified interrupt (SET or RESET)
**********************************************************************/
IntStatus EMAC_IntGetStatus(uint32_t ulIntType)
{
if (LPC_EMAC->IntStatus & ulIntType) {
LPC_EMAC->IntClear = ulIntType;
return SET;
} else {
return RESET;
}
}
/*********************************************************************//**
* @brief Check whether if the current RxConsumeIndex is not equal to the
* current RxProduceIndex.
* @param[in] None
* @return TRUE if they're not equal, otherwise return FALSE
*
* Note: In case the RxConsumeIndex is not equal to the RxProduceIndex,
* it means there're available data has been received. They should be read
* out and released the Receive Data Buffer by updating the RxConsumeIndex value.
**********************************************************************/
Bool EMAC_CheckReceiveIndex(void)
{
if (LPC_EMAC->RxConsumeIndex != LPC_EMAC->RxProduceIndex) {
return TRUE;
} else {
return FALSE;
}
}
/*********************************************************************//**
* @brief Check whether if the current TxProduceIndex is not equal to the
* current RxProduceIndex - 1.
* @param[in] None
* @return TRUE if they're not equal, otherwise return FALSE
*
* Note: In case the RxConsumeIndex is equal to the RxProduceIndex - 1,
* it means the transmit buffer is available and data can be written to transmit
* buffer to be sent.
**********************************************************************/
Bool EMAC_CheckTransmitIndex(void)
{
uint32_t tmp = LPC_EMAC->TxConsumeIndex -1;
if (LPC_EMAC->TxProduceIndex == tmp) {
return FALSE;
} else {
return TRUE;
}
}
/*********************************************************************//**
* @brief Get current status value of receive data (due to RxConsumeIndex)
* @param[in] ulRxStatType Received Status type, should be one of following:
* - EMAC_RINFO_CTRL_FRAME: Control Frame
* - EMAC_RINFO_VLAN: VLAN Frame
* - EMAC_RINFO_FAIL_FILT: RX Filter Failed
* - EMAC_RINFO_MCAST: Multicast Frame
* - EMAC_RINFO_BCAST: Broadcast Frame
* - EMAC_RINFO_CRC_ERR: CRC Error in Frame
* - EMAC_RINFO_SYM_ERR: Symbol Error from PHY
* - EMAC_RINFO_LEN_ERR: Length Error
* - EMAC_RINFO_RANGE_ERR: Range error(exceeded max size)
* - EMAC_RINFO_ALIGN_ERR: Alignment error
* - EMAC_RINFO_OVERRUN: Receive overrun
* - EMAC_RINFO_NO_DESCR: No new Descriptor available
* - EMAC_RINFO_LAST_FLAG: last Fragment in Frame
* - EMAC_RINFO_ERR: Error Occurred (OR of all error)
* @return Current value of receive data (due to RxConsumeIndex)
**********************************************************************/
FlagStatus EMAC_CheckReceiveDataStatus(uint32_t ulRxStatType)
{
uint32_t idx;
idx = LPC_EMAC->RxConsumeIndex;
return (((Rx_Stat[idx].Info) & ulRxStatType) ? SET : RESET);
}
/*********************************************************************//**
* @brief Get size of current Received data in received buffer (due to
* RxConsumeIndex)
* @param[in] None
* @return Size of received data
**********************************************************************/
uint32_t EMAC_GetReceiveDataSize(void)
{
uint32_t idx;
idx =LPC_EMAC->RxConsumeIndex;
return ((Rx_Stat[idx].Info) & EMAC_RINFO_SIZE);
}
/*********************************************************************//**
* @brief Increase the RxConsumeIndex (after reading the Receive buffer
* to release the Receive buffer) and wrap-around the index if
* it reaches the maximum Receive Number
* @param[in] None
* @return None
**********************************************************************/
void EMAC_UpdateRxConsumeIndex(void)
{
// Get current Rx consume index
uint32_t idx = LPC_EMAC->RxConsumeIndex;
/* Release frame from EMAC buffer */
if (++idx == EMAC_NUM_RX_FRAG) idx = 0;
LPC_EMAC->RxConsumeIndex = idx;
}
/*********************************************************************//**
* @brief Increase the TxProduceIndex (after writting to the Transmit buffer
* to enable the Transmit buffer) and wrap-around the index if
* it reaches the maximum Transmit Number
* @param[in] None
* @return None
**********************************************************************/
void EMAC_UpdateTxProduceIndex(void)
{
// Get current Tx produce index
uint32_t idx = LPC_EMAC->TxProduceIndex;
/* Start frame transmission */
if (++idx == EMAC_NUM_TX_FRAG) idx = 0;
LPC_EMAC->TxProduceIndex = idx;
}
/**
* @}
*/
#endif /* _EMAC */
/**
* @}
*/
/* --------------------------------- End Of File ------------------------------ */