/**
* @brief Receive Data Packet Done Callback function.
* Called by EMAC Standard Interrupt handler in EMAC driver
*
* Note: All packets are greater than (TX_PACKET_SIZE + 4)
* will be ignore!
*/
void RxDone_UsrCBS(void)
{
EMAC_PACKETBUF_Type RxDatbuf;
uint32_t RxLen;
/* Packet received, check if packet is valid. */
if (EMAC_CheckReceiveIndex()){
if (!EMAC_CheckReceiveDataStatus(EMAC_RINFO_LAST_FLAG)){
goto rel;
}
// Get data size, trip out 4-bytes CRC field, note that length in (-1) style format
RxLen = EMAC_GetReceiveDataSize() - 3;
// Note that packet added 4-bytes CRC created by yourself
if ((RxLen > (TX_PACKET_SIZE + 4)) || (EMAC_CheckReceiveDataStatus(EMAC_RINFO_ERR_MASK))) {
/* Invalid frame, ignore it and free buffer */
goto rel;
}
ReceiveLength = RxLen;
// Valid Frame, just copy it
RxDatbuf.pbDataBuf = (uint32_t *)gRxBuf;
RxDatbuf.ulDataLen = RxLen;
EMAC_ReadPacketBuffer(&RxDatbuf);
PacketReceived = TRUE;
rel:
/* Release frame from EMAC buffer */
EMAC_UpdateRxConsumeIndex();
}
_DBG_("Rx done");
RxDoneCount++;
}
void ENET_IRQHandler (void)
{
uint32_t int_stat;
EMAC_PACKETBUF_Type RxDatbuf = {
.pbDataBuf = uip_buf,
};
// Get EMAC interrupt status
while ((int_stat = (LPC_EMAC->IntStatus & LPC_EMAC->IntEnable)) != 0) {
LPC_EMAC->IntClear = int_stat; /*clear interrupt*/
if ((int_stat & EMAC_INT_RX_DONE))
{
if (EMAC_CheckReceiveDataStatus(EMAC_RINFO_ERR_MASK)) {
/*error*/
goto rel;
}
/*copy frame to uip buffer*/
uip_len = RxDatbuf.ulDataLen = EMAC_GetReceiveDataSize() - 3;
EMAC_ReadPacketBuffer(&RxDatbuf);
packet_received = 1;
rel:
/*release frame from EMAC buffer*/
EMAC_UpdateRxConsumeIndex();
}
}
}
/**
* Brief Receive Error Interrupt Callback function
* Note:
* The EMAC doesn't distinguish the frame type and frame length,
* so, e.g. when the IP(0x8000) or ARP(0x0806) packets are received,
* it compares the frame type with the max length and gives the
* "Range" error. In fact, this bit is not an error indication,
* but simply a statement by the chip regarding the status of
* the received frame
*/
void RxError_UsrCBS(void)
{
if (EMAC_CheckReceiveDataStatus(EMAC_RINFO_RANGE_ERR) == RESET){
RXErrorCount++;
_DBG_("Rx error: ");
}
}
int _EMAC_CheckReceiveDataStatus(uint8_t * args)
{
uint8_t * arg_ptr;
uint32_t ulRxStatType;
if ((arg_ptr = (uint8_t *) strtok(NULL, " ")) == NULL) return 1;
ulRxStatType = (uint32_t) strtoul((char *) arg_ptr, NULL, 16);
sprintf((char *) str, "%x\r\n", (unsigned int) EMAC_CheckReceiveDataStatus(ulRxStatType));
writeUSBOutString(str);
return 0;
}
void ENET_IRQHandler( void )
{
uint32_t ulInterruptCause;
extern volatile portBASE_TYPE xInsideISR;
struct pbuf *p;
struct eth_hdr *pxHeader;
xInsideISR++;
while( ( ulInterruptCause = LPC_EMAC->IntStatus ) != 0 )
{
/* Clear the interrupt. */
LPC_EMAC->IntClear = ulInterruptCause;
/* Clear fatal error conditions. */
if( ( ulInterruptCause & EMAC_INT_TX_UNDERRUN ) != 0U )
{
LPC_EMAC->Command |= EMAC_CR_TX_RES;
}
if( ( ulInterruptCause & EMAC_INT_RX_DONE ) != 0UL )
{
/* A packet has been received. */
if( EMAC_CheckReceiveIndex() != FALSE )
{
if( EMAC_CheckReceiveDataStatus( EMAC_RINFO_LAST_FLAG ) == SET )
{
/* move received packet into a new pbuf */
p = prvLowLevelInput();
/* no packet could be read, silently ignore this */
if( p != NULL )
{
/* points to packet payload, which starts with an Ethernet header */
pxHeader = p->payload;
switch( htons( pxHeader->type ) )
{
/* IP or ARP packet? */
case ETHTYPE_IP:
case ETHTYPE_ARP:
/* Full packet send to tcpip_thread to process */
configASSERT( pxNetIfInUse );
if( pxNetIfInUse->input( p, pxNetIfInUse ) != ERR_OK )
{
LWIP_DEBUGF(NETIF_DEBUG, ( "ethernetif_input: IP input error\n" ) );
pbuf_free(p);
p = NULL;
}
break;
default:
pbuf_free( p );
p = NULL;
break;
}
}
else
{
configASSERT( ( volatile void * ) NULL );
}
}
/* Release the frame. */
EMAC_UpdateRxConsumeIndex();
}
}
if( ( ulInterruptCause & EMAC_INT_TX_DONE ) != 0UL )
{
/* Nothing to do here. */
}
}
xInsideISR--;
}
/*********************************************************************//**
* @brief Ethernet service routine handler
* @param[in] none
* @return none
**********************************************************************/
void ENET_IRQHandler (void)
{
EMAC_PACKETBUF_Type RxDatbuf;
uint32_t RxLen;
/* EMAC Ethernet Controller Interrupt function. */
uint32_t int_stat;
// Get EMAC interrupt status
while ((int_stat = (LPC_EMAC->IntStatus & LPC_EMAC->IntEnable)) != 0) {
// Clear interrupt status
LPC_EMAC->IntClear = int_stat;
/* scan interrupt status source */
/* ---------- receive overrun ------------*/
if((int_stat & EMAC_INT_RX_OVERRUN))
{
RXOverrunCount++;
_DBG_("Rx overrun");
}
/*----------- receive error -------------*/
/* Note:
* The EMAC doesn't distinguish the frame type and frame length,
* so, e.g. when the IP(0x8000) or ARP(0x0806) packets are received,
* it compares the frame type with the max length and gives the
* "Range" error. In fact, this bit is not an error indication,
* but simply a statement by the chip regarding the status of
* the received frame
*/
if ((int_stat & EMAC_INT_RX_ERR))
{
if (EMAC_CheckReceiveDataStatus(EMAC_RINFO_RANGE_ERR) == RESET){
RXErrorCount++;
_DBG_("Rx error: ");
}
}
/* ---------- RX Finished Process Descriptors ----------*/
if ((int_stat & EMAC_INT_RX_FIN))
{
RxFinishedCount++;
_DBG_("Rx finish");
}
/* ---------- Receive Done -----------------------------*/
/* Note: All packets are greater than (TX_PACKET_SIZE + 4)
* will be ignore!
*/
if ((int_stat & EMAC_INT_RX_DONE))
{
/* Packet received, check if packet is valid. */
if (EMAC_CheckReceiveIndex()){
if (!EMAC_CheckReceiveDataStatus(EMAC_RINFO_LAST_FLAG)){
goto rel;
}
// Get data size, trip out 4-bytes CRC field, note that length in (-1) style format
RxLen = EMAC_GetReceiveDataSize() - 3;
// Note that packet added 4-bytes CRC created by yourself
if ((RxLen > (TX_PACKET_SIZE + 4)) || (EMAC_CheckReceiveDataStatus(EMAC_RINFO_ERR_MASK))) {
/* Invalid frame, ignore it and free buffer */
goto rel;
}
ReceiveLength = RxLen;
// Valid Frame, just copy it
RxDatbuf.pbDataBuf = (uint32_t *)gRxBuf;
RxDatbuf.ulDataLen = RxLen;
EMAC_ReadPacketBuffer(&RxDatbuf);
PacketReceived = TRUE;
rel:
/* Release frame from EMAC buffer */
EMAC_UpdateRxConsumeIndex();
}
_DBG_("Rx done");
RxDoneCount++;
}
/*------------------- Transmit Underrun -----------------------*/
if ((int_stat & EMAC_INT_TX_UNDERRUN))
{
TXUnderrunCount++;
_DBG_("Tx under-run");
}
/*------------------- Transmit Error --------------------------*/
if ((int_stat & EMAC_INT_TX_ERR))
{
TXErrorCount++;
_DBG_("Tx error");
}
/* ----------------- TX Finished Process Descriptors ----------*/
if ((int_stat & EMAC_INT_TX_FIN))
{
TxFinishedCount++;
_DBG_("Tx finish");
}
/* ----------------- Transmit Done ----------------------------*/
if ((int_stat & EMAC_INT_TX_DONE))
{
TxDoneCount++;
_DBG_("Tx done");
}
#if ENABLE_WOL
/* ------------------ Wakeup Event Interrupt ------------------*/
/* Never gone here since interrupt in this
* functionality has been disable, even if in wake-up mode
*/
if ((int_stat & EMAC_INT_WAKEUP))
{
WOLCount++;
}
#endif
}
}
