这里讲一下soem的网卡驱动

大小端序

ethercattype.h文件夹里有一些关于大端序、小端序的宏定义。

#if !defined(EC_BIG_ENDIAN) && defined(EC_LITTLE_ENDIAN)#define htoes(A) (A)#define htoel(A) (A)#define htoell(A) (A)#define etohs(A) (A)#define etohl(A) (A)#define etohll(A) (A)#elif !defined(EC_LITTLE_ENDIAN) && defined(EC_BIG_ENDIAN)#define htoes(A) ((((uint16)(A) & 0xff00) >> 8) | \(((uint16)(A) & 0x00ff) << 8))#define htoel(A) ((((uint32)(A) & 0xff000000) >> 24) | \(((uint32)(A) & 0x00ff0000) >> 8)  | \(((uint32)(A) & 0x0000ff00) << 8)  | \(((uint32)(A) & 0x000000ff) << 24))#define htoell(A) ((((uint64)(A) & (uint64)0xff00000000000000ULL) >> 56) | \(((uint64)(A) & (uint64)0x00ff000000000000ULL) >> 40) | \(((uint64)(A) & (uint64)0x0000ff0000000000ULL) >> 24) | \(((uint64)(A) & (uint64)0x000000ff00000000ULL) >> 8)  | \(((uint64)(A) & (uint64)0x00000000ff000000ULL) << 8)  | \(((uint64)(A) & (uint64)0x0000000000ff0000ULL) << 24) | \(((uint64)(A) & (uint64)0x000000000000ff00ULL) << 40) | \(((uint64)(A) & (uint64)0x00000000000000ffULL) << 56))#define etohs  htoes#define etohl  htoel#define etohll htoell#else#error "Must define one of EC_BIG_ENDIAN or EC_LITTLE_ENDIAN"#endif

这里选择小端序（默认）。

nicdiv文件修改

这里只罗列了一部分

ecx_setupnic

/** Basic setup to connect NIC to socket.* @param[in] port        = port context struct* @param[in] ifname      = Name of NIC device, f.e. "eth0"* @param[in] secondary   = if >0 then use secondary stack instead of primary* @return >0 if succeeded*/
int ecx_setupnic(ecx_portt *port, const char *ifname, int secondary)
{int i;int rVal;int *psock;//   port->getindex_mutex = mtx_create();
//   port->tx_mutex = mtx_create();
//   port->rx_mutex = mtx_create();//   rVal = bfin_EMAC_init((uint8_t *)priMAC);
//   if (rVal != 0)
//      return 0;if (secondary){/* secondary port stuct available? */if (port->redport){/* when using secondary socket it is automatically a redundant setup *///psock = &(port->redport->sockhandle);*psock = -1;port->redstate                   = ECT_RED_DOUBLE;//port->redport->stack.sock        = &(port->redport->sockhandle);port->redport->stack.txbuf       = &(port->txbuf);port->redport->stack.txbuflength = &(port->txbuflength);port->redport->stack.tempbuf     = &(port->redport->tempinbuf);port->redport->stack.rxbuf       = &(port->redport->rxbuf);port->redport->stack.rxbufstat   = &(port->redport->rxbufstat);port->redport->stack.rxsa        = &(port->redport->rxsa);ecx_clear_rxbufstat(&(port->redport->rxbufstat[0]));}else{/* fail */return 0;}}else{//      port->getindex_mutex = mtx_create();
//      port->tx_mutex = mtx_create();
//      port->rx_mutex = mtx_create();port->sockhandle        = -1;port->lastidx           = 0;port->redstate          = ECT_RED_NONE;//port->stack.sock        = &(port->sockhandle);port->stack.txbuf       = &(port->txbuf);port->stack.txbuflength = &(port->txbuflength);port->stack.tempbuf     = &(port->tempinbuf);port->stack.rxbuf       = &(port->rxbuf);port->stack.rxbufstat   = &(port->rxbufstat);port->stack.rxsa        = &(port->rxsa);ecx_clear_rxbufstat(&(port->rxbufstat[0]));psock = &(port->sockhandle);}  /* setup ethernet headers in tx buffers so we don't have to repeat it */for (i = 0; i < EC_MAXBUF; i++){ec_setupheader(&(port->txbuf[i]));port->rxbufstat[i] = EC_BUF_EMPTY;}ec_setupheader(&(port->txbuf2));return 1;
}

ecx_outframe

/** Transmit buffer over socket (non blocking).* @param[in] port        = port context struct* @param[in] idx         = index in tx buffer array* @param[in] stacknumber  = 0=Primary 1=Secondary stack* @return socket send result*/
int ecx_outframe(ecx_portt *port, int idx, int stacknumber)
{int lp, rval;ec_stackT *stack;if (!stacknumber){stack = &(port->stack);}else{stack = &(port->redport->stack);}lp = (*stack->txbuflength)[idx];//rval = bfin_EMAC_send((*stack->txbuf)[idx], lp);rval = EthWrPacket((*stack->txbuf)[idx], lp);(*stack->rxbufstat)[idx] = EC_BUF_TX;return rval;
}

ecx_recvpkt

/** Non blocking read of socket. Put frame in temporary buffer.* @param[in] port        = port context struct* @param[in] stacknumber = 0=primary 1=secondary stack* @return >0 if frame is available and read*/
static int ecx_recvpkt(ecx_portt *port, int stacknumber)
{int lp, bytesrx;ec_stackT *stack;if (!stacknumber){stack = &(port->stack);}else{stack = &(port->redport->stack);}lp = sizeof(port->tempinbuf);//bytesrx = bfin_EMAC_recv((*stack->tempbuf), lp);bytesrx = EthRdPacket((*stack->tempbuf));port->tempinbufs = bytesrx;return (bytesrx > 0);
}

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基于STM32构建EtherCAT主站（SOEM方案）5

大小端序

nicdiv文件修改

ecx_setupnic

ecx_outframe

ecx_recvpkt

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