C6657: Using ethernet in my own application without BIOS

Other Parts Discussed in Thread: SYSBIOS

Hi,

I was wondering how can I send and receive packets over ethernet.

I have tried to port the example given in:

C:\ti\pdk_C6657_1_1_1_4\packages\ti\drv\emac\example\EMACBenchmark

but without success, since I do not wish to work with tasks.

My init function looks as follows:

void eth_init (void)
{
	EMAC_CONFIG_INFO_T          emac_cfg;

#ifdef TWO_PORT_DEV
	port_num                        = 1;
#endif
	open_cfg.master_core_flag       = TRUE;
	open_cfg.mdio_flag              = TRUE;
	open_cfg.loop_back              = FALSE;
	open_cfg.num_of_tx_pkt_desc     = APP_EMAC_INIT_TX_PKTS;
	open_cfg.num_of_rx_pkt_desc     = APP_EMAC_INIT_RX_PKTS;
	open_cfg.max_pkt_size           = APP_EMAC_INIT_PKT_SIZE;
	open_cfg.num_of_chans           = APP_EMAC_NUM_CHANS_PER_CORE;
	open_cfg.p_chan_mac_addr        = &chan_cfg;
	open_cfg.rx_pkt_cb              = app_rx_pkt;
	open_cfg.alloc_pkt_cb           = app_alloc_pkt;
	open_cfg.free_pkt_cb            = app_free_pkt;

	if (port_num == 0)
	{
		open_cfg.phy_addr           = APP_PORT0_PHY_ADDR;
	}
#ifdef TWO_PORT_DEV
else
{
	open_cfg.phy_addr           = APP_PORT1_PHY_ADDR;
}
#endif

	/* Set the channel configuration */
	chan_cfg.chan_num               = chan_num;
	chan_cfg.num_of_mac_addrs       = APP_EMAC_NUM_MACADDRS_PER_CHAN;
	memcpy(mac_addr.addr, tx_mac_addr, EMAC_MAC_ADDR_LENTH);
	chan_cfg.p_mac_addr             = &mac_addr;

	/* Always open the channel 0 on port 0 for receive task */
	if (emac_open(port_num, &open_cfg) == EMAC_DRV_RESULT_OK)
	{
		emac_cfg.mcast_cnt       = 0;
		emac_cfg.p_mcast_list    = NULL;
		emac_cfg.rx_filter       = EMAC_PKTFLT_MULTICAST;
		emac_config(port_num, &emac_cfg);

		/* Enable RX/TX interrupt */
		Osal_emacExitSingleCoreCriticalSection(port_num);
	}
	else
	{
		printf ("Application open EMAC port %d error \n", port_num);
	}

}

And to transmit the packet I use the following:

void Transmit_Pkt(unsigned char* buffer, unsigned int len){
	EMAC_PKT_DESC_T    p_pkt_desc;

	unsigned char send_buf[APP_EMAC_MAX_PKT_SIZE] = {0};

	p_pkt_desc.AppPrivate   = (Uint32)  &p_pkt_desc;
	p_pkt_desc.Flags        = EMAC_PKT_FLAG_SOP | EMAC_PKT_FLAG_EOP;
	p_pkt_desc.ValidLen     = APP_EMAC_TEST_TX_PKT_SIZE;
	p_pkt_desc.DataOffset   = 0;
	p_pkt_desc.PktChannel   = chan_num;
	p_pkt_desc.PktLength    = APP_EMAC_TEST_TX_PKT_SIZE;
	p_pkt_desc.PktFrags     = 1;


	p_pkt_desc.pDataBuffer = send_buf;
	/* Invalidate cache if data in external memory */
	//Osal_emacBeginMemAccess(send_buf, APP_EMAC_TEST_TX_PKT_SIZE);

	// copy data
	memcpy(app_mcb.test_pkt_buf, buffer, len);

	if (multicast)
	{
		/* Fill in the multicast destination address */
		memcpy(p_pkt_desc.pDataBuffer, mcast_mac_addr0, EMAC_MAC_ADDR_LENTH);
	}
	else if (broadcast)
	{
		/* Fill in the broadcast destination address */
		memset(p_pkt_desc.pDataBuffer, 0xff, EMAC_MAC_ADDR_LENTH);
	}
	else
	{
		/* Fill in the unitcast destination address */
		memcpy(p_pkt_desc.pDataBuffer, rx_mac_addr, EMAC_MAC_ADDR_LENTH);
	}

	/* Fill in the source address */
	memcpy(&p_pkt_desc.pDataBuffer[EMAC_MAC_ADDR_LENTH], tx_mac_addr, EMAC_MAC_ADDR_LENTH);

	/* Fill in the Ether Type and Payload */
	memcpy(&p_pkt_desc.pDataBuffer[2*EMAC_MAC_ADDR_LENTH],
			app_mcb.test_pkt_buf,
			APP_EMAC_TEST_TX_PKT_SIZE-2*EMAC_MAC_ADDR_LENTH);

	/* Write back cache to memory if data in external memory */
	//Osal_emacEndMemAccess(p_pkt_desc.pDataBuffer, APP_EMAC_TEST_TX_PKT_SIZE);

	emac_send(port_num, &p_pkt_desc);


}

My transmit function causes exception.

Can you please provide me an example or point out my mistake?

Thanks in advance,

Kfir.