send_frame

#include <net_config.h>

void send_frame (
    OS_FRAME* frame );    /* Pointer to the ethernet frame to send. */

The send_frame function sends the ethernet frame packet using the ethernet controller. The argument frame points to the ethernet frame constructed by the TCPnet system. The component frame->length holds the total length of the frame that needs to be transferred.

The send_frame function is part of RL-TCPnet. The prototype is defined in net_config.h.

note

• You must provide the send_frame function if the ethernet controller you use is different from the ones provided in the TCPnet source.
• The TCPnet system calls send_frame when it has constructed the ethernet frame that needs to be sent to the network.

None

init_ethernet, poll_ethernet

void send_frame (OS_FRAME *frame) {
  /* Send frame to EMAC ethernet controller */
  U32 idx,len;
  U32 *sp,*dp;

  idx = MAC_TXPRODUCEINDEX;
  sp  = (U32 *)&frame->data[0];
  dp  = (U32 *)Tx_Desc[idx].Packet;

  /* Copy frame data to EMAC packet buffers. */
  for (len = (frame->length + 3) >> 2; len; len--) {
    *dp++ = *sp++;
  }
  Tx_Desc[idx].Ctrl = (frame->length-1) | (TCTRL_INT | TCTRL_LAST);

  /* Start frame transmission. */
  if (++idx == NUM_TX_FRAG) idx = 0;
  MAC_TXPRODUCEINDEX = idx;
}