Example #1
0
unsigned long ulEMACRead( void )
{
unsigned long ulBytesReceived;

	ulBytesReceived = prvCheckRxFifoStatus();

	if( ulBytesReceived > 0 )
	{
		/* Mark the pxDescriptor buffer as free as uip_buf is going to be set to
		the buffer that contains the received data. */
		prvReturnBuffer( uip_buf );

		/* Point uip_buf to the data about ot be processed. */
		uip_buf = ( void * ) pxCurrentRxDesc->buf_p;
		
		/* Allocate a new buffer to the descriptor, as uip_buf is now using it's
		old descriptor. */
		pxCurrentRxDesc->buf_p = prvGetNextBuffer();

		/* Prepare the descriptor to go again. */
		pxCurrentRxDesc->status &= ~( FP1 | FP0 );
		pxCurrentRxDesc->status |= ACT;

		/* Move onto the next buffer in the ring. */
		pxCurrentRxDesc = pxCurrentRxDesc->next;
		
		if( EDMAC.EDRRR.LONG == 0x00000000L )
		{
			/* Restart Ethernet if it has stopped */
			EDMAC.EDRRR.LONG = 0x00000001L;
		}
	}

	return ulBytesReceived;
}
Example #2
0
unsigned long ulEMACRead( void )
{
    unsigned long ulBytesReceived;

    ulBytesReceived = prvCheckRxFifoStatus();

    if( ulBytesReceived > 0 )
    {
        xCurrentRxDesc->status &= ~( FP1 | FP0 );
        xCurrentRxDesc->status |= ACT;

        if( EDMAC.EDRRR.LONG == 0x00000000L )
        {
            /* Restart Ethernet if it has stopped */
            EDMAC.EDRRR.LONG = 0x00000001L;
        }

        /* Mark the pxDescriptor buffer as free as uip_buf is going to be set to
        the buffer that contains the received data. */
        prvReturnBuffer( uip_buf );

        uip_buf = ( void * ) xCurrentRxDesc->buf_p;

        /* Move onto the next buffer in the ring. */
        xCurrentRxDesc = xCurrentRxDesc->next;
    }

    return ulBytesReceived;
}