/*@only@*//*@null@*/wwd_result_t wwd_bus_read_frame( wiced_buffer_t* buffer )
{
uint32_t intstatus;
void *p0 = NULL;
uint16_t *hwtag;
intstatus = read_intstatus();
/* Handle DMA interrupts */
if (intstatus & I_XI) {
dma_tx_reclaim();
}
if ( rxactive_dma( ) == 0 )
{
refill_dma( );
if ( rxactive_dma( ) != 0 )
{
int_enab();
}
}
/* Handle DMA errors */
if (intstatus & I_ERRORS) {
refill_dma( );
WPRINT_WWD_DEBUG(("RX errors: intstatus: 0x%x\n", (unsigned int)intstatus));
}
/* Handle DMA receive interrupt */
p0 = read_dma_packet( &hwtag );
if ( p0 == NULL)
{
if ( rxactive_dma( ) != 0 )
{
int_enab();
}
return WWD_NO_PACKET_TO_RECEIVE;
}
*buffer = p0;
host_buffer_add_remove_at_front( buffer, - (int)sizeof(wwd_buffer_header_t) );
wwd_sdpcm_update_credit((uint8_t*)hwtag);
refill_dma( );
/* where are buffers from dma_rx and dma_getnextrxp created? */
return WWD_SUCCESS;
}
/* user API: requests us to start transmitting data via USB IN EP */
void fastsource_start(void)
{
if(USBD_GetState() != USBD_STATE_CONFIGURED)
return;
if (!usb_state.active)
refill_dma();
}
/* completion callback: USBD_Write() has completed an IN transfer */
static void wr_compl_cb(void *arg, unsigned char status, unsigned int transferred,
unsigned int remain)
{
struct req_ctx *rctx = arg;
usb_state.active = 0;
req_ctx_set_state(rctx, RCTX_STATE_FREE);
if (status == 0 && remain == 0) {
refill_dma();
} else {
TRACE_WARNING("Err: EP%u wr_compl, status 0x%02u, xfr %u, remain %u\r\n",
EP_NR, status, transferred, remain);
}
}
