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use !tu_fifo_empty() instead of tu_fifo_count()

This commit is contained in:
hathach 2021-03-12 12:55:18 +07:00
parent 4310941daa
commit 31373fd55c
1 changed files with 9 additions and 5 deletions
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14
src/class/cdc/cdc_device.c
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@ -95,7 +95,8 @@ static void _prep_out_transaction (cdcd_interface_t* p_cdc)
// fifo can be changed before endpoint is claimed
available = tu_fifo_remaining(&p_cdc->rx_ff);
if ( available >= sizeof(p_cdc->epout_buf) ) {
if ( available >= sizeof(p_cdc->epout_buf) )
{
usbd_edpt_xfer(rhport, p_cdc->ep_out, p_cdc->epout_buf, sizeof(p_cdc->epout_buf));
}else
{
@ -435,16 +436,19 @@ bool cdcd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_
tu_fifo_write_n(&p_cdc->rx_ff, &p_cdc->epout_buf, xferred_bytes);
// Check for wanted char and invoke callback if needed
if (tud_cdc_rx_wanted_cb && ( ((signed char) p_cdc->wanted_char) != -1)) {
for (uint32_t i=0; i<xferred_bytes; i++) {
if ( p_cdc->wanted_char == p_cdc->epout_buf[i] && tu_fifo_count(&p_cdc->rx_ff) ) {
if ( tud_cdc_rx_wanted_cb && (((signed char) p_cdc->wanted_char) != -1) )
{
for ( uint32_t i = 0; i < xferred_bytes; i++ )
{
if ( (p_cdc->wanted_char == p_cdc->epout_buf[i]) && !tu_fifo_empty(&p_cdc->rx_ff) )
{
tud_cdc_rx_wanted_cb(itf, p_cdc->wanted_char);
}
}
}
// invoke receive callback (if there is still data)
if (tud_cdc_rx_cb && tu_fifo_count(&p_cdc->rx_ff) ) tud_cdc_rx_cb(itf);
if (tud_cdc_rx_cb && !tu_fifo_empty(&p_cdc->rx_ff) ) tud_cdc_rx_cb(itf);
// prepare for OUT transaction
_prep_out_transaction(p_cdc);