diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/class/cdc/cdc_device.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/src/class/cdc/cdc_device.c b/src/class/cdc/cdc_device.c index 317355ed7..8ea44b28d 100644 --- a/src/class/cdc/cdc_device.c +++ b/src/class/cdc/cdc_device.c @@ -164,11 +164,10 @@ uint32_t tud_cdc_n_write_flush (uint8_t itf) uint8_t const rhport = TUD_OPT_RHPORT; - // claim the endpoint first - TU_VERIFY( usbd_edpt_claim(rhport, p_cdc->ep_in), 0 ); + // Claim the endpoint first + TU_VnERIFY( usbd_edpt_claim(rhport, p_cdc->ep_in), 0 ); - // we can be blocked by another write()/write_flush() from other thread. - // causing us to attempt to transfer on an busy endpoint. + // Pull data from FIFO uint16_t const count = tu_fifo_read_n(&p_cdc->tx_ff, p_cdc->epin_buf, sizeof(p_cdc->epin_buf)); if ( count && tud_cdc_n_connected(itf) ) |