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Call tud_cdc_tx_cb right after flush to keep tx fifo full

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Gavin Li 2020-06-20 22:12:10 -07:00 committed by GitHub
parent 8fe887198b
commit 7ae47a9397
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 3 deletions
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6
src/class/cdc/cdc_device.c
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@ -416,9 +416,6 @@ bool cdcd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_
// Though maybe the baudrate is not really important !!! // Though maybe the baudrate is not really important !!!
if ( ep_addr == p_cdc->ep_in ) if ( ep_addr == p_cdc->ep_in )
{ {
// invoke transmit callback to possibly refill tx fifo
if ( tud_cdc_tx_cb && !tu_fifo_full(&p_cdc->tx_ff) ) tud_cdc_tx_cb(itf);
if ( 0 == tud_cdc_n_write_flush(itf) ) if ( 0 == tud_cdc_n_write_flush(itf) )
{ {
// There is no data left, a ZLP should be sent if // There is no data left, a ZLP should be sent if
@ -428,6 +425,9 @@ bool cdcd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_
usbd_edpt_xfer(TUD_OPT_RHPORT, p_cdc->ep_in, NULL, 0); usbd_edpt_xfer(TUD_OPT_RHPORT, p_cdc->ep_in, NULL, 0);
} }
} }
// invoke transmit callback to possibly refill tx fifo
if ( tud_cdc_tx_cb && !tu_fifo_full(&p_cdc->tx_ff) ) tud_cdc_tx_cb(itf);
} }
// nothing to do with notif endpoint for now // nothing to do with notif endpoint for now