diff options
Diffstat (limited to 'src/class')
| -rw-r--r-- | src/class/cdc/cdc_device.c | 3 | ||||
| -rw-r--r-- | src/class/cdc/cdc_device.h | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/src/class/cdc/cdc_device.c b/src/class/cdc/cdc_device.c index 9180065c4..b979b11f1 100644 --- a/src/class/cdc/cdc_device.c +++ b/src/class/cdc/cdc_device.c @@ -416,6 +416,9 @@ bool cdcd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_ // Though maybe the baudrate is not really important !!! 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) ) { // There is no data left, a ZLP should be sent if diff --git a/src/class/cdc/cdc_device.h b/src/class/cdc/cdc_device.h index a2523d8d0..13b59416b 100644 --- a/src/class/cdc/cdc_device.h +++ b/src/class/cdc/cdc_device.h @@ -128,6 +128,9 @@ TU_ATTR_WEAK void tud_cdc_rx_cb(uint8_t itf); // Invoked when received `wanted_char` TU_ATTR_WEAK void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char); +// Invoked when space becomes available in TX buffer +TU_ATTR_WEAK void tud_cdc_tx_cb(uint8_t itf); + // Invoked when line state DTR & RTS are changed via SET_CONTROL_LINE_STATE TU_ATTR_WEAK void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts); |