diff options
| author | Andrew Leech <[email protected]> | 2024-05-07 20:17:48 +1000 |
|---|---|---|
| committer | Andrew Leech <[email protected]> | 2024-05-08 19:41:02 +1000 |
| commit | d01b2cfc0e25e6d64f8d7a2d764c2620e0d9d71f (patch) | |
| tree | cc54334e5dded188fd319f8f47813e775027fa73 | |
| parent | e5b6f93df35d7ac413ca405e67a6c9d8c79b680d (diff) | |
Add option to make CDC TX buffer persistent.
| -rw-r--r-- | src/class/cdc/cdc_device.c | 2 | ||||
| -rw-r--r-- | src/class/cdc/cdc_device.h | 6 |
2 files changed, 8 insertions, 0 deletions
diff --git a/src/class/cdc/cdc_device.c b/src/class/cdc/cdc_device.c index 2e0a0c30d..f36725eba 100644 --- a/src/class/cdc/cdc_device.c +++ b/src/class/cdc/cdc_device.c @@ -295,7 +295,9 @@ void cdcd_reset(uint8_t rhport) tu_memclr(p_cdc, ITF_MEM_RESET_SIZE); tu_fifo_clear(&p_cdc->rx_ff); + #if !CFG_TUD_CDC_PERSISTENT_TX_BUFF tu_fifo_clear(&p_cdc->tx_ff); + #endif tu_fifo_set_overwritable(&p_cdc->tx_ff, true); } } diff --git a/src/class/cdc/cdc_device.h b/src/class/cdc/cdc_device.h index 20e908451..db709b3bc 100644 --- a/src/class/cdc/cdc_device.h +++ b/src/class/cdc/cdc_device.h @@ -41,6 +41,12 @@ #define CFG_TUD_CDC_EP_BUFSIZE (TUD_OPT_HIGH_SPEED ? 512 : 64) #endif +// By default the TX fifo buffer is cleared on connect / bus reset. +// Enable this to persist any data in the fifo instead. +#ifndef CFG_TUD_CDC_PERSISTENT_TX_BUFF + #define CFG_TUD_CDC_PERSISTENT_TX_BUFF (0) +#endif + #ifdef __cplusplus extern "C" { #endif |