andy/tinyUSB
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

add tud_ready() check in tud_cdc_n_write_flush()

Browse Source 
other clean up
This commit is contained in:
hathach
2020-11-23 23:40:13 +07:00
parent 308028e17c
commit 4b4f880785
4 changed files with 15 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
src/class/cdc/cdc_device.c
View File

@@ -178,6 +178,9 @@ uint32_t tud_cdc_n_write_flush (uint8_t itf)
{
cdcd_interface_t* p_cdc = &_cdcd_itf[itf];
// Skip if usb is not ready yet
TU_VERIFY( tud_ready(), 0 );
// No data to send
if ( !tu_fifo_count(&p_cdc->tx_ff) ) return 0;
@@ -231,9 +234,10 @@ void cdcd_init(void)
p_cdc->line_coding.parity = 0;
p_cdc->line_coding.data_bits = 8;
// config fifo
// Config RX fifo
tu_fifo_config(&p_cdc->rx_ff, p_cdc->rx_ff_buf, TU_ARRAY_SIZE(p_cdc->rx_ff_buf), 1, false);
// tx fifo is set to overwritable at initialization and will be changed to not overwritable
// Config TX fifo as overwritable at initialization and will be changed to non-overwritable
// if terminal supports DTR bit. Without DTR we do not know if data is actually polled by terminal.
// In this way, the most current data is prioritized.
tu_fifo_config(&p_cdc->tx_ff, p_cdc->tx_ff_buf, TU_ARRAY_SIZE(p_cdc->tx_ff_buf), 1, true);
@@ -251,9 +255,12 @@ void cdcd_reset(uint8_t rhport)
for(uint8_t i=0; i<CFG_TUD_CDC; i++)
{
tu_memclr(&_cdcd_itf[i], ITF_MEM_RESET_SIZE);
tu_fifo_clear(&_cdcd_itf[i].rx_ff);
tu_fifo_clear(&_cdcd_itf[i].tx_ff);
cdcd_interface_t* p_cdc = &_cdcd_itf[i];
tu_memclr(p_cdc, ITF_MEM_RESET_SIZE);
tu_fifo_clear(&p_cdc->rx_ff);
tu_fifo_clear(&p_cdc->tx_ff);
tu_fifo_set_overwritable(&p_cdc->tx_ff, true);
}
}
@@ -381,7 +388,7 @@ bool cdcd_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t
p_cdc->line_state = (uint8_t) request->wValue;
// Disable fifo overwriting if DTR bit is set
tu_fifo_set_mode(&p_cdc->tx_ff, !dtr);
tu_fifo_set_overwritable(&p_cdc->tx_ff, !dtr);
TU_LOG2(" Set Control Line State: DTR = %d, RTS = %d\r\n", dtr, rts);