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Changes to CDC example code:

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- auto flush welcome message at connection event
- provide information to the user if the terminal did not set DTR
This commit is contained in:
Jan Dümpelmann 2020-11-18 10:16:32 +01:00
parent e7069da7eb
commit 6a72cc5d48
1 changed files with 11 additions and 0 deletions
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11
examples/device/cdc_msc/src/main.c
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@ -137,6 +137,7 @@ void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
{
// print initial message when connected
tud_cdc_write_str("\r\nTinyUSB CDC MSC device example\r\n");
tud_cdc_write_flush();
}
}
@ -144,6 +145,16 @@ void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
void tud_cdc_rx_cb(uint8_t itf)
{
(void) itf;
uint8_t const line_state = tud_cdc_get_line_state();
// Provide information that terminal did not set DTR bit
if( !(line_state & 0x01) )
{
tud_cdc_write_str("\r\nTinyUSB example: Your terminal did not set DTR bit\r\n");
tud_cdc_write_flush();
// Clear rx fifo since we do not read the data
tud_cdc_read_flush();
}
}
//--------------------------------------------------------------------+