diff options
Diffstat (limited to 'examples/device/cdc_msc/src/main.c')
| -rw-r--r-- | examples/device/cdc_msc/src/main.c | 34 |
1 files changed, 18 insertions, 16 deletions
diff --git a/examples/device/cdc_msc/src/main.c b/examples/device/cdc_msc/src/main.c index a407e2ddd..131ae6549 100644 --- a/examples/device/cdc_msc/src/main.c +++ b/examples/device/cdc_msc/src/main.c @@ -48,7 +48,6 @@ enum { static uint32_t blink_interval_ms = BLINK_NOT_MOUNTED; void led_blinking_task(void); - void cdc_task(void); /*------------- MAIN -------------*/ @@ -105,23 +104,23 @@ void tud_resume_cb(void) //--------------------------------------------------------------------+ void cdc_task(void) { - if ( tud_cdc_connected() ) + // connected() check for DTR bit + // Most but not all terminal client set this when making connection + // if ( tud_cdc_connected() ) { // connected and there are data available if ( tud_cdc_available() ) { - uint8_t buf[64]; - - // read and echo back + // read datas + char buf[64]; uint32_t count = tud_cdc_read(buf, sizeof(buf)); + (void) count; - for(uint32_t i=0; i<count; i++) - { - tud_cdc_write_char(buf[i]); - - if ( buf[i] == '\r' ) tud_cdc_write_char('\n'); - } - + // Echo back + // Note: Skip echo by commenting out write() and write_flush() + // for throughput test e.g + // $ dd if=/dev/zero of=/dev/ttyACM0 count=10000 + tud_cdc_write(buf, count); tud_cdc_write_flush(); } } @@ -131,12 +130,15 @@ void cdc_task(void) void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts) { (void) itf; + (void) rts; - // connected - if ( dtr && rts ) + // TODO set some indicator + if ( dtr ) + { + // Terminal connected + }else { - // print initial message when connected - tud_cdc_write_str("\r\nTinyUSB CDC MSC device example\r\n"); + // Terminal disconnected } } |