update example for better cdc echo

hathach · hathach · commit 87572871d586 · 2022-04-20T18:52:15.000+07:00
diff --git a/examples/device/cdc_msc_freertos/src/main.c b/examples/device/cdc_msc_freertos/src/main.c
@@ -134,6 +134,7 @@ void usb_device_task(void* param)
     tud_task();
 
     // following code only run if tud_task() process at least 1 event
+    tud_cdc_write_flush();
   }
 }
 
@@ -183,7 +184,7 @@ void cdc_task(void* params)
     // if ( tud_cdc_connected() )
     {
       // There are data available
-      if ( tud_cdc_available() )
+      while ( tud_cdc_available() )
       {
         uint8_t buf[64];
 
@@ -196,8 +197,9 @@ void cdc_task(void* params)
         // for throughput test e.g
         //    $ dd if=/dev/zero of=/dev/ttyACM0 count=10000
         tud_cdc_write(buf, count);
-        tud_cdc_write_flush();
       }
+
+      tud_cdc_write_flush();
     }
 
     // For ESP32-Sx this delay is essential to allow idle how to run and reset watchdog

Original file line number	Diff line number	Diff line change
`@@ -134,6 +134,7 @@ void usb_device_task(void* param)`
`134`	`134`	`tud_task();`
`135`	`135`
`136`	`136`	`// following code only run if tud_task() process at least 1 event`
	`137`	`+ tud_cdc_write_flush();`
`137`	`138`	`}`
`138`	`139`	`}`
`139`	`140`
`@@ -183,7 +184,7 @@ void cdc_task(void* params)`
`183`	`184`	`// if ( tud_cdc_connected() )`
`184`	`185`	`{`
`185`	`186`	`// There are data available`
`186`		`- if ( tud_cdc_available() )`
	`187`	`+ while ( tud_cdc_available() )`
`187`	`188`	`{`
`188`	`189`	`uint8_t buf[64];`
`189`	`190`
`@@ -196,8 +197,9 @@ void cdc_task(void* params)`
`196`	`197`	`// for throughput test e.g`
`197`	`198`	`// $ dd if=/dev/zero of=/dev/ttyACM0 count=10000`
`198`	`199`	`tud_cdc_write(buf, count);`
`199`		`- tud_cdc_write_flush();`
`200`	`200`	`}`
	`201`	`+`
	`202`	`+ tud_cdc_write_flush();`
`201`	`203`	`}`
`202`	`204`
`203`	`205`	`// For ESP32-Sx this delay is essential to allow idle how to run and reset watchdog`