Fix SerialBT.flush (#3579)

mishafarms · me-no-dev · me-no-dev · commit b4a9684a7438 · 2020-01-20T22:34:57.000+02:00
* Fix flush

flush should not flush the read buffer, it should wait till all output is drained from the write buffer.

* Update BluetoothSerial.cpp

Co-authored-by: Me No Dev &lt;me-no-dev@users.noreply.github.com&gt;
diff --git a/libraries/BluetoothSerial/src/BluetoothSerial.cpp b/libraries/BluetoothSerial/src/BluetoothSerial.cpp
@@ -660,7 +660,11 @@ size_t BluetoothSerial::write(const uint8_t *buffer, size_t size)
 
 void BluetoothSerial::flush()
 {
-    while(read() >= 0){}
+    if (_spp_tx_queue != NULL){
+        while(uxQueueMessagesWaiting(_spp_tx_queue) > 0){
+	    delay(5);
+        }
+    }
 }
 
 void BluetoothSerial::end()

Original file line number	Diff line number	Diff line change
`@@ -660,7 +660,11 @@ size_t BluetoothSerial::write(const uint8_t *buffer, size_t size)`
`660`	`660`
`661`	`661`	`void BluetoothSerial::flush()`
`662`	`662`	`{`
`663`		`- while(read() >= 0){}`
	`663`	`+ if (_spp_tx_queue != NULL){`
	`664`	`+ while(uxQueueMessagesWaiting(_spp_tx_queue) > 0){`
	`665`	`+ delay(5);`
	`666`	`+ }`
	`667`	`+ }`
`664`	`668`	`}`
`665`	`669`
`666`	`670`	`void BluetoothSerial::end()`