Serial: write(buf, len) returns the number of bytes written

facchinm · facchinm · commit dd14c34c1f93 · 2020-09-30T12:36:28.000+02:00
diff --git a/cores/arduino/Serial.cpp b/cores/arduino/Serial.cpp
@@ -125,7 +125,7 @@ size_t UART::write(const uint8_t* c, size_t len) {
 	while (!_serial->writeable()) {}
 	_serial->set_blocking(true);
 	int ret = _serial->write(c, len);
-	return ret == -1 ? 0 : 1;
+	return ret < 0 ? 0 : ret;
 }
 
 void UART::block_tx(int _a) {

Original file line number	Diff line number	Diff line change
`@@ -125,7 +125,7 @@ size_t UART::write(const uint8_t* c, size_t len) {`
`125`	`125`	`while (!_serial->writeable()) {}`
`126`	`126`	`_serial->set_blocking(true);`
`127`	`127`	`int ret = _serial->write(c, len);`
`128`		`- return ret == -1 ? 0 : 1;`
	`128`	`+ return ret < 0 ? 0 : ret;`
`129`	`129`	`}`
`130`	`130`
`131`	`131`	`void UART::block_tx(int _a) {`