diff options
| -rw-r--r-- | cores/arduino/HardwareSerial.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp index 6738675..1154ae7 100644 --- a/cores/arduino/HardwareSerial.cpp +++ b/cores/arduino/HardwareSerial.cpp @@ -313,16 +313,22 @@ void HardwareSerial::begin(long baud) sbi(*_ucsrb, _rxen); sbi(*_ucsrb, _txen); sbi(*_ucsrb, _rxcie); - cbi(*_ucsrb, _udrie); // XXX: what if there's already data in the tx buffer? + cbi(*_ucsrb, _udrie); } -// XXX: should we empty the rx and tx buffers here? void HardwareSerial::end() { + // wait for transmission of outgoing data + while (_tx_buffer->head != _tx_buffer->tail) + ; + cbi(*_ucsrb, _rxen); cbi(*_ucsrb, _txen); cbi(*_ucsrb, _rxcie); cbi(*_ucsrb, _udrie); + + // clear any received data + _rx_buffer->head = _rx_buffer->tail; } int HardwareSerial::available(void) |