diff options
| -rw-r--r-- | cores/arduino/HardwareSerial.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp index 1b1fa71..9985b78 100644 --- a/cores/arduino/HardwareSerial.cpp +++ b/cores/arduino/HardwareSerial.cpp @@ -46,8 +46,8 @@ struct ring_buffer { unsigned char buffer[SERIAL_BUFFER_SIZE]; - volatile int head; - volatile int tail; + volatile unsigned int head; + volatile unsigned int tail; }; #if defined(USBCON) |