diff options
| -rw-r--r-- | cores/arduino/HardwareSerial.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/cores/arduino/HardwareSerial.h b/cores/arduino/HardwareSerial.h index 7f4f162..1beafc5 100644 --- a/cores/arduino/HardwareSerial.h +++ b/cores/arduino/HardwareSerial.h @@ -34,6 +34,11 @@ // location from which to read. // NOTE: a "power of 2" buffer size is reccomended to dramatically // optimize all the modulo operations for ring buffers. +// WARNING: When buffer sizes are increased to > 256, the buffer index +// variables are automatically increased in size, but the extra +// atomicity guards needed for that are not implemented. This will +// often work, but occasionally a race condition can occur that makes +// Serial behave erratically. See https://github.com/arduino/Arduino/issues/2405 #if !defined(SERIAL_TX_BUFFER_SIZE) #if (RAMEND < 1000) #define SERIAL_TX_BUFFER_SIZE 16 |