diff options
| -rw-r--r-- | cores/arduino/HardwareSerial.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp index d6d7b60..db6b149 100644 --- a/cores/arduino/HardwareSerial.cpp +++ b/cores/arduino/HardwareSerial.cpp @@ -278,6 +278,8 @@ void HardwareSerial::begin(unsigned long baud) use_u2x = false; } #endif + +try_again: if (use_u2x) { *_ucsra = 1 << _u2x; @@ -286,6 +288,12 @@ void HardwareSerial::begin(unsigned long baud) *_ucsra = 0; baud_setting = (F_CPU / 8 / baud - 1) / 2; } + + if ((baud_setting > 4095) && use_u2x) + { + use_u2x = false; + goto try_again; + } // assign the baud_setting, a.k.a. ubbr (USART Baud Rate Register) *_ubrrh = baud_setting >> 8; |