message: Update usart.c
  Added a comment regarding baud rate. Probably should be tied into the build system at some point such that it does not need to be changed manually.
diff: @@ -66,7 +66,7 @@ void MX_UART4_Init(void)
  {
  huart4.Instance = UART4;
  - huart4.Init.BaudRate = 115200;
  + huart4.Init.BaudRate = 115200; // Provisionally this can be changed to 921600 for faster transfers, the low power Arduinos will not keep up.
  huart4.Init.WordLength = UART_WORDLENGTH_8B;
  huart4.Init.StopBits = UART_STOPBITS_1;
  huart4.Init.Parity = UART_PARITY_NONE;
  