added informative comments

ArduinoConfig.h

@@ -2,6 +2,7 @@
 #define ARDUINOCONFIG_H_
 
 static const uint8_t COMMAND_TRANSFER_SPI = 1;
+static const uint8_t COMMAND_TRANSFER_I2C = 2;
 
 // Can be set to one for additional programming information from the primary
 // serial port which is usually also used to flash the Arduino
@@ -9,7 +10,7 @@ static const uint8_t COMMAND_TRANSFER_SPI = 1;
 // serial communication logic
 #define PROGRAMMING_OUTPUT          1
 
-#define BAUD_RATE               115200
+#define BAUD_RATE               9600
 #define SERIAL_RX_BUFFER_SIZE   256
 #define RING_BUFFER_SIZE        100
 #define MAX_PACKET_LENGTH       100

IOBoard.cpp

@@ -126,6 +126,7 @@ void transferSPI(uint8_t address, uint8_t *data, size_t datalen) {
     // requires the slave select to be driven low.
     CS_PORT = ~address;
     SPI.transfer(data, datalen);
+    // some MGM stuff. This delay might not be needed for other devices.
     delay(100);
     // Pull the slave select high again.
     CS_PORT = 0xff;