Control an Arduino Uno from Igor

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A proof of concept to control an Arduino Uno from Igor using the VDT2 XOP on Macintosh.

Arduino code:
int incomingByte = 0;<br />
boolean space = false;<br />
<br />
void setup() {                <br />
  // initialize the digital pin as an output.<br />
  // Pin 13 has an LED connected on most Arduino boards:<br />
  pinMode(13, OUTPUT);<br />
  Serial.begin(9600);<br />
<br />
}<br />
<br />
void loop() {<br />
  if (Serial.available() > 0) {<br />
    incomingByte = Serial.read();<br />
    if (incomingByte == 32) {<br />
      space = true;<br />
      digitalWrite(13, HIGH);   // set the LED on<br />
    }<br />
    else {<br />
      space = false;<br />
      digitalWrite(13, LOW);    // set the LED off<br />
    }<br />
  }<br />
}


- Load the code to the Arduino Uno.
- Put a link to the VDT2 XOP in the Igor Extensions folder.
- Having the Arduino connected via USB to your Mac (re)start Igor.

Then you can use 
VDTGetPortList2; print S_VDT
to show a list of all available serial ports. Choose the one that is provided by the Arduino board (it starts with 'usbmodem'), e.g. 
VDTOperationsPort2 usbmodemfa131
.
You can then switch the LED at Pin 13 on with 
VDTWrite2 /O=2 " "
and off again by some other character than space (
VDTWrite2 /O=2 "x"
).

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