Chipkit PI pin 8 and 9 not working?

Question

So I am trying to blink a couple of leds on pins 8 and 9, and not getting anything to work.

I've tried different pins, and the leds work, so I know it's not the leds. I also tried different leds on pin 8 and 9 and nothing.

here is a snip of the code:

void setup() {

pinMode(8, OUTPUT);

pinMode(9, OUTPUT);

}

void loop() {

digitalWrite(8, HIGH);

delay(1000);

digitalWrite(8, LOW);

delay(1000);

digitalWrite(9, HIGH);

delay(1000);

digitalWrite(9, LOW);

delay(1000);

}

I'm not sure, but wondering if a jumper needs to be set, I've search the net, and couldn't find an answer. I did try to change the pin numbers to the PIC numbers and not the arduino numbers, still nothing.

Any one got any ideas what to try?

Former Member · Accepted Answer

Looking at the pin relationships in the quick start guide, pins 8 & 9 are used for d+/d- (which are usually symbollic for usb data lines) so either they are reserved just for that function or you would have to find some way to alter the pin functions before you can use them as gpio pins. Im not familiar with the language or command set the chipkit pi uses so with going further into the documentation, this is all the help I can give right now but i hope it sheds some light on your issues and sets you on a path to resolve them. I used to do a lot of work with PIC's and in most cases it should be possible to change their function.