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Problem with hot pin 11 on propeller proto usb board — Parallax Forums

Problem with hot pin 11 on propeller proto usb board

Thomas FletcherThomas Fletcher Posts: 91
edited 2009-05-09 20:23 in Propeller 1
I have an led attached to pin 11 on the the proto usb board that stays on constant. I even ran a simple blink program on another pin but pin 11 stays on.

Is pin 11 used for something else?

Comments

  • Mike GreenMike Green Posts: 23,101
    edited 2009-05-09 13:41
    I/O pins 0-15 are only connected to a pair of holes next to the processor chip. How do you have the LED connected? What is the program in the Propeller?
  • Thomas FletcherThomas Fletcher Posts: 91
    edited 2009-05-09 14:00
    I have a wire running from one of the adjoining p11 holes to a resister that is then connected to the positive lead of the led. The negative lead is attached by wire to one of the VSS holes in the line of vss holes to the right of the board.

    The program I am trying to run is the "magic compass" program I have been working on that is now a complete mess (mostly working but a mess). So I loaded the simple led blink program using pin 4 (just to be sure the program wasn't the problem) and the led on pin 11 still stays on.

    Now I have more pins tied to leds that are working as expected (pointing in the direction that I want according to the program), but I wonder if using them is the problem.

    I am using pins 11 to 26 to light directional leds around a compass face and pins 5 to 10 to light the distance to target leds.
  • Mike GreenMike Green Posts: 23,101
    edited 2009-05-09 14:05
    If you're loading the simple blink program without any changes, then all other I/O pins should be in input mode which means that your LED on pin 11 should be off. Either you have some kind of short circuit where you've soldered to the Protoboard or you've somehow damaged the I/O pin so it's stuck on.
  • Thomas FletcherThomas Fletcher Posts: 91
    edited 2009-05-09 14:31
    Thank you for your help. I took the wire from pin 11 and put it on another pin and the led goes on and off like it suppose to on that pin, so that must leave a damaged pin 11. I wonder if I sent it the 
    dira[noparse][[/noparse]11]~

    command if that would at least turn it off and I would just use another pin.
  • Toby SeckshundToby Seckshund Posts: 2,027
    edited 2009-05-09 20:23
    Probable stupid surgestion but ..

    Are you talking about Pin 11 or P11? depending on which package you have it would be P10 on pin11-LQFP, or reset on DIP
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