pins wont go low!

[reaperarch]

hi, all.
im having a weird problem trying to control some leds.
if i say:

high 1
pause 1000
low 1
pause 1000
high 2
etc...

pin 1 doesn't turn off when the code hits low 1. it turns off when pin2 is supposed to go low! pin 2 only turns off when 4 goes low etc...

all other commands work fine. if anyone could help, it would be much appreciated.
ps: im using a 08m starter kit.

 

[eclectic]

Reaperarch

1. What is the full program please.

2. How does it behave, when you run it in the Simulator?

3. Exactly how have you connected the LED's / resistors?

e

 

[reaperarch]

hi, thanks for the reply.
the full prog is:
l:
high 1
pause 1000
low 1
pause 1000
high 2
pause 1000
low 2 (pin1 turns off here)
pause 1000
high 4
pause 1000
low 4 (pin2 turns off here)
pause 1000
goto l

they're rgb leds with built in resistors (1-red,2-blue,4-green). the sim runs fine.

 

[eclectic]

Sorry, I'm still a little bit confused.

1. The simulator is OK. Great.

2. The Program looks OK.


"they're rgb leds with built in resistors (1-red,2-blue,4-green)."

I don't quite understand that line

3. So, how exactly is everything connected?


I'm assuming your 08 board looks like the one in the pic.

 

[reaperarch]

yep, thats the proto board.
pin 1 is red, 2 is green, 4 is blue
the leds are from sparkfun. they come in a strip of 3 with builtin smd resistors

 

[reaperarch]

aha, i found the prob, you turn them on by pulling the pins low :$
thanks for the effort

 

[hippy]

It sounds like it could be a wiring issue or perhaps some confusion between common-cathode or common-anode.

You say when the pins turn a LED off, but which commands turn them on ?

Added : Dang ! My Crystal Ball is running just a little too slow today