On Sat, 29 Mar 2003 18:10:36 -0500, Robert O'Robberson wrote:

<snip>
>
>The Loop section is a call down to a delay function. Should be more than
>four cycles but it might not be as slow as I think it is. Tried passing a
>value from another bit on the port via a push-button but that does not cycle
>the LED either.
>

Your loop section isn't doing what you think it is. At the top, your
code sets the port bit and then waits for a while. That part is all
well and good.

At the bottom of your loop, though, the code clears the port bit but
the very next thing that it does is to jump back to the top of the
loop code and immediately turn the bit back on. Those cycles that the
LED is turned off will never be seen at normal clock rates.

If you were to add another delay after turning the bit off (but before
you jump back to your loop top), you'll probably see the LED blinking.


Regards, Bob

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