PIC12F675 trouble

[Bruce]

btfss is for testing individual "bits" in a file register.

You would use btfss _leftCount,1 to test bit position 1 in leftCount. This
seems like an unnecessary test at any rate since you're clearing leftCount
at the entry point to your asm routine, and leftCount will always be zero.

Also be aware that you're only accessing the low bytes in your leftCount
and dur word variables the way you're when doing it.

To access the high byte in dur you would use decfsz _dur+1,f. Dur is a pointer
to the low byte. Adding _dur+1 moves the pointer to the next byte location
in ram.

[russman613]

awesome information - i love it when there is a simple answer.

thx for the tips and for pointing out my issue. i will try to fix up what you guys have pointed out this evening and retry. also looks like new.txt is worth a closer look.

any idea why the PIC seems to just hang? I would expect that it would at least toggle the statusLED for me that i've set up before it gets to a piece of bad code. or, am i to expect "unexpected" behavior anytime i muck up the logic anywhere in the program?

russ

[russman613]

awesome information - i love it when there is a simple answer. i had actually meant that line to read:

btfss gpio, 3;
incfsz _leftCount, 1 ;23,us - this line causes a problem it seems too.


thx for the tips and for pointing out my issue. i will try to fix up what you guys have pointed out this evening and retry. also looks like new.txt is worth a closer look.

any idea why the PIC seems to just hang? I would expect that it would at least toggle the statusLED for me that i've set up before it gets to a piece of bad code. or, am i to expect "unexpected" behavior anytime i muck up the logic anywhere in the program?

russ