12F683 - Pin1 not working

[Bruce]

inp:
if but=1 then
mem1=mem1+1
endif
if mem1>12 then
mem1=1
endif
write eep1,mem1
return <<--- return to where? Maybe GOTO Init?

RETURN should only be used when you GOSUB to get there.

Also this;

high stops
low turnsign 
low bottom

May also lead to trouble. It can cause read-modify-write. Sometime it's best to write to the whole port at once instead of multiple high low statements together.

What happens if you place a PAUSE 500 after each line where you try to set or clear turnsign?

Sometimes there may be a little more capacitance on one output than others, and setting of clearing port bits one-after-another will cause read-modify-write. The value you expect on an output may not be what you expect since the 2nd bsf or bcf operation causes the previous pin to be read back (before it has changed) and written back to the pin.

[dw_picbasic]

Just one thought ruijc
Since your trying to troubleshoot the functionality of a pin to a particular device (perhaps an LED) , why not consider reducing down to the lowest level?
Create a program to control that one device and nothing more.
You can swap the code and wiring from gpio.0 to gpio.1 to see if the device is acting differently. That would allow you to verify if the issue is hardware vs code.
In some cases, I have had to sink a device rather than source it due to current limitations on the PIC. Hope that helps. :-]

[Amoque]

The original post is dated more than 5 years ago. I suspect his son is old enough to help figure out what is wrong by now.