pin 12f683

[Bruce]

Post the code you're having problems with. Hard to say without seeing that.

[jcleaver]

got most things working now except
cannot get changover from 1 to 0 on gpio.0
its going high due to the pullup but when i ground does not respond

might not be explaining this properly but can work on gpio.5

where i have a resistor to gnd and a pb to 5 volts

[jcleaver]

What Seems To Be Happening Is I Cannot Get Gpi0.0 To Change State Using The Pullup
Dont Know If Its A Electrical Issue Or Not See Sample Program Above Just Grounding Pin 7 Momentarily
But Prgram Does Not Respond Works On Gpi0.5 With A Res Pulled Low And A Pb To High

[Bruce]

Which PIC are you actually using? Your code example above indicates a 12F675, but you asked about the 12F683?

For the 12F675 you need CMCON = 7 to disable comparators.
For the 12F683 you need CMCON0 = 7 to disable comparators.

[jcleaver]

bruce i tried both but the pic12f675 works with one of my programmers beter dont have to keep swaping out the pic so thats what i am trying now
really does not mater after i get it working

[Bruce]

How does it work with this?

@ DEVICE PIC12F675,MCLR_OFF,INTRC_OSC_NOCLKOUT,WDT_OFF,BOD_ON,PWRT_ON
ANSEL = 0         
CMCON = 7  
OPTION_REG = 0    
TRISIO = %00100011
WPU = %00000011

' Example program from manual to blink an LED connected to gpio.4 about once
' a sec
led var gpio.0

loop:
   if  led = 1 then
       low 2
   else
       high 2
   endif

   HIGH gpio.4
   ' Turn on LED connected to gpio.4
   Pause 1000    ' Delay for .5 seconds
   LOW gpio.4
   ' Turn off LED connected to gpio.4
   Pause 500       ' Delay for .5 seconds 
   Goto loop       ' Go back to loop and blink LED forever
   End

[jcleaver]

this functions but not as expected at first pin to v+ caused change
than after short time v- caused change which is what i would expect
dont quiet understand inital operation but this is doing what i want
thanks