12F675 and interrupt

[Acetronics2]

Hi,

Sorry, but simulator behaviour is something making me laugh too much ...

my last program didn't want to run on MPSIM ... but has been working more than fine for two weeks now ... ( Was a periodic signal generator, interrupt driven ...)

sooo, I can't help you further in the virtual world ...

Alain

BTW ... Periclès was for joke ...

[perides]

Hi Alain

I agree with you about sims.
The code appears to be in the right way at least?

[Acetronics2]

Hi,

I never use pullups ...

you should try to add external resistors ... even on the sim' ...

you also should avoid PWM command for such uses ... this outputs an awful garbage ( just usable with a RC filter to make a basic D/A converter. )

as you have written the program ...

it is easy to do it like that :

 for mypwm = 1000 to 0 step -1
        High LAMP
        PAUSEUS myPWM,
        LOW Lamp
        PAUSEUS (1000 -myPWM)
Next myPWM

note PAUSEUS has a minimum duration ... but it is not a problem here !!!

Alain

[sayzer]

The code seems to be ok;
To make it even easier to see, drop the red part.

   IF TK = 1 and LAMP = 1 then 'if TK goes down and LAMP is yet on
      IF L15 = 1 THEN 'and we have canceled delay
         goto justfade 'so go to fade lamp
       else
         GOTO delay 'and if delay was not canceled go to delay+fade
       endif
   ENDIF

and, just use this:

   IF TK = 1 and LAMP = 1 then delay

Also, your PWM routine happens so fast that your eyes will not catch the fade effect.
Have a timer loop, say 5ms, in your pwm loop, like "while : wend" and put your pwm pulse inside this "while : wend". Thus, you have a smooth fade effect.

None of these modifications will make your GPIO pin work though.
Just some ideas to make your code better.