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I've do changes to my code, and hopefully it is right.
I've put the #use fast_io and change the variable A1_pressed to be TRUE, actually the pin A1 is on-off button.

Here is the new code:
#use fa ...

i do make mistake as i put 50 for pwm value, i've corrected the code by replacing it to 125 as 50% from duty cycle.

but i'm a bit confusing about fast_io. do you mean that i need not to set tris in ...

hi..
i need a help to recheck my programming. i need to produce output frequency at 5kHz. the problem is when i build the pic 16f877a into circuit, the led is not blinking.

Here the code:

#incl ...

hi..im using 16f877a and im currently develop a current generator that can produce current at 4 different frequencies.
i've chosen to have 2 button which for single frequency=50kHz and the other butt ...