[SOLVED] How to run a loop for a certain amount of time?

[ADGAN]

Re: How to run a loop for a certain amount time?

I tried everything but didn't work, I don't know what is the mistake.

 

[FvM]

Re: How to run a loop for a certain amount time?

You have set RA4/T0CKI as timer0 clock source in OPTION_REG. I guess you want an internal clock source?

 

[ADGAN]

Re: How to run a loop for a certain amount time?

No I have set the T0CS to use the internal cycle clock.

 

[FvM]

Re: How to run a loop for a certain amount time?

No I have set the T0CS to use the internal cycle clock.

How?
I'm referring to

OPTION_REG = 0x3A;

OPTION_REG
bit 5 T0CS: TMR0 Clock Source Select bit
1 = Transition on RA4/T0CKI pin
0 = Internal instruction cycle clock (CLKO)

 

[paulfjujo]

Re: How to run a loop for a certain amount time?

No I have set the T0CS to use the internal cycle clock.

if i look on datasheet 5.3 page 48
you are wrong as FvM told you before..
OPTIONREG must be 0x0A
so T0CS=0 internal instruction cycle and Prescaler=1/128

 

[ADGAN]

Re: How to run a loop for a certain amount time?

Ok what you are telling is correct. This is what happened. I referred this book not the datasheet since my PIC is 16F887.
https://www.mikroe.com/chapters/view/76/pic-basic-book-chapter-3-pic16f887-microcontroller/#c3v4

That's a mistake they have done.

- - - Updated - - -

It's working now. Thanks everybody!