WRITE not working

[mister_e]

One thing i don't understand here... It's working @4MHz. I'm not really much familiar with timer but...


Original code:

• 1. Prescaler 1:8
  2. interrupt on Timer overflow
  3. Must interrupt each and every : (1/(4MHZ / 4))*8*256 = 2 mSec

BUT i read 3 pause 7 in your interrupt routine... longer than interrupt itself... this is why i don't understand why it was working without at least disable interrupts.

DISABLE or INTCON=0 at the begining of your interrupt routine may do something.


By the way, let's say you have 20Mhz:

• 1. prescaler 1:256
  2. Interrupt on Timer overflow
  3. Must interrupt each and every : (1/(20Mhz/4))*256*256 =13 mSec.

reduce your PAUSE to... let's say 3 or 4 and post what's happen now.