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Timer2 Placement

 
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GiG



Joined: 03 Sep 2021
Posts: 39

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Timer2 Placement
PostPosted: Sat Sep 04, 2021 11:43 pm     Reply with quote
Hi, I am using the timer0 in Micro. I wanted to replace with timer 2 instead.
Thanks for the tips on how to write the values and how to calculate them.
I want that prescaler 4 for timer 2, and micro clock 8 MHz.
Code:
#INT_TIMER0
void count_overflow()
{
set_timer0(131);
counter++;                     
clear_interrupt(INT_TIMER0);
}

void calculate_time()
{//---------------------------Calculate_time-------------------------//
if (counter>=2000){
   second++;
   counter=0;
  }
if (second>=59){
   minute++;
   second=0;
  }
if (minute>=59){
   hour++;
  }
if (hour>=23){
   hour=minute=second=0;
  }
}

void main(){
  Setup_timer_0(RTCC_INTERNAL|RTCC_DIV_8);
  enable_interrupts(INT_TIMER0);
  enable_interrupts(GLOBAL); 
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Sep 05, 2021 1:44 am     Reply with quote
Look in the 16F1939.h file. Look in the section for Timer2.
It shows you what parameters are for setup_timer_2().

Also look in the CCS manual. Download it here:
http://www.ccsinfo.com/downloads/ccs_c_manual.pdf
Look on pages 562 and 563 for setup_timer_2().
temtronic



Joined: 01 Jul 2010
Posts: 9093
Location: Greensville,Ontario

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PostPosted: Sun Sep 05, 2021 5:08 am     Reply with quote
Also, if you're creating a 'real time clock', see the software 'zero drift RTC' program in the 'code library'. It works for any PIC, any clock.......

Jay
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