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Timer1 as counter.

 
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Ventouza



Joined: 21 Apr 2014
Posts: 12
Location: Kefalonia, Greece

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Timer1 as counter.
PostPosted: Mon Apr 21, 2014 3:01 am     Reply with quote
Hi there,
this is my first post so be patient.

I try to collect pulses through the RC0 gate but nothing happens.
The input pulses created from a button with a resistance in pull down connection. And if the pulses >= 1 i want to switch a led on.
It doesn't work for me and i don't know what else i have to do.
I use 4.093 version and the development board ql200.
Here is the code
Code:

#include <16F877A.h>
#FUSES NOWDT                    //No Watch Dog Timer
#FUSES XT                       //High speed Osc (> 4mhz)
#FUSES NOPUT                    //No Power Up Timer
#FUSES NOPROTECT                //Code not protected from reading
#FUSES NOBROWNOUT               //No brownout reset
#FUSES NOLVP                    //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD                    //No EE protection
#FUSES NOWRT                    //Program memory not write protected
#FUSES NODEBUG                  //No Debug mode for ICD
#use delay(clock=4000000)

unsigned int16 a;


void main()
   {
   setup_timer_1(T1_EXTERNAL|T1_DIV_BY_1);
   
   while(1)
      {
      set_timer1(0);
      delay_ms(500);
      a=get_timer1();
      if(a>= 1)
      {
      output_high(pin_c7);
      }
      else output_low(pin_c7);
      }
   }
asmboy



Joined: 20 Nov 2007
Posts: 2128
Location: albany ny

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PostPosted: Mon Apr 21, 2014 6:59 am     Reply with quote
make sure your pic is RUNNING first!

try this in main:
Code:

void main()
   {
 
   while(1)
      {
   
      delay_ms(500);
      output_toggle (pin_c7);
   
      }
   } 


does the pin change every 1/2 second or not??
Ventouza



Joined: 21 Apr 2014
Posts: 12
Location: Kefalonia, Greece

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PostPosted: Mon Apr 21, 2014 8:19 am     Reply with quote
Yes my pic is running but i found my crystal was gone.

So it was a hardware problem. Now with new crystal the program is running perfectly.

Thanks asmboy
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