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12F683 ADC reading problem.

 
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Erol
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12F683 ADC reading problem.
PostPosted: Wed Jan 04, 2006 1:20 am     Reply with quote
i use this code but i cant read ADC,
My compiler version 3.227
i use this code at PIC16C712, and working before.

read_adc(); function is not give a result.


Code:

#include "C:\PROGRA~1\PICC\DEVICES\12F683.H"
#device ADC=8
#fuses INTRC_IO,NOWDT,PUT,BROWNOUT,NOPROTECT,NOCPD,NOMCLR, NOFCMEN
#use delay(clock=4000000,restart_wdt)

signed long int duty;     
unsigned long int adc_okunan;
unsigned int sonuc=0;       
unsigned int sonuc_pwm=0; 
unsigned int onceki_sonuc=0;
unsigned int mevcut_pwm=0;

void adc_sonuc()
{

   unsigned int x=0;
   unsigned int x_mod=0;
   unsigned int1 process=0;

   set_adc_channel(0);
   delay_us(100);
   adc_okunan=read_adc();

   while(adc_okunan>3)
   {
      adc_okunan-=4;
      x++;
   };

   x_mod=adc_okunan;

   if(x_mod==1 || x_mod==2) { sonuc = x;  process=1;  }
   if(x_mod==0 && onceki_sonuc==(x-1)) {sonuc = x-1;  process=1;}
   if(x_mod==3 && onceki_sonuc==(x+1)) {sonuc = x+1;  process=1;}
   if(process==0) sonuc=x;

   onceki_sonuc=sonuc;

   sonuc_pwm=sonuc*4;

}

void soft_lineer_pwm()
{
   if(sonuc_pwm>mevcut_pwm) { mevcut_pwm++;  delay_ms(7);   }
   if(sonuc_pwm<mevcut_pwm) { mevcut_pwm--;  delay_ms(5);   }
   set_pwm1_duty((unsigned long int)mevcut_pwm);
return;
}


void main()
{
   disable_interrupts(GLOBAL);
   setup_oscillator(OSC_4MHZ);
   setup_comparator(7);
 
   setup_port_a(sAN0 || sAN3 || VSS_VDD);
   setup_adc(adc_clock_internal);

   setup_ccp1(CCP_PWM);                   // CCP
   setup_timer_2(T2_DIV_BY_1, 49, 1);     // 20 kHz, 200 F.S.

   set_pwm1_duty((unsigned long int)25);
   delay_ms(2000);

while(TRUE)
{
   adc_sonuc();
   soft_lineer_pwm();
}

}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Jan 04, 2006 10:09 am     Reply with quote
Here is the comment from the 12F683.H file, which explains
how to use multiple constants in setup_adc_ports:
Quote:
// The following may be OR'ed in with the above using |


Here is how you are doing it:
Quote:
setup_port_a(sAN0 || sAN3 || VSS_VDD);


You should compile it both ways and look at the .LST file.
Notice the difference between Logical and Bitwise OR.
Guest
PostPosted: Thu Jan 05, 2006 4:01 am     Reply with quote
Thanks PCM programmer,

Thats different OR's.
I do mistake.
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