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PIC16F18326 internal OSC

 
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aldina



Joined: 09 Oct 2009
Posts: 26

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PIC16F18326 internal OSC
PostPosted: Wed May 03, 2023 10:19 am     Reply with quote
Hello,

I'm using PIC16F18326.
I need to read some ADC (AN0) inputs and according to the input value I have a green (PIN_A1) or red (PIN_A5) signal output.
I think I have some problem with Osc or clock frequency because my delays are wrong.
Other thing is: I only need to make one test (one program main), but it was always running as I have a while(true).
May I have some help from you?
Code:

#include <16F18326.h>
#device ADC=10
#FUSES LVP      // Should be NOLVP
#FUSES WDT                      //Watch Dog Timer
#FUSES RSTOSC_LFINTRC
#FUSES NOCLKOUT
#FUSES BROWNOUT, LPBOR, PUT, BORV27     // Power up Timer and Brownouts
#FUSES NOPROTECT  // Should be NOPROTECT
#fuses NOEXTOSC   // *** ADD THIS LINE RIGHT HERE ***
#use delay(internal=32000000) //,restart_wdt)

#BYTE OSCCON1 = 0x919  // OSCCON register (pg 47 datasheet)
#BYTE OSCCON2 = 0x91A  // OSCCON register (pg 47 datasheet)
#BYTE WDTCON = 0x97 // WDTCON (pg 33 datasheet)
//#use standard_io (ALL)

#include <stdio.h>
#include <stdlib.h>

// LEDs intensity
float LDR()
{
    int8 i;
    float intlum;
    float intlum_sum;
    float intlum_average;

    intlum = 0;   
    intlum_sum = 0;
    intlum_average = 0;
    i = 0;

    set_adc_channel(0);
    delay_us(5);

    for(i=0;i<100;i++)
    {
       intlum = read_adc();
       delay_us(5);
       intlum_sum += intlum;
       delay_us(5);
    }

    intlum_average = intlum_sum/100;

    return intlum_average;
}

void presenca()
{
   restart_wdt();
   float Position;
   Position = 0;
           
        // POSITION
    output_high(PIN_C0); // Position ON
    delay_ms(1000);
    Position = LDR();

   if(Position <= 70) // && Position >= 20)  // Position: 0.14 ~ 0.34 V (Read 0.242V)
   {
      //output_high(PIN_A1); // ON green
      //delay_ms(100);
      //output_low(PIN_A1);
      output_low(PIN_C0);
      //delay_ms(100);
   }
   else if(Position > 70) // || Position < 20)
   {
      output_high(PIN_A5); // ON Red
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      break;
   }
}

void STOP()
{
   restart_wdt();
   float Stop;
   Stop = 0;
   
   output_high(PIN_C1); // Stop ON
   delay_ms(1000);
   Stop = LDR();
     
   if(Stop <= 165) // || Stop >= 110)
   {
      //output_high(PIN_A1); // green
      //delay_ms(100);
      //output_low(PIN_A1);
      output_low(PIN_C1);
      //delay_ms(100);
   }
   else if(Stop > 165) // || Stop < 110)
   {
      output_high(PIN_A5); // ON red
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      break;
   }
}

void DI()
{
   restart_wdt();
   float Pisca;
   Pisca = 0;
   
   output_high(PIN_C2); // DI ON
   delay_ms(1000);
   Pisca = LDR();
   
   if(Pisca <= 155)
   {
      //output_high(PIN_A1); // green
      //delay_ms(100);
      //output_low(PIN_A1);
      output_low(PIN_C2);
      //delay_ms(100);
   }           
   else if(Pisca > 155)
   {
      output_high(PIN_A5); // ON red
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      break;
   }
}

void Fog()
{
   restart_wdt();
   float Nev;
   Nev = 0;
   
   output_high(PIN_C3); // fog ON
   delay_ms(1000);
   Nev = LDR();
   
   if(Nev <= 205)
   {
      //output_high(PIN_A1); // green
      //delay_ms(100);
      //output_low(PIN_A1);
      output_low(PIN_C3);
      //delay_ms(100);
   }   
   else if(Nev > 205)
   {
      output_high(PIN_A5); // ON red
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      break;
   }
}

void Reverse()
{
   restart_wdt();
   float MA;
   MA = 0;

   output_high(PIN_C4); // reverse ON
   delay_ms(1000);
   MA = LDR();
   
    if(MA <= 185)
    {
      output_low(PIN_C4);
      output_high(PIN_A1); // green
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      //output_low(PIN_A1);
      break;
    }
    else if(MA > 185)
    {
      output_high(PIN_A5); // ON red
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      delay_ms(1000);
      break;
   }
}

void main()
{

   setup_adc_ports(SAN0);
   setup_adc(ADC_CLOCK_INTERNAL);
   //set_tris_c(0x00);
   //set_tris_b(0x00);
   
   output_low(PIN_C0);  // Position
   output_low(PIN_C1);  // Stop
   output_low(PIN_C2);  // DI
   output_low(PIN_C3);  // Fog
   output_low(PIN_C4);  // Reverse
   output_low(PIN_A1);  // Green sign
   output_low(PIN_A5);  // Red sign
         
   //while(true)
   //{
      //restart_wdt();
      //delay_ms(500);
      presenca();
      delay_ms(100);
      STOP();
      delay_ms(100);
      DI();
      delay_ms(100);
      Fog();
      delay_ms(100);
      Reverse();
      //delay_ms(500);   
      break;
   //}
}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed May 03, 2023 7:42 pm     Reply with quote
The 16F18326 data sheet says in the WDT section:
Quote:
After a Reset, the default time-out period is two seconds.

You have several 5 second delays. The WDT is going to reset after 2 secs.

I'd advise you to disable WDT during development of your program.
Change the fuse to NOWDT.
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