PIC12F629 Problem URGENT

[amayilsamy]

I'm using PIC12f629 for my small function..

I give a power to uC but it is not power on reset..

how to solve this...

 

[jayanth.devarayanadurga]

Have you enabled power on reset?

 

[amayilsamy]

I post my code here. how to enable power on reset? And we give a power what happen in uC..

I don't have external Osc.

#include <htc.h>
#define _XTAL_FREQ 4000000
#define led1on GPIO0=1;
#define led1off GPIO0=0;

__CONFIG(FOSC_INTRCIO & WDTE_OFF & CP_OFF & MCLRE_OFF);


void main()
    {
         TRISIO = 0b111111;
         GPIO2=0;
         while(1)
         {
             if(GPIO2==1)
             {

                 GPIO0=1;
                 GPIO1=1;
             
                 GPIO3=1;
                 GPIO4=0;
                 GPIO5=0;
             }
        

         /////////for(int i=0;i<=99990;i++);
        ///////// GPIO0=1;

         ////////for(int i=0;i<=99990;i++);
        }

    }

 

[jayanth.devarayanadurga]

You have set all GPIO pins as digital input pins. You should make all pins except GPIO2 as digital output using TRISIO = 0b000100; If you are using any switch at GPIO2 then you should have a debounce delay code.

https://ww1.microchip.com/downloads/en/devicedoc/reset.pdf
https://ww1.microchip.com/downloads/en/devicedoc/31003a.pdf

 

[amayilsamy]

Thanks for Correct my mistake. And I have one more doubt

I simulate the code in Proteus post output and code.

But it s not working in real time implement.

#include <htc.h>
#define _XTAL_FREQ 4000000
#define led1on GPIO0=1;
/////#define led1off GPIO0=0;

__CONFIG(FOSC_INTRCIO & WDTE_OFF & CP_OFF & MCLRE_OFF);


void main()
    {
         TRISIO = 0b000000;
         GPIO2=0;
         while(1)
         {
             
             {

                 GPIO0=1;
                 GPIO1=0;
             
             
                 GPIO4=0;
                 GPIO5=0;
             }
        

         /////////for(int i=0;i<=99990;i++);
        ///////// GPIO0=1;

         ////////for(int i=0;i<=99990;i++);
        }

    }

 

[jayanth.devarayanadurga]

There is something wrong. why GPIO0 is giving out pulses? It should be always high. Include CMCON = 0x07; in the initialization after tris settings. See if it works.

 

[amayilsamy]

Now GPIO0 is always high but it is not working in real time implement..
How to I solve this..

I also used 3 uC's.

 

[jayanth.devarayanadurga]

Post your real hardware circuit.

Try this code

---

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#include <htc.h>
#define _XTAL_FREQ 4000000
#define led GPIO0;
 
__CONFIG(FOSC_INTRCIO & WDTE_OFF & CP_OFF & MCLRE_OFF);
 
 
void main()
{
         TRISIO = 0b000000;
         GPIO=0b00000;
 
         while(1)
         {
             GPIO=0b00001;
          
         }
 
}

---

 

[amayilsamy]

Here I attached my Schematic. And your code also working in Proteus in my schematic not working..

 

[jayanth.devarayanadurga]

Try this code

---

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#include <htc.h>
#define _XTAL_FREQ 4000000
#define led GPIO0;
 
__CONFIG(FOSC_INTRCIO & WDTE_OFF & CP_OFF & MCLRE_OFF);
 
 
void main()
{
         TRISIO = 0b000000;
         ANSEL = 0x00;
         GPIO=0b00000;
 
         while(1)
         {
             GPIO=0b00001;
          
         }
 
}

---

Why have you connected 10k resistor to GPIO0? There is no current limiting resistor for LED. Maybe you LED is dead already.

 

[amayilsamy]

Thank you so much.. Now it is working good.