Timer0 PIC16F917

[Dragu Mircea]

Hy.I am a beginner in programming microcontroller. I use PIC16F917 microcontroller.I made a program who must realize the next tasks :

 

– Led D0 stay ON 3 second

– Led D0 goes OFF and remain in these state 3 second.

 

My program :

 

  #include<pic.h>

 

  int count = 0;

  int main()

  {

      TRISD = 0b01111111;      // RD7 – output

      TMR0 = 0;                         // Timer register is reset

      T0CS = 0;                          // Work with internal CLK

      T0SE = 0;                          // Reacting on Low to High edge

      PSA = 0;                            // Work with a prescaler

      PS0 = 1;

      PS1 = 1;

      PS2 = 1;                             // Prescaler value divides in 256

      while(1)

      {

          PORTDbits.RD7 = 1;     // D7 pin is ON

          while(!T0IF);                   // Stays here 256 times and then T0IF=1

          T0IF = 0;                        // Reseting the overflow flag

          count++;                          // Increasing by 1

          if(count == 46)

          {

               count = 0;                   // When count reaches 46 – reseting to 0

           }

          PORTDbits.RD7 = 0;

          while(!T0IF);       

          T0IF = 0;           

          count++;            

          if(count == 46)

          {

               count = 0;       

          }

    }

}

 

Thank you.

With respect Mircea.

[Author]

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