PIC18f45k22 MikroC compiler PWM contorl

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Karolina_1

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hi, everyone. i am trying to control PWM modulation. But i am having some errors. I am using mikroC compiler and pic18f45k22. my code is given below can u possibly help. pleaseee. :|:|

Code: 
void InitMain() {
PORTB = 0; // set PORTB to 0
TRISB = 0xF0; // designate PORTB pins as output
PORTC = 0; // set PORTC to 0
TRISC = 0xFF; // designate PORTC pins as output
Pwm1_Init(5000); // Initialize PWM1 module at 5KHz
PWM2_Init(5000); // Initialize PWM2 module at 5KHz

}

void main(){
InitMain();
PWM2_start();
   while (1) {                         // endless loop

  // 100% duty cycle:  duty ratio can be calculated as (Percent*255)/100.
  PWM2_Set_Duty(255); // Change the duty cycle
  delay_ms(3000); //3 seconds delay

  // 80% duty cycle
  PWM2_Set_Duty(204); // Change the duty cycle
  delay_ms(3000); //3 seconds delay

  // 50% duty cycle
  PWM2_Set_Duty(127); // Change the duty cycle
  delay_ms(3000); //3 seconds delay

  // 30% duty cycle
  PWM2_Set_Duty(76); // Change the duty cycle
  delay_ms(3000); //3 seconds delay

   // 10% duty cycle
   PWM2_Set_Duty(25); // Change the duty cycle
   delay_ms(3000); //3 seconds delay

  }

}
 
Last edited by a moderator:

Hello,

But i am having some errors.
Click to expand...
This is no error description.

Please tell what you expect .. and what you see instead.
If there are error messages, then please post the exact and complete error message.

Klaus
 
PIC18f45k22, pin RC(CCP2) should give pwm signal and width could be controlled. i add 8MHz external oscillator. 


Code C - [expand]
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void main() {
  ANSELA = 0;    // Configure Analog pins as digital Input/Output pins
  ANSELC = 0;
 
  PORTC = 0;         // set PORTC to 0
  TRISC = 0;         // designate PORTC pins as output
  PWM1_Init(8000);   // Initialize PWM2 module at 8KHz
 
  PWM2_Start();              // start PWM2
  PWM2_Set_Duty(255);       // Set current duty cycle to 100%
 
  while (1) {                         // endless loop
 
  // 100% duty cycle:  duty ratio can be calculated as (Percent*255)/100.
  PWM2_Set_Duty(255); // Change the duty cycle
  delay_ms(3000); //3 seconds delay
 
  // 80% duty cycle
  PWM2_Set_Duty(204); // Change the duty cycle
  delay_ms(3000); //3 seconds delay
 
  // 50% duty cycle
  PWM2_Set_Duty(127); // Change the duty cycle
  delay_ms(3000); //3 seconds delay
 
  // 30% duty cycle
  PWM2_Set_Duty(76); // Change the duty cycle
  delay_ms(3000); //3 seconds delay
 
   // 10% duty cycle
   PWM2_Set_Duty(25); // Change the duty cycle
   delay_ms(3000); //3 seconds delay
 
  }
}


 
Last edited by a moderator:

Karolina_1 said: 
Code C - [expand]
1

PWM1_Init(8000);   // Initialize PWM2 module at 8KHz

This might also cause a few issues! Is the comment (and all of the other code) correct or are you really wanting to use PWM #1?
Susan
Click to expand...
 
Ok. In your circuit it shows that you want to use CCP2 and so you should use

Code: 
PWM2_Init(8000);
 

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