Software PWM on pic 18f

[8051]

Can anyone give me some advice on how to generate an additional pwm output with the pic18f4520.
I see that it is possible to do so but all I can find is examples in assembler and I only know C

 

[btbass]

If you are using timer 2 for the timebase of your other pwm outputs,
you can use the timer 2 interrupt to generate a pwm.
For example.

#define PUMP_PERIOD 100

volatile unsigned char pump_pwm_mark;

//set pwm width

pump_pwm_mark = 50;

/*--- Output  pwm ---*/

interrupt function()
  {
  static unsigned char period = 0U;
    
  period++;
  period = period > PUMP_PERIOD ? 0U : period;
  
  if(period < pump_pwm_mark){
    PWM_OUT = 1;
    }
  else{
    PWM_OUT = 0;
    } 
    
  /* Clear interrupt flag */
  }