PWM Code not Outputting Expected Values

hi,
i trying write code changes duty cycle of each pulse 25%. fading example without delay @ end , different frequency. when test code using oscilloscope pulses change duty cycle properly. i'm not sure if wrote code wrong or not, can help! here code:

code: [select]

/*
this code designed output square wave @ 60 hz on pins 5 , 6
date: march 19, 2014
authour: edward white
version: 2
*/

int p1 = 3;        //pin 3 first output
int p2 = 9;        //pin 9 second output


// setup routine runs once when press reset:
void setup()  {
  //declare pin 3 , 9 outputs
  pinmode(p1,output);
  pinmode(p2,output);
  // set output frequency 490.2 hz
  tccr1b = tccr1b & 0b11111000 | 0x03;
  tccr2b = tccr2b & 0b11111000 | 0x04;
}

// loop routine run forever:
void loop()  {
  //increase pin 3 0 98.8% duty cycle:
  for(int dutycycle = 0 ; dutycycle <=252; dutycycle +=63){
    // sets value  (range 0 252):
    analogwrite(p1, dutycycle);
  }
  // decrease pin 3 98.8% 0% duty cycle:
  for(int dutycycle = 252 ; dutycycle >=0; dutycycle -=63) {
    //sets value (range 252 0):
    analogwrite(p1, dutycycle);
  }
  //increase pin 9 0% 98.8% duty cyle:
  for(int dutycycle = 0 ; dutycycle <=252; dutycycle +=63){
    // sets value (range 0 252):
    analogwrite(p2, dutycycle);
  }
  // decrese pin 9 98.8% 0% dutycycle:
  for(int dutycycle = 252 ; dutycycle >=0; dutycycle -=63) {
    //sets value (range 252 0)
    analogwrite(p2, dutycycle);
  }
}
 

i'm not getting errors when verify code.
thanks,
ed

quote from: edwise on mar 21, 2014, 10:47 pm

when test code using oscilloscope pulses change duty cycle properly.

if word "to" should "do"then sounds program working properly.

but guess not or wouldn't posting here. problem?

...r

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