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[Moved] Regarding PWM interfacing in LPC2138

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Ravindrakant Jha

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I am trying to blink an LED on p0.1 on LPC2138 using PWM,its T-on 20 % but led is not even work.
The code is not showing output.
Code C - [expand]
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#include <LPC213X.H>
#define PRESCALE 2999
void initPWM()
{
    PINSEL0|=(1<<10);//pin select
    PWMPCR=0x00;//by default sigle edge output
    PWMPR=PRESCALE-1;//pre scaler
    PWMMR0=20000;//20ms
    PWMMR1=1000; //10ms
    PWMMCR|=(1<<1);//RESET PWMTC
    PWMLER|=(1<<1);//latch enable
    PWMPCR|=(1<<9);//PWM1 output enabled
    PWMTCR|=(1<<1);//reset pwm
    PWMTCR|=(1<<0)|(1<<3);
}
int main()
{
  initPWM();
  while(1)
  {
        if( !((IO0PIN) & (1<<1)) )
        {
          PWMMR1=2000;
          PWMLER|=(1<<1);
        }
  }
}
 
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