[ARM] single edge PWM in LPC2138

[eric_s88]

Hi everyone! happy to joined you in this forum :wink:

I want to have 2 single edge pwm (pwm6 and pwm1) in outputs of lpc2138. but I don't know why I have only one pwm signal!! I mean when I activate them only 1 output generate the signal. I want 2 signals that are inverted and non-inverted whats wrong with the code ?
I use IAR as compiler.

in its library I have:

void pwm6_init(void)
{
  PWMPR=0x00000DFF;
  PWMPCR|=(1<<14);
  PWMMR0=0x000000FF;
  PWMMCR=0x00000002;
  PWMTCR=0x00000002;
  PWMTCR=0x00000009;
  PINSEL0|=(1<<19);
}

void pwm6_out(us32 value)
{
  PWMMR6=value;
  PWMLER=64;
}

void pwm1_init(void)
{
  PWMPR=0x000003FF;
  PWMPCR|=(1<<9);
  PWMMR0=0x000000FF;
  PWMMCR=0x00000002;
  PWMTCR=0x00000002;
  PWMTCR=0x00000009;
  PINSEL0|=(1<<1);
}

void pwm1_out(us32 value)
{
  PWMMR1=value;
  PWMLER=2;
}

and in the main.c

void main (void)
{
 pwm1_init();
 pwm1_out(127);

 pwm6_init();
  pwm6_out(230);

  while(1)
  {
  



  }



}

 

[eric_s88]

hi again. I found the problem. it was the PWMLER register that I did not set correct.

another question. I want one of this 2 signals, be inverted (starts with 0 value) .. which register would do that for me?