I need to genertae pwm signal 4 mhz using nrf54l15 .

[Sharon123]

I need to generate PWM siganl around 4 mhz frequency but i did not get proper pwm signal and i got only millivolt range voltage   this issue cuase i did not get proper audio , my bclk is 256khz mclk 8khz , actually mclk us issue like above , I have doubt in here it is when i configure 4 mhz we didnt get proper pwm shape why ?? I am change 1 mhz that time good pwm shape is got

[Sharon123]

int pwm_4mhz_configure(void)

{

    int ret;

    uint32_t period_ns = PWM_PERIOD_NS;

    uint32_t pulse_ns = PWM_PULSE_NS;

    if (!pwm_is_ready_dt(&mclk))

•     {

  int pwm_4mhz_configure(void)
  {
      int ret;
      uint32_t period_ns = PWM_PERIOD_NS;
      uint32_t pulse_ns = PWM_PULSE_NS;
  
      if (!pwm_is_ready_dt(&mclk))
      {
         // printk("PWM device not ready: %s\n", DT_ALIAS(mclk));
          return -ENODEV;
      }
  
      // Set 4 MHz clock: period = 250 ns, 50% duty cycle = 125 ns
    //  ret = pwm_set_dt(&mclk, PWM_HZ(4000000), PWM_HZ(4000000) / 2);
      ret=  pwm_set_dt(&mclk,period_ns,pulse_ns);
      if (ret != 0)
      {
          printk("Failed to configure PWM: ret=%d\n", ret);
          return ret;
      }
  
      printk("PWM configured: period=%dns, pulse=%dns\n", period_ns, pulse_ns);
  
      return ret;
  }
  

       // printk("PWM device not ready: %s\n", DT_ALIAS(mclk));

        return -ENODEV;

    }

    // Set 4 MHz clock: period = 250 ns, 50% duty cycle = 125 ns

  //  ret = pwm_set_dt(&mclk, PWM_HZ(4000000), PWM_HZ(4000000) / 2);

    ret=  pwm_set_dt(&mclk,period_ns,pulse_ns);

    if (ret != 0)

    {

        printk("Failed to configure PWM: ret=%d\n", ret);

        return ret;

    }

    printk("PWM configured: period=%dns, pulse=%dns\n", period_ns, pulse_ns);

    return ret;

}

 use this