RE: I need to genertae pwm signal 4 mhz using nrf54l15 .

Sharon123 — Mon, 18 May 2026 14:19:00 GMT

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