[PWM] Method for PWM on/off Control

Question

I am programming with the nRF52840DK. [Toolchain Manager: v1.3.0, IDE: Visual Studio Code (VSCode), SDK: ncs v2.6.0, window11 pro]

I'd like to inquire about methods for PWM on/off control. I'm wondering if the approach I'm currently using is common. If not, could you suggest more efficient methods?

    while (1) {
        if(pwm_on_off == 0){
            ret = pwm_set_dt(&pwm, PWM_PERIOD, PWM_PERIOD); // PWM off
            pwm_on_off = 1;
        }else if(pwm_on_off == 1){
            ret = pwm_set_dt(&pwm, PWM_PERIOD, PWM_PULSE_WIDTH);  // PWM on
            pwm_on_off = 0;
        }
        k_msleep(SLEEP_TIME_MS);
    }

I plan to integrate this PWM control function into another application. Therefore, I'm looking for the optimal way to control PWM on/off while minimizing CPU load.

below is main.c

#include <zephyr/kernel.h>
#include <zephyr/sys/printk.h>
#include <zephyr/device.h>
#include <zephyr/drivers/pwm.h>

#define SLEEP_TIME_MS   1000
#define GPIO_PIN6        31
#define PWM0_NODE DT_NODELABEL(pwm0)

#define PWM_PERIOD 1000000  // period = On_time + Off_time  [ns]
#define PWM_PULSE_WIDTH 700000  // Off_time  [ns]
static const struct pwm_dt_spec pwm= PWM_DT_SPEC_GET(DT_ALIAS(pwm_led0));
int pwm_on_off=0;

int main(void)
{
    int ret;
    ret = device_is_ready(pwm.dev);
    printk("device_is_ready: %d \n", ret); //t: 1
    ret = pwm_set_dt(&pwm, PWM_PERIOD, PWM_PULSE_WIDTH);
    printk("pwm_set_dt: %d \n", ret); //t: 1

    while (1) {
        if(pwm_on_off == 0){
            ret = pwm_set_dt(&pwm, PWM_PERIOD, PWM_PERIOD); // PWM off
            pwm_on_off = 1;
        }else if(pwm_on_off == 1){
            ret = pwm_set_dt(&pwm, PWM_PERIOD, PWM_PULSE_WIDTH);  // PWM on
            pwm_on_off = 0;
        }
        k_msleep(SLEEP_TIME_MS);
    }

    return 0;
}

below is code of .overlay

&gpio0 {
    status = "okay";
};

/* &pwm0 {
    status = "okay";
};
 */
&pinctrl {
    pwm0_default_custom: pwm0_default_custom {
        group1 {
            psels = <NRF_PSEL(PWM_OUT0, 0, 31)>;
            nordic,invert;
        };
    };
    pwm0_sleep_custom: pwm0_sleep_custom {
        group1 {
            psels = <NRF_PSEL(PWM_OUT0, 0, 31)>;
            low-power-enable;
        };
    };
};
&pwm0 {
    pinctrl-0 = <&pwm0_default_custom>;
    pinctrl-1 = <&pwm0_sleep_custom>;
    pinctrl-names = "default", "sleep";
    status = "okay";
};
/ {
    pwmleds {
        compatible = "pwm-leds";
        pwm_led0: pwm_led_0 {
            pwms = <&pwm0 0 PWM_MSEC(20) PWM_POLARITY_INVERTED>;
        };
    };
};