PWM with a piezo buzzer,How can I change the PWM frequency?

[Mike]

I use the nrf51822qfaa,s110 v8.00,SDK V10.0. I use PWM module with a piezo buzzer. Now I need change the buzzer frequency, How can I change the PWM frequency?

for example:

/* 2-channel PWM, 200Hz, output on DK LED pins. */
app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_2CH(5000L, BSP_LED_0, BSP_LED_1);

[Ole Bauck]

You cannot change the PWM frequency without un-initializing and then initialize the PWM instance again.

[Ole Bauck]

Looks good, maybe you should also change uin16_t freq to uint16_t period_us for better readability ;)

You actually don't have to call app_pwm_disable() either as this is done in app_pwm_uninit().