PWM Can't Stop

[Arjun_arj]

AfterIi stop pwm and uninit pwm, I can't disable a pin left high by the PWM. I am using sdk16 with softdevice 6.0.0 proximity example.

[Sigurd]

Hi,

Could you post the code you use to disable the pin?

[Arjun_arj]

ret_code_t err_code;

app_pwm_disable(&PWM1);

err_code = app_pwm_uninit(&PWM1);
APP_ERROR_CHECK(err_code);

nrf_gpio_cfg_output(BUZZER);
nrf_gpio_pin_clear(BUZZER);

ret_code_t app_pwm_uninit(app_pwm_t const * const p_instance)
{
app_pwm_cb_t * p_cb = p_instance->p_cb;

if (p_cb->state == NRFX_DRV_STATE_POWERED_ON)
{
app_pwm_disable(p_instance);
}
else if (p_cb->state == NRFX_DRV_STATE_UNINITIALIZED)
{
return NRF_ERROR_INVALID_STATE;
}
pwm_dealloc(p_instance);

p_cb->state = NRFX_DRV_STATE_UNINITIALIZED;
return NRF_SUCCESS;
}

[Arjun_arj]

void pwm_stop(void) {
ret_code_t err_code;

app_pwm_disable(&PWM1);

err_code = app_pwm_uninit(&PWM1);
APP_ERROR_CHECK(err_code);
nrf_gpio_cfg_output(BUZZER);
nrf_gpio_pin_clear(BUZZER);

}

[Sigurd]

Hi,

1) So you are trying to set the pin low?

2) Do you get any error-codes returned somewhere?

3) What pin number is "BUZZER" ?

4) Maybe it's the buzzer that is pulling the pin high ? 

[Arjun_arj]

The buzzer pin number is 20 . Not gtting any error code

[Sigurd]

Are you using a nRF52832-DK?

Note that pin 20 is connected to LED4.

Do you see the same issue with e.g. pin 4 ?