How to config PWM driving capability use app_pwm_example?

[suheng2018007]

Dear Sir:

    I use ble_app_uart example , i want use pwm to driver the  FR Port ,Peripheral load. the  Peripheral load is pulled up to battery.

when driver the load ,the pwm can't pull down the Circuit 。 if no connect the load，the pwm can work normal。

so，how to config the pwm output driving capability ？

the code i use is

static void pwm_init(void)
{
ret_code_t err_code;
app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_1CH(10000L, PIN_OUT_MOTOR);
pwm1_cfg.pin_polarity[0] = APP_PWM_POLARITY_ACTIVE_HIGH;

nrf_gpio_cfg(PIN_OUT_MOTOR,
NRF_GPIO_PIN_DIR_OUTPUT,
NRF_GPIO_PIN_INPUT_CONNECT,
NRF_GPIO_PIN_NOPULL,
NRF_GPIO_PIN_S0S1,
NRF_GPIO_PIN_NOSENSE);

/* Switch the polarity of the second channel. */
//pwm1_cfg.pin_polarity[1] = APP_PWM_POLARITY_ACTIVE_HIGH;
/* Initialize and enable PWM. */
err_code = app_pwm_init(&PWM1,&pwm1_cfg,pwm_ready_callback);
APP_ERROR_CHECK(err_code);
app_pwm_enable(&PWM1);
dutyCycle = 50;
app_pwm_channel_duty_set(&PWM1, 0, dutyCycle);
}

please help me 

[MartinBL]

Hi,

1. What kind of load is this?
2. Do you have an oscilloscope so you can see what is going on with the voltage?
3. Is your application otherwise behaving as expected? 
4. You can try to use NRF_GPIO_PIN_H0H1 instead of NRF_GPIO_PIN_S0S1 to enable the pin to sink and source more current.