PWM cannot set to 125khz frequency

[konsang]

Hi, 

I am using the nrf-52840 DK.

I modified the pwm_library to output 125khz frequency.

app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_2CH(125000L, NRF_GPIO_PIN_MAP(1,0) , NRF_GPIO_PIN_MAP(1,3));

I check the oscilloscope, the IC cannot generate such high frequency PWM.

Please advise how to set the PWM to generate 125kHz fequency.

Thanks

[Kenneth]

APP_PWM_INSTANCE(PWM1,1);                   // Create the instance "PWM1" using TIMER1.

static volatile bool ready_flag;            // A flag indicating PWM status.

void pwm_ready_callback(uint32_t pwm_id)    // PWM callback function
{
    ready_flag = true;
}

int main(void)
{
    ret_code_t err_code;

    /* 2-channel PWM, 125kHz, output on DK LED pins. */
    app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_2CH(8L, BSP_LED_0, BSP_LED_1);

    /* 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);
    
    app_pwm_channel_duty_set(&PWM1, 0, 50);
    app_pwm_channel_duty_set(&PWM1, 1, 50);

    while (true)
    {        
    }

}

[konsang]

Hi Kenneth,

Got it and Thanks.

Br,

KonSang