Issue in buzzer beep

[MARTIN FR]

Hello everyone ,

I have written the program for getting the buzzer Beep sound and then i compiled the program without any errors and warnings but i am not getting the beep sound ,i don't understand what is going wrong ,any suggesstions will be helpful for me

#define FREQ_HALF_NOTE_FACTOR 1.059463f

 void set_frequency_and_duty_cycle(uint32_t frequency, uint32_t duty_cycle_percent)
{
    
nrf_pwm_set_max_value((16000000 + (frequency / 2)) / frequency);
    
nrf_pwm_set_value(0, (16000000 / frequency) * duty_cycle_percent / 100);

}

void pwm_init()

{
    nrf_pwm_config_t pwm_config = PWM_DEFAULT_CONFIG;
    
    pwm_config.mode             = PWM_MODE_BUZZER_255;

    pwm_config.num_channels     = 1;

    pwm_config.gpio_num[0]      = 14;
    
    // Initialize the PWM library

    nrf_pwm_init(&pwm_config); 
   
}

/**@brief  Application main function.
 */
int main(void)
{
	float frequency = 440.0f;
	nrf_gpio_cfg_output(LED_1);
    
    // Start the external 16 MHz clock for a more accurate PWM frequency
    NRF_CLOCK->TASKS_HFCLKSTART = 1;
    
    pwm_init();
    
    while (true)
    {
        set_frequency_and_duty_cycle((uint32_t)(frequency + 0.5f), 50);
        
        frequency *= FREQ_HALF_NOTE_FACTOR;
        if(frequency > (440.0f * 4.0f)) frequency = 440.0f;
            
        nrf_gpio_pin_toggle(LED_1);
        	
        nrf_delay_ms(5000);
    }
}

Thank you

[MartinBL]

Hi. What kind of buzzer do you use? Are you able to confirm that your example is running properly on your board and outputting the correct signal? Is the LED toggling?

[MARTIN FR]

Hi, am using BUZZER ELEMENT STD 9KHZ this buzzer and i ahve conencted to pin 14 of nrf51DK , concerning my program its just got compiled but am not getting the LED toggling and am still looking for that issue

[MartinBL]

So since the LED does not toggle it means that your application is stuck somewhere. Are you able to run the basic LED blinky example from one of the SDKs? Are you using a custom board or a dev kit? Could it be that your external 16MHz crystal is not working properly?

[MARTIN FR]

no i have tested the Basic LED blink program it is working fine but if i flash this program am not getting any response and also i have erase the developement kit after that also nothing happen

[MartinBL]

Have you changed the example at all?

Is USE_WITH_SOFTDEVICE defined as '1' or '0'?

Have you debugged the code to see where the example stops?