I have a question about the problem of merging pwm with ble_app_uart.

[schosdas]

Hello, everyone.

I learned about Bluetooth communication through the example of ble_app_uart. I learned about Bluetooth communication through the example of bl_app_uart. And I used the pwm_library to use the buzzer.  There is no problem using the buzzer in the pwm_library. And we merged this into bl_app_uart. However, the buzzer operates in this code, but the BLE does not.

The following is a section on the PWM in the main().

#define buzzer_pin  25

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()
{
    //PWM setting
    ret_code_t err_code;` 
  
    app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_1CH(1500, buzzer_pin); //period_in_us(sound), pin

    /* 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); 
    
    for(;;)
    {
       //PWM
       ready_flag = false;
       //wait for callback
       while (app_pwm_channel_duty_set(&PWM1, 0, 10) == NRF_ERROR_BUSY); //p_instance, channel, duty cycle(%)
       app_pwm_enable(&PWM1); //start pwm
    }
}

Can I get a solution to this problem?

Thank you.

[Jared]

Hi,

I can't see any Softdevice related code from the code that you've shared. Have you remembered to initialize the Softdevice properly and implemented the necessary functions and event handlers?  

regards

Jared