Hi,
I am trying to switch on-off a piezo buzzer though ble using the ble_app_blinky example.
i modified the code such that
led_0 show advertising
led_2 show connection
pin 8 show buzzer pin
Problem: the application runs correctly and connects with app but when i send the led_on command from app , the device automatically disconnect.
i have checked some threads and found out there is problem with pwm turning off.
#define ADVERTISING_LED BSP_BOARD_LED_0 /**< Is on when device is advertising. */
#define CONNECTED_LED BSP_BOARD_LED_2 /**< Is on when device has connected. */
#define LEDBUTTON_LED 8 /**< LED to be toggled with the help of the LED Button Service. */
#define LEDBUTTON_BUTTON BSP_BUTTON_0 /**< Button that will trigger the notification event with the LED Button Service */
uint32_t value; //for buzzer volume
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;
}
void buzz_config(void){
/* 2-channel PWM, 200Hz, output on DK LED pins. */
app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_1CH(250L,LEDBUTTON_LED);
/* Initialize and enable PWM. */
app_pwm_init(&PWM1,&pwm1_cfg,pwm_ready_callback);
pwm1_cfg.pin_polarity[0] = APP_PWM_POLARITY_ACTIVE_HIGH;
app_pwm_enable(&PWM1);
app_pwm_channel_duty_set(&PWM1, 0, 0);
}
void buzz_on(){
for (uint8_t i = 0; i < 40; ++i)
{
value = (i < 20) ? (i * 5) : (100 - (i - 20) * 5);
ready_flag = false;
while (app_pwm_channel_duty_set(&PWM1, 0, value) == NRF_ERROR_BUSY);
nrf_delay_ms(25);
}
}
static void led_write_handler(uint16_t conn_handle, ble_lbs_t * p_lbs, uint8_t led_state)
{
if (led_state)
{
buzz_on();
}
else
{
app_pwm_channel_duty_set(&PWM1, 0, 0);
}
}
int main(void)
{
// Initialize.
log_init();
leds_init();
timers_init();
buttons_init();
power_management_init();
ble_stack_init();
gap_params_init();
gatt_init();
services_init();
advertising_init();
conn_params_init();
buzz_config();
// Start execution.
//NRF_LOG_INFO("Blinky example started.");
advertising_start();
// Enter main loop.
for (;;)
{
idle_state_handle();
}
}
Please help me for the same. thanks
