RE: nRF51822 s110 custom event handlers

Inspectron — Wed, 21 Jan 2015 12:33:31 GMT

If I want always to send YOUR_VALUE. Where I have to call ble_lbs_on_button_change()?

RE: nRF51822 s110 custom event handlers

Stian Røed Hafskjold — Fri, 09 Jan 2015 15:12:07 GMT

Since you already started with the nAN-36 led-button example, you can use the button characteristic to send out the notification.

In the led-button example the ble_lbs_on_button_change() in ble_lbs.c is called by the button_event_handler() handler in main.c. The button event handler is called whenever a change in the buttons registered in the gpiote_init() function changes.

Likewise, you can call the ble_lbs_on_button_change() from any other interrupt handlers. If you are going to use the ADC, its interrupt handler is ADC_IRQHandler()

If you use the led-button example as a starting point, and you add the following code to main.c, it will use a timer to sample the variable value, then send a notification using the ble_lbs_on_button_change().

If you want to send a value from I2C, the I2C creates an event when there is a new variable in the TXD register. Then you can use this event to call ble_lbs_on_button_change(), instead of the timeout event. Similarly, the ADC has its own event when a value has been sampled.

#define CUSTOM_TIMER_MEAS_INTERVAL     APP_TIMER_TICKS(2000, APP_TIMER_PRESCALER)
static app_timer_id_t                  m_custom_timer_id;

// The timeout handler that calls the ble_lbs_on_button_change() function 
// with an arbitrary value
static void custom_timer_meas_timeout_handler(void * p_context)
{
	ble_lbs_on_value_change(&m_lbs, YOUR_VALUE);
}

// Initialize the timer to call the timeout handler
static void timers_init(void)
{
    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, true);
    uint32_t err_code;
	err_code = app_timer_create(&m_custom_timer_id,
                                APP_TIMER_MODE_REPEATED,
                                custom_timer_meas_timeout_handler);
    APP_ERROR_CHECK(err_code);
}

// Start the timer
static void timers_start(void)
{
	uint32_t err_code;
	err_code = app_timer_start(m_custom_timer_id, CUSTOM_TIMER_MEAS_INTERVAL, NULL);
    APP_ERROR_CHECK(err_code);
}