Reading multiple events with GPIOTE

[dooder]

I'm trying to test out pin change interrupts using the PCA10028 dev board. I'm using two buttons to turn off and on an LED. The code below is only generating events from button1. I'm trying to illuminate and LED when button1 is pressed and turn it off when button2 is pressed. So far, I'm only able to illuminate the LED, not turn it off. What am I missing? I'm using the nrf51422 with no SD. Thanks for the help.

static void button_gpiote_event_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {

if(pin & BUTTON2)//turn off led { //app_sched_event_put(NULL,0, led_clear_event); nrf_gpio_pin_set(LED_PIN1); }

else if(pin & BUTTON1) //light up led { nrf_gpio_pin_clear(LED_PIN1); //app_sched_event_put(NULL,0, led_set_event); } }

void gpiote_handler_init() { if(!nrf_drv_gpiote_is_init()) { nrf_drv_gpiote_init(); } }

void gpiote_button_init() {

nrf_drv_gpiote_in_config_t gpiote_button1 = GPIOTE_CONFIG_IN_SENSE_TOGGLE(false); gpiote_button1.pull = NRF_GPIO_PIN_PULLUP;

nrf_drv_gpiote_in_config_t gpiote_button2 = GPIOTE_CONFIG_IN_SENSE_TOGGLE(false);

gpiote_button2.pull = NRF_GPIO_PIN_PULLUP;

nrf_drv_gpiote_in_init(BUTTON1, &gpiote_button1, button_gpiote_event_handler); nrf_drv_gpiote_in_init(BUTTON2, &gpiote_button2, button_gpiote_event_handler);

nrf_drv_gpiote_in_event_enable(BUTTON1, true);

nrf_drv_gpiote_in_event_enable(BUTTON2, true);

}

/** * @brief Function for application main entry. */

int main(void) {

pin_config();

scheduler_init();

gpiote_handler_init();

gpiote_button_init();

while (true)
{ 			
app_sched_execute();	
}}

[Susheel Nuguru]

You know that there is app_button library available at SDKXX\components\libraries\button. When you press a button, most likely there is debounce causing un-necessary events. App_button library takes care of this debounce. Anyways, if you do not worry about the debounce then change your button handler little like below and it should work.

static void button_gpiote_event_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {

if((pin == BUTTON2) && (NRF_GPIOTE_POLARITY_HITOLO == action))//turn off led 
{ 
//app_sched_event_put(NULL,0, led_clear_event); 
nrf_gpio_pin_set(LED_PIN1); 
}

else if((pin == BUTTON1) && (NRF_GPIOTE_POLARITY_HITOLO == action)) //light up led 
{ 
nrf_gpio_pin_clear(LED_PIN1); 
//app_sched_event_put(NULL,0, led_set_event); 
} }

void gpiote_handler_init() { 
if(!nrf_drv_gpiote_is_init()) 
{ nrf_drv_gpiote_init(); 
} }

[dooder]

I have tried using the app_button handler and am still seeing no success... Any ideas?

void pin_config() { nrf_gpio_cfg_output(LED_PIN1); nrf_gpio_pin_set(LED_PIN1); nrf_gpio_cfg_input(BUTTON1, NRF_GPIO_PIN_PULLUP); nrf_gpio_cfg_input(BUTTON2, NRF_GPIO_PIN_PULLUP); }

static void lfclk_request(void)//this is only needed when a Soft Device isn't used. { uint32_t err_code = nrf_drv_clock_init(NULL); APP_ERROR_CHECK(err_code); nrf_drv_clock_lfclk_request(); }

static void timer_init(void) { APP_TIMER_APPSH_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, true); }

static void button_gpiote_event_handler(uint8_t pin_no, uint8_t button_action) { if ((pin_no == BUTTON2) && (button_action == APP_BUTTON_PUSH))//turn off led { nrf_gpio_pin_set(LED_PIN1); } else if ((pin_no == BUTTON1) && (button_action == APP_BUTTON_PUSH)) //light up led { nrf_gpio_pin_clear(LED_PIN1); } }

void button_init() { static app_button_cfg_t buttons [] = { {BUTTON1, APP_BUTTON_ACTIVE_LOW, NRF_GPIO_PIN_PULLUP, button_gpiote_event_handler}, {BUTTON2, APP_BUTTON_ACTIVE_LOW, NRF_GPIO_PIN_PULLUP, button_gpiote_event_handler}};

app_button_init(buttons, BUTTON_COUNT, BUTTON_DEBOUNCE_DELAY);

}

/**

• @brief Function for application main entry. */ int main(void) { pin_config(); scheduler_init(); lfclk_request(); timer_init(); APP_GPIOTE_INIT(GPIOTE_MAX_USERS);

  //gpiote_handler_init(); //gpiote_button_init(); button_init(); app_button_enable();

// timer_start(); while (true) { app_sched_execute(); } } /** @} */