clear external interrupt

RE: clear external interrupt

rushin — Thu, 21 Jan 2016 14:44:49 GMT

ok thanks!

RE: clear external interrupt

bjorn-spockeli — Thu, 21 Jan 2016 14:41:57 GMT

No, the pin that detects a change in its logic level first will generate an interrupt first, which in turn is handled by gpiote_evt_handler.

RE: clear external interrupt

rushin — Thu, 21 Jan 2016 13:58:17 GMT

then interrupt for INTERRUPT_PIN will be served first

RE: clear external interrupt

rushin — Thu, 21 Jan 2016 13:57:38 GMT

ret_code = nrf_drv_gpiote_in_init(INTERRUPT_PIN, &config, gpiote_evt_handler); ret_code = nrf_drv_gpiote_in_init(INTERRUPT_PIN1, &config, gpiote_evt_handler);

like if i have defined two interrupt for INTERRUPT_PIN,INTERRUPT_PIN1

RE: clear external interrupt

bjorn-spockeli — Thu, 21 Jan 2016 13:51:19 GMT

You can't. The interrupt that is detected first is handled first.

RE: clear external interrupt

rushin — Thu, 21 Jan 2016 13:48:07 GMT

yes. I am saying about it

RE: clear external interrupt

bjorn-spockeli — Thu, 21 Jan 2016 13:45:37 GMT

Do you mean setting which interrupt that should be handled first?

RE: clear external interrupt

rushin — Thu, 21 Jan 2016 12:54:51 GMT

ok. i have defined two external interrupt. can you tell me how to assign priority to interrupt??

RE: clear external interrupt

bjorn-spockeli — Wed, 20 Jan 2016 09:49:22 GMT

You do not need the delay. When you callsd_power_system_off() the chip will be in SYSTEM OFF mode untill it is woken-up. In System OFF the chip will only wake-up if the level on an input pin(i.e. pin that has sense enabled) goes from Low to High.

RE: clear external interrupt

rushin — Tue, 19 Jan 2016 14:43:17 GMT

can we set like that interrupt's certain condition run for certain time??

RE: clear external interrupt

rushin — Tue, 19 Jan 2016 14:32:35 GMT

hello there i have updated code. my problem : when i press button LED turn on,and i release button, LED turn off. now i want to run else condition more time. so i add delay. so now when i release button after some delay LED off.

now i am doing same thing for sd_power_system_off(). but my nrf51822 don't off for same time that LED takes. can you tell me solution??

so my main aim is to put nrf51822 in system off mode for more time

RE: clear external interrupt

bjorn-spockeli — Mon, 18 Jan 2016 15:26:53 GMT

Happy to help. Yes, if you want to put the chip in SYSTEM OFF mode( i.e. the chip can only woken up by changing the pin level of an input pin externally) then the above code should work.

RE: clear external interrupt

rushin — Mon, 18 Jan 2016 15:10:09 GMT

your answers helped me lot in learning nrf51822. thanks for it. nordic team is very helpful

RE: clear external interrupt

rushin — Mon, 18 Jan 2016 15:07:04 GMT

void delay_ms(unsigned int k) {

unsigned int i,j;


for(i=0;i<12750; i++)
{

for(j=0;j<i;j++); }
}

void gpiote_evt_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
    switch(action)
    {
			 case NRF_GPIOTE_POLARITY_TOGGLE:
            if(nrf_drv_gpiote_in_is_set(INTERRUPT_PIN))
            {
               nrf_drv_gpiote_out_set(LED_3);
						
            }
            else
							
            {  nrf_drv_gpiote_out_clear(LED_3);
				       sd_power_system_off();
             
								delay_ms(10000000);
						   delay_ms(10000000);
            }
            break;
        default:
           
            break;
    }
}

RE: clear external interrupt

rushin — Mon, 18 Jan 2016 15:04:21 GMT

one more question. i want to put in ble in sleep mode using button

RE: clear external interrupt

rushin — Mon, 18 Jan 2016 15:03:13 GMT

thanks its working

RE: clear external interrupt

bjorn-spockeli — Mon, 18 Jan 2016 14:59:29 GMT

You have to set the input pin to generate events on both High-to-Low and Low-to-High transitions(NRF_GPIOTE_POLARITY_TOGGLE). In the event handler you have to check if the pin is set( i.e. HIGH ) or not and based on that clear or set the LED.

void gpiote_evt_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
    switch(action)
    {
        case NRF_GPIOTE_POLARITY_TOGGLE:
            if(nrf_drv_gpiote_in_is_set(INTERRUPT_PIN))
            {
                nrf_drv_gpiote_out_set(LED_3);
            }
            else
            {
                nrf_drv_gpiote_out_clear(LED_3);
            }
            break;
        default:
            //do nothing
            break;
    }
}

MAIN:

In main you have to configure the input pin to generate the NRF_GPIOTE_POLARITY_TOGGLEevent when the pin state is changed.

int main(void)
{
    
    ret_code_t ret_code;
    
    // Initialize the GPIOTE Peripheral 
    ret_code = nrf_drv_gpiote_init();
    APP_ERROR_CHECK(ret_code);
    
    // Configure LED_3 pin as output
    nrf_drv_gpiote_out_config_t led_config = GPIOTE_CONFIG_OUT_TASK_LOW;
    
    // Initialize LED_3 pin as output
    ret_code =  nrf_drv_gpiote_out_init(LED_3, &led_config);
    APP_ERROR_CHECK(ret_code);
    
    
    
    // Configuration for Interrupt Pin
    nrf_drv_gpiote_in_config_t config =
    {
        .sense = NRF_GPIOTE_POLARITY_TOGGLE, 
        .pull = NRF_GPIO_PIN_PULLUP , 
        .is_watcher = false,
        .hi_accuracy = false
    };
        
    // Initialize Interrupt Pin
    ret_code = nrf_drv_gpiote_in_init(INTERRUPT_PIN, &config, gpiote_evt_handler);
    APP_ERROR_CHECK(ret_code);
    
    // Enable Interrupts from interrupt pin
    nrf_drv_gpiote_in_event_enable(INTERRUPT_PIN,true);
    
    
    while (true)
    {
        // Do nothing.
    }
}

RE: clear external interrupt

rushin — Mon, 18 Jan 2016 14:54:58 GMT

i also tried NRF_GPIOTE_POLARITY_TOGGLE. but its not working for me

RE: clear external interrupt

rushin — Mon, 18 Jan 2016 14:25:04 GMT

can't i make another case

case NRF_GPIOTE_POLARITY_LOTOHI:
					 nrf_drv_gpiote_out_set(LED_3);
				 break;

service routine??

RE: clear external interrupt

rushin — Mon, 18 Jan 2016 13:50:02 GMT

when i press button. interrupt generates and LED become on.but i want when button returns to its normal position LED become off. i don't want to use toggle function

RE: clear external interrupt

rushin — Mon, 18 Jan 2016 13:47:06 GMT

i know that. but i want to clear interrupt automatically.

RE: clear external interrupt

bjorn-spockeli — Mon, 18 Jan 2016 12:37:26 GMT

The leds on the nRF51 DK are active low, i.e. if the LED pin is high the led is OFF and if the LED pin is low the led is ON. This means that you have to use nrf_drv_gpiote_out_set(LED_3) to turn off the led.

RE: clear external interrupt

rushin — Sun, 17 Jan 2016 13:57:42 GMT

can you tell me how to clear interrupt automatically?

RE: clear external interrupt

rushin — Sun, 17 Jan 2016 13:56:51 GMT

int main(void) { uint32_t err_code; bool erase_bonds; ret_code_t ret_code;

        // Initialize.
     
        ble_stack_init();
        gap_params_init();
        services_init();
        advertising_init();
    	advertising_start();
        conn_params_init();
        
       
       
         ret_code = nrf_drv_gpiote_init();
       // APP_ERROR_CHECK(ret_code);
        
        // Configure LED_1 pin as output
        nrf_drv_gpiote_out_config_t led_config = GPIOTE_CONFIG_OUT_TASK_LOW;
        
        // Initialize LED_1 pin as output
        ret_code =  nrf_drv_gpiote_out_init(LED_3, &led_config);
      //  APP_ERROR_CHECK(ret_code);
    	    nrf_drv_gpiote_in_config_t config =
        {
            .sense = NRF_GPIOTE_POLARITY_HITOLO,
    			//.sense = NRF_GPIOTE_POLARITY_LOTOHI,
            .pull = NRF_GPIO_PIN_PULLUP , // NRF_GPIO_PIN_NOPULL
    		//.pull = NRF_GPIO_PIN_NOPULL ,
            .is_watcher = false,
            .hi_accuracy = false
        };
            
        // Initialize Interrupt Pin
        ret_code = nrf_drv_gpiote_in_init(INTERRUPT_PIN, &config, gpiote_evt_handler);
      APP_ERROR_CHECK(ret_code);
        
        // Enable Interrupts from interrupt pin
       nrf_drv_gpiote_in_event_enable(INTERRUPT_PIN,true);
        // Enter main loop.
        while(true)
        { 
           	
        }

}