GPIOTE repeated IRQ

[StefXinet]

Hello,

I need to handle 2 buttons so I configured GPIOTE. The issue I'm facing is that this IRQ occurs only once, when I press both buttons for the first time.

void main( void ) {
	ret_code_t err_code;
	nrf_drv_gpiote_in_config_t in_config = {
		.sense = NRF_GPIOTE_POLARITY_HITOLO,						// Transition that triggers the interrupt. */
		.pull = NRF_GPIO_PIN_NOPULL,									// Pulling mode. */
		.is_watcher = false,												// True when the input pin is tracking an output pin.
		.hi_accuracy = false,											// True when high accuracy (IN_EVENT) is used.
		.skip_gpio_setup = false										// Change GPIO configuration
	};
	// Hardware init
	nrf_gpio_cfg( PUSH_A,												// pin_number
					  NRF_GPIO_PIN_DIR_INPUT,							// Input.
					  NRF_GPIO_PIN_INPUT_CONNECT,						// Connect input buffer.
					  NRF_GPIO_PIN_NOPULL,								// Pin pull-up resistor disabled.
					  NRF_GPIO_PIN_S0S1,									// Standard '0', standard '1'.
					  NRF_GPIO_PIN_SENSE_LOW							// Pin sense low level.
					);
	nrf_gpio_cfg( PUSH_B,												// pin_number
					  NRF_GPIO_PIN_DIR_INPUT,							// Input.
					  NRF_GPIO_PIN_INPUT_CONNECT,						// Connect input buffer.
					  NRF_GPIO_PIN_NOPULL,								// Pin pull-up resistor disabled.
					  NRF_GPIO_PIN_S0S1,									// Standard '0', standard '1'.
					  NRF_GPIO_PIN_SENSE_LOW							// Pin sense low level.
					);
	err_code = nrf_drv_gpiote_init();
	APP_ERROR_CHECK( err_code );
	err_code = nrf_drv_gpiote_in_init( PUSH_A, &in_config, vISR_Push_A );
	APP_ERROR_CHECK( err_code );
	err_code = nrf_drv_gpiote_in_init( PUSH_B, &in_config, vISR_Push_B );
	APP_ERROR_CHECK( err_code );

	// IRQ enable
	nrf_drv_gpiote_in_event_enable( PUSH_A, true );
	nrf_drv_gpiote_in_event_enable( PUSH_B, true );
	
	// main LOOP
	while(1);
	return;
}

/* ISR PushButton */
static void vISR_Push_A( nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action ) {
    // some code here
    SEGGER_RTT_printf( 0, "push A\n");
	return;
}

/* ISR PushButton */
static void vISR_Push_B( nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action ) {
    // some code here
    SEGGER_RTT_printf( 0, "push B\n");
	return;
}

The ISR is called only at the first pushbutton pression. I'm sure that there is something missing, please can you help me?

[Kenneth]

Hi,

Seems to work here, but I used pin toggling instead in callback handlers (and NRF_GPIO_PIN_PULLUP and set GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS 2 in sdk_config). Maybe there is something wrong with SEGGER_RTT_printf() setup? I used pin 13 and 14 on a nRF52-DK as inputs.

Kenneth

[StefXinet]

Hello,

Kenneth said:

I used pin toggling instead in callback handlers (and NRF_GPIO_PIN_PULLUP

yes, I use NRF_GPIO_PIN_NOPULL because I use external resistor

Kenneth said:

and set GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS 2 in sdk_config)

I also set this option to = 2.

Kenneth said:

Maybe there is something wrong with SEGGER_RTT_printf() setup?

I'm sure that it works, because it prints "push A" and "push B" only once, when I press the buttons for the first time.

[Kenneth]

Maybe there is something wrong with the pins, what pins are you using here?

Kenneth

[StefXinet]

I'm using PIN 16 and 18, but I found a mistake on the schematic, so the fault was on the hardware.

The code I wrote is working well!