ncs gpiote interrupt issue

[billywalton]

Hi,

Using the SDK 17 library, i had the following code running fine:

	//Setup the external interupt and timer interupt
	//Pin Interupt setup
    err_code = nrf_drv_gpiote_init();
    APP_ERROR_CHECK(err_code);
    
    nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(true);
    in_config.sense = NRF_GPIOTE_POLARITY_HITOLO;
    in_config.pull = NRF_GPIO_PIN_PULLUP;
    //in_config.hi_accuracy = true;

    err_code = nrf_drv_gpiote_in_init(IO_NET_RX, &in_config, NET_INTERRUPT);
    APP_ERROR_CHECK(err_code);

    nrfx_gpiote_in_event_enable(IO_NET_RX, true);
    ......
    
    static void NET_INTERRUPT(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
    {
        nrf_drv_timer_clear(&NET_TIMER);
    	nrf_drv_timer_disable(&NET_TIMER);
    	nrf_drv_gpiote_in_event_disable(IO_NET_RX);
        ...
    }
    

Now i am porting it to ncs 1.9.0, i have changed the code to:

	//Setup the external interupt and timer interupt
	//Pin Interupt setup
	// ** IN NCS THIS SEEMS TO ALREADY BE INITIALISED
	if (!nrfx_gpiote_is_init()){
    	err_code = nrfx_gpiote_init(2);
		if (err_code != NRFX_SUCCESS) {
			printk("Failed to init gpiote (err %d)\n", err_code);
			return;
		}
	}	
    
    nrfx_gpiote_in_config_t in_config = NRFX_GPIOTE_CONFIG_IN_SENSE_TOGGLE(true);
    in_config.sense = NRF_GPIOTE_POLARITY_HITOLO;
    in_config.pull = NRF_GPIO_PIN_PULLUP;
    //in_config.hi_accuracy = true;

    err_code = nrfx_gpiote_in_init(IO_NET_RX, &in_config, NET_INTERRUPT);
     if (err_code != NRFX_SUCCESS) {
		printk("Failed to init gpiote in (err %d)\n", err_code);
		return;
	}	

    nrfx_gpiote_in_event_enable(IO_NET_RX, true);	
    
    ......
    
    static void NET_INTERRUPT(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
    {
    	nrf_drv_gpiote_in_event_disable(IO_NET_RX);
        ...
    }
    

Upon running, i get the following zephr error:

(sorry, copy/paste doesnt seem to work from the nrf terminal)

Any pointers to what has not been setup correctly?

many thanks

[Håkon Alseth]

Hi,

 

Here's a simple example on how to use it, based on hello_world:

/*
 * Copyright (c) 2012-2014 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr.h>
#include <sys/printk.h>
#include <hal/nrf_gpio.h>
#include <nrfx_gpiote.h>

#define IO_NET_RX 13
#define LED_0 17

static void NET_INTERRUPT(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
	nrf_gpio_pin_toggle(LED_0);
}

void main(void)
{
	printk("Hello World! %s\n", CONFIG_BOARD);
	nrf_gpio_cfg_output(LED_0);
	uint32_t err_code;
	if (!nrfx_gpiote_is_init()){
    	err_code = nrfx_gpiote_init(2);
		if (err_code != NRFX_SUCCESS) {
			printk("Failed to init gpiote (err %d)\n", err_code);
			return;
		}
	}
	nrfx_gpiote_in_config_t in_config = NRFX_GPIOTE_CONFIG_IN_SENSE_TOGGLE(true);
	in_config.sense = NRF_GPIOTE_POLARITY_HITOLO;
	in_config.pull = NRF_GPIO_PIN_PULLUP;
	//in_config.hi_accuracy = true;

	err_code = nrfx_gpiote_in_init(IO_NET_RX, &in_config, NET_INTERRUPT);
	if (err_code != NRFX_SUCCESS) {
		printk("Failed to init gpiote in (err %d)\n", err_code);
		return;
	}

	nrfx_gpiote_in_event_enable(IO_NET_RX, true);
}

 

Here's my prj.conf:

CONFIG_GPIO=y
CONFIG_NRFX_GPIOTE=y
# Comment in this if you get mpu/stack faults on the uart
# CONFIG_MAIN_STACK_SIZE=4096

 

Could you check if this works on your end?

 

Kind regards,

Håkon

[billywalton]

Hi Håkon,

Thanks for your reply

After testing further, i found its actually a timer which is causing the problem, i also have the following code:

static void NET_TIMER_INTERRUPT(nrf_timer_event_t event_type, void* p_context)
{
	nrf_gpio_pin_toggle(IO_NET_DGB);
}


const nrfx_timer_t NET_TIMER = NRFX_TIMER_INSTANCE(2);

#define NET_SILENCE_POWER_DETECT_US	(8000ul)
static uint32_t NET_SILENCE_POWER_DETECT;

void init(void)	
{
	
	//Timer setup
	nrfx_timer_config_t timer_cfg = NRFX_TIMER_DEFAULT_CONFIG;

    timer_cfg.mode = NRF_TIMER_MODE_TIMER;
    timer_cfg.bit_width = NRF_TIMER_BIT_WIDTH_32;
    timer_cfg.frequency = NRF_TIMER_FREQ_8MHz;
    timer_cfg.interrupt_priority = 3; 

    err_code = nrfx_timer_init(&NET_TIMER, &timer_cfg, NET_TIMER_INTERRUPT);
    if (err_code != NRFX_SUCCESS) {
		printk("Failed to init timer (err %d)\n", err_code);
		return;
	}	
	
	//Reset the timer
	nrfx_timer_clear(&NET_TIMER);
	
	//Syncronise the start of the next packet
	NET_SILENCE_POWER_DETECT = nrfx_timer_us_to_ticks(&NET_TIMER, NET_SILENCE_POWER_DETECT_US);
	nrfx_timer_extended_compare(&NET_TIMER, NRF_TIMER_CC_CHANNEL0, (NET_SILENCE_POWER_DETECT/4), NRF_TIMER_SHORT_COMPARE0_STOP_MASK, true);
	
	//Enable Timer + External Interupt
	nrfx_timer_enable(&NET_TIMER);

}

This is the code causing the interrupt exception, the gpiote is working fine

my prj.conf contains

CONFIG_NRFX_TIMER2=y

Again, this code seems fine under the SDK 17

Regards

Billy

[billywalton]

Mapping the handler using the following:

IRQ_CONNECT(DT_IRQN(DT_NODELABEL(timer2)),
		    DT_IRQ(DT_NODELABEL(timer2), priority),
		    nrfx_isr, nrfx_timer_2_irq_handler, 0);

seems to have stopped the exceptions, but i dont seem to get the interrupt

[Håkon Alseth]

Hi,

 

billywalton said:

seems to have stopped the exceptions, but i dont seem to get the interrupt

With the IRQ handler mapped, I get a single interrupt on the NET_TIMER_INTERRUPT, as the timer short is set to this:

NRF_TIMER_SHORT_COMPARE0_STOP_MASK

Change it to:

NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK

And it will run continuously.

Did you remember to configure IO_NET_DBG pin as an output?

 

Kind regards,

Håkon

[billywalton]

Yes,

NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK

missed that - thanks