nrf5340 blinky not working

[Jonas2023]

Hi,
I have tried to get the zephyr blinky example working for some days without succes. 

This is my custom board that i believe is working (because it shows up using nrf connect)

However when i flash the blinky example from the sample projects it does not blink. 

The current consumption of the board is odd, 1mA at 3V3 (4mA when programming) this seems normal when looking at other boards.

I am using the build configuration from "nrf5340dk_nrf5340_cpuapp". with a overlay to delete all pin definitions and redifine led0.

Did i make any obvious mistake? 
Thanks

Regards,

Jonas

Board schematic. used reference design from datasheet (design 3)
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf5340%2Fchapters%2Fref_circuitry.html 

my device overlay.

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/kernel.h>
#include <zephyr/drivers/gpio.h>

/* 1000 msec = 1 sec */
#define SLEEP_TIME_MS   1000

/* The devicetree node identifier for the "led0" alias. */
#define LED0_NODE DT_ALIAS(led0)

/*
 * A build error on this line means your board is unsupported.
 * See the sample documentation for information on how to fix this.
 */
static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(LED0_NODE, gpios);

int main(void)
{
	int ret;

	if (!gpio_is_ready_dt(&led)) {
		return 0;
	}

	ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE);
	if (ret < 0) {
		return 0;
	}

	while (1) {
		ret = gpio_pin_toggle_dt(&led);
		if (ret < 0) {
			return 0;
		}
		k_msleep(SLEEP_TIME_MS);
	}
	return 0;
}

default blinky sample

[Maria Gilje]

Hello,

Thank you for your patience.

We need to find out if this is a hardware issue or not.

Could you try to reproduce this on the nRF5340 DK?

1. Build the project with the same overlay file for the DK as you use for your custom board.

2. Flash the nRF5340 DK.

3. Connect a logic analyzer or oscilloscope to the P1.09 pin to see if you get any output.

4. Report back with your findings.

Best regards,

Maria

[Jonas2023]

Hi, thank you for the answer.

i do unfortunantly not have the DK on hand. So that is not possible. However i have another board based on the BL5340 module, where the same issue persist (i can find the module on the nrf connect screen, but the IO pin is not switching.

Regards Jonas 

[Maria Gilje]

Hi Jonas,

I see. Maybe a simpler check of the pins is necessary.

You could try to control the IO pin with the nrfx driver. To do this, you need to disable the Zephyr driver with CONFIG_GPIO=n in your prj.conf. Configure the GPIOs with nrf_gpio_cfg_output and set the pin with nrf_gpio_pin_set.

BR,

Maria

[Jonas2023]

Hi again,
Using the following code there is still nothing happening on the board.
Do you think this is an hardware issue? 

Thanks, 

Jonas

#include <nrfx_gpiote.h>
#include <nrfx_glue.h>

#define LED_PIN_MAP    NRF_GPIO_PIN_MAP(1,9)

int main(int argc, char **argv) {
    
    nrf_gpio_cfg_output(LED_PIN_MAP);


    while(1) {
        for (uint32_t i = 0; i < 0xFFFFFF; i++){
			// crude delay	
		}
        nrf_gpio_pin_set(LED_PIN_MAP);
        
		for (uint32_t i = 0; i < 0xFFFFFF; i++){
			// crude delay	
		}
        nrf_gpio_pin_clear(LED_PIN_MAP);
        
    }

    return 0;
}

[Maria Gilje]

Hello Jonas,

Have you tested the new code on the BL5340 module as well?

If so, I will get an extra couple of eyes on this, and get back to you soon.

Best regards,

Maria

[Maria Gilje]

Hi Jonas,

You can do a couple of more tests:

• Test several of the pins for each board the same way as in your previous reply.
• If you are able to, run both boards with RTT logging.

BR,

Maria