Toggling P0.12 also toggles P0.11 on nRF52832 dev kit

Question

When I toggle pin 12, it toggles pin 11 as well. When I toggle pin 11, nothing happens. I also checked pins 13-18 to see if they were affected by both pin 11 & 12 and they weren't. I have no code but the following running. Is there some configuration I'm missing? 
 const struct device *mux_dev = device_get_binding("GPIO_0");
	gpio_pin_configure(mux_dev, 12, GPIO_OUTPUT | GPIO_ACTIVE_HIGH);

for(;;) {
 gpio_pin_toggle(mux_dev,12);
 k_sleep(K_MSEC(1000));
	} 
 Here are images of the pins 11 & 12 I'm scoping.

Vidar Berg · Accepted Answer

Hello,

It sounds like there may be a short between the pins, or have you already measured for continuity between them? If it is not a short, please try to program the hex file included below and see if you still get the same result.

0523.gpio_11_12_toggle_test.hex

You can program this hex file from the command line with nrfjprog or with the Programmer app in nRF connect for desktop.

With nrfjprog:

$ nrfjprog --program gpio_11_12_toggle_test.hex --chiperase --reset

Expected result with my hex file:

My test code (Note: fetching of the gpio binding is slightly different here as I used SDK v2.2.0)

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

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

const struct device *mux_dev = DEVICE_DT_GET(DT_NODELABEL(gpio0));

void main(void)
{
	int err;

	printk("Hello World! %s\n", CONFIG_BOARD);

	err = gpio_pin_configure(mux_dev, 11, GPIO_OUTPUT | GPIO_ACTIVE_HIGH | GPIO_OUTPUT_INIT_HIGH);
	if (err) {
		printk("gpio_pin_configure() failed. (%d)\n", err);
	}

	err = gpio_pin_configure(mux_dev, 12, GPIO_OUTPUT | GPIO_ACTIVE_HIGH | GPIO_OUTPUT_INIT_LOW);
	if (err) {
		printk("gpio_pin_configure() failed. (%d)\n", err);
	}

	for (;;) {
		err = gpio_pin_toggle(mux_dev,11);
		if (err) {
			printk("gpio_pin_toggle() failed. (%d)\n", err);
		}

		err = gpio_pin_toggle(mux_dev,12);
		if (err) {
			printk("gpio_pin_toggle() failed. (%d)\n", err);
		}

		k_sleep(K_MSEC(1000));
	}
}

Best regards,

Vidar

Toggling P0.12 also toggles P0.11 on nRF52832 dev kit

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