Unsupported Pin error when using pins on Port 1 of the nRF52840Dongle

[RodWatt]

Hi,

I am using the nRF52840 dongle and am seeing problems when I try to use port 1 pins.

For instance, if I try to write to pin P1.01, 

gpio_pin_set(dev, 32, 1);

I see this error

ASSERTION FAIL [(cfg->port_pin_mask & (gpio_port_pins_t)(1UL << (pin))) != 0U] @ WEST_TOPDIR/zephyr/include/drivers/gpio.h:750
        Unsupported pin
[00:00:04.584,503] <err> os: r0/a1:  0x00000004  r1/a2:  0x000002ee  r2/a3:  0x00000001
[00:00:04.584,533] <err> os: r3/a4:  0x00013b0a r12/ip:  0x2000124c r14/lr:  0x000023c9
[00:00:04.584,533] <err> os:  xpsr:  0x61000000
[00:00:04.584,564] <err> os: Faulting instruction address (r15/pc): 0x00010570
[00:00:04.584,564] <err> os: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
[00:00:04.584,564] <err> os: Current thread: 0x200012e0 (unknown)
[00:00:04.635,345] <err> fatal_error: Resetting system

I seem to be able to write to pins on port 0, i.e. pins with a number less than 32 but unable to write above 32.

How do I enable this?

Rod

[Kenneth]

I guess pin32 belong to port1, so I suspect you need to also use device_get_binding(PORT1).

[RodWatt]

Yes, its port P1.01. Sorry, I don't quite follow your explanation. Please can you tell me how I can write to this pin?

[RodWatt]

No, i get an error

../src/main.c:672:27: error: 'PORT1' undeclared (first use in this function)
  672 |  dev = device_get_binding(PORT1);
      |                           ^~~~~
../src/main.c:672:27: note: each undeclared identifier is reported only once for each function it appears in

[Kenneth]

Sorry, likely it is device_get_binding("PORT1") or possible device_get_binding("PORT_1")

Best regards,
Kenneth

[RodWatt]

Hi Kenneth,

Both versions, ("PORT1") or ("PORT_1") compile and run however return NULL.

my code

dev = device_get_binding("PORT1");
	if (dev == NULL) {
		printk("Device Returned NULL\n");
		return;
	}

prints "Device Returned NULL"

Rod

[Kenneth]

That was weird, I was looking at this;
https://devzone.nordicsemi.com/f/nordic-q-a/64225/uncontrollable-pins-in-nrf52840-gpio-port-1 

Maybe you can spot the problem based on that code?

Are you using the correct board for building?

Best regards,
Kenneth

[RodWatt]

Ok, I have taken this code and simplified it. (Im just using one pin and have removed the while loop)

This is what it looks like now.

#include <zephyr/types.h>
#include <stddef.h>
#include <errno.h>

#include <zephyr.h>
#include <sys/printk.h>
#include <device.h>
#include <devicetree.h>
#include <drivers/gpio.h>


//GPIO for Relay Ctl: port 1 pins 0-5
#define rly1CtlPin0  0

//100ms delay
#define SLEEP_MS   100

struct device *gpio1dev;

void main(void)
{
  gpio1dev = device_get_binding("GPIO_1");
  if(gpio1dev == NULL)
    printk("Uh oh! Something's wrong with the gpio devices!\n");

  gpio_pin_configure(gpio1dev, rly1CtlPin0, GPIO_OUTPUT_LOW);


    gpio_pin_set(gpio1dev, rly1CtlPin0, 1);
    printk("rly1CtlPin0 is ON\n");
    k_msleep(10*SLEEP_MS);

}

This runs as expected.

I then try to move the pin to pin 47 (P1.15) and replace gpio1dev = device_get_binding("GPIO_1"); with gpio1dev = device_get_binding("PORT_1"); as suggested, code now like this

#include <zephyr/types.h>
#include <stddef.h>
#include <errno.h>

#include <zephyr.h>
#include <sys/printk.h>
#include <device.h>
#include <devicetree.h>
#include <drivers/gpio.h>


//GPIO for Relay Ctl: port 1 pins 0-5
#define rly1CtlPin0  47

//100ms delay
#define SLEEP_MS   100

struct device *gpio1dev;

void main(void)
{
  gpio1dev = device_get_binding("PORT_1");
  if(gpio1dev == NULL)
    printk("Uh oh! Something's wrong with the gpio devices!\n");

  gpio_pin_configure(gpio1dev, rly1CtlPin0, GPIO_OUTPUT_LOW);


    gpio_pin_set(gpio1dev, rly1CtlPin0, 1);
    printk("rly1CtlPin0 is ON\n");
    k_msleep(10*SLEEP_MS);

}

I am getting this error 

uart:~$ *** Booting Zephyr OS build v2.3.0-rc1-ncs1  ***
Uh oh! Something's wrong with the gpio devices!
ASSERTION FAIL [(cfg->port_pin_mask & (gpio_port_pins_t)(1UL << (pin))) != 0U] @ WEST_TOPDIR/zephyr/include/drivers/gpio.h:750
        Unsupported pin
[00:00:00.026,184] <err> os: r0/a1:  0x00000004  r1/a2:  0x000002ee  r2/a3:  0x00000001
[00:00:00.026,214] <err> os: r3/a4:  0x00011c52 r12/ip:  0x200011b8 r14/lr:  0x00001b81
[00:00:00.026,214] <err> os:  xpsr:  0x61000000
[00:00:00.026,214] <err> os: Faulting instruction address (r15/pc): 0x0000eab0
[00:00:00.026,245] <err> os: >>> ZEPHYR FATAL ERROR 4: Kernel panic on CPU 0
[00:00:00.026,245] <err> os: Current thread: 0x2000124c (unknown)
[00:00:00.077,209] <err> fatal_error: Resetting system

[Kenneth]

So it looks like you should use GPIO_1, not PORT_1. My mistake, I was thinking gpio port 1 in my head. 

Also have in mind that "pin32" is actually the first pin on gpio1. So to control pin32 you need to use GPIO_1 with pin 0, or pin47 would be pin 15 on GPIO_1 . So rly1CtlPin0 should be set to 15 in your case I expect.

Best regards,
Kenneth

[RodWatt]

Thanks Kenneth,

I initially used GPIO_1 but when that failed, I tried PORT_1.

The mistake I was making was to use pin 47 instead of pin 15. All working now.

Thanks again,
Rod