Cannot configure Port 1 Pin 8

RE: Cannot configure Port 1 Pin 8

IstvanS — Wed, 22 Jun 2022 06:07:37 GMT

That's right, thank you for pointing it out! I also should have noticed, my bad.

RE: Cannot configure Port 1 Pin 8

Einar Thorsrud — Tue, 21 Jun 2022 06:59:35 GMT

Hi,

My bad, I did not notice before that you are using the nRF52832. There is no port 1 on the nRF52832, so it is correct and expected that you get an error when trying to configure port 1 pins (as they do not exist).

RE: Cannot configure Port 1 Pin 8

IstvanS — Mon, 20 Jun 2022 12:11:45 GMT

I've tested it with a clean Blinky example project using my custom board and a clean Blinky example project using the PCA10040 dev kit (same SoC on both boards). Same error in all cases with port 1 pin. All works with a port 0 pin. Can there be something with the Blinky example? Can you also verify, that the Blinky example works/fails with a port 1 pin configured for GPIOTE?

(I'm using the nRF52832, SDK 17.1.0, SoftDevice S132 7.2.0)

RE: Cannot configure Port 1 Pin 8

IstvanS — Fri, 17 Jun 2022 08:40:17 GMT

No, this pin is not used anywhere else. It works with other pins, so it might be some "hidden" configuration or project related problem. I'll try it with a clean example project as well.

RE: Cannot configure Port 1 Pin 8

Einar Thorsrud — Fri, 17 Jun 2022 08:03:40 GMT

Some examples define pins outside of the board file, but I cannot say what is the case in your code without seeing it. Do you use your INT_PIN anywhere else? If you cannot find it, perhaps you can add some code in the implementation of nrf_drv_gpiote_in_init() that checks if pin P1.8 (40) is initiated, and set a breakpoint on it? That way you could check the stack trace to see where it comes from.

RE: Cannot configure Port 1 Pin 8

IstvanS — Fri, 17 Jun 2022 07:22:06 GMT

Hi,

Thanks for your reply! I'm using SDK 17.1.0. I've tried it with an other pin at port 1 and it works. This is my board definitions:

#ifndef CUSTOM_BOARD_H
#define CUSTOM_BOARD_H

#ifdef __cplusplus
extern "C" {
#endif

#include "nrf_gpio.h"

#define BUTTONS_NUMBER 2

#define BUTTON_1       NRF_GPIO_PIN_MAP(0, 3)
#define BUTTON_2       NRF_GPIO_PIN_MAP(0, 28)
#define BUTTON_PULL    NRF_GPIO_PIN_PULLUP

#define BUTTONS_ACTIVE_STATE 0

#define BUTTONS_LIST { BUTTON_1, BUTTON_2 }

#define SCL_PIN             	NRF_GPIO_PIN_MAP(0, 24)
#define SDA_PIN             	NRF_GPIO_PIN_MAP(0, 25)
#define INT_PIN				    NRF_GPIO_PIN_MAP(1, 8)

#ifdef __cplusplus
}
#endif

#endif // CUSTOM_BOARD_H

Port 1 pin 8 isn't defined anywhere else, so I don't know how it could be already in use. Is there anything else in the SDK, which has to do with pin definitions?

RE: Cannot configure Port 1 Pin 8

Einar Thorsrud — Thu, 16 Jun 2022 13:12:07 GMT

Hi,

nrf_drv_gpiote_in_init() will return NRFX_ERROR_INVALID_STATE if the pin is already used (Only one GPIOTE channel can be assigned to one physical pin), so I suspect that is what you are seeing.

Which SDK version are you using? (To double check I took the pin changed interrupt example form SDK 17.1.0 and changed the input pin to P1.08, and that worked as expected, so there does not seem to be a bug with port 1 specifically in that version, at least.)