Cannot build LVGL sample for nRF7002DK

[MarioDLH]

Hi.

I'm trying to build the LVGL sample from Zephyr for nRF7002DK (target nrf7002dk_nrf5340_cpuapp) using version 2.5.0 of nRF Connect SDK, but it shows the same error inconsistently (there have been some times I have managed to build succesfully, but now I can't reproduce it). Also I've set the shield adafruit_2_8_tft_touch_v2 in CMakeLists.txt. The times it has actually built without issues it has also failed again as soon as I have added some configurations to prj.conf but reverting the file to the original configurations does not make it work again, keeping the same error while building even selecting pristine build or just deleting the build folder. This is the output:

In file included from C:/ncs/v2.5.0/zephyr/include/zephyr/sys/util_macro.h:34,
                 from C:/ncs/v2.5.0/zephyr/include/zephyr/sys/util.h:17,
                 from C:/ncs/v2.5.0/zephyr/include/zephyr/devicetree.h:25,
                 from C:/ncs/v2.5.0/zephyr/include/zephyr/device.h:12,
                 from C:/ncs/v2.5.0/zephyr/drivers/input/input_gpio_keys.c:9:
C:/ncs/v2.5.0/zephyr/include/zephyr/toolchain/gcc.h:81:36: error: static assertion failed: "zephyr-code must be specified to use the input-gpio-keys driver"
   81 | #define BUILD_ASSERT(EXPR, MSG...) _Static_assert(EXPR, "" MSG)

Considering this behaviour it seems it's a problem with the SDK, either when building succesfully or not, but I can't find a solution.

Thanks.

[Håkon Alseth]

Hi,

 

it looks like there is no input keys setup for the display.

To get it to compile, try to set CONFIG_INPUT_GPIO_KEYS=n.

 

Kind regards,

Håkon

[MarioDLH]

Hi.

It seems it works correctly now. Also I didn't specify that it worked without issues for nRF5340DK with the default options, hence my confusion. Thanks.

Best regards.

[Håkon Alseth]

Hi,

 

I see what you mean.

The difference is that each button* is setup with zephyr,code = <INPUT_KEY_*> in nrf5340dk, while it is not in the 7002dk board.

You can fix this by adding this overlay:

#include <zephyr/dt-bindings/input/input-event-codes.h>

/ {
	buttons {
		compatible = "gpio-keys";
		button0: button_0 {
			gpios = <&gpio1 8 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
			label = "Push button 1";
			zephyr,code = <INPUT_KEY_0>;
		};
		button1: button_1 {
			gpios = <&gpio1 9 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
			label = "Push button 2";
			zephyr,code = <INPUT_KEY_1>;
		};
	};
};

 

Kind regards,

Håkon

[MarioDLH]

Hi.

Thanks for the clarification. It builds and works properly with the default settings and the overlay.

Best regards.

[Håkon Alseth]

Glad to hear it worked out. Hope you have a wonderful day!

 

Kind regards,

Håkon