QDEC device tree issue

[StefanoN]

Hello,

I'm trying to run the QDEC example I find in the nRF Connect SDK.

I'm having issues in setting up the device tree:

/dts-v1/;
#include <nordic/nrf52833_qiaa.dtsi>

/ {
model = "Nordic nRF52833 Dongle NRF52833";
compatible = "nordic,nrf52833-dongle-nrf52833";

chosen {
zephyr,console = &uart0;
zephyr,shell-uart = &uart0;
zephyr,uart-mcumgr = &uart0;
zephyr,sram = &sram0;
zephyr,flash = &flash0;
nordic,nrf-qdec = &qdec0;
};

aliases {
qdec0 = &qdec;
};

nrf-qdec@0 {
compatible = "nordic,nrf-qdec";
reg = <0x0 1>;
interrupts = <18 NRF_DEFAULT_IRQ_PRIORITY>;
pinctrl-0 = <&qdec0_default>;
led-pre = <0>;
steps = <24>;
interrupt-parent = <&nvic>;
};
};

&pinctrl {
qdec0_default: qdec0_default{
group1{
psels = <NRF_PSEL(QDEC_A, 0, 30)>,
<NRF_PSEL(QDEC_B, 0, 29)>;
};
};
};

The problem is that qdec0 is not found from the C code, even though it is present as an alias in the device tree file:

What is wrong with my device tree?

Thanks

[Sigurd]

Hi!

Make sure you have:

&qdec {
status = "okay";

e.g. as shown here:

https://github.com/nrfconnect/sdk-nrf/blob/v2.5.2/boards/arm/nrf52810dmouse_nrf52810/nrf52810dmouse_nrf52810.dts#L44

[StefanoN]

That fixed the issue!

However now I get another error related to pin controls:

/dts-v1/;
#include <nordic/nrf52833_qiaa.dtsi>

/ {
	model = "Nordic nRF52833 Dongle NRF52833";
	compatible = "nordic,nrf52833-dongle-nrf52833";

	chosen {
		zephyr,console = &uart0;
		zephyr,shell-uart = &uart0;
		zephyr,uart-mcumgr = &uart0;
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
		nordic,nrf-qdec = &qdec0;
	};

	aliases {
		qdec0 = &qdec;
	};
};

&qdec {
	status = "okay";
	led-pre = <0>;
	steps = <24>;
	pinctrl-0 = <&qdec_default>;
};

&pinctrl {
	qdec_default: qdec_default {
		group1 {
			psels = <NRF_PSEL(QDEC_A, 0, 30)>,
					<NRF_PSEL(QDEC_B, 0, 29)>;
		};
	};
};

There is no syntax error in the .dts file, what is the issue?

[Sigurd]

Try setting this in prj.conf

CONFIG_QDEC_NRFX=y

[StefanoN]

I cannot add it as it needs dependencies that cannot be added:

CONFIG_SENSOR=y
CONFIG_PRINTK=y

CONFIG_QDEC_NRFX=y # Missing dependencies: DT_HAS_NORDIC_NRF_QDEC_ENABLED && HAS_HW_NRF_QDEC0
CONFIG_DT_HAS_NORDIC_NRF_QDEC_ENABLED=y # Symbol CONFIG_DT_HAS_NORDIC_NRF_QDEC_ENABLED cannot be set (has no prompt)
CONFIG_HAS_HW_NRF_QDEC0=y # CONFIG_HAS_HW_NRF_QDEC0 cannot be set (has no prompt)

I put the errors as comments

[Sigurd]

Try adding this in the overlay:

&qdec {
	status = "okay";
	led-pre = <0>;
    enable-pin = <4>;
	steps = <24>;
	pinctrl-0 = <&qdec_default>;
    pinctrl-1 = <&qdec_sleep>;
	pinctrl-names = "default", "sleep";
};

&pinctrl {
	qdec_default: qdec_default {
		group1 {
			psels = <NRF_PSEL(QDEC_A, 0, 30)>,
					<NRF_PSEL(QDEC_B, 0, 29)>;
		};
	};

    qdec_sleep: qdec_sleep {
		group1 {
			psels = <NRF_PSEL(QDEC_A, 0, 30)>,
					<NRF_PSEL(QDEC_B, 0, 29)>;
		};
	};
};

[StefanoN]

Now I get:

vers__sensor__qdec_nrfx.a(qdec_nrfx.c.obj): in function `pinctrl_apply_state':
C:/ncs/v2.4.2/zephyr/include/zephyr/drivers/pinctrl.h:348: undefined reference to `pinctrl_lookup_state'
c:/ncs/toolchains/31f4403e35/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe: zephyr/drivers/sensor/qdec_nrfx/libdrivers__sensor__qdec_nrfx.a(qdec_nrfx.c.obj): in function `pinctrl_apply_state_direct':
C:/ncs/v2.4.2/zephyr/include/zephyr/drivers/pinctrl.h:329: undefined reference to `pinctrl_configure_pins'
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
FATAL ERROR: command exited with status 1: 'C:\ncs\toolchains\31f4403e35\opt\bin\cmake.EXE' --build 'c:\F_drive\Ste\DEV\optical_mouse\FW\working_examples\qdec_1\build'

[StefanoN]

Fixed.

The last error message I posted was a clear indication that some source code was missing, in this case related to pin controls.

Indeed I had to put `CONFIG_PINCTRL=y` into `proj.conf`.