Adding a 3x3 Shield button board to nRF5340 DK

[TrulliDev]

I have acquired a basic 3x3 matrix scanning type button board that drops onto the Shield interface of the nRF5340.  I am running the "peripheral_hids_keyboard" sample project with Zephyr.  The button board is the "Ibridge lite 3×3 keypad shield" from https://www.electrokit.com/en/product/ibridge-lite-3x3-keypad-shield-with-lcd-interface/.

What would be the recommend way to add a scanning keyboard driver to this sample project?  I am just getting familiar with this environment and would like to avoid wasting time by re-inventing the wheel if i can avoid it.

I did enable the CONFIG_KSCAN option in the .config file but I don't know how to go any further at this moment.

Thanks!

[Einarh]

Hello

The kscan driver in Zephyr does seem like a good place to start.

You can find info on the driver here:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/hardware/peripherals/kscan.html

And there is also a sample available:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/drivers/kscan/README.html

Let me know if you have trouble getting it up and running!

-Einar

[TrulliDev]

Einar,

I have tried to run the KSCAN sample project and am getting a build error.  I do not know how to declare/define the actual keyboard so I think the build error is related to that issue.  Attached is a screenshot of my error.

Thanks,
Peter

[TrulliDev]

I will also tack on that it appears that I'm missing the definition for "kscan0".

[Einarh]

DT_ALIAS is looking for kscan0 in the devicetree, which I would assume it won't find if you haven't added it since the documentation says "key values are defined by a keymap provided by the keyboard manufacturer".

During the build process a devicetree file is generated in build/zephyr/zephyr.dts, you could check if there's anything there related to kscan or if you'll have to add everything yourself. In the latter case I would recommend checking out the Devicetree documentation.

-Einar

[TrulliDev]

I attached my zephyr.dts and yes kscan0 is not declared in it.  I am somewhat lost because I assumed an example project would target real hardware and I could then have an example that I could modify instead of having to invent a new driver.

main.c seems to reference a "Fujitsu keyboard model N860-7401-TOO1" cap sense touch screen so I would assume there would be a device free for that but somehow it is vaporized by Nordic's plugins creating a build configuration that targets the nRF5340 DK?

Part of my trouble is that I haven't been given much time from management to learn this platform so I'm seeking a little bit of hand-holding to get something working quickly.

My problem is even more complex in that this is a Shield device that is using a bunch of GPIO pins so common sense tells me I need to do some mapping of those GPIO pins to the "keyboard" device.

Fullscreen zephyr.dts.txt Download

/dts-v1/;

/ {
	#address-cells = < 0x1 >;
	#size-cells = < 0x1 >;
	model = "Nordic nRF5340 Audio DK NRF5340 Application";
	compatible = "nordic,nrf5340-audio-dk-nrf5340-cpuapp";
	chosen {
		zephyr,entropy = &cryptocell_sw;
		zephyr,flash-controller = &flash_controller;
		zephyr,console = &uart0;
		zephyr,shell-uart = &uart0;
		zephyr,uart-mcumgr = &uart0;
		zephyr,bt-mon-uart = &uart0;
		zephyr,bt-c2h-uart = &uart0;
		zephyr,ipc_shm = &sram0_shared;
		zephyr,sram = &sram0_ns;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_ns_partition;
	};
	aliases {
		led0 = &rgb1_red;
		led1 = &rgb1_green;
		led2 = &rgb1_blue;
		led3 = &rgb2_red;
		led4 = &rgb2_green;
		led5 = &rgb2_blue;
		led6 = &led1_blue;
		led7 = &led2_green;
		led8 = &led3_green;
		sw0 = &button_1_vol_dn;
		sw1 = &button_2_vol_up;
		sw2 = &button3;
		sw3 = &button4;
		sw4 = &button5;
	};
	soc {
		#address-cells = < 0x1 >;
		#size-cells = < 0x1 >;
		compatible = "nordic,nRF5340-CPUAPP-QKAA", "nordic,nRF5340-CPUAPP", "nordic,nRF53", "simple-bus";
		interrupt-parent = < &nvic >;
		ranges;
		nvic: interrupt-controller@e000e100 {
			#address-cells = < 0x1 >;
			compatible = "arm,v8m-nvic";
			reg = < 0xe000e100 0xc00 >;
			interrupt-controller;
			#interrupt-cells = < 0x2 >;
			arm,num-irq-priority-bits = < 0x3 >;
			phandle = < 0x1 >;
		};
		systick: timer@e000e010 {
			compatible = "arm,armv8m-systick";
			reg = < 0xe000e010 0x10 >;
			status = "disabled";
		};
		sram0: memory@20000000 {
			compatible = "mmio-sram";
			reg = < 0x20000000 0x80000 >;
		};
		peripheral@40000000 {
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			ranges = < 0x0 0x40000000 0x10000000 >;
			dcnf: dcnf@0 {
				compatible = "nordic,nrf-dcnf";
				reg = < 0x0 0x1000 >;
				status = "okay";
			};
			oscillators: oscillator@4000 {
				compatible = "nordic,nrf-oscillators";
				reg = < 0x4000 0x1000 >;
				status = "okay";
			};
			regulators: regulator@4000 {
				compatible = "nordic,nrf-regulators";
				reg = < 0x4000 0x1000 >;
				status = "okay";
			};
			clock: clock@5000 {
				compatible = "nordic,nrf-clock";
				reg = < 0x5000 0x1000 >;
				interrupts = < 0x5 0x1 >;
				status = "okay";
				label = "CLOCK";
			};
			power: power@5000 {
				compatible = "nordic,nrf-power";
				reg = < 0x5000 0x1000 >;
				interrupts = < 0x5 0x1 >;
				status = "okay";
			};
			reset: reset-controller@5000 {
				compatible = "nordic,nrf-reset";
				reg = < 0x5000 0x1000 >;
				status = "okay";
			};
			ctrlap: ctrlap@6000 {
				compatible = "nordic,nrf-ctrlapperi";
				reg = < 0x6000 0x1000 >;
				status = "okay";
			};
			i2c0: i2c@8000 {
				compatible = "nordic,nrf-twim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x8000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0x8 0x1 >;
				status = "disabled";
				label = "I2C_0";
			};
			spi0: spi@8000 {
				compatible = "nordic,nrf-spim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x8000 0x1000 >;
				interrupts = < 0x8 0x1 >;
				status = "disabled";
				label = "SPI_0";
			};
			uart0: uart@8000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0x8000 0x1000 >;
				interrupts = < 0x8 0x1 >;
				status = "okay";
				label = "UART_0";
				current-speed = < 0x1c200 >;
				pinctrl-0 = < &uart0_default >;
				pinctrl-1 = < &uart0_sleep >;
				pinctrl-names = "default", "sleep";
			};
			i2c1: i2c@9000 {
				compatible = "nordic,nrf-twim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x9000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0x9 0x1 >;
				status = "okay";
				label = "I2C_1";
				pinctrl-0 = < &i2c1_default >;
				pinctrl-1 = < &i2c1_sleep >;
				pinctrl-names = "default", "sleep";
			};
			spi1: spi@9000 {
				compatible = "nordic,nrf-spim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x9000 0x1000 >;
				interrupts = < 0x9 0x1 >;
				status = "disabled";
				label = "SPI_1";
			};
			uart1: uart@9000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0x9000 0x1000 >;
				interrupts = < 0x9 0x1 >;
				status = "disabled";
				label = "UART_1";
			};
			spi4: spi@a000 {
				compatible = "nordic,nrf-spim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xa000 0x1000 >;
				interrupts = < 0xa 0x1 >;
				status = "okay";
				label = "SPI_4";
				cs-gpios = < &gpio0 0xb 0x1 >, < &gpio0 0x11 0x1 >;
				pinctrl-0 = < &spi4_default >;
				pinctrl-1 = < &spi4_sleep >;
				pinctrl-names = "default", "sleep";
				sdhc0: sdhc@0 {
					compatible = "zephyr,mmc-spi-slot";
					reg = < 0x0 >;
					status = "okay";
					label = "SDHC0";
					spi-max-frequency = < 0x7a1200 >;
				};
				cs47l63: cs47l63@1 {
					reg = < 0x1 >;
					label = "CS47L63";
				};
			};
			i2c2: i2c@b000 {
				compatible = "nordic,nrf-twim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xb000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0xb 0x1 >;
				status = "disabled";
				label = "I2C_2";
			};
			spi2: spi@b000 {
				compatible = "nordic,nrf-spim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xb000 0x1000 >;
				interrupts = < 0xb 0x1 >;
				status = "disabled";
				label = "SPI_2";
			};
			uart2: uart@b000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0xb000 0x1000 >;
				interrupts = < 0xb 0x1 >;
				status = "disabled";
				label = "UART_2";
			};
			i2c3: i2c@c000 {
				compatible = "nordic,nrf-twim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xc000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0xc 0x1 >;
				status = "disabled";
				label = "I2C_3";
			};
			spi3: spi@c000 {
				compatible = "nordic,nrf-spim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xc000 0x1000 >;
				interrupts = < 0xc 0x1 >;
				status = "disabled";
				label = "SPI_3";
			};
			uart3: uart@c000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0xc000 0x1000 >;
				interrupts = < 0xc 0x1 >;
				status = "disabled";
				label = "UART_3";
			};
			adc: adc@e000 {
				compatible = "nordic,nrf-saadc";
				reg = < 0xe000 0x1000 >;
				interrupts = < 0xe 0x1 >;
				status = "okay";
				label = "ADC_0";
				#io-channel-cells = < 0x1 >;
			};
			timer0: timer@f000 {
				compatible = "nordic,nrf-timer";
				status = "okay";
				reg = < 0xf000 0x1000 >;
				cc-num = < 0x6 >;
				interrupts = < 0xf 0x1 >;
				prescaler = < 0x0 >;
				label = "TIMER_0";
			};
			timer1: timer@10000 {
				compatible = "nordic,nrf-timer";
				status = "okay";
				reg = < 0x10000 0x1000 >;
				cc-num = < 0x6 >;
				interrupts = < 0x10 0x1 >;
				prescaler = < 0x0 >;
				label = "TIMER_1";
			};
			timer2: timer@11000 {
				compatible = "nordic,nrf-timer";
				status = "okay";
				reg = < 0x11000 0x1000 >;
				cc-num = < 0x6 >;
				interrupts = < 0x11 0x1 >;
				prescaler = < 0x0 >;
				label = "TIMER_2";
			};
			rtc0: rtc@14000 {
				compatible = "nordic,nrf-rtc";
				reg = < 0x14000 0x1000 >;
				cc-num = < 0x4 >;
				interrupts = < 0x14 0x1 >;
				status = "okay";
				clock-frequency = < 0x8000 >;
				prescaler = < 0x1 >;
				label = "RTC_0";
			};
			rtc1: rtc@15000 {
				compatible = "nordic,nrf-rtc";
				reg = < 0x15000 0x1000 >;
				cc-num = < 0x4 >;
				interrupts = < 0x15 0x1 >;
				status = "okay";
				clock-frequency = < 0x8000 >;
				prescaler = < 0x1 >;
				label = "RTC_1";
			};
			dppic: dppic@17000 {
				compatible = "nordic,nrf-dppic";
				reg = < 0x17000 0x1000 >;
				status = "okay";
				label = "DPPIC";
			};
			wdt: wdt0: watchdog@18000 {
				compatible = "nordic,nrf-wdt";
				reg = < 0x18000 0x1000 >;
				interrupts = < 0x18 0x1 >;
				status = "okay";
				label = "WDT";
			};
			wdt1: watchdog@19000 {
				compatible = "nordic,nrf-wdt";
				reg = < 0x19000 0x1000 >;
				interrupts = < 0x19 0x1 >;
				status = "disabled";
				label = "WDT_1";
			};
			comp: comparator@1a000 {
				compatible = "nordic,nrf-comp";
				reg = < 0x1a000 0x1000 >;
				interrupts = < 0x1a 0x1 >;
				status = "disabled";
				#io-channel-cells = < 0x1 >;
			};
			egu0: egu@1b000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1b000 0x1000 >;
				interrupts = < 0x1b 0x1 >;
				status = "okay";
			};
			egu1: egu@1c000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1c000 0x1000 >;
				interrupts = < 0x1c 0x1 >;
				status = "okay";
			};
			egu2: egu@1d000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1d000 0x1000 >;
				interrupts = < 0x1d 0x1 >;
				status = "okay";
			};
			egu3: egu@1e000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1e000 0x1000 >;
				interrupts = < 0x1e 0x1 >;
				status = "okay";
			};
			egu4: egu@1f000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1f000 0x1000 >;
				interrupts = < 0x1f 0x1 >;
				status = "okay";
			};
			egu5: egu@20000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x20000 0x1000 >;
				interrupts = < 0x20 0x1 >;
				status = "okay";
			};
			pwm0: pwm@21000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x21000 0x1000 >;
				interrupts = < 0x21 0x1 >;
				status = "okay";
				label = "PWM_0";
				#pwm-cells = < 0x3 >;
			};
			pwm1: pwm@22000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x22000 0x1000 >;
				interrupts = < 0x22 0x1 >;
				status = "disabled";
				label = "PWM_1";
				#pwm-cells = < 0x3 >;
			};
			pwm2: pwm@23000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x23000 0x1000 >;
				interrupts = < 0x23 0x1 >;
				status = "disabled";
				label = "PWM_2";
				#pwm-cells = < 0x3 >;
			};
			pwm3: pwm@24000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x24000 0x1000 >;
				interrupts = < 0x24 0x1 >;
				status = "disabled";
				label = "PWM_3";
				#pwm-cells = < 0x3 >;
			};
			pdm0: pdm@26000 {
				compatible = "nordic,nrf-pdm";
				reg = < 0x26000 0x1000 >;
				interrupts = < 0x26 0x1 >;
				status = "disabled";
				label = "PDM_0";
			};
			i2s0: i2s@28000 {
				compatible = "nordic,nrf-i2s";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x28000 0x1000 >;
				interrupts = < 0x28 0x1 >;
				status = "okay";
				label = "I2S_0";
				pinctrl-0 = < &i2s0_default >;
				pinctrl-names = "default";
			};
			mbox: ipc: mbox@2a000 {
				compatible = "nordic,mbox-nrf-ipc", "nordic,nrf-ipc";
				reg = < 0x2a000 0x1000 >;
				tx-mask = < 0xffff >;
				rx-mask = < 0xffff >;
				interrupts = < 0x2a 0x1 >;
				#mbox-cells = < 0x1 >;
				status = "okay";
				phandle = < 0xb >;
			};
			qspi: qspi@2b000 {
				compatible = "nordic,nrf-qspi";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x2b000 0x1000 >, < 0x10000000 0x10000000 >;
				reg-names = "qspi", "qspi_mm";
				interrupts = < 0x2b 0x1 >;
				status = "disabled";
				label = "QSPI";
			};
			nfct: nfct@2d000 {
				compatible = "nordic,nrf-nfct";
				reg = < 0x2d000 0x1000 >;
				interrupts = < 0x2d 0x1 >;
				status = "disabled";
			};
			mutex: mutex@30000 {
				compatible = "nordic,nrf-mutex";
				reg = < 0x30000 0x1000 >;
				status = "okay";
			};
			qdec0: qdec@33000 {
				compatible = "nordic,nrf-qdec";
				reg = < 0x33000 0x1000 >;
				interrupts = < 0x33 0x1 >;
				status = "disabled";
				label = "QDEC_0";
			};
			qdec1: qdec@34000 {
				compatible = "nordic,nrf-qdec";
				reg = < 0x34000 0x1000 >;
				interrupts = < 0x34 0x1 >;
				status = "disabled";
				label = "QDEC_1";
			};
			usbd: zephyr_udc0: usbd@36000 {
				compatible = "nordic,nrf-usbd";
				reg = < 0x36000 0x1000 >;
				interrupts = < 0x36 0x1 >;
				num-bidir-endpoints = < 0x1 >;
				num-in-endpoints = < 0x7 >;
				num-out-endpoints = < 0x7 >;
				num-isoin-endpoints = < 0x1 >;
				num-isoout-endpoints = < 0x1 >;
				status = "okay";
				label = "USBD";
				hs_0 {
					label = "HEADSET";
					compatible = "usb-audio-hs";
					mic-feature-mute;
					mic-channel-l;
					mic-channel-r;
					hp-feature-mute;
					hp-channel-l;
					hp-channel-r;
				};
			};
			usbreg: regulator@37000 {
				compatible = "nordic,nrf-usbreg";
				reg = < 0x37000 0x1000 >;
				interrupts = < 0x37 0x1 >;
				status = "okay";
			};
			flash_controller: flash-controller@39000 {
				compatible = "nordic,nrf53-flash-controller";
				reg = < 0x39000 0x1000 >;
				partial-erase;
				#address-cells = < 0x1 >;
				#size-cells = < 0x1 >;
				label = "NRF_FLASH_DRV_NAME";
				flash0: flash@0 {
					compatible = "soc-nv-flash";
					label = "NRF_FLASH";
					erase-block-size = < 0x1000 >;
					write-block-size = < 0x4 >;
					reg = < 0x0 0x100000 >;
					partitions {
						compatible = "fixed-partitions";
						#address-cells = < 0x1 >;
						#size-cells = < 0x1 >;
						boot_partition: partition@0 {
							label = "mcuboot";
							reg = < 0x0 0x10000 >;
						};
						slot0_partition: partition@10000 {
							label = "image-0";
							reg = < 0x10000 0x40000 >;
						};
						slot0_ns_partition: partition@50000 {
							label = "image-0-nonsecure";
							reg = < 0x50000 0x30000 >;
						};
						slot1_partition: partition@80000 {
							label = "image-1";
							reg = < 0x80000 0x40000 >;
						};
						slot1_ns_partition: partition@c0000 {
							label = "image-1-nonsecure";
							reg = < 0xc0000 0x30000 >;
						};
						scratch_partition: partition@f0000 {
							label = "image-scratch";
							reg = < 0xf0000 0xa000 >;
						};
						storage_partition: partition@fa000 {
							label = "storage";
							reg = < 0xfa000 0x6000 >;
						};
					};
				};
			};
			kmu: kmu@39000 {
				compatible = "nordic,nrf-kmu";
				reg = < 0x39000 0x1000 >;
				interrupts = < 0x39 0x1 >;
				status = "okay";
			};
			vmc: vmc@81000 {
				compatible = "nordic,nrf-vmc";
				reg = < 0x81000 0x1000 >;
				status = "okay";
			};
			gpio0: gpio@842500 {
				compatible = "nordic,nrf-gpio";
				gpio-controller;
				reg = < 0x842500 0x300 >;
				#gpio-cells = < 0x2 >;
				label = "GPIO_0";
				status = "okay";
				port = < 0x0 >;
				phandle = < 0x6 >;
			};
			gpio1: gpio@842800 {
				compatible = "nordic,nrf-gpio";
				gpio-controller;
				reg = < 0x842800 0x300 >;
				#gpio-cells = < 0x2 >;
				ngpios = < 0x10 >;
				label = "GPIO_1";
				status = "okay";
				port = < 0x1 >;
				phandle = < 0xc >;
			};
		};
		gpiote1: gpiote: gpiote@4002f000 {
			compatible = "nordic,nrf-gpiote";
			reg = < 0x4002f000 0x1000 >;
			interrupts = < 0x2f 0x5 >;
			status = "okay";
			label = "GPIOTE_1";
		};
	};
	pinctrl: pin-controller {
		compatible = "nordic,nrf-pinctrl";
		i2s0_default: i2s0_default {
			phandle = < 0x9 >;
			group1 {
				psels = < 0x13000c >;
				nordic,drive-mode = < 0x3 >;
			};
			group2 {
				psels = < 0xd000e >, < 0xf0010 >, < 0x12000d >, < 0x11000f >;
			};
		};
		i2s0_sleep: i2s0_sleep {
			group1 {
				psels = < 0x13000c >, < 0xd000e >, < 0xf0010 >, < 0x12000d >, < 0x11000f >;
				low-power-enable;
			};
		};
		uart0_default: uart0_default {
			phandle = < 0x2 >;
			group1 {
				psels = < 0x25 >, < 0x20027 >;
			};
			group2 {
				psels = < 0x10024 >, < 0x30026 >;
				bias-pull-up;
			};
		};
		uart0_sleep: uart0_sleep {
			phandle = < 0x3 >;
			group1 {
				psels = < 0x25 >, < 0x10024 >, < 0x20027 >, < 0x30026 >;
				low-power-enable;
			};
		};
		i2c1_default: i2c1_default {
			phandle = < 0x4 >;
			group1 {
				psels = < 0xc0022 >, < 0xb0023 >;
			};
		};
		i2c1_sleep: i2c1_sleep {
			phandle = < 0x5 >;
			group1 {
				psels = < 0xc0022 >, < 0xb0023 >;
				low-power-enable;
			};
		};
		spi4_default: spi4_default {
			phandle = < 0x7 >;
			group1 {
				psels = < 0x40008 >, < 0x50009 >;
				nordic,drive-mode = < 0x3 >;
			};
			group2 {
				psels = < 0x6000a >;
			};
		};
		spi4_sleep: spi4_sleep {
			phandle = < 0x8 >;
			group1 {
				psels = < 0x40008 >, < 0x6000a >, < 0x50009 >;
				low-power-enable;
			};
		};
	};
	rng_hci: entropy_bt_hci {
		compatible = "zephyr,bt-hci-entropy";
		label = "bt_hci_entropy";
		status = "okay";
	};
	cpus {
		#address-cells = < 0x1 >;
		#size-cells = < 0x0 >;
		cpu@0 {
			device_type = "cpu";
			compatible = "arm,cortex-m33f";
			reg = < 0x0 >;
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			mpu: mpu@e000ed90 {
				compatible = "arm,armv8m-mpu";
				reg = < 0xe000ed90 0x40 >;
				arm,num-mpu-regions = < 0x8 >;
			};
		};
	};
	cryptocell_sw: cryptocell-sw {
		compatible = "nordic,nrf-cc312-sw";
		#address-cells = < 0x0 >;
		label = "CRYPTOCELL_SW";
		status = "okay";
	};
	ipc {
		ipc0: ipc0 {
			compatible = "zephyr,ipc-openamp-static-vrings";
			memory-region = < &sram0_shared >;
			mboxes = < &mbox 0x0 >, < &mbox 0x1 >;
			mbox-names = "tx", "rx";
			role = "host";
			status = "okay";
		};
	};
	gpio_fwd: nrf-gpio-forwarder {
		compatible = "nordic,nrf-gpio-forwarder";
		status = "okay";
		uart {
			gpios = < &gpio1 0x9 0x0 >, < &gpio1 0x8 0x0 >, < &gpio1 0xb 0x0 >, < &gpio1 0xa 0x0 >;
		};
	};
	reserved-memory {
		#address-cells = < 0x1 >;
		#size-cells = < 0x1 >;
		ranges;
		sram0_image: image@20000000 {
			reg = < 0x20000000 0x70000 >;
		};
		sram0_s: image_s@20000000 {
			reg = < 0x20000000 0x40000 >;
		};
		sram0_ns: image_ns@20040000 {
			reg = < 0x20040000 0x30000 >;
		};
		sram0_shared: memory@20070000 {
			reg = < 0x20070000 0x10000 >;
			phandle = < 0xa >;
		};
	};
	leds: leds {
		compatible = "gpio-leds";
		rgb1_red: led_0 {
			gpios = < &gpio0 0x7 0x0 >;
			label = "0 LED_RGB_RED CORE_APP";
		};
		rgb1_green: led_1 {
			gpios = < &gpio0 0x19 0x0 >;
			label = "0 LED_RGB_GREEN CORE_APP";
		};
		rgb1_blue: led_2 {
			gpios = < &gpio0 0x1a 0x0 >;
			label = "0 LED_RGB_BLUE CORE_APP";
		};
		rgb2_red: led_3 {
			gpios = < &gpio0 0x1c 0x0 >;
			label = "1 LED_RGB_RED CORE_NET";
		};
		rgb2_green: led_4 {
			gpios = < &gpio0 0x1d 0x0 >;
			label = "1 LED_RGB_GREEN CORE_NET";
		};
		rgb2_blue: led_5 {
			gpios = < &gpio0 0x1e 0x0 >;
			label = "1 LED_RGB_BLUE CORE_NET";
		};
		led1_blue: led_6 {
			gpios = < &gpio0 0x1f 0x0 >;
			label = "2 LED_MONO_BLUE CORE_APP";
		};
		led2_green: led_7 {
			gpios = < &gpio1 0x0 0x0 >;
			label = "3 LED_MONO_GREEN CORE_APP";
		};
		led3_green: led_8 {
			gpios = < &gpio1 0x1 0x0 >;
			label = "4 LED_MONO_GREEN CORE_APP";
		};
	};
	buttons {
		compatible = "gpio-keys";
		button_1_vol_dn: button_1_vol_dn {
			gpios = < &gpio0 0x2 0x11 >;
			label = "Push button 1";
		};
		button_2_vol_up: button_2_vol_up {
			gpios = < &gpio0 0x3 0x11 >;
			label = "Push button 2";
		};
		button3: button_3 {
			gpios = < &gpio0 0x4 0x11 >;
			label = "Push button 3";
		};
		button4: button_4 {
			gpios = < &gpio0 0x6 0x11 >;
			label = "Push button 4";
		};
		button5: button_5 {
			gpios = < &gpio0 0x5 0x11 >;
			label = "Push button 5";
		};
	};
	nrf5340_audio_dk {
		compatible = "gpio-keys";
		hw_codec_gpio_in: hw_codec_gpio_in {
			gpios = < &gpio0 0x14 0x1 >;
			label = "GPIO from HW codec";
		};
		hw_codec_irq_in: hw_codec_irq_in {
			gpios = < &gpio0 0x13 0x1 >;
			label = "Interrupt from HW codec";
		};
		hw_codec_reset_out: hw_codec_reset_out {
			gpios = < &gpio0 0x12 0x1 >;
			label = "Reset HW codec";
		};
		hw_codec_sel_out: hw_codec_sel_out {
			gpios = < &gpio0 0x15 0x1 >;
			label = "HW codec selector. Low selects OB HW codec, high \t\t\t\t selects external HW codec";
		};
		spi_sel_in: spi_sel_in {
			gpios = < &gpio0 0x16 0x1 >;
			label = "SPI select in. High = nRF SPI to HW codec. \t\t\t\t Low = FTDI to HW codec";
		};
		pmic_iset_out: pmic_iset_out {
			gpios = < &gpio0 0x17 0x0 >;
			label = "PMIC ISET";
		};
		board_id_en_out: board_id_en_out {
			gpios = < &gpio0 0x18 0x0 >;
			label = "Board revision readback enable";
		};
		board_id_in: board_id_in {
			gpios = < &gpio0 0x1b 0x0 >;
			label = "Board revision analog readback";
		};
		curr_mon_alert_in: curr_mon_alert_in {
			gpios = < &gpio1 0xf 0x1 >;
			label = "Curr mon alert in from INA231";
		};
	};
};