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boards: Add Adafruit Metro RP2040
Product photo from https://learn.adafruit.com/assets/123296 with the license CC BY-SA 3.0 Tested with the samples mentioned in the index.rst page. Signed-off-by: Jonas Berg <[email protected]>
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‎boards/adafruit/metro_rp2040/Kconfig‎

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# Copyright (c) 2025 Jonas Berg
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# SPDX-License-Identifier: Apache-2.0
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config BOARD_ADAFRUIT_METRO_RP2040
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select RP2_FLASH_W25Q080

‎boards/adafruit/metro_rp2040/Kconfig.adafruit_metro_rp2040‎

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# Copyright (c) 2025 Jonas Berg
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# SPDX-License-Identifier: Apache-2.0
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config BOARD_ADAFRUIT_METRO_RP2040
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select SOC_RP2040

‎boards/adafruit/metro_rp2040/Kconfig.defconfig‎

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# Copyright (c) 2022 Peter Johanson
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# SPDX-License-Identifier: Apache-2.0
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if BOARD_ADAFRUIT_METRO_RP2040
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if I2C_DW
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config I2C_DW_CLOCK_SPEED
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default 125
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endif # I2C_DW
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config USB_SELF_POWERED
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default n
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endif # BOARD_ADAFRUIT_METRO_RP2040

‎boards/adafruit/metro_rp2040/adafruit_metro_rp2040-pinctrl.dtsi‎

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/*
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* Copyright (c) 2025 Jonas Berg
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <dt-bindings/pinctrl/rpi-pico-rp2040-pinctrl.h>
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&pinctrl {
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uart0_default: uart0_default {
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group1 {
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pinmux = <UART0_TX_P0>;
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};
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group2 {
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pinmux = <UART0_RX_P1>;
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input-enable;
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};
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};
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i2c0_default: i2c0_default {
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group1 {
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pinmux = <I2C0_SDA_P16>;
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input-enable;
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};
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group2 {
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pinmux = <I2C0_SCL_P17>;
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input-enable;
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};
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};
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spi0_default: spi0_default {
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group1 {
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/* Pin GPIO23 is used as CS (no pinmux available) */
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pinmux = <SPI0_TX_P19>, <SPI0_SCK_P18>;
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};
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group2 {
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pinmux = <SPI0_RX_P20>;
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input-enable;
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};
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};
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adc_default: adc_default {
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group1 {
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pinmux = <ADC_CH0_P26>, <ADC_CH1_P27>, <ADC_CH2_P28>, <ADC_CH3_P29>;
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input-enable;
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};
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};
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ws2812_pio0_default: ws2812_pio0_default {
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ws2812 {
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pinmux = <PIO0_P14>;
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};
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};
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};

‎boards/adafruit/metro_rp2040/adafruit_metro_rp2040.dts‎

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/*
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* Copyright (c) 2021 Yonatan Schachter
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* Copyright (c) 2022 Peter Johanson
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* Copyright (c) 2025 Jonas Berg
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/dts-v1/;
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#include <raspberrypi/rpi_pico/rp2040.dtsi>
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#include <dt-bindings/pinctrl/rpi-pico-rp2040-pinctrl.h>
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#include <zephyr/dt-bindings/input/input-event-codes.h>
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#include <zephyr/dt-bindings/led/led.h>
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#include "adafruit_metro_rp2040-pinctrl.dtsi"
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#include "arduino_r3_connector.dtsi"
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/ {
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model = "Adafruit Metro RP2040";
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compatible = "adafruit,metro_rp2040";
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chosen {
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zephyr,sram = &sram0;
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zephyr,flash = &flash0;
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zephyr,flash-controller = &ssi;
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zephyr,console = &uart0;
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zephyr,shell-uart = &uart0;
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zephyr,code-partition = &code_partition;
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};
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aliases {
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watchdog0 = &wdt0;
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led-strip = &ws2812;
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led0 = &red_led;
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sdhc0 = &sdhc0;
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};
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zephyr,user {
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io-channels = <&adc 0>, <&adc 1>, <&adc 2>, <&adc 3>;
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};
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leds: leds {
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compatible = "gpio-leds";
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red_led: red_led {
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gpios = <&gpio0 13 GPIO_ACTIVE_HIGH>;
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label = "Red LED";
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};
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};
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stemma_connector: stemma_connector {
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compatible = "stemma-qt-connector";
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#gpio-cells = <2>;
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gpio-map-mask = <0xffffffff 0xffffffc0>;
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gpio-map-pass-thru = <0 0x3f>;
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gpio-map = <0 0 &gpio0 17 0>, /* SCL */
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<1 0 &gpio0 16 0>; /* SDA */
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};
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};
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&flash0 {
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reg = <0x10000000 DT_SIZE_M(16)>;
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partitions {
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compatible = "fixed-partitions";
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#address-cells = <1>;
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#size-cells = <1>;
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/* Reserved memory for the second stage bootloader */
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second_stage_bootloader: partition@0 {
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label = "second_stage_bootloader";
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reg = <0x00000000 0x100>;
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read-only;
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};
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/*
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* Usable flash. Starts at 0x100, after the bootloader. The partition
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* size is 16 MB minus the 0x100 bytes taken by the bootloader.
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*/
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code_partition: partition@100 {
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label = "code-partition";
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reg = <0x100 (DT_SIZE_M(16) - 0x100)>;
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read-only;
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};
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};
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};
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&gpio0 {
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status = "okay";
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};
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&uart0 {
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current-speed = <115200>;
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status = "okay";
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pinctrl-0 = <&uart0_default>;
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pinctrl-names = "default";
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};
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zephyr_i2c: &i2c0 {
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status = "okay";
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pinctrl-0 = <&i2c0_default>;
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pinctrl-names = "default";
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clock-frequency = <I2C_BITRATE_FAST>;
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};
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&spi0 {
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pinctrl-0 = <&spi0_default>;
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pinctrl-names = "default";
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status = "okay";
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cs-gpios = <&gpio0 23 GPIO_ACTIVE_LOW>;
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sdhc0: sdhc@0 {
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compatible = "zephyr,sdhc-spi-slot";
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reg = <0>;
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status = "okay";
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spi-max-frequency = <12000000>;
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mmc {
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compatible = "zephyr,sdmmc-disk";
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disk-name = "SD";
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status = "okay";
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};
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};
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};
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&adc {
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status = "okay";
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pinctrl-0 = <&adc_default>;
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pinctrl-names = "default";
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#address-cells = <1>;
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#size-cells = <0>;
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channel@0 {
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reg = <0>;
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zephyr,gain = "ADC_GAIN_1";
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zephyr,reference = "ADC_REF_INTERNAL";
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zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
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zephyr,resolution = <12>;
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};
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channel@1 {
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reg = <1>;
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zephyr,gain = "ADC_GAIN_1";
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zephyr,reference = "ADC_REF_INTERNAL";
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zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
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zephyr,resolution = <12>;
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};
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channel@2 {
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reg = <2>;
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zephyr,gain = "ADC_GAIN_1";
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zephyr,reference = "ADC_REF_INTERNAL";
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zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
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zephyr,resolution = <12>;
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};
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channel@3 {
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reg = <3>;
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zephyr,gain = "ADC_GAIN_1";
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zephyr,reference = "ADC_REF_INTERNAL";
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zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
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zephyr,resolution = <12>;
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};
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};
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&timer {
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status = "okay";
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};
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&wdt0 {
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status = "okay";
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};
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&pio0 {
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status = "okay";
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pio-ws2812 {
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compatible = "worldsemi,ws2812-rpi_pico-pio";
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status = "okay";
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pinctrl-0 = <&ws2812_pio0_default>;
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pinctrl-names = "default";
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bit-waveform = <3>, <3>, <4>;
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ws2812: ws2812 {
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status = "okay";
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gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
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chain-length = <1>;
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color-mapping = <LED_COLOR_ID_GREEN
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LED_COLOR_ID_RED
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LED_COLOR_ID_BLUE>;
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reset-delay = <280>;
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frequency = <800000>;
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};
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};
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};
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zephyr_udc0: &usbd {
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status = "okay";
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};
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&die_temp {
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status = "okay";
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};
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&vreg {
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regulator-always-on;
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regulator-allowed-modes = <REGULATOR_RPI_PICO_MODE_NORMAL>;
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};
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&xosc {
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startup-delay-multiplier = <64>;
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};

‎boards/adafruit/metro_rp2040/adafruit_metro_rp2040.yaml‎

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identifier: adafruit_metro_rp2040
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name: Adafruit Metro RP2040
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type: mcu
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arch: arm
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flash: 16384
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ram: 264
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toolchain:
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- zephyr
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- gnuarmemb
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supported:
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- adc
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- clock
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- counter
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- dma
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- flash
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- gpio
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- hwinfo
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- i2c
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- pwm
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- spi
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- uart
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- watchdog

‎boards/adafruit/metro_rp2040/adafruit_metro_rp2040_defconfig‎

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# Copyright (c) 2025 Jonas Berg
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# SPDX-License-Identifier: Apache-2.0
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CONFIG_BUILD_OUTPUT_HEX=y
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CONFIG_BUILD_OUTPUT_UF2=y
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CONFIG_CLOCK_CONTROL=y
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CONFIG_CONSOLE=y
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CONFIG_GPIO=y
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CONFIG_PIO_RPI_PICO=y
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CONFIG_RESET=y
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CONFIG_SERIAL=y
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CONFIG_UART_CONSOLE=y
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CONFIG_UART_INTERRUPT_DRIVEN=y
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CONFIG_USE_DT_CODE_PARTITION=y

‎boards/adafruit/metro_rp2040/arduino_r3_connector.dtsi‎

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/*
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* Copyright (c) 2025 Jonas Berg
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/ {
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arduino_header: connector {
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compatible = "arduino-header-r3";
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#gpio-cells = <2>;
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gpio-map-mask = <0xffffffff 0xffffffc0>;
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gpio-map-pass-thru = <0 0x3f>;
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gpio-map = <0 0 &gpio0 26 0>, /* A0 */
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<1 0 &gpio0 27 0>, /* A1 */
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<2 0 &gpio0 28 0>, /* A2 */
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<3 0 &gpio0 29 0>, /* A3 */
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<4 0 &gpio0 24 0>, /* D24 */
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<5 0 &gpio0 25 0>, /* D25 */
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<6 0 &gpio0 1 0>, /* RX */
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<7 0 &gpio0 0 0>, /* TX */
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<8 0 &gpio0 2 0>, /* D2 */
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<9 0 &gpio0 3 0>, /* D3 */
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<10 0 &gpio0 4 0>, /* D4 */
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<11 0 &gpio0 5 0>, /* D5 */
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<12 0 &gpio0 6 0>, /* D6 */
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<13 0 &gpio0 7 0>, /* D7 */
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<14 0 &gpio0 8 0>, /* D8 */
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<15 0 &gpio0 9 0>, /* D9 */
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<16 0 &gpio0 10 0>, /* D10 */
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<17 0 &gpio0 11 0>, /* D11 */
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<18 0 &gpio0 12 0>, /* D12 */
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<19 0 &gpio0 13 0>, /* D13 */
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<20 0 &gpio0 16 0>, /* SDA */
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<21 0 &gpio0 17 0>; /* SCL */
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};
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};
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arduino_i2c: &i2c0 {};
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arduino_serial: &uart0 {};
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/* No SPI in the Arduino connector by default for this board */

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