boards: others: add support for the CANbardo USB to CAN adapter board

Add support for the open hardware CANbardo Universal Serial Bus (USB) to
Controller Area Network (CAN) adapter board.

Signed-off-by: Henrik Brix Andersen <henrik@brixandersen.dk>

boards/others/canbardo/Kconfig.canbardo

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+# Copyright (c) 2024-2025 Henrik Brix Andersen <henrik@brixandersen.dk>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_CANBARDO
+	select SOC_SAME70N20B

boards/others/canbardo/board.cmake

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+# Copyright (c) 2024-2025 Henrik Brix Andersen <henrik@brixandersen.dk>
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(jlink "--device=ATSAME70N20B")
+
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

boards/others/canbardo/board.yml

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+board:
+  name: canbardo
+  full_name: CANbardo
+  vendor: others
+  socs:
+    - name: same70n20b

boards/others/canbardo/canbardo-pinctrl.dtsi

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+/*
+ * Copyright (c) 2024-2025 Henrik Brix Andersen <henrik@brixandersen.dk>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <dt-bindings/pinctrl/same70n-pinctrl.h>
+
+&pinctrl {
+	uart1_default: uart1_default {
+		group1 {
+			pinmux = <PA5C_UART1_RXD>,
+				 <PA4C_UART1_TXD>;
+		};
+	};
+
+	can0_default: can0_default {
+		group1 {
+			pinmux = <PB3A_CAN0_RX>,
+				 <PB2A_CAN0_TX>;
+		};
+	};
+
+	can1_default: can1_default {
+		group1 {
+			pinmux = <PD28B_CAN1_RX>,
+				 <PD12B_CAN1_TX>;
+		};
+	};
+};

boards/others/canbardo/canbardo.dts

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+/*
+ * Copyright (c) 2024-2025 Henrik Brix Andersen <henrik@brixandersen.dk>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <freq.h>
+#include <mem.h>
+#include <atmel/same70x20b.dtsi>
+#include <zephyr/dt-bindings/gpio/gpio.h>
+#include <zephyr/dt-bindings/input/input-event-codes.h>
+
+#include "canbardo-pinctrl.dtsi"
+
+/ {
+	model = "CANbardo board";
+	compatible = "canbardo", "atmel,same70n20b", "atmel,same70b";
+
+	chosen {
+		zephyr,console = &uart1;
+		zephyr,shell-uart = &uart1;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_partition;
+		zephyr,canbus = &can0;
+	};
+
+	aliases {
+		led0 = &dfu_led;
+		sw0 = &sw;
+		mcuboot-led0 = &dfu_led;
+		mcuboot-button0 = &sw;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		dfu_led: dfu_led {
+			gpios = <&piod 9 GPIO_ACTIVE_LOW>;
+			label = "DFU LED";
+		};
+
+		can_0_ledr: can_0_ledr {
+			gpios = <&piod 25 GPIO_ACTIVE_LOW>;
+			label = "CAN0 LED ERR";
+		};
+
+		can_0_ledg: can_0_ledg {
+			gpios = <&piod 22 GPIO_ACTIVE_LOW>;
+			label = "CAN0 LED RDY";
+		};
+
+		can_0_ledy: can_0_ledy {
+			gpios = <&piod 24 GPIO_ACTIVE_LOW>;
+			label = "CAN0 LED ACT";
+		};
+
+		can_1_ledr: can_1_ledr {
+			gpios = <&piod 19 GPIO_ACTIVE_LOW>;
+			label = "CAN1 LED ERR";
+		};
+
+		can_1_ledg: can_1_ledg {
+			gpios = <&piod 17 GPIO_ACTIVE_LOW>;
+			label = "CAN1 LED RDY";
+		};
+
+		can_1_ledy: can_1_ledy {
+			gpios = <&piod 18 GPIO_ACTIVE_LOW>;
+			label = "CAN1 LED ACT";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+
+		sw: sw {
+			label = "SW";
+			gpios = <&piod 15 GPIO_ACTIVE_LOW>;
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+
+	transceiver0: can-phy0 {
+		compatible = "microchip,mcp2558fd", "can-transceiver-gpio";
+		enable-gpios = <&piod 26 GPIO_ACTIVE_LOW>;
+		max-bitrate = <8000000>;
+		#phy-cells = <0>;
+	};
+
+	transceiver1: can-phy1 {
+		compatible = "microchip,mcp2558fd", "can-transceiver-gpio";
+		enable-gpios = <&piod 20 GPIO_ACTIVE_LOW>;
+		max-bitrate = <8000000>;
+		#phy-cells = <0>;
+	};
+};
+
+&cpu0 {
+	clock-frequency = <DT_FREQ_M(300)>;
+};
+
+&uart1 {
+	status = "okay";
+	current-speed = <115200>;
+	pinctrl-0 = <&uart1_default>;
+	pinctrl-names = "default";
+};
+
+zephyr_udc0: &usbhs {
+	status = "okay";
+};
+
+&can0 {
+	status = "okay";
+	pinctrl-0 = <&can0_default>;
+	pinctrl-names = "default";
+	phys = <&transceiver0>;
+};
+
+&can1 {
+	status = "okay";
+	pinctrl-0 = <&can1_default>;
+	pinctrl-names = "default";
+	phys = <&transceiver1>;
+};
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* First half of sector 0 */
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 DT_SIZE_K(64)>;
+			read-only;
+		};
+
+		/* From sector 1 to sector 3 (included) */
+		slot0_partition: partition@20000 {
+			label = "image-0";
+			reg = <0x00020000 DT_SIZE_K(384)>;
+		};
+
+		/* From sector 4 to sector 6 (included) */
+		slot1_partition: partition@80000 {
+			label = "image-1";
+			reg = <0x00080000 DT_SIZE_K(384)>;
+		};
+
+		/* Sector 7 */
+		storage_partition: partition@e0000 {
+			label = "storage";
+			reg = <0x000e0000 DT_SIZE_K(128)>;
+		};
+	};
+};

boards/others/canbardo/canbardo.yaml

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+# Copyright (c) 2024-2025 Henrik Brix Andersen <henrik@brixandersen.dk>
+# SPDX-License-Identifier: Apache-2.0
+
+identifier: canbardo/same70n20b
+name: CANbardo
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+flash: 1024
+ram: 384
+supported:
+  - can
+  - gpio
+  - usb
+  - usb_device
+vendor: others

boards/others/canbardo/canbardo_defconfig

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+# Copyright (c) 2024-2025 Henrik Brix Andersen <henrik@brixandersen.dk>
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_ARM_MPU=y
+CONFIG_CACHE_MANAGEMENT=y
+CONFIG_HW_STACK_PROTECTION=y
+
+CONFIG_CONSOLE=y
+CONFIG_SERIAL=y
+CONFIG_UART_CONSOLE=y

boards/others/canbardo/doc/index.rst

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+.. zephyr:board:: canbardo
+
+Overview
+********
+
+CANbardo is an open hardware Universal Serial Bus (USB) to Controller Area Network (CAN) adapter
+board. It is designed to be compatible with the open source :ref:`external_module_cannectivity`.
+
+Hardware
+********
+
+The CANbardo board is equipped with an Atmel SAME70N20B microcontroller and features an USB-C
+connector (high-speed USB 2.0), two DB-9M connectors for CAN FD (up to 8 Mbit/s), a number of status
+LEDs, and a push button. Schematics and component placement drawings are available in the `CANbardo
+GitHub repository`_.
+
+Supported Features
+==================
+
+The ``canbardo`` board supports the following hardware features:
+
++-----------+------------+-------------------------------------+
+| Interface | Controller | Driver/Component                    |
++===========+============+=====================================+
+| NVIC      | on-chip    | nested vector interrupt controller  |
++-----------+------------+-------------------------------------+
+| PINMUX    | on-chip    | pinmux                              |
++-----------+------------+-------------------------------------+
+| FLASH     | on-chip    | flash memory                        |
++-----------+------------+-------------------------------------+
+| GPIO      | on-chip    | gpio                                |
++-----------+------------+-------------------------------------+
+| USB       | on-chip    | USB                                 |
++-----------+------------+-------------------------------------+
+| UART1     | on-chip    | serial console                      |
++-----------+------------+-------------------------------------+
+| CAN0      | on-chip    | CAN controller                      |
++-----------+------------+-------------------------------------+
+| CAN1      | on-chip    | CAN controller                      |
++-----------+------------+-------------------------------------+
+
+The default configuration can be found in the defconfig file:
+:zephyr_file:`boards/others/canbardo/canbardo_defconfig`.
+
+Other hardware features are not currently supported by the port.
+
+System Clock
+============
+
+The SAME70N20B is driven by a 12 MHz crystal and configured to provide a system clock of 300
+MHz. The two CAN FD controllers have a core clock frequency of 80 MHz.
+
+Programming and Debugging
+*************************
+
+Build and flash applications as usual (see :ref:`build_an_application` and
+:ref:`application_run` for more details).
+
+Here is an example for the :zephyr:code-sample:`blinky` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: canbardo
+   :Goals: flash
+
+.. _CANbardo GitHub repository:
+   https://github.com/CANbardo/canbardo