boards: st: nucleo_f072rb: add support for Nucleo-F072RB board

Add support for the STMicroelectronics Nucleo-F072RB board.

Signed-off-by: Alex Fabre <alex.fabre@rtone.fr>

boards/st/nucleo_f072rb/Kconfig.defconfig

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+# NUCLEO_F072RB board configuration
+
+# Copyright (c) 2025 Alex Fabre
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_NUCLEO_F072RB
+
+config SPI_STM32_INTERRUPT
+	default y
+	depends on SPI
+
+endif # BOARD_NUCLEO_F072RB

boards/st/nucleo_f072rb/Kconfig.nucleo_f072rb

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+# Copyright (c) 2025 Alex Fabre
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_NUCLEO_F072RB
+	select SOC_STM32F072XB

boards/st/nucleo_f072rb/arduino_r3_connector.dtsi

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+/*
+ * Copyright (c) 2025 Alex Fabre
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	arduino_header: connector {
+		compatible = "arduino-header-r3";
+		#gpio-cells = <2>;
+		gpio-map-mask = <0xffffffff 0xffffffc0>;
+		gpio-map-pass-thru = <0 0x3f>;
+		gpio-map = <0 0 &gpioa 0 0>,	/* A0 */
+			   <1 0 &gpioa 1 0>,	/* A1 */
+			   <2 0 &gpioa 4 0>,	/* A2 */
+			   <3 0 &gpiob 0 0>,	/* A3 */
+			   <4 0 &gpioc 1 0>,	/* A4 */
+			   <5 0 &gpioc 0 0>,	/* A5 */
+			   <6 0 &gpioa 3 0>,	/* D0 */
+			   <7 0 &gpioa 2 0>,	/* D1 */
+			   <8 0 &gpioa 10 0>,	/* D2 */
+			   <9 0 &gpiob 3 0>,	/* D3 */
+			   <10 0 &gpiob 5 0>,	/* D4 */
+			   <11 0 &gpiob 4 0>,	/* D5 */
+			   <12 0 &gpiob 10 0>,	/* D6 */
+			   <13 0 &gpioa 8 0>,	/* D7 */
+			   <14 0 &gpioa 9 0>,	/* D8 */
+			   <15 0 &gpioc 7 0>,	/* D9 */
+			   <16 0 &gpiob 6 0>,	/* D10 */
+			   <17 0 &gpioa 7 0>,	/* D11 */
+			   <18 0 &gpioa 6 0>,	/* D12 */
+			   <19 0 &gpioa 5 0>,	/* D13 */
+			   <20 0 &gpiob 9 0>,	/* D14 */
+			   <21 0 &gpiob 8 0>;	/* D15 */
+	};
+};
+
+arduino_i2c: &i2c1 {};
+arduino_spi: &spi1 {};

boards/st/nucleo_f072rb/board.cmake

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: Apache-2.0
+
+# keep first
+board_runner_args(stm32cubeprogrammer "--port=swd" "--reset-mode=hw")
+board_runner_args(jlink "--device=STM32F072RB" "--speed=4000")
+
+# keep first
+include(${ZEPHYR_BASE}/boards/common/stm32cubeprogrammer.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

boards/st/nucleo_f072rb/board.yml

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+board:
+  name: nucleo_f072rb
+  full_name: Nucleo F072RB
+  vendor: st
+  socs:
+    - name: stm32f072xb

boards/st/nucleo_f072rb/doc/index.rst

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+.. zephyr:board:: nucleo_f072rb
+
+Overview
+********
+The STM32 Nucleo-64 development board with STM32F072RB MCU, supports Arduino and ST morpho connectivity.
+
+The STM32 Nucleo board provides an affordable, and flexible way for users to try out new concepts,
+and build prototypes with the STM32 microcontroller, choosing from the various
+combinations of performance, power consumption, and features.
+
+The Arduino* Uno V3 connectivity support and the ST morpho headers allow easy functionality
+expansion of the STM32 Nucleo open development platform with a wide choice of
+specialized shields.
+
+The STM32 Nucleo board integrates the ST-LINK/V2-1 debugger and programmer.
+
+The STM32 Nucleo board comes with the STM32 comprehensive software HAL library together
+with various packaged software examples.
+
+More information about the board can be found at the `Nucleo F072RB website`_.
+
+Hardware
+********
+Nucleo F072RB provides the following hardware components:
+
+- STM32 microcontroller in QFP64 package
+- Two types of extension resources:
+
+  - Arduino* Uno V3 connectivity
+  - ST morpho extension pin headers for full access to all STM32 I/Os
+
+- On-board ST-LINK/V2-1 debugger/programmer with SWD connector:
+
+  - Selection-mode switch to use the kit as a standalone ST-LINK/V2-1
+
+- Flexible board power supply:
+
+  - USB VBUS or external source (3.3V, 5V, 7 - 12V)
+  - Power management access point
+
+- Three LEDs:
+
+  - USB communication (LD1), user LED (LD2), power LED (LD3)
+
+- Two push-buttons: USER and RESET
+- USB re-enumeration capability. Three different interfaces supported on USB:
+
+  - Virtual COM port
+  - Mass storage
+  - Debug port
+
+More information about STM32F072RB can be found in
+the `STM32F072 reference manual`_ .
+
+
+Supported Features
+==================
+
+The Zephyr ``nucleo_f072rb`` board supports the following hardware features:
+
++-----------+------------+-------------------------------------+
+| Interface | Controller | Driver/Component                    |
++===========+============+=====================================+
+| NVIC      | on-chip    | nested vector interrupt controller  |
++-----------+------------+-------------------------------------+
+| UART      | on-chip    | serial port-polling;                |
+|           |            | serial port-interrupt               |
++-----------+------------+-------------------------------------+
+| PINMUX    | on-chip    | pinmux                              |
++-----------+------------+-------------------------------------+
+| GPIO      | on-chip    | gpio                                |
++-----------+------------+-------------------------------------+
+| CLOCK     | on-chip    | reset and clock control             |
++-----------+------------+-------------------------------------+
+| FLASH     | on-chip    | flash memory                        |
++-----------+------------+-------------------------------------+
+| WATCHDOG  | on-chip    | independent watchdog                |
++-----------+------------+-------------------------------------+
+| I2C       | on-chip    | i2c controller                      |
++-----------+------------+-------------------------------------+
+| SPI       | on-chip    | SPI controller                      |
++-----------+------------+-------------------------------------+
+| RTC       | on-chip    | rtc                                 |
++-----------+------------+-------------------------------------+
+
+Other hardware features are not yet supported in this Zephyr port.
+
+The default configuration can be found in
+:zephyr_file:`boards/st/nucleo_f072rb/nucleo_f072rb_defconfig`
+
+Connections and IOs
+===================
+
+Each of the GPIO pins can be configured by software as output (push-pull or open-drain), as
+input (with or without pull-up or pull-down), or as peripheral alternate function. Most of the
+GPIO pins are shared with digital or analog alternate functions. All GPIOs are high current
+capable except for analog inputs.
+
+Board connectors:
+-----------------
+.. image:: img/nucleo_f072rb_connectors.webp
+   :align: center
+   :alt: Nucleo F072RB connectors
+
+Default Zephyr Peripheral Mapping:
+----------------------------------
+
+- UART_1 TX/RX : PA9/PA10
+- UART_2 TX/RX : PA2/PA3 (ST-Link Virtual COM Port)
+- I2C1 SCL/SDA : PB8/PB9 (Arduino I2C)
+- I2C2 SCL/SDA : PB10/PB11
+- SPI1 NSS/SCK/MISO/MOSI : PB6/PA5/PA6/PA7 (Arduino SPI)
+- SPI2 SCK/MISO/MOSI : PB13/PB14/PB15
+- USER_PB : PC13
+- LD1 : PA5
+
+For more details please refer to `STM32 Nucleo-64 board User Manual`_.
+
+Programming and Debugging
+*************************
+
+Nucleo F072RB board includes an ST-LINK/V2-1 embedded debug tool interface.
+
+Applications for the ``nucleo_f072rb`` board configuration can be built and
+flashed in the usual way (see :ref:`build_an_application` and
+:ref:`application_run` for more details).
+
+Flashing
+========
+
+The board is configured to be flashed using west `STM32CubeProgrammer`_ runner,
+so its :ref:`installation <stm32cubeprog-flash-host-tools>` is required.
+
+Alternatively, OpenOCD or JLink can also be used to flash the board using
+the ``--runner`` (or ``-r``) option:
+
+.. code-block:: console
+
+   $ west flash --runner openocd
+   $ west flash --runner jlink
+
+Flashing an application to Nucleo F072RB
+----------------------------------------
+
+Here is an example for the :zephyr:code-sample:`blinky` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/basic/blinky
+   :board: nucleo_f072rb
+   :goals: build flash
+
+You will see the LED blinking every second.
+
+Debugging
+=========
+
+You can debug an application in the usual way.  Here is an example for the
+:zephyr:code-sample:`hello_world` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: nucleo_f072rb
+   :maybe-skip-config:
+   :goals: debug
+
+References
+**********
+
+.. target-notes::
+
+.. _Nucleo F072RB website:
+   https://www.st.com/en/evaluation-tools/nucleo-f072rb.html
+
+.. _STM32F072 reference manual:
+   https://www.st.com/resource/en/reference_manual/dm00031936.pdf
+
+.. _STM32 Nucleo-64 board User Manual:
+   https://www.st.com/resource/en/user_manual/dm00105823.pdf
+
+.. _STM32CubeProgrammer:
+   https://www.st.com/en/development-tools/stm32cubeprog.html

boards/st/nucleo_f072rb/nucleo_f072rb.dts

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+/*
+ * Copyright (c) 2025 Alex Fabre
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <st/f0/stm32f072Xb.dtsi>
+#include <st/f0/stm32f072r(8-b)tx-pinctrl.dtsi>
+#include "arduino_r3_connector.dtsi"
+#include "st_morpho_connector.dtsi"
+#include <zephyr/dt-bindings/input/input-event-codes.h>
+
+/ {
+	model = "STMicroelectronics NUCLEO-F072RB board";
+	compatible = "st,stm32f072rb-nucleo";
+
+	chosen {
+		zephyr,console = &usart2;
+		zephyr,shell-uart = &usart2;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+	};
+
+	leds: leds {
+		compatible = "gpio-leds";
+		green_led_2: led_2 {
+			gpios = <&gpioa 5 GPIO_ACTIVE_HIGH>;
+			label = "User LD2";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		user_button: button {
+			label = "User";
+			gpios = <&gpioc 13 GPIO_ACTIVE_LOW>;
+			zephyr,code = <INPUT_KEY_0>;
+		};
+	};
+
+	aliases {
+		led0 = &green_led_2;
+		sw0 = &user_button;
+		watchdog0 = &iwdg;
+		die-temp0 = &die_temp;
+		volt-sensor0 = &vref;
+	};
+};
+
+&clk_lse {
+	status = "okay";
+};
+
+&clk_hse {
+	hse-bypass;
+	clock-frequency = <DT_FREQ_M(8)>; /* STLink 8MHz clock */
+	status = "okay";
+};
+
+&pll {
+	clocks = <&clk_hse>;
+	prediv = <1>;
+	mul = <6>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(48)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <2>;
+};
+
+&usart1 {
+	pinctrl-0 = <&usart1_tx_pa9 &usart1_rx_pa10>;
+	pinctrl-names = "default";
+	current-speed = <115200>;
+	status = "okay";
+};
+
+&usart2 {
+	pinctrl-0 = <&usart2_tx_pa2 &usart2_rx_pa3>;
+	pinctrl-names = "default";
+	current-speed = <115200>;
+	status = "okay";
+};
+
+&i2c1 {
+	pinctrl-0 = <&i2c1_scl_pb8 &i2c1_sda_pb9>;
+	pinctrl-names = "default";
+	status = "okay";
+	clock-frequency = <I2C_BITRATE_FAST>;
+};
+
+&i2c2 {
+	pinctrl-0 = <&i2c2_scl_pb10 &i2c2_sda_pb11>;
+	pinctrl-names = "default";
+	status = "okay";
+	clock-frequency = <I2C_BITRATE_FAST>;
+};
+
+&spi1 {
+	pinctrl-0 = <&spi1_sck_pa5 &spi1_miso_pa6 &spi1_mosi_pa7>;
+	pinctrl-names = "default";
+	cs-gpios = <&gpiob 6 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+	status = "okay";
+};
+
+&spi2 {
+	pinctrl-0 = <&spi2_sck_pb13 &spi2_miso_pb14 &spi2_mosi_pb15>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&iwdg {
+	status = "okay";
+};
+
+&adc1 {
+	pinctrl-0 = <&adc_in0_pa0>;
+	pinctrl-names = "default";
+	st,adc-clock-source = "SYNC";
+	st,adc-prescaler = <4>;
+	status = "okay";
+};
+
+&rtc {
+	clocks = <&rcc STM32_CLOCK_BUS_APB1 0x10000000>,
+		 <&rcc STM32_SRC_LSE RTC_SEL(1)>;
+	status = "okay";
+};
+
+&die_temp {
+	status = "okay";
+};
+
+&vref {
+	status = "okay";
+};

boards/st/nucleo_f072rb/nucleo_f072rb.yaml

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+identifier: nucleo_f070rb
+name: ST Nucleo F072RB
+type: mcu
+arch: arm
+ram: 16
+flash: 128
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+supported:
+  - adc
+  - arduino_gpio
+  - arduino_i2c
+  - arduino_spi
+  - gpio
+  - i2c
+  - spi
+  - watchdog
+  - rtc
+testing:
+  ignore_tags:
+    - net
+    - bluetooth
+vendor: st

boards/st/nucleo_f072rb/nucleo_f072rb_defconfig

@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: Apache-2.0
+
+# Serial Drivers
+CONFIG_SERIAL=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+
+# Enable console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# GPIO Controller
+CONFIG_GPIO=y

boards/st/nucleo_f072rb/st_morpho_connector.dtsi

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2024 Alex Fabre
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/gpio/gpio.h>
+#include <zephyr/dt-bindings/gpio/st-morpho-header.h>
+
+/ {
+	st_morpho_header: st-morpho-header {
+		compatible = "st-morpho-header";
+		#gpio-cells = <2>;
+		gpio-map-mask = <ST_MORPHO_PIN_MASK 0x0>;
+		gpio-map-pass-thru = <0x0 GPIO_DT_FLAGS_MASK>;
+		gpio-map = <ST_MORPHO_L_1 0 &gpioc 10 0>,
+			   <ST_MORPHO_L_2 0 &gpioc 11 0>,
+			   <ST_MORPHO_L_3 0 &gpioc 12 0>,
+			   <ST_MORPHO_L_4 0 &gpiod 2 0>,
+			   <ST_MORPHO_L_9 0 &gpiof 6 0>,
+			   <ST_MORPHO_L_11 0 &gpiof 7 0>,
+			   <ST_MORPHO_L_13 0 &gpioa 13 0>,
+			   <ST_MORPHO_L_15 0 &gpioa 14 0>,
+			   <ST_MORPHO_L_17 0 &gpioa 15 0>,
+			   <ST_MORPHO_L_21 0 &gpiob 7 0>,
+			   <ST_MORPHO_L_23 0 &gpioc 13 0>,
+			   <ST_MORPHO_L_25 0 &gpioc 14 0>, /* SB49=ON */
+			   <ST_MORPHO_L_27 0 &gpioc 15 0>, /* SB48=ON */
+			   <ST_MORPHO_L_28 0 &gpioa 0 0>,
+			   <ST_MORPHO_L_29 0 &gpiof 0 0>, /* SB55=ON */
+			   <ST_MORPHO_L_30 0 &gpioa 1 0>,
+			   <ST_MORPHO_L_31 0 &gpiof 1 0>, /* SB54=ON */
+			   <ST_MORPHO_L_32 0 &gpioa 4 0>,
+			   <ST_MORPHO_L_34 0 &gpiob 0 0>,
+			   <ST_MORPHO_L_35 0 &gpioc 2 0>,
+			   <ST_MORPHO_L_36 0 &gpioc 1 0>, /* SB56=ON, SB46=OFF */
+			   <ST_MORPHO_L_37 0 &gpioc 3 0>,
+			   <ST_MORPHO_L_38 0 &gpioc 0 0>, /* SB51=ON, SB52=OFF */
+			   <ST_MORPHO_R_1 0 &gpioc 9 0>,
+			   <ST_MORPHO_R_2 0 &gpioc 8 0>,
+			   <ST_MORPHO_R_3 0 &gpiob 8 0>,
+			   <ST_MORPHO_R_4 0 &gpioc 6 0>,
+			   <ST_MORPHO_R_5 0 &gpiob 9 0>,
+			   <ST_MORPHO_R_6 0 &gpioc 5 0>,
+			   <ST_MORPHO_R_10 0 &gpiod 8 0>,
+			   <ST_MORPHO_R_11 0 &gpioa 5 0>, /* SB42=ON, SB29=OFF */
+			   <ST_MORPHO_R_12 0 &gpioa 12 0>,
+			   <ST_MORPHO_R_13 0 &gpioa 6 0>, /* SB41=ON, SB24=OFF */
+			   <ST_MORPHO_R_14 0 &gpioa 11 0>,
+			   <ST_MORPHO_R_15 0 &gpioa 7 0>, /* SB40=ON, SB20=OFF */
+			   <ST_MORPHO_R_16 0 &gpiob 12 0>,
+			   <ST_MORPHO_R_17 0 &gpiob 6 0>,
+			   <ST_MORPHO_R_18 0 &gpiob 11 0>,
+			   <ST_MORPHO_R_19 0 &gpioc 7 0>,
+			   <ST_MORPHO_R_21 0 &gpioa 9 0>,
+			   <ST_MORPHO_R_22 0 &gpiob 2 0>,
+			   <ST_MORPHO_R_23 0 &gpioa 8 0>,
+			   <ST_MORPHO_R_24 0 &gpiob 1 0>,
+			   <ST_MORPHO_R_25 0 &gpiob 10 0>,
+			   <ST_MORPHO_R_26 0 &gpiob 15 0>, /* SB25=ON, SB36=OFF */
+			   <ST_MORPHO_R_27 0 &gpiob 4 0>,
+			   <ST_MORPHO_R_28 0 &gpiob 14 0>, /* SB28=ON, SB39=OFF */
+			   <ST_MORPHO_R_29 0 &gpiob 5 0>,
+			   <ST_MORPHO_R_30 0 &gpiob 13 0>, /* SB35=ON, SB44=OFF */
+			   <ST_MORPHO_R_31 0 &gpiob 3 0>,
+			   <ST_MORPHO_R_33 0 &gpioa 10 0>,
+			   <ST_MORPHO_R_34 0 &gpioc 4 0>,
+			   <ST_MORPHO_R_35 0 &gpioa 2 0>,
+			   <ST_MORPHO_R_36 0 &gpiof 5 0>,
+			   <ST_MORPHO_R_37 0 &gpioa 3 0>,
+			   <ST_MORPHO_R_38 0 &gpiof 4 0>;
+	};
+};

boards/st/nucleo_f072rb/support/openocd.cfg

@@ -0,0 +1,12 @@
+source [find board/st_nucleo_f0.cfg]
+
+$_TARGETNAME configure -event gdb-attach {
+	echo "Debugger attaching: halting execution"
+	reset halt
+	gdb_breakpoint_override hard
+}
+
+$_TARGETNAME configure -event gdb-detach {
+	echo "Debugger detaching: resuming execution"
+	resume
+}