boards: arm: add initial support for OLIMEX STM32-H405 board

The board features a STM32F405RGT6 MCU.

The code is based on boards/arm/olimex_stm32_p405 and
boards/arm/olimex_stm32_h103.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>

boards/arm/olimex_stm32_h405/Kconfig.board

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+# OLIMEX-STM32-H405 board configuration
+
+# Copyright (c) 2020, 2021 Antony Pavlov <antonynpavlov@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_OLIMEX_STM32_H405
+	bool "OLIMEX STM32-H405 Development Board"
+	depends on SOC_STM32F405XG

boards/arm/olimex_stm32_h405/Kconfig.defconfig

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+# OLIMEX-STM32-H405 board configuration
+
+# Copyright (c) 2020, Antony Pavlov <antonynpavlov@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_OLIMEX_STM32_H405
+
+config BOARD
+	default "olimex_stm32_h405"
+
+endif # BOARD_OLIMEX_STM32_H405

boards/arm/olimex_stm32_h405/board.cmake

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+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(jlink "--device=STM32F405RG" "--speed=4000")
+
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)

boards/arm/olimex_stm32_h405/doc/index.rst

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+.. _olimex_stm32_h405:
+
+OLIMEX-STM32-H405
+#################
+
+Overview
+********
+
+The OLIMEX-STM32-H405 board is based on the STMicroelectronics STM32F405RG ARM
+Cortex-M4 CPU.
+
+.. figure:: olimex_stm32_h405_top.jpg
+     :width: 540px
+     :align: center
+     :alt: OLIMEX-STM32-H405
+
+     OLIMEX-STM32-H405 top
+
+.. figure:: olimex_stm32_h405_bottom.jpg
+     :width: 540px
+     :align: center
+     :alt: OLIMEX-STM32-H405
+
+     OLIMEX-STM32-H405 bottom
+
+Hardware
+********
+
+Information about the board can be found at the
+`OLIMEX-STM32-H405 website`_ and `OLIMEX-STM32-H405 user manual`_.
+The `ST STM32F405RG Datasheet`_ contains the processor's
+information and the datasheet.
+
+Supported Features
+==================
+
+The olimex_stm32_h405 board configuration supports the following
+hardware features:
+
++-----------+------------+-------------------------+
+| Interface | Controller | Driver/Component        |
++===========+============+=========================+
+| NVIC      | on-chip    | nested vectored         |
+|           |            | interrupt controller    |
++-----------+------------+-------------------------+
+| SYSTICK   | on-chip    | system clock            |
++-----------+------------+-------------------------+
+| UART      | on-chip    | serial port             |
++-----------+------------+-------------------------+
+| GPIO      | on-chip    | gpio                    |
++-----------+------------+-------------------------+
+| USB       | on-chip    | USB device              |
++-----------+------------+-------------------------+
+| WATCHDOG  | on-chip    | independent watchdog    |
++-----------+------------+-------------------------+
+| COUNTER   | on-chip    | rtc                     |
++-----------+------------+-------------------------+
+| RNG       | on-chip    | random number generator |
++-----------+------------+-------------------------+
+
+Other hardware features have not been enabled yet for this board.
+
+
+Pin Mapping
+===========
+
+LED
+---
+
+* USER_LED (green) = PC12
+* PWR_LED (red) = power
+
+Push buttons
+------------
+
+* USER_BUTTON = PA0
+* RST = NRST
+
+External Connectors
+-------------------
+
+JTAG debug
+
++-------+--------------+-------+--------------+
+| PIN # | Signal Name  | Pin # | Signal Name  |
++=======+==============+=======+==============+
+| 1     | +3.3V        | 2     | +3.3V        |
++-------+--------------+-------+--------------+
+| 3     | PB4 / TRST   | 4     | GND          |
++-------+--------------+-------+--------------+
+| 5     | PA15 / TDI   | 6     | GND          |
++-------+--------------+-------+--------------+
+| 7     | PA13 / TMS   | 8     | GND          |
++-------+--------------+-------+--------------+
+| 9     | PA14 / TCK   | 10    | GND          |
++-------+--------------+-------+--------------+
+| 11    | GND          | 12    | GND          |
++-------+--------------+-------+--------------+
+| 13    | PB3 / TDO    | 14    | GND          |
++-------+--------------+-------+--------------+
+| 15    | GND          | 16    | GND          |
++-------+--------------+-------+--------------+
+| 17    | RST          | 18    | GND          |
++-------+--------------+-------+--------------+
+| 19    | GND          | 20    | GND          |
++-------+--------------+-------+--------------+
+
+USB Type B
+
++-------+------------------+
+| PIN # | Signal Name      |
++=======+==================+
+| 1     | +5V_USB          |
++-------+------------------+
+| 2     | PA11 / USBDM     |
++-------+------------------+
+| 3     | PA12 / USBDP     |
++-------+------------------+
+| 4     | GND              |
++-------+------------------+
+
+EXT1 header
+
++-------+------------------+-------+------------------+
+| PIN # | Signal Name      | Pin # | Signal Name      |
++=======+==================+=======+==================+
+| 1     |                  | 2     |                  |
++-------+------------------+-------+------------------+
+| ...   | ...              | ...   | ...              |
++-------+------------------+-------+------------------+
+| 9     | PC11 (USB DISC)  | 10    | PC12 (LED)       |
++-------+------------------+-------+------------------+
+| ...   | ...              | ...   | ...              |
++-------+------------------+-------+------------------+
+| 25    |                  | 26    |                  |
++-------+------------------+-------+------------------+
+
+EXT2 header
+
++-------+------------------+-------+------------------+
+| PIN # | Signal Name      | Pin # | Signal Name      |
++=======+==================+=======+==================+
+| 1     |                  | 2     |                  |
++-------+------------------+-------+------------------+
+| ...   | ...              | ...   | ...              |
++-------+------------------+-------+------------------+
+| 5     |                  | 6     | GND              |
++-------+------------------+-------+------------------+
+| 7     | PA2 / USART2_TX  | 8     |                  |
++-------+------------------+-------+------------------+
+| 9     |                  | 10    | PA3 / USART2_RX  |
++-------+------------------+-------+------------------+
+| ...   | ...              | ...   | ...              |
++-------+------------------+-------+------------------+
+| 25    |                  | 26    |                  |
++-------+------------------+-------+------------------+
+
+
+System Clock
+============
+
+OLIMEX-STM32-H405 has two external oscillators. The frequency of
+the slow clock is 32.768 kHz. The frequency of the main clock
+is 8 MHz. The processor can setup HSE to drive the master clock,
+which can be set as high as 168 MHz.
+
+Programming and Debugging
+*************************
+The OLIMEX-STM32-H405 board does not include an embedded debug tool
+interface. You will need to use ST tools or an external JTAG probe.
+In the following examples a ST-Link V2 USB dongle is used.
+
+Flashing an application to the Olimex-STM32-H405
+================================================
+
+The sample application :ref:`hello_world` is being used in this tutorial.
+
+Connect the ST-Link USB dongle to your host computer and to the JTAG port of
+the OLIMEX-STM32-H405 board.
+
+Now build and flash the application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: olimex_stm32_h405
+   :goals: build flash
+
+Run a serial host program to connect with your board:
+
+.. code-block:: console
+
+   $ minicom -D /dev/ttyACM0
+
+After resetting the board, you should see the following message:
+
+.. code-block:: console
+
+   *** Booting Zephyr OS build v2.7.99-3008-g2341052abe7c  ***
+   Hello World! olimex_stm32_h405
+
+
+Debugging
+=========
+
+You can debug an application in the usual way. Here is an example for the
+:ref:`hello_world` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: olimex_stm32_h405
+   :maybe-skip-config:
+   :goals: debug
+
+.. _OLIMEX-STM32-H405 website:
+   https://www.olimex.com/Products/ARM/ST/STM32-H405/
+
+.. _OLIMEX-STM32-H405 user manual:
+   https://www.olimex.com/Products/ARM/ST/STM32-H405/resources/STM32-H405_UM.pdf
+
+.. _ST STM32F405RG Datasheet:
+   https://www.st.com/resource/en/reference_manual/dm00031020.pdf

boards/arm/olimex_stm32_h405/olimex_stm32_h405.dts

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+/*
+ * Copyright (c) 2020-2022 Antony Pavlov <antonynpavlov@gmail.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <st/f4/stm32f405Xg.dtsi>
+#include <st/f4/stm32f405rgtx-pinctrl.dtsi>
+
+/ {
+	model = "Olimex STM32-H405 board";
+	compatible = "olimex,stm32-h405", "st,stm32f405";
+
+	chosen {
+		zephyr,console = &usart2;
+		zephyr,shell-uart = &usart2;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,ccm = &ccm0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		green_led_1: led_1 {
+			gpios = <&gpioc 12 GPIO_ACTIVE_LOW>;
+			label = "LED1";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		user_button: button {
+			label = "Key";
+			gpios = <&gpioa 0 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	aliases {
+		led0 = &green_led_1;
+		sw0 = &user_button;
+	};
+};
+
+&clk_hse {
+	clock-frequency = <DT_FREQ_M(8)>;
+	status = "okay";
+};
+
+&pll {
+	div-m = <4>;
+	mul-n = <168>;
+	div-p = <2>;
+	div-q = <7>;
+	clocks = <&clk_hse>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(168)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <4>;
+	apb2-prescaler = <2>;
+};
+
+&usart2 {
+	pinctrl-0 = <&usart2_tx_pa2 &usart2_rx_pa3>;
+	pinctrl-names = "default";
+	current-speed = <115200>;
+	status = "okay";
+};
+
+&rtc {
+	status = "okay";
+};
+
+&rng {
+	status = "okay";
+};
+
+&iwdg {
+	status = "okay";
+};
+
+zephyr_udc0: &usbotg_fs {
+	pinctrl-0 = <&usb_otg_fs_dm_pa11 &usb_otg_fs_dp_pa12>;
+	pinctrl-names = "default";
+	status = "okay";
+};

boards/arm/olimex_stm32_h405/olimex_stm32_h405.yaml

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+identifier: olimex_stm32_h405
+name: OLIMEX-STM32-H405
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+ram: 128
+flash: 1024
+supported:
+  - counter

boards/arm/olimex_stm32_h405/olimex_stm32_h405_defconfig

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+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SOC_SERIES_STM32F4X=y
+CONFIG_SOC_STM32F405XG=y
+
+# Enable MPU
+CONFIG_ARM_MPU=y
+
+# Enable HW stack protection
+CONFIG_HW_STACK_PROTECTION=y
+
+CONFIG_SERIAL=y
+
+# console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# enable GPIO
+CONFIG_GPIO=y
+
+# Enable Clocks
+CONFIG_CLOCK_CONTROL=y
+
+# enable pin controller
+CONFIG_PINCTRL=y

boards/arm/olimex_stm32_h405/support/openocd.cfg

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+source [find interface/stlink.cfg]
+
+set WORKAREASIZE 0x10000
+
+transport select hla_swd
+
+source [find target/stm32f4x.cfg]
+
+adapter_khz 1000
+adapter_nsrst_delay 100
+jtag_ntrst_delay 100
+
+reset_config srst_only srst_nogate
+
+$_TARGETNAME configure -event gdb-attach {
+	echo "Debugger attaching: halting execution"
+	reset halt
+	gdb_breakpoint_override hard
+}
+
+$_TARGETNAME configure -event gdb-detach {
+	echo "Debugger detaching: resuming execution"
+	resume
+}