boards: makerbase: mks_canable_v20: add new board MKS CANable V2.0

A cheap and affordable stm32g4 based simple CAN and CAN-FD to usb
adapter board

Signed-off-by: Alexander Kozhinov <ak.alexander.kozhinov@gmail.com>

boards/makerbase/index.rst

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+.. _boards-makerbase:
+
+Makerbase
+#########
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   **/*

boards/makerbase/mks_canable_v20/Kconfig.mks_canable_v20

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+# Copyright (c) 2024 Alexander Kozhinov <ak.alexander.kozhinov@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_MKS_CANABLE_V20
+	select SOC_STM32G431XX

boards/makerbase/mks_canable_v20/board.cmake

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+# Copyright (c) 2024 Alexander Kozhinov <ak.alexander.kozhinov@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(openocd "--config=${BOARD_DIR}/support/openocd.cfg")
+
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/makerbase/mks_canable_v20/board.yml

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+board:
+  name: mks_canable_v20
+  full_name: MKS CANable V2.0
+  vendor: makerbase
+  socs:
+    - name: stm32g431xx

boards/makerbase/mks_canable_v20/doc/index.rst

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+.. zephyr:board:: mks_canable_v20
+
+Overview
+********
+
+The Makerbase MKS CANable V2.0 board features an ARM Cortex-M4 based STM32G431C8 MCU
+with a CAN, USB and debugger connections.
+Here are some highlights of the MKS CANable V2.0 board:
+
+- STM32 microcontroller in LQFP48 package
+- USB Type-C connector (J1)
+- CAN-Bus connector (J2)
+- ST-LINK/V3E debugger/programmer header (J4)
+- USB VBUS power supply (5 V)
+- Three LEDs: red/power_led (D1), blue/stat_led (D2), green/word_led (D3)
+- One push-button for RESET
+- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell.
+
+The LED red/power_led (D1) is connected directly to on-board 3.3 V and not controllable by the MCU.
+
+More information about the board can be found at the `MKS CANable V2.0 website`_.
+It is very advisable to take a look in on user manual `MKS CANable V2.0 User Manual`_ and
+schematic `MKS CANable V2.0 schematic`_ before start.
+
+More information about STM32G431KB can be found here:
+
+- `STM32G431C8 on www.st.com`_
+- `STM32G4 reference manual`_
+
+Supported Features
+==================
+
+The Zephyr ``mks_canable_v20`` board target supports the following hardware features:
+
++-----------+------------+-------------------------------------+
+| Interface | Controller | Driver/Component                    |
++===========+============+=====================================+
+| NVIC      | on-chip    | nested vector interrupt controller  |
++-----------+------------+-------------------------------------+
+| USB       | on-chip    | universal-serial-bus                |
++-----------+------------+-------------------------------------+
+| PINMUX    | on-chip    | pinmux                              |
++-----------+------------+-------------------------------------+
+| GPIO      | on-chip    | gpio                                |
++-----------+------------+-------------------------------------+
+| FDCAN     | on-chip    | can                                 |
++-----------+------------+-------------------------------------+
+
+Other hardware features are not yet supported on this Zephyr port.
+
+The default configuration can be found in the defconfig file:
+:zephyr_file:`boards/makerbase/mks_canable_v20/mks_canable_v20_defconfig`
+
+
+Connections and IOs
+===================
+
+Default Zephyr Peripheral Mapping:
+----------------------------------
+
+.. rst-class:: rst-columns
+
+- CAN_RX/BOOT0 : PB8
+- CAN_TX : PB9
+- D2 : PA15
+- D3 : PA0
+- USB_DN : PA11
+- USB_DP : PA12
+- SWDIO : PA13
+- SWCLK : PA14
+- NRST : PG10
+
+For more details please refer to `MKS CANable V2.0 schematic`_.
+
+System Clock
+------------
+
+The MKS CANable V2.0 system clock is driven by internal high speed oscillator.
+By default system clock is driven by PLL clock at 160 MHz,
+the PLL is driven by the 16 MHz high speed internal oscillator.
+
+The FDCAN1 peripheral is driven by PLLQ, which has 80 MHz frequency.
+
+Programming and Debugging
+*************************
+
+MKS CANable V2.0 board includes an SWDIO debug connector header J4.
+
+.. note::
+
+   The debugger is not the part of the board!
+
+Applications for the ``mks_canable_v20`` board target can be built and
+flashed in the usual way (see :ref:`build_an_application` and
+:ref:`application_run` for more details).
+
+Flashing
+========
+
+The board could be flashed using west.
+
+Flashing an application to MKS CANable V2.0
+-------------------------------------------
+
+The debugger shall be wired to MKS CANable V2.0 board's J4 connector
+according `MKS CANable V2.0 schematic`_.
+
+Build and flash an application. Here is an example for
+:zephyr:code-sample:`hello_world`.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: mks_canable_v20
+   :goals: build flash
+   :west-args: -S rtt-console
+   :compact:
+
+The argument ``-S rtt-console`` is needed for debug purposes with SEGGER RTT protocol.
+This option is optional and may be omitted. Omitting it frees up RAM space but prevents RTT usage.
+
+If option ``-S rtt-console`` is selected, the connection to the target can be established as follows:
+
+.. code-block:: console
+
+   $ telnet localhost 9090
+
+You should see the following message on the console:
+
+.. code-block:: console
+
+   $ Hello World! mks_canable_v20/stm32g431xx
+
+.. note::
+
+   Current OpenOCD config will skip Segger RTT for OpenOCD under 0.12.0.
+
+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: mks_canable_v20
+   :maybe-skip-config:
+   :goals: debug
+
+References
+**********
+
+.. target-notes::
+
+.. _MKS CANable V2.0 website:
+   https://github.com/makerbase-mks/CANable-MKS
+
+.. _MKS CANable V2.0 User Manual:
+   https://github.com/makerbase-mks/CANable-MKS/blob/main/User%20Manual/CANable%20V2.0/Makerbase%20CANable%20V2.0%20Use%20Manual.pdf
+
+.. _MKS CANable V2.0 schematic:
+   https://github.com/makerbase-mks/CANable-MKS/blob/main/Hardware/MKS%20CANable%20V2.0/MKS%20CANable%20V2.0_001%20schematic.pdf
+
+.. _STM32G431C8 on www.st.com:
+   https://www.st.com/en/microcontrollers-microprocessors/stm32g431c8.html
+
+.. _STM32G4 reference manual:
+   https://www.st.com/resource/en/reference_manual/rm0440-stm32g4-series-advanced-armbased-32bit-mcus-stmicroelectronics.pdf
+
+.. _STM32CubeProgrammer:
+   https://www.st.com/en/development-tools/stm32cubeprog.html

boards/makerbase/mks_canable_v20/mks_canable_v20.dts

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+/*
+ * Copyright (c) 2024 Alexander Kozhinov <ak.alexander.kozhinov@gmail.com>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <st/g4/stm32g431X8.dtsi>
+#include <st/g4/stm32g431c(6-8-b)tx-pinctrl.dtsi>
+
+/ {
+	model = "Makerbase MKS CANable V2.0";
+	compatible = "makerbase,mks-canable-v20";
+
+	chosen {
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,canbus = &fdcan1;
+	};
+
+	aliases {
+		led0 = &blue_led;
+		led1 = &green_led;
+	};
+
+	leds: leds {
+		compatible = "gpio-leds";
+		blue_led: led_2 {
+			gpios = <&gpioa 15 GPIO_ACTIVE_LOW>;
+			label = "blue-status D2";
+		};
+		green_led: led_3 {
+			gpios = <&gpioa 0 GPIO_ACTIVE_LOW>;
+			label = "green-word D3";
+		};
+	};
+};
+
+&clk_hsi {
+	/* Internal 16 MHz clock used to drive PLL */
+	status = "okay";
+};
+
+&clk_hsi48 {
+	/* Internal 48 MHz clock used to drive USB */
+	status = "okay";
+};
+
+/* Adjust the pll for a SYSTEM Clock of 160 MHz  */
+&pll {
+	div-m = <4>;
+	mul-n = <80>;
+	div-p = <7>;
+	div-q = <2>;
+	div-r = <4>;
+	clocks = <&clk_hsi>;
+	status = "okay";
+};
+
+&rcc {
+	clocks = <&pll>;
+	clock-frequency = <DT_FREQ_M(160)>;
+	ahb-prescaler = <1>;
+	apb1-prescaler = <1>;
+	apb2-prescaler = <1>;
+};
+
+stm32_lp_tick_source: &lptim1 {
+	clocks = <&rcc STM32_CLOCK_BUS_APB1 0x80000000>,
+		 <&rcc STM32_SRC_LSE LPTIM1_SEL(3)>;
+	status = "okay";
+};
+
+zephyr_udc0: &usb {
+	pinctrl-0 = <&usb_dm_pa11 &usb_dp_pa12>;
+	pinctrl-names = "default";
+	clocks = <&rcc STM32_CLOCK(APB1, 23U)>,
+		 <&rcc STM32_SRC_HSI48 CLK48_SEL(0)>;
+	status = "okay";
+};
+
+&fdcan1 {
+	pinctrl-0 = <&fdcan1_rx_pb8 &fdcan1_tx_pb9>;
+	pinctrl-names = "default";
+	clocks = <&rcc STM32_CLOCK_BUS_APB1 0x00001000>,
+		 <&rcc STM32_SRC_PLL_Q FDCAN_SEL(1)>;
+	status = "okay";
+};

boards/makerbase/mks_canable_v20/mks_canable_v20.yaml

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+identifier: mks_canable_v20
+name: MKS CANable V2.0
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+ram: 32
+flash: 64
+supported:
+  - can
+  - counter
+  - gpio
+  - usb_device
+  - usbd
+vendor: makerbase

boards/makerbase/mks_canable_v20/mks_canable_v20_defconfig

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+# Copyright (c) 2024 Alexander Kozhinov <ak.alexander.kozhinov@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_GPIO=y
+CONFIG_ARM_MPU=y

boards/makerbase/mks_canable_v20/support/openocd.cfg

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+# Copyright (c) 2024 Alexander Kozhinov <ak.alexander.kozhinov@gmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+source [find interface/stlink.cfg]
+source [find target/stm32g4x.cfg]