boards: arm: stm32: basic support for STM32F769I-DISCO board

This patch adds basic support and for the STM32F769I-DISCO board
with GPIO, USART support. Two USARTs are enabled.The GPIOs are
configured for the 4 LEDs and one button on the board.

Signed-off-by: Yong Jin <jinyong.iot@foxmail.com>

boards/arm/stm32f769i_disco/CMakeLists.txt

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+zephyr_library()
+zephyr_library_sources(pinmux.c)
+zephyr_library_include_directories(${PROJECT_SOURCE_DIR}/drivers)

boards/arm/stm32f769i_disco/Kconfig.board

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+# Kconfig - STM32F769I Discovery board configuration
+#
+# Copyright (c) 2018 Yong Jin
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+config BOARD_STM32F769I_DISCO
+	bool "STM32F769I Discovery Development Board"
+	depends on SOC_STM32F769XI

boards/arm/stm32f769i_disco/Kconfig.defconfig

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+# Kconfig - STM32F769I DISCOVERY board configuration
+#
+# Copyright (c) 2018 Yong Jin
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+if BOARD_STM32F769I_DISCO
+
+config BOARD
+	default "stm32f769i_disco"
+
+if UART_CONSOLE
+
+config UART_STM32_PORT_1
+	default y
+
+endif # UART_CONSOLE
+
+endif # BOARD_STM32F769I_DISCO

boards/arm/stm32f769i_disco/board.cmake

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+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/arm/stm32f769i_disco/board.h

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+/*
+ * Copyright (c) 2018  Yong Jin
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef __INC_BOARD_H
+#define __INC_BOARD_H
+
+
+#include <soc.h>
+
+#endif /* __INC_BOARD_H */

boards/arm/stm32f769i_disco/doc/stm32f769i_disco.rst

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+.. _stm32f769i_disco_board:
+
+ST STM32F769I Discovery
+#######################
+
+Overview
+********
+
+The discovery kit enables a wide diversity of applications taking benefit
+from audio, multi-sensor support, graphics, security, security, video,
+and high-speed connectivity features. Important board features include:
+
+- STM32F769NIH6 microcontroller featuring 2 Mbytes of Flash memory and 512 Kbytes of RAM, in BGA216 package
+- On-board ST-LINK/V2-1 supporting USB reenumeration capability
+- USB ST-LINK functions: virtual COM port, mass storage, debug port
+- Five power supply options:
+
+  - ST LINK/V2-1
+  - USB HS connector
+  - 5 V from RJ45 (Power Over Ethernet)
+  - 5 V from Arduino™ or external connector
+  - USB charger
+
+- 4-inch capacitive touch LCD display with MIPI-DSI connector
+- SAI audio codec
+- Two audio line jacks, one for input and one for output
+- Stereo speaker outputs
+- Four ST MEMS microphones on DFSDM inputs
+- Two SPDIF RCA input and output connectors
+- Two push-buttons (user and reset)
+- 512-Mbit Quad-SPI Flash memory
+- 128-Mbit SDRAM
+- Connector for microSD card
+- Wi-Fi or Ext-EEP daughterboard connector
+- USB OTG HS with Micro-AB connector
+- Ethernet connector compliant with IEEE-802.3-2002
+- Power Over Ethernet based on IEEE 802.3af (Powered Device, 48 V to 5 V, 3 W)
+- Power supply output for external applications: 3.3 V or 5 V
+- Arduino Uno V3 connectors
+- Comprehensive free software including a variety of examples, part of the STM32Cube package
+- Supported by a wide choice of integrated development environments
+
+.. image:: img/en.stm32f769i-disco.jpg
+     :width: 500px
+     :align: center
+     :height: 260px
+     :alt: STM32F769I-DISCO
+
+More information about the board can be found at the `32F769I-DISCO website`_.
+
+Hardware
+********
+
+The STM32F769I Discovery kit provides the following hardware components:
+
+- STM32F769NIH6 in BGA216 package
+- ARM |reg| 32-bit Cortex |reg| -M7 CPU with FPU
+- 216 MHz max CPU frequency
+- VDD from 1.7 V to 3.6 V
+- 2 MB Flash
+- 512 + 16 + 4 KB SRAM
+- Flexible external memory controller with up to 32-bit data bus
+- Dual mode Quad-SPI
+- Chrom-ART Accelerator(DMA2D), graphical hardware accelerator enabling enhanced graphical user interface
+- Hardware JPEG codec
+- LCD-TFT controller supporting up to XGA resolution
+- MIPI |reg|  DSI host controller supporting up to 720p 30Hz resolution
+- 3x12-bit ADC with 24 channels
+- 2x12-bit D/A converters
+- DMA Controller
+- General Purpose Timers (15)
+- Watchdog Timers (2)
+- I2C (4)
+- USART/UART (8)
+- SPI (6)
+- SAI (2)
+- CAN (3)
+- SDMMC (2)
+- SPDIFRX interface
+- HDMI-CEC
+- MDIO slave interface
+- USB 2.0 full-speed device/host/OTG controller with on-chip PHY
+- USB 2.0 high-speed/full-speed device/host/OTG controller with dedicated DMA, on-chip full-speed PHY and ULPI
+- 10/100 Ethernet MAC with dedicated DMA: supports IEEE 1588v2 hardware, MII/RMII
+- 8- to 14-bit camera interface up to 54 Mbyte/s
+- True random number generator
+- CRC calculation unit
+- RTC: subsecond accuracy, hardware calendar
+- 96-bit unique ID
+
+More information about STM32F769NIH6 can be found here:
+
+- `STM32F769NIH6 on www.st.com`_
+- `STM32F76xxx reference manual`_
+
+Supported Features
+==================
+
+The Zephyr stm32f769i_disco board configuration 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                                |
++-----------+------------+-------------------------------------+
+
+Other hardware features are not yet supported on Zephyr porting.
+
+The default configuration can be found in the defconfig file:
+``boards/arm/stm32f769i_disco/stm32f769i_disco_defconfig``
+
+Pin Mapping
+===========
+
+STM32F769I Discovery kit has 9 GPIO controllers. These controllers are responsible for pin muxing,
+input/output, pull-up, etc.
+
+For mode details please refer to `32F769I-DISCO board User Manual`_.
+
+Default Zephyr Peripheral Mapping:
+----------------------------------
+- UART_1_TX : PA9
+- UART_1_RX : PA10
+- UART_6_TX : PC6
+- UART_6_RX : PC7
+- LD1 : PJ13
+- LD2 : PJ5
+- LD3 : PA12
+- LD4 : PD4
+
+System Clock
+============
+
+The STM32F769I System Clock can be driven by an internal or external oscillator,
+as well as by the main PLL clock. By default, the System clock is driven by the PLL
+clock at 216MHz, driven by a 25MHz high speed external clock.
+
+Serial Port
+===========
+
+The STM32F769I Discovery kit has up to 8 UARTs. The Zephyr console output is assigned to UART1
+which connected to the onboard ST-LINK/V2 Virtual COM port interface. Default communication
+settings are 115200 8N1.
+
+Programming and Debugging
+*************************
+
+Applications for the ``stm32f769i_disco`` board configuration can be built and
+flashed in the usual way (see :ref:`build_an_application` and
+:ref:`application_run` for more details).
+
+Flashing
+========
+
+STM32F769I Discovery kit includes an ST-LINK/V2 embedded debug tool interface.
+This interface is supported by the openocd version included in the Zephyr SDK.
+
+Flashing an application to STM32F769I
+-------------------------------------------
+
+First, connect the STM32F769I Discovery kit to your host computer using
+the USB port to prepare it for flashing. Then build and flash your application.
+
+Here is an example for the :ref:`hello_world` application.
+
+.. zephyr-app-commands::
+   :zephyr-app: samples/hello_world
+   :board: stm32f769i_disco
+   :goals: build flash
+
+Run a serial host program to connect with your board:
+
+.. code-block:: console
+
+   $ minicom -D /dev/ttyACM0
+
+You should see the following message on the console:
+
+.. code-block:: console
+
+   Hello World! arm
+
+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: stm32f769i_disco
+   :goals: debug
+
+
+.. _32F769I-DISCO website:
+   http://www.st.com/en/evaluation-tools/32f769idiscovery.html
+
+.. _32F769I-DISCO board User Manual:
+   http://www.st.com/resource/en/user_manual/dm00276557.pdf
+
+.. _STM32F769NIH6 on www.st.com:
+	https://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32-high-performance-mcus/stm32f7-series/stm32f7x9/stm32f769ni.html
+
+.. _STM32F76xxx reference manual:
+   http://www.st.com/resource/en/reference_manual/dm00224583.pdf

boards/arm/stm32f769i_disco/pinmux.c

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+/*
+ * Copyright (c) 2018 Yong Jin
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <kernel.h>
+#include <device.h>
+#include <init.h>
+#include <pinmux.h>
+#include <sys_io.h>
+
+#include <pinmux/stm32/pinmux_stm32.h>
+
+/* pin assignments for STM32F769I-DISCO board */
+static const struct pin_config pinconf[] = {
+#ifdef CONFIG_UART_STM32_PORT_1
+	{STM32_PIN_PA9, STM32F7_PINMUX_FUNC_PA9_USART1_TX},
+	{STM32_PIN_PA10, STM32F7_PINMUX_FUNC_PA10_USART1_RX},
+#endif	/* CONFIG_UART_STM32_PORT_1 */
+#ifdef CONFIG_UART_STM32_PORT_6
+	{STM32_PIN_PC6, STM32F7_PINMUX_FUNC_PC6_USART6_TX},
+	{STM32_PIN_PC7, STM32F7_PINMUX_FUNC_PC7_USART6_RX},
+#endif	/* CONFIG_UART_STM32_PORT_6 */
+};
+
+static int pinmux_stm32_init(struct device *port)
+{
+	ARG_UNUSED(port);
+
+	stm32_setup_pins(pinconf, ARRAY_SIZE(pinconf));
+
+	return 0;
+}
+
+SYS_INIT(pinmux_stm32_init, PRE_KERNEL_1,
+		CONFIG_PINMUX_STM32_DEVICE_INITIALIZATION_PRIORITY);

boards/arm/stm32f769i_disco/stm32f769i_disco.dts

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+/*
+ * Copyright (c) 2018 Yong Jin
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include <st/stm32f769.dtsi>
+
+/ {
+	model = "STMicroelectronics STM32F769I DISCOVERY board";
+	compatible = "st,stm32f769I-disco", "st,stm32f769";
+
+	chosen {
+		zephyr,console = &usart1;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		red_led_1:led@0 {
+			gpios = <&gpioj 13 GPIO_INT_ACTIVE_HIGH>;
+			label = "User LD1";
+		};
+		green_led_2:led@1 {
+			gpios = <&gpioj 5 GPIO_INT_ACTIVE_HIGH>;
+			label = "User LD2";
+		};
+		green_led_3:led@2 {
+			gpios = <&gpioa 12 GPIO_INT_ACTIVE_HIGH>;
+			label = "User LD3";
+		};
+		red_led_4:led@3 {
+			gpios = <&gpiod 4 GPIO_INT_ACTIVE_HIGH>;
+			label = "User LD4";
+		};
+	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		user_button: button@0 {
+			label = "User";
+			gpios = <&gpioa 0 GPIO_INT_ACTIVE_HIGH>;
+		};
+	};
+
+	aliases {
+		led0 = &red_led_1;
+		led1 = &green_led_2;
+		led2 = &green_led_3;
+		led3 = &red_led_4;
+		sw0 = &user_button;
+	};
+};
+
+&usart1 {
+	current-speed = <115200>;
+	pinctrl-names = "default";
+	status = "ok";
+};
+
+&usart6 {
+	current-speed = <115200>;
+	pinctrl-names = "default";
+	status = "ok";
+};

boards/arm/stm32f769i_disco/stm32f769i_disco.yaml

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+identifier: stm32f769i_disco
+name: STM32F769IDISCOVERY
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gccarmemb

boards/arm/stm32f769i_disco/stm32f769i_disco_defconfig

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+CONFIG_ARM=y
+CONFIG_BOARD_STM32F769I_DISCO=y
+CONFIG_SOC_SERIES_STM32F7X=y
+CONFIG_SOC_STM32F769XI=y
+# 216MHz system clock
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=216000000
+CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000
+
+CONFIG_SERIAL=y
+
+# console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# enable pinmux
+CONFIG_PINMUX=y
+
+# enable GPIO
+CONFIG_GPIO=y
+
+# clock configuration
+CONFIG_CLOCK_CONTROL=y
+
+# Clock configuration for Cube Clock control driver
+CONFIG_CLOCK_STM32_HSE_CLOCK=25000000
+CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
+# use HSE as PLL input
+CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
+# produce 216MHz clock at PLL output
+CONFIG_CLOCK_STM32_PLL_M_DIVISOR=25
+CONFIG_CLOCK_STM32_PLL_N_MULTIPLIER=432
+CONFIG_CLOCK_STM32_PLL_P_DIVISOR=2
+CONFIG_CLOCK_STM32_PLL_Q_DIVISOR=9
+CONFIG_CLOCK_STM32_AHB_PRESCALER=1
+CONFIG_CLOCK_STM32_APB1_PRESCALER=4
+CONFIG_CLOCK_STM32_APB2_PRESCALER=2

boards/arm/stm32f769i_disco/support/openocd.cfg

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+source [find board/stm32f7discovery.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
+}