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Yurii Hamann
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boards: arm: stm32: Support for STM32F746G Discovery board
Related to issue #6982 Signed-off-by: Yurii Hamann <yurii@hamann.site>
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‎boards/arm/stm32f746g_disco/CMakeLists.txt‎

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

‎boards/arm/stm32f746g_disco/Kconfig.board‎

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# Kconfig - STM32F746G Discovery board configuration
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#
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# Copyright (c) 2018 Yurii Hamann
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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config BOARD_STM32F746G_DISCO
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bool "STM32F746G Discovery Development Board"
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depends on SOC_STM32F746XG

‎boards/arm/stm32f746g_disco/Kconfig.defconfig‎

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# Kconfig - STM32F746G DISCOVERY board configuration
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#
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# Copyright (c) 2018 Yurii Hamann
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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if BOARD_STM32F746G_DISCO
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config BOARD
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default stm32f746g_disco
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if UART_CONSOLE
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config UART_STM32_PORT_1
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default y
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endif # UART_CONSOLE
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if GPIO_STM32
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config GPIO_STM32_PORTI
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default y
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endif # GPIO_STM32
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endif # BOARD_STM32F746G_DISCO

‎boards/arm/stm32f746g_disco/board.cmake‎

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

‎boards/arm/stm32f746g_disco/board.h‎

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/*
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* Copyright (c) 2018 Yurii Hamann
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef __INC_BOARD_H
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#define __INC_BOARD_H
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#include <soc.h>
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/* Create aliases to make the basic samples work */
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#define LED0_GPIO_PORT "GPIOI"
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#define LED0_GPIO_PIN 1
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#endif /* __INC_BOARD_H */

‎boards/arm/stm32f746g_disco/doc/img/en.stm32f746g-disco.jpg‎

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‎boards/arm/stm32f746g_disco/doc/stm32f746g_disco.rst‎

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.. _stm32f746g_disco_board:
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ST STM32F746G Discovery
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#######################
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Overview
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********
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The discovery kit enables a wide diversity of applications taking benefit from audio, multi-sensor support, graphics, security, video and high-speed connectivity features.
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- STM32F746NGH6 microcontroller featuring 1 Mbytes of Flash memory and 340 Kbytes of RAM, in BGA216 package
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- On-board ST-LINK/V2-1 supporting USB re-enumeration capability
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- Five power supply options:
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- ST LINK/V2-1
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- USB FS connector
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- USB HS connector
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- VIN from Arduino connector
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- External 5 V from connector
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- Two pushbuttons (user and reset)
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- USB functions: virtual COM port, mass storage, debug port
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- 4.3-inch 480x272 color LCD-TFT with capacitive touch screen
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- SAI audio codec
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- Audio line in and line out jack
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- Stereo speaker outputs
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- Two ST MEMS microphones
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- SPDIF RCA input connector
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- 128-Mbit Quad-SPI Flash memory
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- 128-Mbit SDRAM (64 Mbits accessible)
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- Connector for microSD card
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- USB OTG HS with Micro-AB connectors
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- USB OTG FS with Micro-AB connectors
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- Ethernet connector compliant with IEEE-802.3-2002
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.. image:: img/en.stm32f746g-disco.jpg
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:width: 500px
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:align: center
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:height: 357px
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:alt: STM32F746G-DISCO
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More information about the board can be found at the `32F746G-DISCO website`_.
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Hardware
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********
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STM32F746G Discovery kit provides the following hardware components:
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- STM32F746NGH6 in BGA216 package
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- ARM |reg| 32-bit Cortex |reg| -M7 CPU with FPU
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- 216 MHz max CPU frequency
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- VDD from 1.8 V to 3.6 V
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- 2 MB Flash
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- 384+4 KB SRAM including 64-Kbyte of core coupled memory
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- GPIO with external interrupt capability
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- LCD parallel interface, 8080/6800 modes
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- LCD TFT controller supporting up to XGA resolution
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- MIPI |reg| DSI host controller supporting up to 720p 30Hz resolution
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- 3x12-bit ADC with 24 channels
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- 2x12-bit D/A converters
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- RTC
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- Advanced-control Timer
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- General Purpose Timers (17)
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- Watchdog Timers (2)
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- USART/UART (8)
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- I2C (3)
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- SPI (6)
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- 1xSAI (serial audio interface)
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- SDIO
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- 2xCAN
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- USB 2.0 OTG FS with on-chip PHY
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- USB 2.0 OTG HS/FS with dedicated DMA, on-chip full-speed PHY and ULPI
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- 10/100 Ethernet MAC with dedicated DMA
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- 8- to 14-bit parallel camera
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- CRC calculation unit
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- True random number generator
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- DMA Controller
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More information about STM32F746NGH6 can be found here:
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- `STM32F746NGH6 on www.st.com`_
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- `STM32F74xxx reference manual`_
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Supported Features
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==================
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The Zephyr stm32f746g_disco board configuration supports the following hardware features:
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+-----------+------------+-------------------------------------+
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| Interface | Controller | Driver/Component |
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+===========+============+=====================================+
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| NVIC | on-chip | nested vector interrupt controller |
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+-----------+------------+-------------------------------------+
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| UART | on-chip | serial port-polling; |
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| | | serial port-interrupt |
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+-----------+------------+-------------------------------------+
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| PINMUX | on-chip | pinmux |
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+-----------+------------+-------------------------------------+
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| GPIO | on-chip | gpio |
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+-----------+------------+-------------------------------------+
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Other hardware features are not yet supported on Zephyr porting.
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The default configuration can be found in the defconfig file:
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``boards/arm/stm32f746g_disco/stm32f746g_disco_defconfig``
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Pin Mapping
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===========
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STM32F746G Discovery kit has 9 GPIO controllers. These controllers are responsible for pin muxing,
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input/output, pull-up, etc.
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For mode details please refer to `32F746G-DISCO board User Manual`_.
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Default Zephyr Peripheral Mapping:
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----------------------------------
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- UART_1_TX : PA9
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- UART_1_RX : PB7
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- UART_3_TX : PC6
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- UART_3_RX : PC7
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- LD1 : PI1
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System Clock
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============
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STM32F746G System Clock could be driven by internal or external oscillator,
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as well as main PLL clock. By default System clock is driven by PLL clock at 216MHz,
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driven by 25MHz high speed external clock.
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Serial Port
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===========
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The STM32F746G Discovery kit has up to 8 UARTs. The Zephyr console output is assigned to UART1.
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Default settings are 115200 8N1.
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Programming and Debugging
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*************************
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Applications for the ``stm32f746g_disco`` board configuration can be built and
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flashed in the usual way (see :ref:`build_an_application` and
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:ref:`application_run` for more details).
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Flashing
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========
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STM32F746G Discovery kit includes an ST-LINK/V2 embedded debug tool interface.
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This interface is supported by the openocd version included in Zephyr SDK.
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Flashing an application to STM32F746G
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-------------------------------------------
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First, connect the STM32F746G Discovery kit to your host computer using
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the USB port to prepare it for flashing. Then build and flash your application.
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Here is an example for the :ref:`hello_world` application.
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: stm32f746g_disco
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:goals: build flash
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Run a serial host program to connect with your board:
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.. code-block:: console
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$ minicom -D /dev/ttyACM0
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You should see the following message on the console:
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.. code-block:: console
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Hello World! arm
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Debugging
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=========
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You can debug an application in the usual way. Here is an example for the
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:ref:`hello_world` application.
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: stm32f746g_disco
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:goals: debug
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.. _32F746G-DISCO website:
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http://www.st.com/en/evaluation-tools/32f746gdiscovery.html
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.. _32F746G-DISCO board User Manual:
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http://www.st.com/resource/en/user_manual/dm00190424.pdf
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.. _STM32F746NGH6 on www.st.com:
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http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32-high-performance-mcus/stm32f7-series/stm32f7x6/stm32f746ng.html
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.. _STM32F74xxx reference manual:
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http://www.st.com/resource/en/reference_manual/dm00124865.pdf

‎boards/arm/stm32f746g_disco/pinmux.c‎

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/*
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* Copyright (c) 2018 Yurii Hamann
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <kernel.h>
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#include <device.h>
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#include <init.h>
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#include <pinmux.h>
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#include <sys_io.h>
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#include <pinmux/stm32/pinmux_stm32.h>
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/* pin assignments for STM32F746G-DISCO board */
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static const struct pin_config pinconf[] = {
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#ifdef CONFIG_UART_STM32_PORT_1
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{STM32_PIN_PA9, STM32F7_PINMUX_FUNC_PA9_USART1_TX},
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{STM32_PIN_PB7, STM32F7_PINMUX_FUNC_PB7_USART1_RX},
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#endif /* CONFIG_UART_STM32_PORT_1 */
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#ifdef CONFIG_UART_STM32_PORT_6
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{STM32_PIN_PC6, STM32F7_PINMUX_FUNC_PC6_USART6_TX},
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{STM32_PIN_PG7, STM32F7_PINMUX_FUNC_PC7_USART6_RX},
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#endif /* CONFIG_UART_STM32_PORT_6 */
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};
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static int pinmux_stm32_init(struct device *port)
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{
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ARG_UNUSED(port);
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stm32_setup_pins(pinconf, ARRAY_SIZE(pinconf));
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return 0;
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}
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SYS_INIT(pinmux_stm32_init, PRE_KERNEL_1,
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CONFIG_PINMUX_STM32_DEVICE_INITIALIZATION_PRIORITY);

‎boards/arm/stm32f746g_disco/stm32f746g_disco.dts‎

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/*
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* Copyright (c) 2018 Yurii Hamann
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/dts-v1/;
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#include <st/stm32f746.dtsi>
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/ {
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model = "STMicroelectronics STM32F746G DISCOVERY board";
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compatible = "st,stm32f746g-disco", "st,stm32f746";
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chosen {
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zephyr,console = &usart1;
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zephyr,sram = &sram0;
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zephyr,flash = &flash0;
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};
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};
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&usart1 {
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current-speed = <115200>;
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pinctrl-names = "default";
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status = "ok";
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};

‎boards/arm/stm32f746g_disco/stm32f746g_disco.yaml‎

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identifier: stm32f746g_disco
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name: STM32F746GDISCOVERY
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type: mcu
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arch: arm
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toolchain:
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- zephyr
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- gccarmemb

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