154 lines
4.9 KiB
ReStructuredText
154 lines
4.9 KiB
ReStructuredText
.. _stm32f401_mini:
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STM32 Mini F401
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###############
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Overview
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********
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The STM32 Mini F401 is an extremely low cost and bare-bones
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development board featuring the STM32F401CC, see `STM32F401CC website`_.
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More info about the board with schematics available `here <stm32-base-board-page_>`_
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.. image:: img/STM32_Mini_F401-1.jpg
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:align: center
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:alt: STM32 Mini F401
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Hardware
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********
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The STM32F401CC based board provides the following
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hardware components:
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- STM32F401CCU6 in UFQFPN48 package
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- ARM |reg| 32-bit Cortex |reg| -M4 CPU with FPU
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- 84 MHz max CPU frequency
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- VDD from 1.7 V to 3.6 V
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- 256 KB Flash
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- 64 KB SRAM
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- GPIO with external interrupt capability
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- 1x12-bit, 2.4 MSPS ADC with 16 channels
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- DMA Controller
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- Up to 11 Timers (six 16-bit, two 32-bit, two watchdog timers and a SysTick timer)
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- USART/UART (3)
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- I2C (3)
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- SPI/I2S (4)
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- SDIO
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- USB 2.0 full-speed device/host/OTG controller with on-chip PHY
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- CRC calculation unit
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- 96-bit unique ID
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- RTC
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Supported Features
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==================
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The Zephyr stm32f401_mini board configuration supports the following
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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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| SYSTICK | on-chip | system clock |
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+------------+------------+-------------------------------------+
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| UART | on-chip | serial port |
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+------------+------------+-------------------------------------+
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| GPIO | on-chip | gpio |
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+------------+------------+-------------------------------------+
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| PINMUX | on-chip | pinmux |
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+------------+------------+-------------------------------------+
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| FLASH | on-chip | flash |
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+------------+------------+-------------------------------------+
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| SPI | on-chip | spi |
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+------------+------------+-------------------------------------+
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| I2C | on-chip | i2c |
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+------------+------------+-------------------------------------+
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| ADC | on-chip | ADC Controller |
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+------------+------------+-------------------------------------+
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| USB OTG FS | on-chip | USB device |
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+------------+------------+-------------------------------------+
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The default configuration can be found in
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:zephyr_file:`boards/others/stm32f401_mini/stm32f401_mini_defconfig`
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Default Zephyr Peripheral Mapping:
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----------------------------------
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- UART_1 TX/RX : PA9/PA10
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- I2C1 SCL/SDA : PB8/PB9
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- SPI1 CS/SCK/MISO/MOSI : PA4/PA5/PA6/PA7
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- PWM_4_CH1 : PB6
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- PWM_4_CH2 : PB7
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- ADC_1 : PA1
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- SW0 : PB2 (routed to BOOT1 dip switch)
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- LED0 : PC13
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Clock Sources
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-------------
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The board has two external oscillators. The frequency of the slow clock (LSE) is
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32.768 kHz. The frequency of the main clock (HSE) is 25 MHz.
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The default configuration sources the system clock from the PLL, which is
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derived from HSE, and is set at 84MHz.
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Programming and Debugging
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*************************
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There are 2 main entry points for flashing STM32F4X SoCs, one using the ROM
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bootloader, and another by using the SWD debug port (which requires additional
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hardware). Flashing using the ROM bootloader requires a special activation
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pattern, which can be triggered by using the BOOT0 pin, which on this board
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is a dip switch.
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Flashing
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========
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Installing dfu-util
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-------------------
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It is recommended to use at least v0.8 of `dfu-util`_. The package available in
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debian/ubuntu can be quite old, so you might have to build dfu-util from source.
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There is also a Windows version which works, but you may have to install the
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right USB drivers with a tool like `Zadig`_.
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Flashing an Application
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-----------------------
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Connect a USB-C cable and the board should power ON. Force the board into DFU mode
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by setting the BOOT0 dip switch position to ON. Reset the board with the NRST button.
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The dfu-util runner is supported on this board and so a sample can be built and
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tested easily.
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.. zephyr-app-commands::
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:zephyr-app: samples/basic/blinky
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:board: stm32f401_mini
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:goals: build flash
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Debugging
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=========
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The board can be debugged by installing the included 100 mil (0.1 inch) header,
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and attaching an SWD debugger to the 3V3 (3.3V), GND, SCK, and DIO
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pins on that header.
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References
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**********
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.. target-notes::
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.. _Zadig:
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https://zadig.akeo.ie/
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.. _stm32-base-board-page:
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https://stm32-base.org/boards/STM32F401CCU6-STM32-Mini-F401
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.. _dfu-util:
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http://dfu-util.sourceforge.net/build.html
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.. _STM32F401CC website:
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https://www.st.com/en/microcontrollers-microprocessors/stm32f401cc.html
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