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