Adafruit Feather STM32F405 Express

The Adafruit Feather STM32F405 is a tiny ARM development board based on the ST Micro STM32F405 family of microcontrollers.

Interfaces

Interface	Hardware Supported	TinyGo Support
GPIO	YES	YES
UART	YES	YES
SPI	YES	YES
I2C	YES	YES
ADC	YES	YES
PWM	YES	Not yet
USBDevice	YES	Not yet

Pins

Pin	Hardware pin	Alternative names
`D0`	`PB11`	`UART1_RX_PIN`, `UART0_RX_PIN`, `UART_RX_PIN`, `I2C2_SDA_PIN`
`D1`	`PB10`	`UART1_TX_PIN`, `UART0_TX_PIN`, `UART_TX_PIN`, `I2C2_SCL_PIN`
`D2`	`PB3`	`SPI2_SCK_PIN`
`D3`	`PB4`	`SPI2_SDI_PIN`
`D4`	`PB5`	`SPI2_SDO_PIN`
`D5`	`PC7`	`UART2_RX_PIN`
`D6`	`PC6`	`UART2_TX_PIN`
`D7`	`PA15`
`D8`	`PC0`	`LED_NEOPIXEL`, `WS2812`
`D9`	`PB8`	`I2C3_SDA_PIN`
`D10`	`PB9`	`I2C3_SCL_PIN`
`D11`	`PC3`
`D12`	`PC2`
`D13`	`PC1`	`LED_RED`, `LED_BUILTIN`, `LED`
`D14`	`PB7`	`UART3_RX_PIN`, `I2C1_SDA_PIN`, `I2C0_SDA_PIN`, `I2C_SDA_PIN`, `SDA_PIN`
`D15`	`PB6`	`UART3_TX_PIN`, `I2C1_SCL_PIN`, `I2C0_SCL_PIN`, `I2C_SCL_PIN`, `SCL_PIN`
`D16`	`PA4`	`A0`
`D17`	`PA5`	`A1`, `SPI3_SCK_PIN`
`D18`	`PA6`	`A2`, `SPI3_SDI_PIN`
`D19`	`PA7`	`A3`, `SPI3_SDO_PIN`
`D20`	`PC4`	`A4`
`D21`	`PC5`	`A5`
`D22`	`PA3`	`A6`
`D23`	`PB13`	`SPI1_SCK_PIN`, `SPI0_SCK_PIN`, `SPI_SCK_PIN`
`D24`	`PB14`	`SPI1_SDI_PIN`, `SPI0_SDI_PIN`, `SPI_SDI_PIN`
`D25`	`PB15`	`SPI1_SDO_PIN`, `SPI0_SDO_PIN`, `SPI_SDO_PIN`
`D26`	`PC8`
`D27`	`PC9`
`D28`	`PC10`
`D29`	`PC11`
`D30`	`PC12`
`D31`	`PD2`
`D32`	`PB12`
`D33`	`PC14`
`D34`	`PC15`
`D35`	`PA11`
`D36`	`PA12`
`D37`	`PA13`
`D38`	`PA14`

Machine Package Docs

Documentation for the machine package for the Adafruit Feather STM32F405

Flashing

Flashing this board using its DFU bootloader can be a bit cumbersome, but it is possible - without requiring an external programmer - by pulling the B0 pin high (you can use the board’s 3.3V output pin) at bootup when connected to host PC via USB. This puts the device in bootloader mode. For more information see Adafruit docs.

Once in bootloader mode, the device can be programmed using the open-source tool dfu-util.

CLI Flashing on Linux

You must first install the dfu-util program in order to flash the Adafruit Feather STM32F405 board.

sudo apt update 
sudo apt install dfu-util

CLI Flashing on macOS

You must first install the dfu-util program in order to flash the Adafruit Feather STM32F405 board. You can do this using Homebrew on macOS:

brew install dfu-util

CLI Flashing on Windows

You must first install the dfu-util program in order to flash the Adafruit Feather STM32F405 board.

Download dfu-util from the website here: http://dfu-util.sourceforge.net/releases/dfu-util-0.9-win64.zip
Decompress the files to a directory such as C:\dfu-util
Add C:\dfu-util to your PATH.

Troubleshooting

If you run into trouble getting dfu-util installed and working on Windows, see the blog post at https://www.hanselman.com/blog/HowToFixDfuutilSTMWinUSBZadigBootloadersAndOtherFirmwareFlashingIssuesOnWindows.aspx

Notes

Goes here

Last modified May 13, 2023: Fix link to DFU Description. (#319) (13f653f)