Feather STM32F405 Express
Overview
The Adafruit Feather STM32F405 is an ARM Development board in the Feather standard layout, sharing peripheral placement with other devices labeled as Feathers or FeatherWings. The board is equipped with a lithium ion battery charger, native USB C connector, 2MB of external flash memory, and SD card socket.
Hardware
STM32F405 Cortex M4 with FPU and 1MB Flash, 168MHz speed
192KB RAM total - 128 KB RAM + 64 KB program-only/cache RAM
USB C power and data
LiPo connector and charger
SD socket on the bottom, connected to SDIO port
2 MB SPI Flash chip
Built in NeoPixel indicator
I2C, UART, GPIO, ADCs, DACs
Qwiic/STEMMA-QT connector for fast I2C connectivity
SWD SMT mount region on board underside.
Supported Features
The adafruit_feather_stm32f405 board supports the hardware features listed below.
- on-chip / on-board
- Feature integrated in the SoC / present on the board.
- 2 / 2
-
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files. -
vnd,foo -
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M4F CPU1 |
|
ADC |
on-chip |
STM32F4 ADC1 |
|
on-chip |
STM32 ADC2 |
||
CAN |
on-chip |
STM32 CAN controller2 |
|
Clock control |
on-chip |
STM32 RCC (Reset and Clock controller)1 |
|
on-chip |
STM32 HSE Clock1 |
||
on-chip |
|||
on-chip |
STM32F4 Main PLL1 |
||
on-chip |
STM32F4 PLL I2S1 |
||
on-chip |
STM32 Microcontroller Clock Output (MCO)2 |
||
Counter |
on-chip |
STM32 counters12 |
|
DAC |
on-chip |
STM32 family DAC1 |
|
DMA |
on-chip |
STM32 DMA controller (V1)2 |
|
Flash controller |
on-chip |
STM32 Family flash controller1 |
|
GPIO & Headers |
on-chip |
STM32 GPIO Controller9 |
|
on-board |
GPIO pins exposed on Adafruit Feather headers1 |
||
I2C |
on-chip |
||
I2S |
on-chip |
STM32 I2S controller2 |
|
Interrupt controller |
on-chip |
ARMv7-M NVIC (Nested Vectored Interrupt Controller)1 |
|
on-chip |
STM32 External Interrupt Controller1 |
||
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
Memory controller |
on-chip |
STM32 Battery Backed RAM1 |
|
MMC |
on-chip |
STM32 SDMMC Disk Access1 |
|
MTD |
on-chip |
STM32F4 flash memory1 |
|
on-board |
Properties supporting Zephyr spi-nor flash driver (over the Zephyr SPI API) control of serial flash memories using the standard M25P80-based command set1 |
||
PHY |
on-chip |
This binding is to be used by all the usb transceivers which are built-in with USB IP2 |
|
Pin control |
on-chip |
STM32 Pin controller1 |
|
PWM |
on-chip |
STM32 PWM12 |
|
Reset controller |
on-chip |
STM32 Reset and Clock Control (RCC) Controller1 |
|
RNG |
on-chip |
STM32 Random Number Generator1 |
|
RTC |
on-chip |
STM32 RTC1 |
|
Sensors |
on-chip |
STM32 quadrature decoder6 |
|
on-chip |
STM32 family TEMP node for production calibrated sensors with two calibration temperatures1 |
||
on-chip |
STM32 VREF+1 |
||
on-chip |
STM32 VBAT1 |
||
Serial controller |
on-chip |
||
on-chip |
STM32 UART2 |
||
SMbus |
on-chip |
STM32 SMBus controller3 |
|
SPI |
on-chip |
||
SRAM |
on-chip |
Generic on-chip SRAM1 |
|
Timer |
on-chip |
ARMv7-M System Tick1 |
|
on-chip |
STM32 timers14 |
||
USB |
on-chip |
STM32 OTGFS controller1 |
|
on-chip |
STM32 OTGHS controller1 |
||
Watchdog |
on-chip |
STM32 watchdog1 |
|
on-chip |
STM32 system window watchdog1 |
Connections and IOs
The Adafruit Feather STM32F405 Express Learn site [1] has detailed information about the board including pinouts [2] and the schematic [3].
System Clock
The STM32F405 is configured to use the 12MHz HSE Oscillator to produce a 168MHz system clock.
Serial Port
The STM32F405 UART 3 peripheral is available on the TX (PB10) and RX (PB11) pins.
I2C Port
The STM32F405 I2C1 peripheral is available on the SDA (PB7) and SCL (PB6) pins.
SPI Port
The STM32F405 SPI2 peripheral is available on the SCK (PB13), MI (PB14) and MO (PB15) pins.
SPI1 uses SCK (PB3), MI (PB4), MO (PB5) and SS (PA15) pins and is dedicated to the 2 MB SPI Flash chip.
Programming and Debugging
The adafruit_feather_stm32f405 board supports the runners and associated west commands listed below.
DFU-Util programming is supported through Zephyr by default. Set up of the built in DFU-Util bootloader is possible by following the instructions on the Learn website [4].
Flashing
Build the Zephyr kernel and the Blinky sample application:
west build -b adafruit_feather_stm32f405 samples/basic/blinky
On the Adafruit Feather STM32F405, connect the 3.3V pin to the B0 boot pin with a jumper wire.
Flash the image:
west build -b adafruit_feather_stm32f405 samples/basic/blinky west flash
You should see the D13 LED blinking.