STM32F4 Discovery
Overview
The STM32F4DISCOVERY Discovery kit features an ARM Cortex-M4 based STM32F407VG MCU with a wide range of connectivity support and configurations Here are some highlights of the STM32F4DISCOVERY board:
STM32 microcontroller in LQFP100 package
Extension header for all LQFP100 I/Os for quick connection to prototyping board and easy probing
On-board ST-LINK/V2 debugger/programmer with SWD connector
Flexible board power supply:
USB VBUS or external source(3.3V, 5V, 7 - 12V)
Power management access point
Eight LEDs:
USB communication (LD1)
3.3 V power on (LD2)
Four user LEDs: orange (LD3), green (LD4), red (LD5), and blue (LD6)
2 USB OTG LEDs for VBUS (LD7) and over-current (LD8)
Two push-buttons: USER and RESET
USB OTG FS with micro-AB connector
LIS302DL or LIS3DSH ST MEMS 3-axis accelerometer
MP45DT02 ST-MEMS audio sensor omni-directional digital microphone
CS43L22 audio DAC with integrated class D speaker driver
More information about the board can be found at the STM32F4DISCOVERY website.
Hardware
STM32F4DISCOVERY Discovery kit provides the following hardware components:
STM32F407VGT6 in LQFP100 package
ARM® 32-bit Cortex® -M4 CPU with FPU
168 MHz max CPU frequency
VDD from 1.8 V to 3.6 V
1 MB Flash
192+4 KB SRAM including 64-Kbyte of core coupled memory
GPIO with external interrupt capability
3x12-bit ADC with 24 channels
2x12-bit D/A converters
RTC
Advanced-control Timer
General Purpose Timers (17)
Watchdog Timers (2)
USART/UART (6)
I2C (3)
SPI (3)
SDIO
2xCAN
USB 2.0 OTG FS with on-chip PHY
USB 2.0 OTG HS/FS with dedicated DMA, on-chip full-speed PHY and ULPI
10/100 Ethernet MAC with dedicated DMA
8- to 14-bit parallel camera
CRC calculation unit
True random number generator
DMA Controller
- More information about STM32F407VG can be found here:
Supported Features
The Zephyr stm32f4_disco board configuration supports the following hardware features:
Interface |
Controller |
Driver/Component |
|---|---|---|
NVIC |
on-chip |
nested vector interrupt controller |
UART |
on-chip |
serial port-polling; serial port-interrupt |
PINMUX |
on-chip |
pinmux |
GPIO |
on-chip |
gpio |
PWM |
on-chip |
pwm |
USB |
on-chip |
usb |
CAN |
on-chip |
CAN controller |
Note
CAN feature requires CAN transceiver, such as SK Pang CAN breakout board. Zephyr default configuration uses CAN_2 exclusively, as simultaneous use of CAN_1 and CAN_2 is not yet supported.
Other hardware features are not yet supported on Zephyr porting.
The default configuration can be found in boards/st/stm32f4_disco/stm32f4_disco_defconfig
Pin Mapping
STM32F4DISCOVERY Discovery kit has 8 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.
For more details please refer to STM32F4DISCOVERY board User Manual.
Default Zephyr Peripheral Mapping:
UART_1_TX : PB6
UART_1_RX : PB7
UART_2_TX : PA2
UART_2_RX : PA3
USER_PB : PA0
LD3 : PD13
LD4 : PD12
LD5 : PD14
LD6 : PD15
USB DM : PA11
USB DP : PA12
CAN1_RX : PB8
CAN1_TX : PB9
CAN2_RX : PB5
CAN2_TX : PB13
System Clock
STM32F4DISCOVERY System Clock could be driven by internal or external oscillator, as well as main PLL clock. By default System clock is driven by PLL clock at 168MHz, driven by 8MHz high speed external clock.
Serial Port
STM32F4DISCOVERY Discovery kit has up to 6 UARTs. The Zephyr console output is assigned to UART2. Default settings are 115200 8N1. Please note that ST-Link Virtual Com Port is not wired to chip serial port. In order to enable console output you should use a serial cable and connect it to UART2 pins (PA2/PA3).
Programming and Debugging
STM32F4DISCOVERY Discovery kit includes an ST-LINK/V2 embedded debug tool interface.
Applications for the stm32f4_disco board configuration can be built and
flashed in the usual way (see Building an Application and
Run an Application for more details).
Flashing
The board is configured to be flashed using west STM32CubeProgrammer runner, so its installation is required.
Alternatively, OpenOCD or JLink can also be used to flash the board using
the --runner (or -r) option:
$ west flash --runner openocd
$ west flash --runner jlink
Flashing an application to STM32F4DISCOVERY
Here is an example for the Blinky application.
Run a serial host program to connect with your board:
$ minicom -D /dev/ttyACM0
Build and flash the application:
# From the root of the zephyr repository
west build -b stm32f4_disco samples/basic/blinky
west flash
You should see user led “LD4” blinking.
Debugging
You can debug an application in the usual way. Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b stm32f4_disco samples/hello_world
west debug