STM32F4Discovery

Support for the STM32F4Discovery board. More...

Detailed Description

Support for the STM32F4Discovery board.

Overview

See this page for a quick getting started guide.

Hardware

MCU

MCU	STM32F407VGT6
Family	ARM Cortex-M4
Vendor	ST Microelectronics
Package	LQFP100
RAM	192Kb (128Kb RAM + 64Kb CCMRAM)
Flash	1024Kb
Frequency	up to 168MHz
FPU	yes
Timers	14 (12x 16bit, 2x 32bit [TIM2 + TIM5])
ADCs	3x 16 channel 6 to 12-bit
UARTs	6
SPIs	3
I2Cs	3
Vcc	2.0V - 3.6V
Datasheet	Datasheet
Reference Manual	Reference Manual
Programming Manual	Programming Manual
Board Manual	Board Manual

RIOT pin mapping

Please refer to this document for the RIOTs pin mapping for the stm32f4discovery board. The pin mapping is chosen completely arbitrary and can be altered by editing the boards/stm32f4discovery/include/periph_conf.h header file.

User Interface

2 Buttons:

NAME	USER	RESET
Pin	PA0 (IN)	NRST

6 User controllable LEDs:

NAME	LD3	LD4	LD5	LD6	LD7	LD8
Color	orange	green	red	blue	green	red
Pin	PD13	PD12	PD14	PD15	PA9	PD5

LEDs LD7 and LD8 are used by the USB connector for over-current (LD8) and data (LD7) indication.

Accelerometer

The STM32F4discovery board contains a 3-axis MEMS accelerometer that can sample with up to 1.6kHz.

Sensor	LIS3DSH
Type	Accelerometer
Vendor	ST Microelectronics
Datasheet	Datasheet
Connected to	SPI_0
Pin Config:
Device	SPI1
SCK	PA5 (OUT, SPI1_SCK)
MISO	PA6 (IN, SPI1_MISO)
MOSI	PA7 (OUT, SPI1_MOSI)
INT1	PE0 (IN)
INT2	PE1 (IN)
CS	PE3 (OUT)

Digital Microphone

The STM32F4discovery board contains a on-board MEMS audio sensor.

Sensor	MP45DT02
Type	Audio sensor
Vendor	ST Microelectronics
Datasheet	Datasheet
Connected to	n/a
Pin Config:
Device	I2S2
CLK	PB10
DOUT	PC3

Audio DAC with integrated class D speaker driver

The board contains an digital analog converter (DAC) with integrated class D speaker driver.

Device	CS43L22
Type	DAC
Vendor	Cirrus Logic
Datasheet	Datasheet
Connected to	DAC + I2C + I2S
Pin Config:
Device	DAC1 + I2C1 + I2S3
AIN1	PA4 (DAC1_OUT)
SCL	PB6 (I2C1_SCL)
SDA	PB9 (I2C1_SDA)
MCLK	PC7 (I2S3_MCK)
SCLK	PC10 (I2S3_CK)
SDIN	PC12 (I2S3_SD)
RESET	PD4 (OUT)

Supported Toolchains

For using the STM32F4discovery board we strongly recommend the usage of the GNU Tools for ARM Embedded Processors toolchain.

Alternative way to flash

Using openocd to flash the RIOT binary to the board

1. Compile your code to have a .hex file
2. Connect the board with the mini usb cable, on the debugger side to your PC
3. run openocd with $ sudo /usr/local/bin/openocd -f interface/stlink-v2.cfg -f target/stm32f4x_stlink.cfg
4. in a new terminal connect: telnet 127.0.0.1 4444
5. run:

   > flash banks
   #0 : stm32f4x.flash (stm32f2x) at 0x08000000, size 0x00100000, buswidth 0,
   chipwidth 0
    
   > halt
   target state: halted
   target halted due to debug-request, current mode: Thread
   xPSR: 0x21000000 pc: 0x0800251a msp: 0x20000c4c
    
   > flash write_image erase unlock /home/c/git/RIOT-
   OS/RIOT/examples/ipc_pingpong/bin/stm32f4discovery/ipc_pingpong.hex 0
   auto erase enabled
   auto unlock enabled
   target state: halted
   target halted due to breakpoint, current mode: Thread
   xPSR: 0x61000000 pc: 0x20000042 msp: 0x20000c4c
   wrote 16384 bytes from file /home/c/git/RIOT-
   OS/RIOT/examples/ipc_pingpong/bin/stm32f4discovery/ipc_pingpong.hex in 1.200528s
   (13.327 KiB/s)
    
   > reset

The board is now flashed with your RIOT binary

Using UART

1. connect your usb tty to: RX=PA3 TX=PA2 and GND=GND
   • PA3 is connected with TX on the UART converter
   • PA2 is connected with RX on the UART converter
2. done

Known Issues / Problems

I2C

When connecting an I2C device and a logic analyzer to an I2C port at the same time, the internal pull-up resistors are not sufficient for stable bus operation. You probably have to connect external pull-ups to both bus lines. 10K is a good value to start with.

OS X & make term

If you want the terminal to work using make term command and get a message about missing tty device install the driver from https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers .

Files
file	arduino_board.h
	Board specific configuration for the Arduino API.
file	arduino_pinmap.h
	Mapping from MCU pins to Arduino pins.
file	board.h
	Board specific definitions for the STM32F4Discovery evaluation board.
file	gpio_params.h
	Board specific configuration of direct mapped GPIOs.
file	periph_conf.h