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

Stm32f4discovery with RIOT pin names

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 orangegreen 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 http://www.silabs.com/products/mcu/pages/usbtouartbridgevcpdrivers.aspx .

Files

file  stm32f4discovery/include/arduino_board.h
 Board specific configuration for the Arduino API.
 
file  stm32f4discovery/include/arduino_pinmap.h
 Mapping from MCU pins to Arduino pins.
 
file  stm32f4discovery/include/board.h
 Board specific definitions for the STM32F4Discovery evaluation board.
 
file  boards/stm32f4discovery/include/periph_conf.h