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ST-LinkV2 (stm32f4-Discovery)

SWD can be used to upload the firmware to stm32fx MCU.

A ST-Link is needed, any stm32-discovery board has a ST-LinkV2 on it (starts @ 8€). stm32vl discovery has a ST-LinkV1.

A standard ST-Link costs from 17€

SWD Header

Pin\Function CN2 Use
●1 VDD_Target Voltage supply for target
2 SWDCLK SWD clock
3 GND Ground
4 SWDIO SWD data input/output
5 NRST reset for target
6 SWO reserved

Needed Tools

st-flash and st-util are needed Tools from texane

download and compile

git clone git:// stlink
cd stlink

copy in the suitable directory (so it can be accessed direct with terminal, without enviroment variable)

sudo cp st-flash /usr/bin
sudo cp st-util /usr/bin

add udev rules (replace user with your username)

sudo cp /home/user/stlink/49-stlinkv*.rules /etc/udev/rules.d
sudo udevadm control --reload-rules

For ST-LinkV1 take a look at the readme.txt !

Test it

To copy the file from the MCU

st-flash read ~/STM32F4-Discovery.bin 0x8000000 0x100000

Output (just a example for the factory preload image)

INFO src/stlink-usb.c: -- exit_dfu_mode
INFO src/stlink-common.c: Loading device parameters....
src/stlink-common.c: Device connected is: F4 device, id 0x10016413
INFO src/stlink-common.c: SRAM size: 0x30000 bytes (192 KiB), Flash: 0x100000 bytes (1024 KiB) in pages of 16384 bytes

stm32f4-discovery shoud be found at /dev/stlinkv2_2 how can that be tested ? please fix me :)

usb device

Bus 002 Device 007: ID 0483:3748 SGS Thomson Microelectronics ST-LINK/V2


Connect the ST-Link to the MCU. If a complete stm32fx-discovery board is used, CN3 jumpers need to be set. To program a external MCU, remove CN3 jumpers and connect the external MCU with the SWD header.

To use SWD
To use stlink (requires line above)