stm32f4_examples

Some example code of STM32F4 for beginners.

Development platform and hardware

GNU/Linux and GCC toolchain are used, and the code have been tested on STM32F407-Discovery board.

For Peripheral manipulation examples:

1. GPIO Output (LED)
2. PWM
3. UART read and write

• Type command sudo screen /dev/ttyUSB0 9600 to test the program

4. DMA (using UART as example)
5. Systick
6. CRC
7. Flash
8. USB VCP (Virtual COM Port)

For FreeRTOS examples:

1. Task creation
2. Semaphore
3. Queue

Fixing USB device premission denied error for GNU screen

sudo gpasswd --add username dialout

Developement environment setup

Here we provide a brief tutorial of setting up the environment (i.e., GCC toolchain, debugger, flash tool)

0.Prerequisite

sudo apt install build-essential git zlib1g-dev libsdl1.2-dev automake* autoconf* libtool libpixman-1-dev lib32gcc1 lib32ncurses5 libc6:i386 libncurses5:i386 libstdc++6:i386 libusb-1.0.0-dev

1.OpenOCD

git clone git://git.code.sf.net/p/openocd/code openocd
cd openocd
./bootstrap
./configure --prefix=/usr/local  --enable-jlink --enable-amtjtagaccel --enable-buspirate  --enable-stlink   --disable-libftdi
echo -e "all:\ninstall:" > doc/Makefile
make -j4
sudo make install

2. ST-LINK

git clone http://github.com/texane/stlink.git
cd stlink
mkdir build
cd build
cmake ..
make -j4
sudo make install
#sudo cp 49-stlinkv2.rules /etc/udev/rules.d/

3. ARM GCC toolchain 9

wget https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2019q4/gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2
tar jxf ./gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2
rm gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2

edit "~/.bashrc" and append the following instruction:

PATH=$PATH:~/workspace/tools/gcc-arm-none-eabi-9-2019-q4-major/bin

4. Restart the terminal

References

• NCKU Wikipedia: http://wiki.csie.ncku.edu.tw/embedded/Lab25