For the stm32f4 we have to do a cross-compilation, the cross-compiler that we used is summon-arm-toolchain.

• Download it:

  cd local/src/
  git clone https://github.com/esden/summon-arm-toolchain.git # or --> git clone git://github.com/esden/summon-arm-toolchain.git

• Install needed dependencies (README):

  sudo apt-get install flex libgmp3-dev libmpfr-dev libncurses5-dev libmpc-dev autoconf texinfo build-essential libftdi-dev

• If you installed ROS before, then you have to unset some environment variables:

  unset LIBRARY_PATH; unset LD_LIBRARY_PATH; unset CFLAGS; unset LDFLAGS; unset CPATH;   

• Finally we run the excecutable file>

  cd ~/local/src/summon-arm-toolchain 
  ./summon-arm-toolchain

• Download it

   cd local/src
   git clone git://github.com/libopencm3/libopencm3.git

• To make it easier to use, we put it in the path:

   nano ~/.bashrc

• In the export PATH add this line:

  ${HOME}/sat/bin:

• Reload it

  cd ~
  . .bashrc

• Finally build it:

  cd local/src/libopencm3/
  make

Stlink is going to be use to flash our program

• Compile and install

  cd ~/local/src
  git clone git://github.com/texane/stlink.git
  cd stlink
  ./autogen.sh
  ./configure --prefix=${HOME}/local/DIR/stlink
  make
  make install
  cd ~/local/DIR
  xstow stlink
      

• To enable the usb port, we must copy to files from stlink directory to /etc/udev/rules.d and then restart it

 sudo cp 49-stlinkv1.rules /etc/udev/rules.d/
 sudo cp 49-stlinkv2.rules /etc/udev/rules.d/

• Compiling fancyblink

  cd ~/local/src/libopencm3/examples/stm32/f4/stm32f4-discovery/fancyblink
  make clean
  make
  st-flash erase #this might not be necessary
  st-flash write fancyblink.bin 0x8000000

Touch the reset button… and now we can see the fancyblink

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