STM32 Make process

We need 4 utilities for STM32 :

1. st-flash : debian package stlink-tools
2. arm-none-eabi-gcc : debian package binutils-arm-none-eabi
3. arm-none-eabi-size : debian package binutils-arm-none-eabi
4. arm-none-eabi-objcopy : debian package binutils-arm-none-eabi

Install with :

sudo apt install stlink-tools binutils-arm-none-eabi

Use the Makefile after that.

Build and flash as :

make all
make flash