這是本文件的舊版！
Dev tool
yaourt -S gcc-arm-none-eabi-bin eclipse-arm gnuarmeclipse-qemu-bin pacman -S ddd openocd stlink arm-none-eabi-gdb
ref:
ARM Cortex-M
https://www.youtube.com/watch?v=15z_vn4H41U
Getting started ARM cortex M4 STM32 with Eclipse in Linux
https://www.youtube.com/watch?v=HKX12hJApZM
STM32/ARM Cortex-M3 HOWTO: Development under Ubuntu (Debian)
https://fun-tech.se/stm32/OpenOCD/gdb.php
ARM debugging with gdb
https://www.youtube.com/watch?v=2kLK_sdvC3Q
Embedded Systems Programming on ARM Cortex-M3/M4
https://www.udemy.com/embedded-system-programming-on-arm-cortex-m3m4
What is the booting process for ARM?
http://stackoverflow.com/questions/6139952/what-is-the-booting-process-for-arm
mbed OS handbook
https://docs.mbed.com/docs/mbed-os-handbook/en/latest/
zephyr
