With "rookies", we will introduce the basics and experiments of ARM Cortex-
M3 from code writing to hardware details from the shallower to the deeper. There are 13 chapters in total, including: registers, setting up a project, "Hello world" experiment (Part 1) explaining how the program works, "Hello world" experiment (Part 2) executing the program, clock, Thumb command, project example: radio frequency identification triggering electromagnetic Coils, programming examples, usage of If statements, what are special registers, instruction sets, bit operations, and introduction to CMSIS.