mcu# This chapter introduces the mcu function of LuatOS. You can select the corresponding chip to view the tutorial. air101 Introduction Hardware preparation Software part Set the main frequency and query the set main frequency Get Device Unique id Get the number of ticks after startup and the number of ticks per second Convert decimal number to hexadecimal string output air103 Introduction Hardware preparation Software part Set the main frequency and query the set main frequency Get Device Unique id Get the number of ticks after startup and the number of ticks per second Convert decimal number to hexadecimal string output air105 Introduction Hardware preparation Software part Query main frequency Get Device Unique id Get the number of ticks after startup and the number of ticks per second Convert decimal number to hexadecimal string output Obtain the high-precision tick after startup and calculate the difference between the two ticks.