51 MCU timer 0 is used as time reference and delay function reference

51 MCU timer 0 It is used as time benchmark and delay function reference

---

• Proteus Simulation demonstration is used as delay
  

This is similar to Arduino Inside delay() The time delay function .

• Because of the variable unsigned long The scope is limited , Overflow time is not considered for the time being .
  
• Overflow time ：
  4294967295/86400/1000 = 49.71026961805556（ God ）

As a reference code for millisecond delay

#include<reg52.h>
//#include<intrins.h>
sbit LED