Using LCD1602 to display ultrasonic ranging

Introduce

One 、 Devices needed

1. 51 Single chip microcomputer ： Any one can , What I use here is STC89C52
2. LCD1602 display ： What I use here is LCD1602A Eight digit display without adapter , It's a normal one .
3. Ultrasonic ranging module ： There are many choices according to the price , I recommend using HC-SR04, Because it's cheap ...
4. There are several DuPont lines ： Use a mother to mother DuPont line here .

Two 、 principle

LCD1602 How to use the display screen is described in detail in my blog .LCD1602 Introduce
The principle and usage of ultrasonic module are introduced in this blog . Introduction of ultrasonic ranging module
Of course , I'm in the following code , There will be a lot of comments , So that you can understand .