STM8S003F只有一个串口，项目中需要两个串口，因此采用IO口模拟一个串口。 此程序也是经理给的，经过测试可以用，不过需要耐心阅读一下程序，理解串口程序的思路，能够正确读写串口温度传感器的温度值(STM8S003F has only one serial port, and two serial ports are needed in the project, so IO port is used to simulate a serial port. This program is also given by the manager, after testing can be used, but need to read the program patiently, understand the idea of the serial program, can correctly read and write the temperature value of the serial temperature sensor.)