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