89C51单片机，通过键盘输入预设值，与DS18B20测得的实际值做比较，然后驱动制冷或加热电路。用keil C语言来实现PID的控制。 ,89C51 microcontroller, through keyboard input default, and DS18B20 measured to compare the actual value, and then drive circuit refrigeration or heating. Keil C language used to a

这是从网上找来的一个比较典型的PID处理程序，在使用单片机作为控制cpu时，请稍作简化，具体的PID参数必须由具体对象通过实验确定。-It is recruited from the Internet in a typical PID handler in the use of SCM as a control cpu, make some simplification, the specific PID parameters must be experimentally determined

一个比较典型的PID处理程序，在使用单片机作为控制cpu时，请稍作简化，具体的PID 参数必须由具体对象通过实验确定-A typical PID process, the use of SCM control cpu, please slightly simplified, specific PID parameters must be determined by the specific object through experiments