这是一个比较典型的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。由于单片机的处理速度和ram资源的限制，一般不采用浮点数运算，而将所有参数全部用整数，运算

到最后再除以一个2的N次方数据（相当于移位），作类似定点数运算，可大大提高运算速度，根据控制精度的不同要求，当精度要求很高时，注意保留移位引起的“余数”，做好余数补偿。这个程序只是一般常用pid算法的基本架构，没有包含输入输出处理部分。-This is a relatively typical PID process, in the use of single-chip microcomputer as the control cpu, please make some simplification, the specific PID parameters must be determined through experiments at specific audiences. As the single-chip processing speed and ram resource constraints, generally do not use floating-point, and will use all parameters of all integers, computing the final 2 and then divided by a N-th power of data (equivalent to shift), similar fixed-point computation can be greatly enhanced speed of operation, according to the different requirements of control precision, when high accuracy, the attention to retain the shift caused by　the balance , do a good job in the balance of compensation. This procedure is commonly used algorithm pid basic structure does not contain input and output processing section.