基于51单片机MAX197的AD转换程序，1602显示，八路输出，还有电机，蜂鸣器报警，主动式查询，1000次采样取平均值后再送显示，流畅无压力。代码解析说明齐全-Based on 51 single chip microcomputer MAX197 the AD conversion program, 1602 display, eight-channel output, and motor, buzzer alarm, active inquiry, 1000 times sampling