本实验采用 ADC0809 做 A/D 转换实验。ADC0809 是一种8路模拟输入、8位数字输出的逐次逼近法A/D器件，转换时间约100us，转换精度为±1/512，适用于多路数据采集系统。ADC0809片内有三态输出的数据锁存器，故可以与8088微机总线直接接口。-In this study do ADC0809 A/D conversion experiments. ADC0809 is an 8-channel analog inputs, 8 digital outputs succ

m1602 四线驱动,不用8位总线,可以节省4条数据线-M1602 four line driver, need not 8-bit bus, can save four wires

LPC2000硬件I2C中断方式软件包。 主程序要配置好I2C总线接口(I2C引脚功能和I2C中断，并已使能I2C主模式)-LPC2000 I2C hardware interrupt way package.Good main program to configure the I2C bus interface (I2C with I2C interrupt pin function, and has set up a main mode) can make the I2C