单片机控制二氧化碳传感器程序6页.doc

#include /头文件#include #define uchar unsigned char /宏定义无符号字符型#define uint unsigned int /宏定义无符号整型typedef unsigned char BYTE;typedef bit BOOL; sbit ST=P30; /A/D启动转换信号sbit OE=P31; /数据输出允许信号sbit EOC=P32; /A/D转换结束信号sbit CLK=P33; /时钟脉冲 sbit LCD_RS = P20; sbit LCD_RW = P21;sbit LCD_EN = P22;uchar m;uint AD0809,i,cdisplay,ppm;uint ppmdou;/定义数据类型void delay(int ms) / 延时