基于单片机室内有害气体监测系统

1475下载地址 https://docs.qq.com/doc/DWEpnR2pOWU91b3p4?pub=1&dver=2.1.0

 

#include<reg52.h>    
#include <intrins.h>

#define ulong unsigned long
#define uchar unsigned char
#define uint unsigned int
#define LCD1602_PORT P1		
#define  PCF8591 0x90    
#define  NOP()   _nop_()   
#define  _Nop()  _nop_()  


sbit SCL=P2^1;       
sbit SDA=P2^0;       
sbit LCD1602_RS = P2^5;	 
sbit LCD1602_RW = P2^4;	 
sbit LCD1602_EN = P2^3;	
bit ack;     
sbit key1= P0^4;
sbit key2 = P0^5;
sbit buzz = P2^6;
int g=50;
void delay_ms(uint n)	
{
	unsigned int  i,j;
	for(i=0;i<n;i++)
		for(j=0;j<123;j++);