[嵌入式]基于51单片机的便携式一氧化碳检测仪毕设论文

#include <AT89X52.H>      //调用外函数//
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <LCD.h> /**********初始化CPU************/
void init_cpu()           //初始化cPu
{        EA=1;
		TR0=1;
		TR1=1;
		TMOD=0x11;
		TH1=0x3c;
		TL1=0xb0;
}
/*void time1(void) interrupt 3 using 1
	{    
TH1=(65536-50000)/256;
		TL1=(65536-50000)%256;
        keyval=P1;  
} *                        //初始化CPU结束//
void main_menu_initial()	         //LCD主菜单初始化.//
{
	main1_menu[0].menu_count=4;	       //有4个菜单项.//
	main1_menu[0].display=measurearray;   //定义一个”开始测量“数组//
	main1_menu[0].subs=NULL;		 
	main1_menu[0].children_menus=measure_menu;	//当前菜单子菜单的指针
	main1_menu[0].parent_menus=NULL;
}
void measure_menu_initial()             //“开始测量”菜单设置//
{
    measure_menu[0].menu_count=2;
    measure_menu[0].display=qr;			 //开始测量函数,  确认.
	 measure_menu[0].subs=start_measure_function;  //开始测量函数
	 measure_menu[0].children_menus=NULL;
	 measure_menu[0].parent_menus=main1_menu;
	 measure_menu[1].menu_count=2;
	 measure_menu[1].display=qx;		     //开始测量函数,  取消.
    measure_menu[1].subs=NULL;
    measure_menu[1].children_menus=NULL;
	 measure_menu[1].parent_menus=main1_menu;	
}
  //还有void store_menu_initial()、void time_menu_initial()//
void led_menu_pro()               {
	max_item=menu_led->menu_count;
	switch(keyval)
	{
		case 0: break;
		case 1:				   //向上键.
			if(user_choosen==0)
			{			
				user_choosen=max_item;
			}
			shuaxin=1;
			user_choosen--;
			break;
		}
……                  //“向上”“向下”“确认”“取消”键//
if(shuaxin)					//是否需要刷新LCD标志位.
	{   Clr_Scr(); 
		shuaxin=0;
	}
		led_menu_show();	
}
v oid led_menu_show()	
{
	uchar n;
	max_item=menu_led->menu_count;
	if (max_item>=4)				   //菜单项为3则表示为主菜单.
	{				
		for(n=0;n<4;n++)
		{  draw_bmp(n*2,20,96,0,menu_led[n].display);
		}
		select_item(user_choosen);		  //标记出当前菜单项.
	}
	else
	{
		switch(temp_choosen)
		{   case 0:
			draw_bmp(0,20,96,0,measurearray);     //“开始测量”数组//
				break;
			……
	          default:
				break;
		}
		for(n=0;n<max_item;n++)
		{
			draw_bmp((n+1)*2,20,32,0,menu_led[n].display);
		}
		select_item(user_choosen+1);	}	} 	 

链接：https://pan.baidu.com/s/13uLhLh8sI4KmetrOutMd8w
提取码：jcse