一个很好的单片机按键处理子程序

这是一个用于实际产品的stc单片机按键处理程序头文件和原理图可从原帖下载:http://www.51hei.com/bbs/dpj-19294-1.html

#include "STC12C5620AD.H"#include "Key_Scan.H"#include "Key_Handle.H"#include "DS1302.H"#include "Radio.H"#include "Channel_Handle.H"#include "Volume_Handle.H"/********************** 声明外部变量**************************/extern uchar Volume;			//Volume_Handle.cextern uint PLL;  				//From Radio.cextern bit Flag_40ms;	  		//From Main.cextern uchar Work_Mode;   		//From Main.cextern uchar data Sec;			//From DS1302.cextern uchar data Min;		    //From DS1302.cextern uchar data Hour;			//From DS1302.cextern uchar data Date;			//From DS1302.cextern uchar data Month;		//From DS1302.cextern uchar data Day;		    //From DS1302.cextern uchar data Year;			//From DS1302.cextern uchar Display_Channel[];			//From Main.c/********************** 定义变量**************************/uchar Radio_Index;					 	//预置电台切换计数，0-15，8用于记录最后一次的电台uchar Key_Flag=0x00;   			 		//按键计时，有按键时清零，无按键10S左右使Woke_Mode=0;/********************** 按键处理**************************/void Key_Handle(){uchar Time_Write_Temp;			  		 		//调整用的缓存uchar Key_Value;Radio_Index=EEPROM_Get_Index();	 				//获取频道序号Display_Channel[3]=(Radio_Index/10)|0x30;			 Display_Channel[4]=(Radio_Index%10)|0x30;		//显示频道序号if(Flag_40ms){Key_Value=Key_Scan();			   		//40ms进行一次扫描Flag_40ms=0;Key_Flag++;if(Key_Flag>=250){Key_Flag=250;LCD_BLK=0;Work_Mode=0;					  //无按键10s后，自动回到模式0}elseLCD_BLK=1;}switch (Key_Value){case 0x0e:		                  //按下MENUswitch (Work_Mode){case 0:Work_Mode=1;	  //进入电台搜索break;case 1:Work_Mode=2;	  //进入调节年份break;case 2:Work_Mode=3;	  //进入调节月份break;case 3:Work_Mode=4;	  //进入调节日break;case 4:Work_Mode=5;	  //进入调节星期break;case 5:Work_Mode=6;	  //进入调节时break;case 6:Work_Mode=7;	  //进入调节分break;case 7:DS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x80,0x00);      //秒置0DS1302_Write_Data(0x8e,0x80);      // 开启写保护Work_Mode=0;	  //回到正常显示break;default:break;}Key_Flag=0;  //清除按键计时break;case 0x0d:		 //按下|>4)*10+(Year&0x0f);	 //装换成十进制数if(Time_Write_Temp==0){Time_Write_Temp=99;}else{Time_Write_Temp--;}Year=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x8c,Year);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 3:				 //月减少 Time_Write_Temp=(Month>>4)*10+(Month&0x0f);	 //装换成十进制数if(Time_Write_Temp==1){Time_Write_Temp=12;}else{Time_Write_Temp--;}Month=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x88,Month);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 4:				 //日减少 Time_Write_Temp=(Date>>4)*10+(Date&0x0f);	 //装换成十进制数if(Time_Write_Temp==1){Time_Write_Temp=31;}else{Time_Write_Temp--;}Date=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x86,Date);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 5:				 //星期减少 Time_Write_Temp=(Day>>4)*10+(Day&0x0f);	 //装换成十进制数if(Time_Write_Temp==1){Time_Write_Temp=7;}else{Time_Write_Temp--;}Day=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x8a,Day);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 6:				 //时减少 Time_Write_Temp=(Hour>>4)*10+(Hour&0x0f);	 //装换成十进制数if(Time_Write_Temp==0){Time_Write_Temp=23;}else{Time_Write_Temp--;}Hour=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x84,Hour);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 7:				 //分减少 Time_Write_Temp=(Min>>4)*10+(Min&0x0f);	 //装换成十进制数if(Time_Write_Temp==0){Time_Write_Temp=59;}else{Time_Write_Temp--;}Min=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x82,Min);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 8:             //音量调节Volume+=5;		   		     	//音量减小5dBif(Volume>=35)Volume=35;Volume_Write(Volume);			//写入声音参数break;default:break;}Key_Flag=0;  //清除按键计时break;case 0x0b:		 //按下>>|switch (Work_Mode){case 0:				 //正常状态Radio_Index++;	    //下一个预置电台if(Radio_Index==16)Radio_Index=1;EEPROM_Write_Index(Radio_Index);  	  //更新新电台序号PLL=EEPROM_Get_PLL(Radio_Index);	  //更新新电台PLLTEA5767_Update_PLL();			  //写入PLLbreak;case 1:TEA5767_User_Search(1);	  //向上手动搜索break;case 2:				 //年增加 Time_Write_Temp=(Year>>4)*10+(Year&0x0f);	 //装换成十进制数if(Time_Write_Temp==99){Time_Write_Temp=0;}else{Time_Write_Temp++;}Year=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x8c,Year);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 3:				 //月增加 Time_Write_Temp=(Month>>4)*10+(Month&0x0f);	 //装换成十进制数if(Time_Write_Temp==12){Time_Write_Temp=1;}else{Time_Write_Temp++;}Month=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x88,Month);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 4:				 //日增加 Time_Write_Temp=(Date>>4)*10+(Date&0x0f);	 //装换成十进制数if(Time_Write_Temp==31){Time_Write_Temp=1;}else{Time_Write_Temp++;}Date=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x86,Date);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 5:				 //星期增加 Time_Write_Temp=(Day>>4)*10+(Day&0x0f);	 //装换成十进制数if(Time_Write_Temp==7){Time_Write_Temp=1;}else{Time_Write_Temp++;}Day=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x8a,Day);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 6:				 //时增加 Time_Write_Temp=(Hour>>4)*10+(Hour&0x0f);	 //装换成十进制数if(Time_Write_Temp==23){Time_Write_Temp=0;}else{Time_Write_Temp++;}Hour=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x84,Hour);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 7:				 //分增加 Time_Write_Temp=(Min>>4)*10+(Min&0x0f);	 //装换成十进制数if(Time_Write_Temp==59){Time_Write_Temp=0;}else{Time_Write_Temp++;}Min=(Time_Write_Temp/10)<4|(Time_Write_Temp%10);	 //装换成BCDDS1302_Write_Data(0x8e,0x00);      // 禁止写保护DS1302_Write_Data(0x82,Min);           //写入DS1302_Write_Data(0x8e,0x80);      // 开启写保护break;case 8:             //音量调节if(Volume<=0)Volume=0;				elseVolume-=5;				    //音量增加5dBVolume_Write(Volume);			//写入声音参数break;default:break;}Key_Flag=0;  //清除按键计时break;case 0x07:		 //按下SET{	switch (Work_Mode){case 0:		  //正常状态Work_Mode=8;			//转到音量调节状态break;case 1:		  //电台搜索EEPROM_Save_PLL(Radio_Index,PLL);    //存入新收到的电台Work_Mode=0;break;case 8:		  //音量调节状态Work_Mode=0;			//转到正常状态break;default:DS1302_Write_Data(0x8e,0x00);        // 禁止写保护DS1302_Write_Data(0x80,0x00); 	     //置秒为00，并启动时钟DS1302_Write_Data(0x8e,0x80);        // 开启写保护Work_Mode=0;break;}								}Key_Flag=0;  //清除按键计时break;default:break;}		}