lcd.c

智能车源代码

#include <intrins.h>						 
#include <AT89X51.h>
/*--------------------系统变量定义------------------*/
//LCD模块
#define LCD_RW  			P2_6 					//读写控制端
#define LCD_RS  			P2_7					//数据命令选择端
#define LCD_E   			P2_5					//执行使能端
#define LCD_Data			P1  					//P1口
#define Write				0x00					//低电平写入
#define	Read				0x01					//高电平读出
#define	Data				0x01					//高电平选择数据
#define	Cmd					0x00					//低电平选择命令

#define Enable				0x00					//跃变到低电平时执行命令 
#define	Disable				0x01    
#define True				0x01
#define	False				0x00
#define LCD_Init			0x38					//初始化模式							
#define LCD_DispCtr    		0x0C					//开显示及光标设置
#define LCD_CloseCtr		0x08					//关显示
#define LCD_CLS        		0x01					//清屏幕
#define LCD_EnterSet   		0x06					//显示光标  
#define Busy				P1_7					//忙信号


//测速/测距/测时模块
#define CircleLength		0x0C					//小车转一轮的长度为12cm

//控速模块
#define P00					P0_0  
#define LowSpeedHighTime 	0x04
#define HighSpeedHighTime	0x08 



/*--------------------------------------------------*/

/*--------------------全局函数----------------------*/
//LCD显示模块
void LCDInit(void);									//LCD初始化
void SetWriteCmd(void);								//设置写命令模式
void SetReadCmd(void);								//设置读命令模式
void SetWriteData(void);							//设置写数据模式
void WriteCmd(char cmd);							//写命令
void WriteData(char ddata);							//写数据
void ExecuteCmd(void);								//执行命令
void SetXY(char x,char y);							//定位显示地址
void DisplaySingleChar(char x,char y,char cchar);	//显示单个字符
void DisplayString(char x,char y,char *str); 		//显示一段字符串
void Delay(unsigned int time);						//延时主程序
void DelayUs(unsigned int time);					//延时子程序
bit  IsBusy(void);									//判断忙标志函数
void DisplayTime(void);								//显示时间
void DisplaySpeedANDDistance(void);					//显示速度和时间
void DisplayAverageSpeed(void);						//显示平均速度


//测速/测距/测时模块					 	
void INTInit(void);				          			//所有中断初始化
void Clock0_Init(void);					  			//时钟0中断初始化
void SpeedINT(void);					   			//测速中断
void Time0INT(void);					  			//测速单位时间中断

//控速模块
void CtrSpeedINT(void);            		 			//控速中断
void Time1INT(void);				       			//控速单位时间中断
void Clock1_Init(void);             	   			//时钟1中断初始化
void CtrSpeed(void);

/*--------------------------------------------------*/


/*--------------------全局变量----------------------*/
char SpeedCount = 0;			      				//测速计数脉冲
char SpeedStr[] = "V:";					    		//速度提示符
char SpeedUnitStr[] = "cm/s";                       //速度单位提示符
int  Speed = 0;										//速度显示
char TimeStr[] = "T:";								//小车行走时间提示符
char TimeUnitStr[] = "s";                           //时间单位提示符
int  Time0INTCount = 0;              				//T0中断时间计时
char DistanceStr[] = "S:";                	        //行走路程提示符
char DistanceUnitStr[] = "cm";                      //路程单位提示符
int  Distance = 0;                 					//行走路程

char Time;							   				//高电平持续时间变量
char Period=0x0A;									//输出方波周期
char Area=0;										//区域变量
char HighTime;										//高电平持续时间
char Time1INTCount=0;								//T1中断时间计时 
char PassTime=0;									//小车行走的时间
char DisplaySwitch=0;								//显示切换变量
bit  IsT0INT;									    //判断T0是否已经响应中断

char Maker[]="106Pro";								    //制作单位名称
int  AverageSpeed;

/*---------------------主函数-----------------------*/
void main()
{
	INTInit();										//初始化所有中断
	Clock0_Init();                 					//初始化时钟中断0
	Clock1_Init();      							//初始化时钟中断1
	Delay(40);										//延时等待LCD启动
	LCDInit();										//初始化LCD
	DisplayString(0x0A,0,TimeStr);				    //显示时间提示符
	DisplayString(0x0F,0,TimeUnitStr);
	DisplayString(0,0,SpeedStr);					//显示速度提示符
	DisplayString(0x05,0,SpeedUnitStr);
	DisplayString(0,1,DistanceStr);			        //显示路程提示符
	DisplayString(0x06,1,DistanceUnitStr);
	DisplayString(0x0A,1,Maker)	;					//显示制作单位
	while(1)
	{
		if (IsT0INT==1 && Area>=1 && Area<6)
			DisplayTime();
	    if (IsT0INT==1 && Area>=6)
			{
			DisplayAverageSpeed();
			EX0=0;
			ET0=0;
			P00=0;
			}
	}
	while(1);										//等待中断,循环处理
}



void LCDInit(void)
{
    //三次显示模式设置
	LCD_Data=0;
	LCD_E=Disable;
	Delay(5);
	WriteCmd(LCD_Init);
	Delay(5);
	WriteCmd(LCD_Init);
	Delay(5);
	WriteCmd(LCD_Init);

	WriteCmd(LCD_Init);	   							//初始化
	WriteCmd(LCD_CloseCtr);							//关显示
	WriteCmd(LCD_CLS);								//清屏幕
	WriteCmd(LCD_EnterSet);							//光标移动设置
	WriteCmd(LCD_DispCtr);							//显示开以及光标设置
	
}

void SetWriteCmd(void)
{
	LCD_RW=Write;
	LCD_RS=Cmd;
}

void SetReadCmd(void)
{
	LCD_RW=Read;
	LCD_RS=Cmd;
}

void SetWriteData(void)
{
	LCD_RW=Write;
	LCD_RS=Data;
}


void WriteCmd(char cmd)
{
	while(IsBusy());
	LCD_Data=cmd;	
	SetWriteCmd();
	ExecuteCmd();
}

void WriteData(char ddata)
{
	while(IsBusy());
	LCD_Data=ddata;
	SetWriteData();	
	ExecuteCmd();
}

void ExecuteCmd(void)
{
	LCD_E=Enable;
	LCD_E=Disable;
}

void SetXY(char x,char y)
{
	if (y)
		x|=0x40;
	x|=0x80;
	Delay(5);
	WriteCmd(x);

}

void DisplaySingleChar(char x,char y,char cchar)
{
	SetXY(x,y);
	WriteData(cchar);	
}

void DisplayString(char x,char y,char *str)
{
	while(*str)
	{
		Delay(5);
		DisplaySingleChar(x++,y,*str);
		str++;
	}
}

void Delay(unsigned int time)
{
    unsigned int timeCounter = 0;
	for (timeCounter = time;timeCounter > 0 ;timeCounter --)
		DelayUs(255);
}

void DelayUs(unsigned int time)
{
	unsigned int timeCounter = 0;
	for (timeCounter = 0;timeCounter < time;timeCounter ++)
		_nop_();
}

bit IsBusy(void)
{
	LCD_Data=0xFF;
	SetReadCmd();
	ExecuteCmd();
	return (bit)(P1 & 0x80);	
}

void INTInit(void)
{
	EA=1;			//开总中断
	EX0=1;			//开INTO中断
	IT0=1;			//INTO边沿触发
	PX0=1;          //INTO优先级为高级
	EX1=1;			//开INT1中断
	IT1=1;			//INT1边沿触发
	PX1=1;          //INT1优先级为高级
	
	TMOD=0x01;		//T0定时方式1
	ET0=0x01;		//开T0中断
	ET1=0x01;       //开T1中断
	

	Time=0;
	HighTime=LowSpeedHighTime;

}

/*-----------------中断处理----------------------*/

void SpeedINT(void) interrupt 0 using 0
{
	SpeedCount++;	 	
}

void Time0INT(void) interrupt 1 using 1
{
	Clock0_Init();
	Time0INTCount++;
	if (Time0INTCount == 20)   	        			     //1S时间到
	{
		EX0=0x00;              							//关INT0中断
		IsT0INT=1;
	    DisplaySpeedANDDistance();
	    SpeedCount=0;
	    Time0INTCount=0;			       				  //计数清0
		EX0=0x01;										//重开INT0
	}
														  
}

void CtrSpeedINT(void) interrupt 2 using 2
{
	TR1=0x00;										//关闭T1计时
	Area++;
	if (Area==2)   		              	 			//区域1--低速区
		HighTime=LowSpeedHighTime;		
	else if (Area==3)								//区域2--高速区
		HighTime=HighSpeedHighTime;			  
	else if (Area==4)			    	  			//区域3--低速区
	 	HighTime=LowSpeedHighTime;		 	
	else if (Area>4 && Area<6)
		HighTime=LowSpeedHighTime;
	else 
		HighTime=0;			                        //经过3个区域后停止
	if (Area<6)
		TR1=0x01;								    //重新开启T1	
}

void Time1INT(void) interrupt 3 using 3
{
	Clock1_Init();
	CtrSpeed();
}

void Clock0_Init(void)
{
	TR0=0x01;		//启动T0
	TH0=0x3C;		//定时初值				   		
	TL0=0x0B0;		
}

void Clock1_Init(void) 
{
	TR1=0x01;       //启动T1
	TH1=0x3C;		//定时初值
	TL1=0x0B0;
}

void DisplayTime(void)
{
	char PassTime1=0x30;
	char PassTime2=0x30;
	IsT0INT=0;
	PassTime++;
	PassTime1+=(PassTime%10);
	if (PassTime > 9)
		PassTime2+=(PassTime/10);

	DisplaySingleChar(0x0D,0,PassTime2);		     
	DisplaySingleChar(0x0E,0,PassTime1);
}

void CtrSpeed(void)
{	
	//方波控制--速度控制
	if (++Time==HighTime)		  
		P00=0;
    if (Time==Period)
	{
		P00=1;
		Time=0;
	}		
}

void DisplaySpeedANDDistance(void)
{
	char Speed1=0x30;							         //初始化为0的ASCII码
	char Speed2=0x30;
	char Distance1=0x30;
	char Distance2=0x30;
	char Distance3=0x30;
	char Distance4=0x30;
	Speed=SpeedCount*CircleLength;							 //计算速度
	Speed1+=(Speed%10);                  		     //取个位数
	Speed2+=(Speed/10);			   					 //取十位数
	
	Distance+=Speed;              					 //路程计算
	
	Distance1+=(Distance%10);
	Distance4+=(Distance/1000);
		
	if (Distance > 99)
		Distance2+=(Distance/10%10);
	else 
     	Distance2+=(Distance/10);

    if (Distance > 999)
		Distance3+=(Distance/100%10);
	else 
     	Distance3+=(Distance/100);
        
					   		 
	DisplaySingleChar(0x3,0,Speed2); 				  //显示速度
	DisplaySingleChar(0x4,0,Speed1);  
	
	DisplaySingleChar(0x02,1,Distance4);			 
	DisplaySingleChar(0x03,1,Distance3);        	  //显示路程		 
	DisplaySingleChar(0x04,1,Distance2);
	DisplaySingleChar(0x05,1,Distance1);			 

	
}

void DisplayAverageSpeed(void)
{
    char AverageSpeed1=0x30;							         //初始化为0的ASCII码
	char AverageSpeed2=0x30;
	AverageSpeed=Distance/PassTime%100;
	AverageSpeed1+=(AverageSpeed%10);                  		     //取个位数
	AverageSpeed2+=(AverageSpeed/10);	
	
	DisplaySingleChar(0x3,0,AverageSpeed2); 				   //显示平均速度
	DisplaySingleChar(0x4,0,AverageSpeed1);

}