51

51单片机大量源码

#include <at89x51.h>
#include "KBCODE.H"
#define LCM_RS    P2_0
#define LCM_RW    P2_1 //定义LCD引脚
#define LCM_E     P2_2
#define LCM_Data  P0
#define Busy 0x80 //用于检测LCM状态字中的Busy标识
#define Key_Data  P3_2 //定义Keyboard引脚
#define Key_CLK   P3_3
void LCMInit(void);
void DisplayOneChar(unsigned char X,unsigned char Y,unsigned char DData);
void DisplayListChar(unsigned char X,unsigned char Y,unsigned char code *DData);
void Delay5Ms(void);
void Delay400Ms(void);
void Decode(unsigned char ScanCode);
void WriteDataLCM(unsigned char WDLCM);
void WriteCommandLCM(unsigned char WCLCM,BuysC);
unsigned char ReadStatusLCM(void);
unsigned char code cdle_net[] = {"RICHMCU PS2 TEST"};
unsigned char code email[] = {"WWW.RICHMCU.COM"};
unsigned char code Cls[] =   {"                "};
static unsigned char IntNum = 0; //中断次数计数
static unsigned char KeyV; //键值
static unsigned char DisNum = 0; //显示用指针
static unsigned char Key_UP=0, Shift = 0;//Key_UP是键松开标识，Shift是Shift键按下标识
static unsigned char BF = 0; //标识是否有字符被收到

void main(void)
{
	unsigned char TempCyc;

	Delay400Ms(); //启动等待，等LCM讲入工作状态
	LCMInit(); //LCM初始化 


	DisplayListChar(0, 0, cdle_net);
	DisplayListChar(0, 1, email);
	for(TempCyc=0; TempCyc<10; TempCyc++) {
		Delay400Ms(); //延时
	}
	DisplayListChar(0, 1, Cls);

	IT1 = 0; //设外部中断1为低电平触发
	EX1 = 1; //开中断
	EA = 1;

	while(1) {
		if(BF)
			Decode(KeyV);
		else {
			EA = 1; //开中断
		}
	}
}

//写数据
void WriteDataLCM(unsigned char WDLCM) 
{
	ReadStatusLCM(); //检测忙
	LCM_Data = WDLCM;
	LCM_RS = 1;
	LCM_RW = 0;
	LCM_E = 0; //若晶振速度太高可以在这后加小的延时
	LCM_E = 0; //延时		
	LCM_E = 1;
}

//写指令
void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测
{
	if(BuysC) ReadStatusLCM(); //根据需要检测忙
	LCM_Data = WCLCM;
	LCM_RS = 0;
	LCM_RW = 0;
	LCM_E = 0;
	LCM_E = 0;
	
	LCM_E = 1; 
}


//读状态
unsigned char ReadStatusLCM(void)
{
	LCM_Data = 0xFF; 
	LCM_RS = 0;
	LCM_RW = 1;
	LCM_E = 0;
	LCM_E = 1;
	while(LCM_Data & Busy); //检测忙信号

	return(LCM_Data);
}

void LCMInit(void) //LCM初始化
{
	LCM_Data = 0;
	WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号
	Delay5Ms(); 
		Delay5Ms(); 
	WriteCommandLCM(0x38,0);
	Delay5Ms(); 
		Delay5Ms(); 
	WriteCommandLCM(0x38,0);
	Delay5Ms();
		Delay5Ms();  

	WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号
	WriteCommandLCM(0x08,1); //关闭显示
	WriteCommandLCM(0x01,1); //显示清屏 
	WriteCommandLCM(0x06,1); // 显示光标移动设置
	WriteCommandLCM(0x0F,1); // 显示开及光标设置
}

//按指定位置显示一个字符
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
	Y &= 0x1;
	X &= 0xF; //限制X不能大于15，Y不能大于1
	if(Y)
		X |= 0x40; //当要显示第二行时地址码+0x40;
	X |= 0x80; //算出指令码
	WriteCommandLCM(X, 1); //发命令字
	WriteDataLCM(DData); //发数据
}

//按指定位置显示一串字符
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
{
	unsigned char ListLength;

	ListLength = 0;
	Y &= 0x1;
	X &= 0xF; //限制X不能大于15，Y不能大于1
	while (DData[ListLength]>0x19) {//若到达字串尾则退出
		if(X <= 0xF) {//X坐标应小于0xF
			DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
			ListLength++;
			X++;
		}
	}
}

//5ms延时
void Delay5Ms(void)
{
	unsigned int TempCyc = 5552;
	while(TempCyc--)
		;
}

//400ms延时
void Delay400Ms(void)
{
	unsigned char TempCycA = 5;
	unsigned int TempCycB;
	while(TempCycA--) {
		TempCycB=7269;
		while(TempCycB--)
			;
	}
}

void Keyboard_out(void) interrupt 2
{
	if((IntNum > 0) && (IntNum < 9)) {
		KeyV >>= 1;			//因键盘数据是低>>高，结合上一句所以右移一位
		if(Key_Data) {
			KeyV |= 0x80;	//当键盘数据线为1时为1到最高位
		}
	}
	IntNum++;
	while(!Key_CLK);		//等待PS/2CLK拉高
	if(IntNum > 10) {
		IntNum = 0;			//当中断10次后表示一帧数据收完，清变量准备下一次接收
		BF = 1;				//标识有字符输入完了
		EA = 0;				//关中断等显示完后再开中断 
	}
}
void Decode(unsigned char ScanCode) //注意:如SHIFT+G为12H 34H F0H 34H F0H 12H，也就是说shift的通码+G的通码+shift的断码+G的断码
{
	unsigned char TempCyc;

	if(!Key_UP) {			//当键盘松开时
		switch(ScanCode) {
			case 0xF0 :		//当收到0xF0，Key_UP置1表示断码开始
				Key_UP = 1;
				break;
			case 0x12:		// 左 SHIFT
				Shift = 1;
				break;
			case 0x59:		// 右 SHIFT
				Shift = 1;
				break;
			default:
				if(DisNum > 15) {
					DisplayListChar(0,1,Cls);	//清LCD第二行
					DisNum = 0;
				}
				if(Shift == 1) {				//如果按下SHIFT
					for(TempCyc = 0;(Shifted[TempCyc][0]!=ScanCode)&&(TempCyc<59); TempCyc++); //查表显示
					if(Shifted[TempCyc][0] == ScanCode) {
						DisplayOneChar(DisNum,1,Shifted[TempCyc][1]);
					}
					DisNum++;
				} 
				else {							//没有按下SHIFT
					for(TempCyc = 0; (UnShifted[TempCyc][0]!=ScanCode)&&(TempCyc<59);TempCyc++); //查表显示
					if(UnShifted[TempCyc][0] == ScanCode) {
						DisplayOneChar(DisNum,1,UnShifted[TempCyc][1]);
					}
					DisNum++;
				}
				break;
		}
	}
	else {
		Key_UP = 0;
		switch(ScanCode) {	//当键松开时不处理判码，如G 34H F0H 34H 那么第二个34H不会被处理
			case 0x12:		// 左 SHIFT
				Shift = 0;
				break;
			case 0x59:		// 右 SHIFT
				Shift = 0;
				break;
			default:
				break;
		}
	}
	BF = 0;					//标识字符处理完了
}