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//地址：http://www.jdgcs.org/wiki/Downloads
#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1if(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1while (DData[ListLength]>0x19) {//若到达字串尾则退出if(X <= 0xF) {//X坐标应小于0xFDisplayOneChar(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 SHIFTShift = 1;break;case 0x59: // 右 SHIFTShift = 1;break;default:if(DisNum > 15) {DisplayListChar(0,1,Cls); //清LCD第二行DisNum = 0;}if(Shift == 1) { //如果按下SHIFTfor(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SHIFTfor(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 SHIFTShift = 0;break;case 0x59: // 右 SHIFTShift = 0;break;default:break;}}BF = 0; //标识字符处理完了
}
unsigned char code UnShifted[61][2] = {0x1C, 'a',0x32, 'b',0x21, 'c',0x23, 'd',0x24, 'e',0x2B, 'f',0x34, 'g',0x33, 'h',0x43, 'i',0x3B, 'j',0x42, 'k',0x4B, 'l',0x3A, 'm',0x31, 'n',0x44, 'o',0x4D, 'p',0x15, 'q',0x2D, 'r',0x1B, 's',0x2C, 't',0x3C, 'u',0x2A, 'v',0x1D, 'w',0x22, 'x',0x35, 'y',0x1A, 'z',0x45, '0',0x16, '1',0x1E, '2',0x26, '3',0x25, '4',0x2E, '5',0x36, '6',0x3D, '7',0x3E, '8',0x46, '9',0x0E, '`',0x4E, '-',0x55, '=',0x5D, '\\',0x29, ' ',0x54, '[',0x5B, ']',0x4C, ';',0x52, '\'
};转载地址：http://www.jdgcs.org/wiki/Downloads
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