基于51的PS2鼠标检测实验

#include <reg52.H> #include <intrins.H> #include <head.h> #define uchar unsigned char #define uint unsigned int #define LCD_DATA P2 //数据口 sbit RS = P1^5; //并行的指令/数据选择信号, H数据, L命令 sbit RW = P1^7; //并行读写选择信号, H读, L写 sbit E = P1^6; //并行使能端, H有效, L无效 sbit PSB = P1^1; //并/串接口选择, H并,L串 sbit RET = P1^4; //复位, L有效 sbit DATA=P0^2; sbit CLK=P3^2; uchar count,ASCII=65,Data1,Data2,Data3; uchar left=0,right=0,byte=0; uchar l_press=0,r_press=0,l_press0=0,r_press0=0; //后两个变量时表示哦前一时刻的按键情况000000000 int X,Y,XJ,YJ; uchar code datas1[] = {"PS2 鼠标检测实验"}; uchar code datas2[] = {"坐标情况："}; uchar code datas3[] = {"x:"}; uchar code datas4[] = {"y:"}; uchar code datas5[] = {"L:"}; uchar code datas6[] = {"R:"}; uchar code datas7[] = {"按键："}; void trains(char Code); void send(uchar Data); //延时约2us //检测LCD是否处于忙状态, 若忙返回1, 空闲返回0 bit checkBusy() { bit busy; RS = 0; RW = 1; E = 1; delayUs(); busy = (bit)(LCD_DATA&0x80); E = 0; return busy; } //等待LCD到空闲 void wait() { while(checkBusy()); } //写命令 void writeCmd(uchar cmd) { wait(); RS = 0; RW = 0; E = 0; delayUs(); LCD_DATA = cmd; delayUs(); E = 1; delayUs(); E = 0; } //写数据 void writeData(uchar dat) { wait(); RS = 1; RW = 0; E = 0; delayUs(); LCD_DATA = dat; delayUs(); E = 1; delayUs(); E = 0; } //初始化LCD void init() { PSB = 1; //并口方式 writeCmd(0x30); //基本指令, 扩充指令为34H delayMs(10); writeCmd(0x0c); //显示开, 关光标 writeCmd(0x01); //清屏 delayMs(10); } void setPosition(uchar x, uchar y) { uchar p; switch(x%4) { case 0: p = 0x80; break; //第一行开始地址 case 1: p = 0x90; break; //第二行 case 2: p = 0x88; break; //第三行 case 3: p = 0x98; break; //第四行 } p += y; writeCmd(p); } void writeString(uchar * str) { uchar i = 0; while(str[i] != '\0') { writeData(str[i++]); } } void DisplayGraphic(unsigned char code *adder) { int i,j; //*******显示上半屏内容设置 for(i=0;i<32;i++) // { writeCmd(0x80 + i); //SET 垂直地址 VERTICAL ADD writeCmd(0x80); //SET 水平地址 HORIZONTAL ADD for(j=0;j<16;j++) { writeData(*adder); adder++; } } //*******显示下半屏内容设置 for(i=0;i<32;i++) // { writeCmd(0x80 + i); //SET 垂直地址 VERTICAL ADD writeCmd(0x88); //SET 水平地址 HORIZONTAL ADD for(j=0;j<16;j++) { writeData(0xff); adder++; } } } void initkb() //键盘初始化函数 { EA=1;//� EX0=1; IT0=1; count=0; } void exter0() interrupt 0 { count++; if(count>=2 && count<=9) { Data1=(Data1>>1); if(DATA==1) Data1|=0x80; } if(count>=13 && count<=20) { Data2=(Data2>>1); if(DATA==1) Data2|=0x80; } if(count>=24 && count<=31) { Data3=(Data3>>1); if(DATA==1) Data3|=0x80; } } void trains1(char scancode) { l_press0=l_press; r_press0=r_press; if(scancode & 0x01) l_press=1; else l_press=0; if(scancode & 0x02) r_press=1; else r_press=0; if(l_press0==0 && l_press==1) {left++;} if(r_press0==0 && r_press==1) {right++;} } void trains2(char scancode) { X=X+scancode; } void trains3(char scancode) { Y=Y+scancode; } void main() { init(); initkb(); delayMs(100); //开始显示各种00000 setPosition(0, 0); writeString(datas1); setPosition(1, 0); writeString(datas2); setPosition(2, 0); writeString(datas3); setPosition(2, 4); writeString(datas4); setPosition(3, 0); writeString(datas7); setPosition(3, 4); writeString(datas5); setPosition(3, 6); writeString(datas6); send(0xF4);//使能命令的发送000000000 delayMs(200); count=0; while(1) { if(count==33) { count=0; trains1(Data1); trains2(Data2); trains3(Data3); } if(count>33) //纠错机制00000000 { EX0=0; delayMs(2); count=0; EX0=1; } if(count==0) { setPosition(2, 1); if(X>=0) { writeData('+'); XJ=X; } else {writeData('-');XJ=-X;} writeData(XJ/10000+48); writeData((XJ%10000)/1000+48); writeData((XJ%1000)/100+48); writeData((XJ%100)/10+48); writeData(XJ%10+48); setPosition(2, 5); if(Y>=0) { writeData('+'); YJ=Y; } else {writeData('-');YJ=-Y;} writeData(YJ/10000+48); writeData((YJ%10000)/1000+48); writeData((YJ%1000)/100+48); writeData((YJ%100)/10+48); writeData(YJ%10+48); setPosition(3, 5); writeData(left/10+48); writeData(left%10+48); setPosition(3, 7); writeData(right/10+48); writeData(right%10+48); } } } void send(uchar Data) { uchar i,high=0; EX0=0; CLK=0; delay10us(12); DATA=0; delay10us(2); CLK=1; while(CLK==1); //开始发送八位数据 for(i=0;i<=7;i++) { if(Data & 0x01) { DATA=1; high++; } else {DATA=0;} Data=(Data>>1); while(CLK==0); while(CLK==1); } if((high%2)==0) DATA=1; else DATA=0; while(CLK==0); while(CLK==1); DATA=1; while(DATA==1); while(CLK==1); while(CLK==0); EX0=1;//写数据程序结束后开中断 }