key_ps2.rar_C8051F330 key_单片机ps2通信

//================================================================== // 文件名称: main.c // 版 本: 1.01.01 // 日 期: 2013708 // 注 释: C8051F330,自定义PS2小键盘 // // // I/O定义： // ioKEYCOL = P0.0~P0.3; 键盘扫描列输入 // ioKEYROW = P1.0~P1.5 键盘扫描列行输出 // ioKEYCLK = P0^4; PS2键盘时钟信号 // ioKEYDATA = P0^5; PS2键盘数据信号 // 定时器的分配： // 定时器1：配置方式1。定时频率系统时钟/4。 // 功能说明： // 一． 扫描自定义键盘 // 二． 输出PS2信号 // //================================================================== #include "c8051f330.h" #include "define.h" //#include <intrins.h> #include "system.h" #include <intrins.h> bit b30MS; // 30毫秒标志 bit bPS2END; // PS2波形输出完成标志 bit bPS2FLAG; // 有键盘数据要输出 unsigned char cPS2STEP; // PS2波形输出步长 unsigned char cPS2Data; // PS2波形输出数据 unsigned char cPS2Data0; // PS2波形输出数据 unsigned char cPS2Data1; // PS2波形输出数据 unsigned char cPS2Data2; // PS2波形输出数据 unsigned char cKeybuf0; // 扫描的键值 unsigned char cKeybuf1; // 扫描的键值 unsigned char cKeybuf2; // 扫描的键值 unsigned char code key_col[] = // 键盘扫描 { 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0xf, 0x3, 0xf, 0xf, 0xf, 0x2, 0xf, 0x1, 0x0, 0xf, }; /* unsigned char code key_Map1[] = { 0x00,0x2E, 0x00,0x25, 0xE0,0x69, 0x00,0x36, 0x00,0x1E, 0x00,0x16, 0x00,0x09, 0x00,0x26, 0x00,0x79, 0x00,0x45, 0xE0,0x7A, 0x00,0x7B, 0x00,0x3E, 0x00,0x3D, 0xE0,0x7D, 0x00,0x46, 0xE0,0x72, 0xE0,0x6B, 0x00,0x5A, 0xE0,0x74, 0xE0,0x75, 0x00,0x66, 0x00,0x76, 0x00,0x0D, }; unsigned char code keyThreeByte_Map[] = { 0x00,0xF0,0x2E, 0x00,0xF0,0x25, 0xE0,0xF0,0x69, 0x00,0xF0,0x36, 0x00,0xF0,0x1E, 0x00,0xF0,0x16, 0x00,0xF0,0x09, 0x00,0xF0,0x26, 0x00,0xF0,0x79, 0x00,0xF0,0x45, 0xE0,0xF0,0x7A, 0x00,0xF0,0x7B, 0x00,0xF0,0x3E, 0x00,0xF0,0x3D, 0xE0,0xF0,0x7D, 0x00,0xF0,0x46, 0xE0,0xF0,0x72, 0xE0,0xF0,0x6B, 0x00,0xF0,0x5A, 0xE0,0xF0,0x74, 0xE0,0xF0,0x75, 0x00,0xF0,0x66, 0x00,0xF0,0x76, 0x00,0xF0,0x0D, }; */ unsigned char code key_Map1[] = { 0x00,0x16, 0x00,0x1E, 0x00,0x26, 0x00,0x09, 0x00,0x25, 0x00,0x2E, 0x00,0x36, 0xE0,0x69, 0x00,0x3D, 0x00,0x3E, 0x00,0x46, 0xE0,0x7D, 0x00,0x45, 0x00,0x79, 0x00,0x7B, 0xE0,0x7A, 0x00,0x66, 0xE0,0x75, 0x00,0x0D, 0x00,0x76, 0xE0,0x6B, 0xE0,0x72, 0xE0,0x74, 0x00,0x5A, }; unsigned char code keyThreeByte_Map[] = { 0x00,0xF0,0x16, 0x00,0xF0,0x1E, 0x00,0xF0,0x26, 0x00,0xF0,0x09, 0x00,0xF0,0x25, 0x00,0xF0,0x2E, 0x00,0xF0,0x36, 0xE0,0xF0,0x69, 0x00,0xF0,0x3D, 0x00,0xF0,0x3E, 0x00,0xF0,0x46, 0xE0,0xF0,0x7D, 0x00,0xF0,0x45, 0x00,0xF0,0x79, 0x00,0xF0,0x7B, 0xE0,0xF0,0x7A, 0x00,0xF0,0x66, 0xE0,0xF0,0x75, 0x00,0xF0,0x0D, 0x00,0xF0,0x76, 0xE0,0xF0,0x6B, 0xE0,0xF0,0x72, 0xE0,0xF0,0x74, 0x00,0xF0,0x5A, }; //================================================================== // 函数名称: void main(void) // 函数用途: 主程序 // 输入参数: // 输出参数: // 注 释: //================================================================== void main(void) { PCA0MD &= ~0x40; // 禁止看门狗定时器 Sysclk_Init(); // 配置系统时钟 SysTimer_Init(); // 定时器初始化 SysPort_Init(); // 端口配置 EA = 1; b30MS = 1; // 打开全局中断 bPS2FLAG = 0; cPS2Data0 =0; cPS2Data1 =0; cPS2Data2 =0; while(1) { // SysDelay_50us(); // bval = ioKEYDATA; // ioKEYDATA = ~bval; // ioKEYCLK = bval; // 进入低功耗 PCON |= 0x01; // 空闲方式 PCON = PCON; } } void INT0_ISR(void) interrupt 0 { } void Timer0_ISR(void) interrupt 1 { } void INT1_ISR(void) interrupt 2 { } void keyscan(void) { unsigned char cROW,cCOL,tmp1,tmp2,tmp3,i; P1 = (P1 & 0xc0); for (i=10;i>0;i--) tmp2 = P0 & 0x0f; P1 = (P1 & 0xc0) | 0x3f; for (i=10;i>0;i--) if(tmp2 == 0x0f) { cKeybuf2 = cKeybuf1; cKeybuf1 = cKeybuf0; cKeybuf0 = 0; } else { tmp1 = 0x3e; //tem1 用来设置P1口的输出 cROW = 0; for (tmp3=0;tmp3<6;tmp3++) //row check { P1 = (P1 & 0xc0) | tmp1; //使P1.0~p1.5中有一个为0 for (i=10;i>0;i--) tmp2 = P0 & 0x0f; if(tmp2 != 0x0f) { cCOL = key_col[tmp2]; cKeybuf2 = cKeybuf1; cKeybuf1 = cKeybuf0; cKeybuf0 = (cROW << 2) + cCOL + 1; return; } tmp1 = ((tmp1<<1) +1) & 0x3f; cROW ++; } } } void keydata(void) { if((cPS2Data0 !=0) || (cPS2Data1 !=0) || (cPS2Data2 !=0)) { bPS2FLAG =1; return; } if(cKeybuf0 == cKeybuf1) { if(cKeybuf1 != cKeybuf2) { if(cKeybuf0 != 0) { bPS2FLAG =1; cPS2Data0 = key_Map1[cKeybuf0 + cKeybuf0 -1]; cPS2Data1 = key_Map1[cKeybuf0 + cKeybuf0 -2]; } else { bPS2FLAG = 1; cPS2Data0 = keyThreeByte_Map[cKeybuf0 + cKeybuf0 + cKeybuf0 -1]; cPS2Data1 = keyThreeByte_Map[cKeybuf0 + cKeybuf0 + cKeybuf0 -2]; cPS2Data2 = keyThreeByte_Map[cKeybuf0 + cKeybuf0 + cKeybuf0 -3]; } } else { // if(cKeybuf0 == 0) return; // bPS2FLAG =1; // cPS2Data0 = key_Map1[cKeybuf0 + cKeybuf0 -1]; // cPS2Data1 = key_Map1[cKeybuf0 + cKeybuf0 -2]; } } } void TIMER1_ISR(void) interrupt 3 using 2 { unsigned char temp_bit; bit flag_check=1; if(b30MS) { //设置定时器30ms中断 TH1 = def30msdelay >> 8; TL1 = def30msdelay; //扫描键盘 // P0=~P0; keyscan(); keydata(); if(bPS2FLAG) { cPS2STEP = 0; bPS2FLAG =0; b30MS = 0; bPS2END = 0; if(cPS2Data2 != 0) { cPS2Data = cPS2Data2; cPS2Data2 = 0; } else if(cPS2Data1 != 0) { cPS2Data = cPS2Data1; cPS2Data1 = 0; } else if(cPS2Data0 != 0) { cPS2Data = cPS2Data0; cPS2Data0 = 0; } //设置定时器33us(30KHz)中断 TH1 = def33usdelay >> 8; TL1 = def33usdelay; } /* else { //设置定时器30ms中断 TH1 = def30msdelay >> 8; TL1 = def30msdelay; } */ } else { TH1 = def33usdelay >> 8; // TL1 = def33usdelay; //输出PS2键盘值 if(bPS2END) { //设置定时器30ms中断 TH1 = def30msdelay >> 8; TL1 = def30msdelay; b30MS = 1; ioKEYCLK = 1; //PS2键盘时钟信号 ioKEYDATA = 1; //PS2键盘数据信号 } else { switch(cPS2STEP) { case 0: ioKEYDATA = 0; break; case 1: //s case 3: //0 case 5: //1 case 7: //2 case 9: //3 case 11: //4 case 13: //5 case 15: //6 case 17: //7 case 19: // po case 21: // stop ioKEYCLK = 0; break; case 2: case 4: case 6: case 8: case 10: case 12: case 14: case 16: ioKEYCLK = 1; //PS2键盘时钟信号 temp_bit = cPS2Data & 0x01; ioKEYDATA = temp_bit; //PS2键盘数据信号 if(temp_bit==0x01) { flag_check=!flag_check; } cPS2Data=cPS2Data >> 1; break; case 18: ioKEYCLK =1; ioKEYDATA = flag_check; //奇偶校验位 break; case 20: ioKEYCLK =1; ioKEYDATA = 1; // stop break; case 22: ioKEYCLK = 1; bPS2END = 1; // #pragma ASM // LJMP 0x00000000; // #pragma ENDASM break; } cPS2STEP++; if(cPS2STEP>22) { TH1 = def30msdelay >> 8; TL1 = def30msdelay; ioKEYCLK = 1; //PS2键盘�