51系列单片机高级实例开发指南代码

#include "keyboard.h" void kbbufadd(unsigned char dat) { unsigned char i; for (i=0;i<BUFLEN;i++) { if (kbbuf[i]==dat) { return; } } for (i=0;i<BUFLEN;i++) { if (kbbuf[i]==0) { kbbuf[i] = dat; break; } } } void kbbufdel(unsigned char dat) { unsigned char i, c, c0 = 0, t; bit f = 0; for (i=0;i<BUFLEN;i++) { if (kbbuf[i] == dat) { t = i; kbbuf[i] = 0; f = 1; } } if (f == 0) { for (i=0;i<BUFLEN;i++) { kbbuf[i] = 0; } } } void kbReply(void) { unsigned char i, j, t, mod; j = 2; mod = 0; for (i=0;i<6;i++) { ReplyBuffer[i+2] = 0; t = kbdecode(kbbuf[i]); if (t != 0) { s0 = 0; switch (t) { case 0xe0: s0b0 = 1; break; case 0xe1: s0b1 = 1; break; case 0xe2: s0b2 = 1; break; case 0xe3: s0b3 = 1; break; case 0xe4: s0b4 = 1; break; case 0xe5: s0b5 = 1; break; case 0xe6: s0b6 = 1; break; case 0xe7: s0b7 = 1; break; default: ; } if (s0 == 0) ReplyBuffer[j++] = t; mod |= s0; } } ReplyCount = 8; ReplyBuffer[0] = mod; ReplyBuffer[1] = 0; } void kbScan(void) { bit p; p = ps2read(); while (ps2test(p) == 0) { ps2write(0xfe); p = ps2read(); } Output(PS2_BYTE); if (PS2_Ready == 1) { if (PS2_BYTE != 0xf0) { kbbufadd(PS2_BYTE); } else { do { p = ps2read(); while (ps2test(p) == 0) { ps2write(0xfe); p = ps2read(); } Output(PS2_BYTE); } while (PS2_Ready == 0); kbbufdel(PS2_BYTE); } kbReply(); //write keyboard buffer to reply buffer // IsListening = 0; d12comm(0x03); SendReplyBuffer(); } } unsigned char kbdecode(unsigned char dat) { unsigned char usage; switch (dat) { case 0x1c: usage = 0x04; break; case 0x32: usage = 0x05; break; case 0x21: usage = 0x06; break; case 0x23: usage = 0x07; break; case 0x24: usage = 0x08; break; case 0x2b: usage = 0x09; break; case 0x34: usage = 0x0a; break; case 0x33: usage = 0x0b; break; case 0x43: usage = 0x0c; break; case 0x3b: usage = 0x0d; break; case 0x42: usage = 0x0e; break; case 0x4b: usage = 0x0f; break; case 0x3a: usage = 0x10; break; case 0x31: usage = 0x11; break; case 0x44: usage = 0x12; break; case 0x4d: usage = 0x13; break; case 0x15: usage = 0x14; break; case 0x2d: usage = 0x15; break; case 0x1b: usage = 0x16; break; case 0x2c: usage = 0x17; break; case 0x3c: usage = 0x18; break; case 0x2a: usage = 0x19; break; case 0x1d: usage = 0x1a; break; case 0x22: usage = 0x1b; break; case 0x35: usage = 0x1c; break; case 0x1a: usage = 0x1d; break; case 0x16: usage = 0x1e; break; case 0x1e: usage = 0x1f; break; case 0x26: usage = 0x20; break; case 0x25: usage = 0x21; break; case 0x2e: usage = 0x22; break; case 0x36: usage = 0x23; break; case 0x3d: usage = 0x24; break; case 0x3e: usage = 0x25; break; case 0x46: usage = 0x26; break; case 0x45: usage = 0x27; break; case 0x5a: usage = 0x28; break; case 0x76: usage = 0x29; break; case 0x66: usage = 0x2a; break; case 0x0d: usage = 0x2b; break; case 0x29: usage = 0x2c; break; case 0x4e: usage = 0x2d; break; case 0x55: usage = 0x2e; break; case 0x54: usage = 0x2f; break; case 0x5b: usage = 0x30; break; case 0x5d: usage = 0x31; break; case 0x4c: usage = 0x33; break; case 0x52: usage = 0x34; break; case 0x41: usage = 0x36; break; case 0x49: usage = 0x37; break; case 0x4a: usage = 0x38; break; case 0x58: usage = 0x39; break; case 0x05: usage = 0x3a; break; case 0x06: usage = 0x3b; break; case 0x04: usage = 0x3c; break; case 0x0c: usage = 0x3d; break; case 0x03: usage = 0x3e; break; case 0x0b: usage = 0x3f; break; case 0x83: usage = 0x40; break; case 0x0a: usage = 0x41; break; case 0x01: usage = 0x42; break; case 0x09: usage = 0x43; break; case 0x78: usage = 0x44; break; case 0x07: usage = 0x45; break; // case 0x57: //PrintScreen // usage = 0x46; // break; case 0x7e: usage = 0x47; break; // case 0x62: //Break // usage = 0x48; // break; case 0x70: usage = 0x49; break; case 0x6c: usage = 0x4a; break; case 0x7d: usage = 0x4b; break; case 0x71: usage = 0x4c; break; case 0x69: usage = 0x4d; break; case 0x7a: usage = 0x4e; break; case 0x74: usage = 0x4f; break; case 0x6b: usage = 0x50; break; case 0x72: usage = 0x51; break; case 0x75: usage = 0x52; break; case 0x77: usage = 0x53; break; // case 0x4a: // usage = 0x54; // break; case 0x7c: usage = 0x55; break; case 0x7b: usage = 0x56; break; case 0x79: usage = 0x57; break; // case 0x5a: //Keypad ENTER // usage = 0x58; // break; // case 0x69: //Keypad 1 // usage = 0x59; // break; // case 0x72: //Keypad 2 // usage = 0x5a; // break; // case 0x7a: //Keypad 3 // usage = 0x5b; // break; // case 0x6b: // usage = 0x5c; // break; // case 0x73: // usage = 0x5d; // break; // case 0x74: // usage = 0x5e; // break; // case 0x6c: // usage = 0x5f; // break; // case 0x75: // usage = 0x60; // break; // case 0x7d: // usage = 0x61; // break; // case 0x70: // usage = 0x62; // break; // case 0x71: // usage = 0x63; // break; case 0x2f: usage = 0x76; break; case 0x14: usage = 0xe0; break; case 0x12: usage = 0xe1; break; case 0x11: usage = 0xe2; break; case 0x1f: usage = 0xe3; break; // case 0x14: //Right Ctrl // usage = 0xe4; // break; case 0x59: usage = 0xe5; break; // case 0x11: //Right ALT // usage = 0xe6; // break; case 0x27: usage = 0xe7; break; default: usage = 0; } return usage; }