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前几天在淘宝上买了一个frid的板子，然后就只有一个用户手册，在手册上发现一家公司，去主页找到了一份与51的代码，如下，然后就是我在串口发命令可以吧买的电子标签的UID读出来，可是在程序中就是读不到，求大神帮忙分析一下程序：
//////////////////////////////////////////////////////////// //Test SL025x //MCS51 source code //////////////////////////////////////////////////////////// #include #include #define true 1 #define false 0 //#define OSC_FREQ 22118400L #define OSC_FREQ 13560000L #define tiME0_10ms 65536L - OSC_FREQ/1200L #define BOUND4800 256 - 24 #define BOUND9600 256 - 12 #define BOUND14400 256 - 8 #define BOUND19200 256 - 6 #define BOUND28800 256 - 4 #define BOUND38400 256 - 3 #define BOUND57600 256 - 2 #define BOUND115200 256 - 1 //IO definition ***it CARDIN = P1^0; ***it led =P1^1; void InitializeSystem(); void SendCom(unsigned char *g_cCommand); void StartTime(unsigned int _MS); void StopTime(); char ReadWriteUltralight(void); char ReadWriteMifareStd(void); //Command List, preamble + length + command code + data frame unsigned char code SelectCard[4] = {0xBA,0x02,0x01,0xB9}; unsigned char code LoginSector0[11] = {0xBA,0x0A,0x02,0x00,0xAA,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}; unsigned char code LoginSector1[11] = {0xBA,0x0A,0x02,0x01,0xAA,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}; unsigned char code ReadBlock1[4] = {0xBA,0x03,0x03,0x01}; unsigned char code WriteBlock1[20] = {0xBA,0x13,0x04,0x01,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF}; unsigned char code ReadValue[4] = {0xBA,0x03,0x05,0x05}; unsigned char code InitializeValue[8] ={0xBA,0x07,0x06,0x04,0x00,0x00,0x00,0x01}; unsigned char code IncrementValue[8] = {0xBA,0x07,0x08,0x04,0x00,0x00,0x00,0x20}; unsigned char code DecrementValue[8] = {0xBA,0x07,0x09,0x04,0x03,0x00,0x00,0x00}; unsigned char code CopyValue[5] = {0xBA,0x04,0x0A,0x04,0x05}; unsigned char code ReadULPage5[4] = {0xBA,0x03,0x10,0x05}; unsigned char code WriteULPage5[8] = {0xBA,0x07,0x11,0x05,0x11,0x22,0x33,0x44}; unsigned char code TurnOnRedLed[4] = {0xBA,0x03,0x40,0x01}; unsigned char code TurnOffRedLed[4] = {0xBA,0x03,0x40,0x00}; unsigned char g_ucReceBuf[21]; unsigned char g_ucReceNum; unsigned char g_ucWatchTime; unsigned char g_ucCardType; char g_cStatus; char g_cErr; bit g_bReceOver; bit g_bReceReady; bit g_bTimeOut; void main() { InitializeSystem(); while(1) { while (!CARDIN) { g_cErr = 0; //Get the unique serial number of Mifare Card SendCom(SelectCard); // StartTime(8); //waitting until receive response from SL013 or over 80ms while (!g_bReceOver && !g_bTimeOut); // StopTime(); // if ((g_ucReceBuf[2]!=0x01) || (g_ucReceBuf[3]!=0) || g_bTimeOut) { led = 0;continue; } if (g_ucReceBuf[1] == 8) { g_ucCardType = g_ucReceBuf[8]; // if(g_ucReceBuf[9]==0x11) // { // // } } else { g_ucCardType = g_ucReceBuf[11]; } switch(g_ucCardType) { case 1://Mifare 1k 4 byte UID case 2://Mifare 1k 7 byte UID g_cStatus = ReadWriteMifareStd( ); if (g_cStatus != true) { g_cErr = 3; } break; case 3://Mifare_UltraLight g_cStatus = ReadWriteUltralight( ); if (g_cStatus != true) { g_cErr = 3; } break; case 4://Mifare 4k 4 byte UID case 5://Mifare 4k 7 byte UID g_cStatus = ReadWriteMifareStd( ); if (g_cStatus != true) { g_cErr = 3; } break; case 6://Mifare_DesFire g_cErr = 4; break; default: g_cErr = 3; break; } //Glare Red_Led to indicate working ok if (g_cErr == 0) { SendCom(TurnOnRedLed); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); StartTime(20); while (!g_bTimeOut); StopTime(); SendCom(TurnOffRedLed); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); } } } } //////////////////////////////////////////////////////////// char ReadWriteUltralight(void) { //Write data to page5 of UltraLight SendCom(WriteULPage5); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x11) || (g_ucReceBuf[3]!=0) || g_bTimeOut) { return false; } //read data from page5 of UltraLight SendCom(ReadULPage5); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x10) || (g_ucReceBuf[3]!=0) || g_bTimeOut) { return false; } //Compare read data with written data if (memcmp(&WriteULPage5[4], &g_ucReceBuf[4], 4) != 0 ) { return false; } else { return true; } } //////////////////////////////////////////////////////////// char ReadWriteMifareStd(void) { long lPurseValue; //Verify password of sector0 SendCom(LoginSector0); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x02) || (g_ucReceBuf[3]!=2) || g_bTimeOut) { return false; } //Write data to block1 SendCom(WriteBlock1); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x04) || (g_ucReceBuf[3]!=0) || g_bTimeOut) { return false; } if (memcmp(&WriteBlock1[4], &g_ucReceBuf[4], 16) != 0) { return false; } //Read data from block1 SendCom(ReadBlock1); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x03) ||(g_ucReceBuf[3]!=0) || g_bTimeOut) { return false; } //Compare read data with written data if (memcmp(&WriteBlock1[4], &g_ucReceBuf[4], 16) != 0) { return false; } //Verify password of sector1 SendCom(LoginSector1); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x02) || (g_ucReceBuf[3]!=2) || g_bTimeOut) { return false; } //Initialize block4 to one purse, and value = 0x01000000 SendCom(InitializeValue); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x06) || (g_ucReceBuf[3]!=0) || g_bTimeOut) { return false; } if (memcmp(&InitializeValue[4], &g_ucReceBuf[4], 4) != 0) { return false; } //Increment SendCom(IncrementValue); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x08) || (g_ucReceBuf[3]!=0) || g_bTimeOut) { return false; } //Decrement SendCom(DecrementValue); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x09) || (g_ucReceBuf[3]!=0) || g_bTimeOut) { return false; } //Backup purse to blcok5 SendCom(CopyValue); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x0A) || (g_ucReceBuf[3]!=0) || g_bTimeOut) { return false; } //Read purse value from blcok5 SendCom(ReadValue); StartTime(8); while (!g_bReceOver && !g_bTimeOut); StopTime(); if ((g_ucReceBuf[2]!=0x05) || (g_ucReceBuf[3]!=0) || g_bTimeOut) { return false; } //Check value lPurseValue = g_ucReceBuf[7]*0x1000000 + g_ucReceBuf[6]*0x10000 + g_ucReceBuf[5]*0x100 + g_ucReceBuf[4]; if (lPurseValue != 0x01000000 + 0x20000000 - 0x00000003) { return false; } else { return true; } } //////////////////////////////////////////////////////////// void InitializeSystem() { TMOD &= 0x0F; TMOD |= 0x21; PCON |= 0x80; SCON = 0x50; TH1 = TL1 = BOUND115200; g_ucReceNum = 0; g_bReceOver = 0; g_bReceReady = 0; TR1 = 1; IE |= 0x90; } //////////////////////////////////////////////////////////// void StartTime(unsigned int _MS) { TH0 = (unsigned char)((TIME0_10ms>>8)&0xFF); TL0 = (unsigned char)(TIME0_10ms&0xFF); g_ucWatchTime = _MS; g_bTimeOut = 0; ET0 = 1; TR0 = 1; } //////////////////////////////////////////////////////////// time0_int () interrupt 1 using 1 { TH0 = (unsigned char)((TIME0_10ms>>8) & 0xFF); TL0 = (unsigned char)(TIME0_10ms & 0xFF); if (g_ucWatchTime--==0) { g_bTimeOut = 1; } } //////////////////////////////////////////////////////////// void StopTime() { ET0 = 0; TR0 = 0; } //////////////////////////////////////////////////////////// //Send command to SL025 //////////////////////////////////////////////////////////// void SendCom(unsigned char *g_cCommand) { unsigned char i,chkdata,sendleg; ES = 0; sendleg = *(g_cCommand+1) + 1; chkdata = 0; for(i=0; i chkdata ^= *(g_cCommand+i); TI = 0; SBUF = *(g_cCommand+i); while(!TI); } TI = 0; SBUF = chkdata; while (!TI); TI = 0; g_bReceReady = 1; g_bReceOver = 0; ES = 1; } ///////////////////////////////////////////////////////////////////// //Get result from SL025 ///////////////////////////////////////////////////////////////////// seri_int () interrupt 4 using 1 { unsigned char i,j; unsigned char rece_data = SBUF; unsigned char verify = 0; if(RI) { RI = 0; if (g_bReceReady) { switch (rece_data) { case 0xBD: g_bReceReady = 0; g_bReceOver = 0; g_ucReceNum = 0; g_ucReceBuf[0] = 0xBD; g_ucReceBuf[1] = 0; break; default: g_ucReceNum++; break; } } else { i = ++g_ucReceNum; g_ucReceBuf[i] = rece_data; if (g_ucReceBuf[1] == g_ucReceNum - 1) { for (j=0; j g_bReceOver = 1; ES = 0; } if (g_ucReceNum > sizeof(g_ucReceBuf)) { g_bReceOver = 0; g_ucReceNum = 0; } } } if(TI) { TI = 0; } } 发命令 是BA 02 01 B9，B9是前几位的异或值，回应应该为BD+08+01+00+uid+01+(前几位异或值) 
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请问怎么用读出卡号呢
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