📄 rc500.lst
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945 1 return MI_OK;
946 1 }
947
948 ///////////////////////////////////////////////////////////////////////
949 // W R I T E R E G I S T E R
950 ///////////////////////////////////////////////////////////////////////
951 char M500PcdWriteRegister(unsigned char Reg, unsigned char value)
952 {
953 1 WriteIO(Reg,value);
954 1 TOGGLE_WD();
955 1 return MI_OK;
956 1 }
957
958 ///////////////////////////////////////////////////////////////////////
959 // R E A D R E G I S T E R
960 ///////////////////////////////////////////////////////////////////////
961 char M500PcdReadRegister(unsigned char Reg)
962 {
963 1 char value;
964 1 TOGGLE_WD();
965 1 value = ReadIO(Reg);
966 1 return (value);
967 1 }
968
969 ///////////////////////////////////////////////////////////////////////
970 // M I F A R E R E Q U E S T
971 ///////////////////////////////////////////////////////////////////////
972 char M500PiccRequest(unsigned char req_code, // request code ALL = 0x52
973 // or IDLE = 0x26
974 unsigned char *atq) // answer to request
975 {
976 1 return M500PiccCommonRequest(req_code,atq);
977 1 }
978
979 ///////////////////////////////////////////////////////////////////////
980 // M I F A R E C O M M O N R E Q U E S T
981 ///////////////////////////////////////////////////////////////////////
982 char M500PiccCommonRequest(unsigned char req_code,
983 unsigned char *atq)
984 {
C51 COMPILER V7.20 RC500 02/04/2007 10:44:17 PAGE 17
985 1 char idata status = MI_OK;
986 1 TOGGLE_WD();
987 1 //************* initialize ******************************
988 1 WriteIO(RegChannelRedundancy,0x03); // RxCRC and TxCRC disable, parity enable
989 1 ClearBitMask(RegControl,0x08); // disable crypto 1 unit
990 1 WriteIO(RegBitFraming,0x07); // set TxLastBits to 7
991 1 SetBitMask(RegTxControl,0x03); // Tx2RF-En, Tx1RF-En enable
992 1
993 1 ResetInfo(MInfo);
994 1 MSndBuffer[0] = req_code;
995 1 MInfo.nBytesToSend = 1;
996 1 status = M500PcdCmd(PCD_TRANSCEIVE,
997 1 MSndBuffer,
998 1 MRcvBuffer,
999 1 &MInfo);
1000 1
1001 1 if (status) // error occured
1002 1 {
1003 2 *atq = 0;
1004 2 }
1005 1 else
1006 1 {
1007 2 if (MInfo.nBitsReceived != 16) // 2 bytes expected
1008 2 {
1009 3 *atq = 0;
1010 3 status = MI_BITCOUNTERR;
1011 3 }
1012 2 else
1013 2 {
1014 3 status = MI_OK;
1015 3 memcpy(atq,MRcvBuffer,2);
1016 3 }
1017 2 }
1018 1 TOGGLE_WD();
1019 1 return status;
1020 1 }
1021
1022 ///////////////////////////////////////////////////////////////////////
1023 // M I F A R E A N T I C O L L I S I O N
1024 // for standard select
1025 ///////////////////////////////////////////////////////////////////////
1026 char M500PiccAnticoll (unsigned char bcnt,
1027 unsigned char *snr)
1028 {
1029 1 return M500PiccCascAnticoll(0x93,bcnt,snr); // first cascade level
1030 1 }
1031
1032 ///////////////////////////////////////////////////////////////////////
1033 // M I F A R E A N T I C O L L I S I O N
1034 // for extended serial numbers
1035 ///////////////////////////////////////////////////////////////////////
1036 char M500PiccCascAnticoll (unsigned char select_code,
1037 unsigned char bcnt,
1038 unsigned char *snr)
1039 {
1040 1 char idata status = MI_OK;
1041 1 char idata snr_in[4]; // copy of the input parameter snr
1042 1 char idata nbytes = 0;
1043 1 char idata nbits = 0;
1044 1 char idata complete = 0;
1045 1 char idata i = 0;
1046 1 char idata byteOffset = 0;
C51 COMPILER V7.20 RC500 02/04/2007 10:44:17 PAGE 18
1047 1 unsigned char idata snr_crc;
1048 1 unsigned char idata snr_check;
1049 1 unsigned char dummyShift1; // dummy byte for snr shift
1050 1 unsigned char dummyShift2; // dummy byte for snr shift
1051 1 TOGGLE_WD();
1052 1 //************* Initialisation ******************************
1053 1 M500PcdSetTmo(106);
1054 1 memcpy(snr_in,snr,4);
1055 1
1056 1 WriteIO(RegDecoderControl,0x28); // ZeroAfterColl aktivieren
1057 1 ClearBitMask(RegControl,0x08); // disable crypto 1 unit
1058 1
1059 1 //************** Anticollision Loop ***************************
1060 1 complete = 0;
1061 1 // bcnt = 0; // no part of the snr is known
1062 1 while (!complete && (status == MI_OK) )
1063 1 { TOGGLE_WD();
1064 2 ResetInfo(MInfo);
1065 2 WriteIO(RegChannelRedundancy,0x03); // RxCRC and TxCRC disable, parity enable
1066 2 nbits = bcnt % 8; // remaining number of bits
1067 2 if (nbits)
1068 2 {
1069 3 WriteIO(RegBitFraming,nbits << 4 | nbits); // TxLastBits/RxAlign auf nb_bi
1070 3 nbytes = bcnt / 8 + 1;
1071 3 // number of bytes known
1072 3
1073 3 // in order to solve an inconsistancy in the anticollision sequence
1074 3 // (will be solved soon), the case of 7 bits has to be treated in a
1075 3 // separate way - please note the errata sheet
1076 3 if (nbits == 7)
1077 3 {
1078 4 MInfo.cmd = PICC_ANTICOLL1; // pass command flag to ISR
1079 4 WriteIO(RegBitFraming,nbits); // reset RxAlign to zero
1080 4 }
1081 3 }
1082 2 else
1083 2 {
1084 3 nbytes = bcnt / 8;
1085 3 }
1086 2
1087 2 MSndBuffer[0] = select_code;
1088 2 MSndBuffer[1] = 0x20 + ((bcnt/8) << 4) + nbits; //number of bytes send
1089 2
1090 2 for (i = 0; i < nbytes; i++) // Sende Buffer beschreiben
1091 2 {
1092 3 MSndBuffer[i + 2] = snr_in[i];
1093 3 }
1094 2 MInfo.nBytesToSend = 2 + nbytes;
1095 2
1096 2 status = M500PcdCmd(PCD_TRANSCEIVE,
1097 2 MSndBuffer,
1098 2 MRcvBuffer,
1099 2 &MInfo);
1100 2
1101 2
1102 2 // in order to solve an inconsistancy in the anticollision sequence
1103 2 // (will be solved soon), the case of 7 bits has to be treated in a
1104 2 // separate way
1105 2 if (nbits == 7)
1106 2 {
1107 3 // reorder received bits
1108 3 dummyShift1 = 0x00;
C51 COMPILER V7.20 RC500 02/04/2007 10:44:17 PAGE 19
1109 3 for (i = 0; i < MInfo.nBytesReceived; i++)
1110 3 {
1111 4 dummyShift2 = MRcvBuffer[i];
1112 4 MRcvBuffer[i] = (dummyShift1 >> (i+1)) | (MRcvBuffer[i] << (7-i));
1113 4 dummyShift1 = dummyShift2;
1114 4 }
1115 3 MInfo.nBitsReceived -= MInfo.nBytesReceived; // subtract received parity bits
1116 3 // recalculation of collision position
1117 3 if ( MInfo.collPos ) MInfo.collPos += 7 - (MInfo.collPos + 6) / 9;
1118 3 }
1119 2
1120 2 if ( status == MI_OK || status == MI_COLLERR) // no other occured
1121 2 {
1122 3 // R e s p o n s e P r o c e s s i n g
1123 3 if ( MInfo.nBitsReceived != (40 - bcnt) ) // not 5 bytes answered
1124 3 {
1125 4 status = MI_BITCOUNTERR; // Exit with error
1126 4 }
1127 3 else
1128 3 {
1129 4 byteOffset = 0;
1130 4 if( nbits != 0 ) // last byte was not complete
1131 4 {
1132 5 snr_in[nbytes - 1] = snr_in[nbytes - 1] | MRcvBuffer[0];
1133 5 byteOffset = 1;
1134 5 }
1135 4
1136 4 for ( i =0; i < (4 - nbytes); i++)
1137 4 {
1138 5 snr_in[nbytes + i] = MRcvBuffer[i + byteOffset];
1139 5 }
1140 4
1141 4 if (status != MI_COLLERR ) // no error and no collision
1142 4 {
1143 5 // SerCh check
1144 5 snr_crc = snr_in[0] ^ snr_in[1] ^ snr_in[2] ^ snr_in[3];
1145 5 snr_check = MRcvBuffer[MInfo.nBytesReceived - 1];
1146 5 if (snr_crc != snr_check)
1147 5 {
1148 6 status = MI_SERNRERR;
1149 6 }
1150 5 else
1151 5 {
1152 6 complete = 1;
1153 6 }
1154 5 }
1155 4 else // collision occured
1156 4 {
1157 5 bcnt = bcnt + MInfo.collPos - nbits;
1158 5 status = MI_OK;
1159 5 }
1160 4 }
1161 3 }
1162 2 }
1163 1 if (status == MI_OK)
1164 1 {
1165 2 // transfer snr_in to snr
1166 2 memcpy(snr,snr_in,4);
1167 2 }
1168 1 else
1169 1 {
1170 2 memcpy(snr,"0000",4);
C51 COMPILER V7.20 RC500 02/04/2007 10:44:17 PAGE 20
1171 2 }
1172 1
1173 1 //----------------------Einstellungen aus Initialisierung ruecksetzen
1174 1 ClearBitMask(RegDecoderControl,0x20); // ZeroAfterColl disable
1175 1 TOGGLE_WD();
1176 1 return status;
1177 1 }
1178
1179 ///////////////////////////////////////////////////////////////////////
1180 // M I F A R E S E L E C T
1181 // for ⌨️ 快捷键说明
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