-//-----------------------------------------------------------------------------\r
-// Routines to support ISO 15693. This includes both the reader software and\r
-// the `fake tag' modes, but at the moment I've implemented only the reader\r
-// stuff, and that barely.\r
-// Jonathan Westhues, split Nov 2006\r
-\r
-// Modified by Greg Jones, Jan 2009 to perform modulation onboard in arm rather than on PC\r
-// Also added additional reader commands (SELECT, READ etc.)\r
-\r
-//-----------------------------------------------------------------------------\r
-#include <proxmark3.h>\r
-#include "apps.h"\r
-#include <stdio.h>\r
-#include <stdlib.h>\r
-\r
-// FROM winsrc\prox.h //////////////////////////////////\r
-#define arraylen(x) (sizeof(x)/sizeof((x)[0]))\r
-\r
-//-----------------------------------------------------------------------------\r
-// Map a sequence of octets (~layer 2 command) into the set of bits to feed\r
-// to the FPGA, to transmit that command to the tag.\r
-//-----------------------------------------------------------------------------\r
-\r
- // The sampling rate is 106.353 ksps/s, for T = 18.8 us\r
-\r
- // SOF defined as\r
- // 1) Unmodulated time of 56.64us\r
- // 2) 24 pulses of 423.75khz\r
- // 3) logic '1' (unmodulated for 18.88us followed by 8 pulses of 423.75khz)\r
-\r
- static const int FrameSOF[] = {\r
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,\r
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,\r
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,\r
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,\r
- -1, -1, -1, -1,\r
- -1, -1, -1, -1,\r
- 1, 1, 1, 1,\r
- 1, 1, 1, 1\r
- };\r
- static const int Logic0[] = {\r
- 1, 1, 1, 1,\r
- 1, 1, 1, 1,\r
- -1, -1, -1, -1,\r
- -1, -1, -1, -1\r
- };\r
- static const int Logic1[] = {\r
- -1, -1, -1, -1,\r
- -1, -1, -1, -1,\r
- 1, 1, 1, 1,\r
- 1, 1, 1, 1\r
- };\r
-\r
- // EOF defined as\r
- // 1) logic '0' (8 pulses of 423.75khz followed by unmodulated for 18.88us)\r
- // 2) 24 pulses of 423.75khz\r
- // 3) Unmodulated time of 56.64us\r
-\r
- static const int FrameEOF[] = {\r
- 1, 1, 1, 1,\r
- 1, 1, 1, 1,\r
- -1, -1, -1, -1,\r
- -1, -1, -1, -1,\r
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,\r
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,\r
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,\r
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1\r
- };\r
-\r
-static void CodeIso15693AsReader(BYTE *cmd, int n)\r
-{\r
- int i, j;\r
-\r
- ToSendReset();\r
-\r
- // Give it a bit of slack at the beginning\r
- for(i = 0; i < 24; i++) {\r
- ToSendStuffBit(1);\r
- }\r
-\r
- ToSendStuffBit(0);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(0);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- for(i = 0; i < n; i++) {\r
- for(j = 0; j < 8; j += 2) {\r
- int these = (cmd[i] >> j) & 3;\r
- switch(these) {\r
- case 0:\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(0);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- break;\r
- case 1:\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(0);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- break;\r
- case 2:\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(0);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- break;\r
- case 3:\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(0);\r
- break;\r
- }\r
- }\r
- }\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(1);\r
- ToSendStuffBit(0);\r
- ToSendStuffBit(1);\r
-\r
- // And slack at the end, too.\r
- for(i = 0; i < 24; i++) {\r
- ToSendStuffBit(1);\r
- }\r
-}\r
-\r
-//-----------------------------------------------------------------------------\r
-// The CRC used by ISO 15693.\r
-//-----------------------------------------------------------------------------\r
-static WORD Crc(BYTE *v, int n)\r
-{\r
- DWORD reg;\r
- int i, j;\r
-\r
- reg = 0xffff;\r
- for(i = 0; i < n; i++) {\r
- reg = reg ^ ((DWORD)v[i]);\r
- for (j = 0; j < 8; j++) {\r
- if (reg & 0x0001) {\r
- reg = (reg >> 1) ^ 0x8408;\r
- } else {\r
- reg = (reg >> 1);\r
- }\r
- }\r
- }\r
-\r
- return ~reg;\r
-}\r
-\r
-char *strcat(char *dest, const char *src)\r
-{\r
- size_t dest_len = strlen(dest);\r
- size_t i;\r
- \r
- for (i = 0 ; src[i] != '\0' ; i++)\r
- dest[dest_len + i] = src[i];\r
- dest[dest_len + i] = '\0';\r
- \r
- return dest;\r
-}\r
-\r
-////////////////////////////////////////// code to do 'itoa'\r
-\r
-/* reverse: reverse string s in place */\r
-void reverse(char s[])\r
-{\r
- int c, i, j;\r
-\r
- for (i = 0, j = strlen(s)-1; i<j; i++, j--) {\r
- c = s[i];\r
- s[i] = s[j];\r
- s[j] = c;\r
- }\r
-}\r
-\r
-/* itoa: convert n to characters in s */\r
-void itoa(int n, char s[])\r
-{\r
- int i, sign;\r
-\r
- if ((sign = n) < 0) /* record sign */\r
- n = -n; /* make n positive */\r
- i = 0;\r
- do { /* generate digits in reverse order */\r
- s[i++] = n % 10 + '0'; /* get next digit */\r
- } while ((n /= 10) > 0); /* delete it */\r
- if (sign < 0)\r
- s[i++] = '-';\r
- s[i] = '\0';\r
- reverse(s);\r
-}\r
-\r
-//////////////////////////////////////// END 'itoa' CODE\r
-\r
-//-----------------------------------------------------------------------------\r
-// Encode (into the ToSend buffers) an identify request, which is the first\r
-// thing that you must send to a tag to get a response.\r
-//-----------------------------------------------------------------------------\r
-static void BuildIdentifyRequest(void)\r
-{\r
- BYTE cmd[5];\r
-\r
- WORD crc;\r
- // one sub-carrier, inventory, 1 slot, fast rate\r
- // AFI is at bit 5 (1<<4) when doing an INVENTORY\r
- cmd[0] = (1 << 2) | (1 << 5) | (1 << 1);\r
- // inventory command code\r
- cmd[1] = 0x01;\r
- // no mask\r
- cmd[2] = 0x00;\r
- //Now the CRC\r
- crc = Crc(cmd, 3);\r
- cmd[3] = crc & 0xff;\r
- cmd[4] = crc >> 8;\r
-\r
- CodeIso15693AsReader(cmd, sizeof(cmd));\r
-}\r
-\r
-static void BuildSysInfoRequest(BYTE *uid)\r
-{\r
- BYTE cmd[12];\r
-\r
- WORD crc;\r
- // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block\r
- // followed by teh block data\r
- // one sub-carrier, inventory, 1 slot, fast rate\r
- cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit\r
- // System Information command code\r
- cmd[1] = 0x2B;\r
- // UID may be optionally specified here\r
- // 64-bit UID\r
- cmd[2] = 0x32;\r
- cmd[3]= 0x4b;\r
- cmd[4] = 0x03;\r
- cmd[5] = 0x01;\r
- cmd[6] = 0x00;\r
- cmd[7] = 0x10;\r
- cmd[8] = 0x05;\r
- cmd[9]= 0xe0; // always e0 (not exactly unique)\r
- //Now the CRC\r
- crc = Crc(cmd, 10); // the crc needs to be calculated over 2 bytes\r
- cmd[10] = crc & 0xff;\r
- cmd[11] = crc >> 8;\r
-\r
- CodeIso15693AsReader(cmd, sizeof(cmd));\r
-}\r
-\r
-static void BuildSelectRequest( BYTE uid[])\r
-{\r
-\r
-// uid[6]=0x31; // this is getting ignored - the uid array is not happening...\r
- BYTE cmd[12];\r
-\r
- WORD crc;\r
- // one sub-carrier, inventory, 1 slot, fast rate\r
- //cmd[0] = (1 << 2) | (1 << 5) | (1 << 1); // INVENTROY FLAGS\r
- cmd[0] = (1 << 4) | (1 << 5) | (1 << 1); // Select and addressed FLAGS\r
- // SELECT command code\r
- cmd[1] = 0x25;\r
- // 64-bit UID\r
-// cmd[2] = uid[0];//0x32;\r
-// cmd[3]= uid[1];//0x4b;\r
-// cmd[4] = uid[2];//0x03;\r
-// cmd[5] = uid[3];//0x01;\r
-// cmd[6] = uid[4];//0x00;\r
-// cmd[7] = uid[5];//0x10;\r
-// cmd[8] = uid[6];//0x05;\r
- cmd[2] = 0x32;//\r
- cmd[3] = 0x4b;\r
- cmd[4] = 0x03;\r
- cmd[5] = 0x01;\r
- cmd[6] = 0x00;\r
- cmd[7] = 0x10;\r
- cmd[8] = 0x05; // infineon?\r
-\r
- cmd[9]= 0xe0; // always e0 (not exactly unique)\r
-\r
-// DbpIntegers(cmd[8],cmd[7],cmd[6]);\r
- // Now the CRC\r
- crc = Crc(cmd, 10); // the crc needs to be calculated over 10 bytes\r
- cmd[10] = crc & 0xff;\r
- cmd[11] = crc >> 8;\r
-\r
- CodeIso15693AsReader(cmd, sizeof(cmd));\r
-}\r
-\r
-static void BuildReadBlockRequest(BYTE *uid, BYTE blockNumber )\r
-{\r
- BYTE cmd[13];\r
-\r
- WORD crc;\r
- // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block\r
- // followed by teh block data\r
- // one sub-carrier, inventory, 1 slot, fast rate\r
- cmd[0] = (1 << 6)| (1 << 5) | (1 << 1); // no SELECT bit\r
- // READ BLOCK command code\r
- cmd[1] = 0x20;\r
- // UID may be optionally specified here\r
- // 64-bit UID\r
- cmd[2] = 0x32;\r
- cmd[3]= 0x4b;\r
- cmd[4] = 0x03;\r
- cmd[5] = 0x01;\r
- cmd[6] = 0x00;\r
- cmd[7] = 0x10;\r
- cmd[8] = 0x05;\r
- cmd[9]= 0xe0; // always e0 (not exactly unique)\r
- // Block number to read\r
- cmd[10] = blockNumber;//0x00;\r
- //Now the CRC\r
- crc = Crc(cmd, 11); // the crc needs to be calculated over 2 bytes\r
- cmd[11] = crc & 0xff;\r
- cmd[12] = crc >> 8;\r
-\r
- CodeIso15693AsReader(cmd, sizeof(cmd));\r
-}\r
-\r
-static void BuildReadMultiBlockRequest(BYTE *uid)\r
-{\r
- BYTE cmd[14];\r
-\r
- WORD crc;\r
- // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block\r
- // followed by teh block data\r
- // one sub-carrier, inventory, 1 slot, fast rate\r
- cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit\r
- // READ Multi BLOCK command code\r
- cmd[1] = 0x23;\r
- // UID may be optionally specified here\r
- // 64-bit UID\r
- cmd[2] = 0x32;\r
- cmd[3]= 0x4b;\r
- cmd[4] = 0x03;\r
- cmd[5] = 0x01;\r
- cmd[6] = 0x00;\r
- cmd[7] = 0x10;\r
- cmd[8] = 0x05;\r
- cmd[9]= 0xe0; // always e0 (not exactly unique)\r
- // First Block number to read\r
- cmd[10] = 0x00;\r
- // Number of Blocks to read\r
- cmd[11] = 0x2f; // read quite a few\r
- //Now the CRC\r
- crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes\r
- cmd[12] = crc & 0xff;\r
- cmd[13] = crc >> 8;\r
-\r
- CodeIso15693AsReader(cmd, sizeof(cmd));\r
-}\r
-\r
-static void BuildArbitraryRequest(BYTE *uid,BYTE CmdCode)\r
-{\r
- BYTE cmd[14];\r
-\r
- WORD crc;\r
- // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block\r
- // followed by teh block data\r
- // one sub-carrier, inventory, 1 slot, fast rate\r
- cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit\r
- // READ BLOCK command code\r
- cmd[1] = CmdCode;\r
- // UID may be optionally specified here\r
- // 64-bit UID\r
- cmd[2] = 0x32;\r
- cmd[3]= 0x4b;\r
- cmd[4] = 0x03;\r
- cmd[5] = 0x01;\r
- cmd[6] = 0x00;\r
- cmd[7] = 0x10;\r
- cmd[8] = 0x05;\r
- cmd[9]= 0xe0; // always e0 (not exactly unique)\r
- // Parameter\r
- cmd[10] = 0x00;\r
- cmd[11] = 0x0a;\r
-\r
-// cmd[12] = 0x00;\r
-// cmd[13] = 0x00; //Now the CRC\r
- crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes\r
- cmd[12] = crc & 0xff;\r
- cmd[13] = crc >> 8;\r
-\r
- CodeIso15693AsReader(cmd, sizeof(cmd));\r
-}\r
-\r
-static void BuildArbitraryCustomRequest(BYTE uid[], BYTE CmdCode)\r
-{\r
- BYTE cmd[14];\r
-\r
- WORD crc;\r
- // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block\r
- // followed by teh block data\r
- // one sub-carrier, inventory, 1 slot, fast rate\r
- cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit\r
- // READ BLOCK command code\r
- cmd[1] = CmdCode;\r
- // UID may be optionally specified here\r
- // 64-bit UID\r
- cmd[2] = 0x32;\r
- cmd[3]= 0x4b;\r
- cmd[4] = 0x03;\r
- cmd[5] = 0x01;\r
- cmd[6] = 0x00;\r
- cmd[7] = 0x10;\r
- cmd[8] = 0x05;\r
- cmd[9]= 0xe0; // always e0 (not exactly unique)\r
- // Parameter\r
- cmd[10] = 0x05; // for custom codes this must be manufcturer code\r
- cmd[11] = 0x00;\r
-\r
-// cmd[12] = 0x00;\r
-// cmd[13] = 0x00; //Now the CRC\r
- crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes\r
- cmd[12] = crc & 0xff;\r
- cmd[13] = crc >> 8;\r
-\r
- CodeIso15693AsReader(cmd, sizeof(cmd));\r
-}\r
-\r
-/////////////////////////////////////////////////////////////////////////\r
-// Now the VICC>VCD responses when we are simulating a tag\r
-////////////////////////////////////////////////////////////////////\r
-\r
- static void BuildInventoryResponse(void)\r
-{\r
- BYTE cmd[12];\r
-\r
- WORD crc;\r
- // one sub-carrier, inventory, 1 slot, fast rate\r
- // AFI is at bit 5 (1<<4) when doing an INVENTORY\r
- cmd[0] = 0; //(1 << 2) | (1 << 5) | (1 << 1);\r
- cmd[1] = 0;\r
- // 64-bit UID\r
- cmd[2] = 0x32;\r
- cmd[3]= 0x4b;\r
- cmd[4] = 0x03;\r
- cmd[5] = 0x01;\r
- cmd[6] = 0x00;\r
- cmd[7] = 0x10;\r
- cmd[8] = 0x05;\r
- cmd[9]= 0xe0;\r
- //Now the CRC\r
- crc = Crc(cmd, 10);\r
- cmd[10] = crc & 0xff;\r
- cmd[11] = crc >> 8;\r
-\r
- CodeIso15693AsReader(cmd, sizeof(cmd));\r
-}\r
-\r
-//-----------------------------------------------------------------------------\r
-// Transmit the command (to the tag) that was placed in ToSend[].\r
-//-----------------------------------------------------------------------------\r
-static void TransmitTo15693Tag(const BYTE *cmd, int len, int *samples, int *wait)\r
-{\r
- int c;\r
-\r
-// FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);\r
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX);\r
- if(*wait < 10) { *wait = 10; }\r
-\r
-// for(c = 0; c < *wait;) {\r
-// if(SSC_STATUS & (SSC_STATUS_TX_READY)) {\r
-// SSC_TRANSMIT_HOLDING = 0x00; // For exact timing!\r
-// c++;\r
-// }\r
-// if(SSC_STATUS & (SSC_STATUS_RX_READY)) {\r
-// volatile DWORD r = SSC_RECEIVE_HOLDING;\r
-// (void)r;\r
-// }\r
-// WDT_HIT();\r
-// }\r
-\r
- c = 0;\r
- for(;;) {\r
- if(SSC_STATUS & (SSC_STATUS_TX_READY)) {\r
- SSC_TRANSMIT_HOLDING = cmd[c];\r
- c++;\r
- if(c >= len) {\r
- break;\r
- }\r
- }\r
- if(SSC_STATUS & (SSC_STATUS_RX_READY)) {\r
- volatile DWORD r = SSC_RECEIVE_HOLDING;\r
- (void)r;\r
- }\r
- WDT_HIT();\r
- }\r
- *samples = (c + *wait) << 3;\r
-}\r
-\r
-//-----------------------------------------------------------------------------\r
-// Transmit the command (to the reader) that was placed in ToSend[].\r
-//-----------------------------------------------------------------------------\r
-static void TransmitTo15693Reader(const BYTE *cmd, int len, int *samples, int *wait)\r
-{\r
- int c;\r
-\r
-// FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX);\r
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR); // No requirement to energise my coils\r
- if(*wait < 10) { *wait = 10; }\r
-\r
- c = 0;\r
- for(;;) {\r
- if(SSC_STATUS & (SSC_STATUS_TX_READY)) {\r
- SSC_TRANSMIT_HOLDING = cmd[c];\r
- c++;\r
- if(c >= len) {\r
- break;\r
- }\r
- }\r
- if(SSC_STATUS & (SSC_STATUS_RX_READY)) {\r
- volatile DWORD r = SSC_RECEIVE_HOLDING;\r
- (void)r;\r
- }\r
- WDT_HIT();\r
- }\r
- *samples = (c + *wait) << 3;\r
-}\r
-\r
-static int GetIso15693AnswerFromTag(BYTE *receivedResponse, int maxLen, int *samples, int *elapsed)\r
-{\r
- int c = 0;\r
- BYTE *dest = (BYTE *)BigBuf;\r
- int getNext = 0;\r
-\r
- SBYTE prev = 0;\r
-\r
-// NOW READ RESPONSE\r
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);\r
- //spindelay(60); // greg - experiment to get rid of some of the 0 byte/failed reads\r
- c = 0;\r
- getNext = FALSE;\r
- for(;;) {\r
- if(SSC_STATUS & (SSC_STATUS_TX_READY)) {\r
- SSC_TRANSMIT_HOLDING = 0x43;\r
- }\r
- if(SSC_STATUS & (SSC_STATUS_RX_READY)) {\r
- SBYTE b;\r
- b = (SBYTE)SSC_RECEIVE_HOLDING;\r
-\r
- // The samples are correlations against I and Q versions of the\r
- // tone that the tag AM-modulates, so every other sample is I,\r
- // every other is Q. We just want power, so abs(I) + abs(Q) is\r
- // close to what we want.\r
- if(getNext) {\r
- SBYTE r;\r
-\r
- if(b < 0) {\r
- r = -b;\r
- } else {\r
- r = b;\r
- }\r
- if(prev < 0) {\r
- r -= prev;\r
- } else {\r
- r += prev;\r
- }\r
-\r
- dest[c++] = (BYTE)r;\r
-\r
- if(c >= 2000) {\r
- break;\r
- }\r
- } else {\r
- prev = b;\r
- }\r
-\r
- getNext = !getNext;\r
- }\r
- }\r
-\r
-//////////////////////////////////////////\r
-/////////// DEMODULATE ///////////////////\r
-//////////////////////////////////////////\r
-\r
- int i, j;\r
- int max = 0, maxPos=0;\r
-\r
- int skip = 4;\r
-\r
-// if(GraphTraceLen < 1000) return; // THIS CHECKS FOR A BUFFER TO SMALL\r
-\r
- // First, correlate for SOF\r
- for(i = 0; i < 100; i++) {\r
- int corr = 0;\r
- for(j = 0; j < arraylen(FrameSOF); j += skip) {\r
- corr += FrameSOF[j]*dest[i+(j/skip)];\r
- }\r
- if(corr > max) {\r
- max = corr;\r
- maxPos = i;\r
- }\r
- }\r
-// DbpString("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip));\r
-\r
- int k = 0; // this will be our return value\r
-\r
- // greg - If correlation is less than 1 then there's little point in continuing\r
- if ((max/(arraylen(FrameSOF)/skip)) >= 1)\r
- {\r
-\r
- i = maxPos + arraylen(FrameSOF)/skip;\r
-\r
- BYTE outBuf[20];\r
- memset(outBuf, 0, sizeof(outBuf));\r
- BYTE mask = 0x01;\r
- for(;;) {\r
- int corr0 = 0, corr1 = 0, corrEOF = 0;\r
- for(j = 0; j < arraylen(Logic0); j += skip) {\r
- corr0 += Logic0[j]*dest[i+(j/skip)];\r
- }\r
- for(j = 0; j < arraylen(Logic1); j += skip) {\r
- corr1 += Logic1[j]*dest[i+(j/skip)];\r
- }\r
- for(j = 0; j < arraylen(FrameEOF); j += skip) {\r
- corrEOF += FrameEOF[j]*dest[i+(j/skip)];\r
- }\r
- // Even things out by the length of the target waveform.\r
- corr0 *= 4;\r
- corr1 *= 4;\r
-\r
- if(corrEOF > corr1 && corrEOF > corr0) {\r
-// DbpString("EOF at %d", i);\r
- break;\r
- } else if(corr1 > corr0) {\r
- i += arraylen(Logic1)/skip;\r
- outBuf[k] |= mask;\r
- } else {\r
- i += arraylen(Logic0)/skip;\r
- }\r
- mask <<= 1;\r
- if(mask == 0) {\r
- k++;\r
- mask = 0x01;\r
- }\r
- if((i+(int)arraylen(FrameEOF)) >= 2000) {\r
- DbpString("ran off end!");\r
- break;\r
- }\r
- }\r
- if(mask != 0x01) {\r
- DbpString("error, uneven octet! (discard extra bits!)");\r
-/// DbpString(" mask=%02x", mask);\r
- }\r
-// BYTE str1 [8];\r
-// itoa(k,str1);\r
-// strcat(str1," octets read");\r
-\r
-// DbpString( str1); // DbpString("%d octets", k);\r
-\r
-// for(i = 0; i < k; i+=3) {\r
-// //DbpString("# %2d: %02x ", i, outBuf[i]);\r
-// DbpIntegers(outBuf[i],outBuf[i+1],outBuf[i+2]);\r
-// }\r
-\r
- for(i = 0; i < k; i++) {\r
- receivedResponse[i] = outBuf[i];\r
- }\r
- } // "end if correlation > 0" (max/(arraylen(FrameSOF)/skip))\r
- return k; // return the number of bytes demodulated\r
-\r
-/// DbpString("CRC=%04x", Iso15693Crc(outBuf, k-2));\r
-\r
-}\r
-\r
-// Now the GetISO15693 message from sniffing command\r
-static int GetIso15693AnswerFromSniff(BYTE *receivedResponse, int maxLen, int *samples, int *elapsed)\r
-{\r
- int c = 0;\r
- BYTE *dest = (BYTE *)BigBuf;\r
- int getNext = 0;\r
-\r
- SBYTE prev = 0;\r
-\r
-// NOW READ RESPONSE\r
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);\r
- //spindelay(60); // greg - experiment to get rid of some of the 0 byte/failed reads\r
- c = 0;\r
- getNext = FALSE;\r
- for(;;) {\r
- if(SSC_STATUS & (SSC_STATUS_TX_READY)) {\r
- SSC_TRANSMIT_HOLDING = 0x43;\r
- }\r
- if(SSC_STATUS & (SSC_STATUS_RX_READY)) {\r
- SBYTE b;\r
- b = (SBYTE)SSC_RECEIVE_HOLDING;\r
-\r
- // The samples are correlations against I and Q versions of the\r
- // tone that the tag AM-modulates, so every other sample is I,\r
- // every other is Q. We just want power, so abs(I) + abs(Q) is\r
- // close to what we want.\r
- if(getNext) {\r
- SBYTE r;\r
-\r
- if(b < 0) {\r
- r = -b;\r
- } else {\r
- r = b;\r
- }\r
- if(prev < 0) {\r
- r -= prev;\r
- } else {\r
- r += prev;\r
- }\r
-\r
- dest[c++] = (BYTE)r;\r
-\r
- if(c >= 20000) {\r
- break;\r
- }\r
- } else {\r
- prev = b;\r
- }\r
-\r
- getNext = !getNext;\r
- }\r
- }\r
-\r
-//////////////////////////////////////////\r
-/////////// DEMODULATE ///////////////////\r
-//////////////////////////////////////////\r
-\r
- int i, j;\r
- int max = 0, maxPos=0;\r
-\r
- int skip = 4;\r
-\r
-// if(GraphTraceLen < 1000) return; // THIS CHECKS FOR A BUFFER TO SMALL\r
-\r
- // First, correlate for SOF\r
- for(i = 0; i < 19000; i++) {\r
- int corr = 0;\r
- for(j = 0; j < arraylen(FrameSOF); j += skip) {\r
- corr += FrameSOF[j]*dest[i+(j/skip)];\r
- }\r
- if(corr > max) {\r
- max = corr;\r
- maxPos = i;\r
- }\r
- }\r
-// DbpString("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip));\r
-\r
- int k = 0; // this will be our return value\r
-\r
- // greg - If correlation is less than 1 then there's little point in continuing\r
- if ((max/(arraylen(FrameSOF)/skip)) >= 1) // THIS SHOULD BE 1\r
- {\r
-\r
- i = maxPos + arraylen(FrameSOF)/skip;\r
-\r
- BYTE outBuf[20];\r
- memset(outBuf, 0, sizeof(outBuf));\r
- BYTE mask = 0x01;\r
- for(;;) {\r
- int corr0 = 0, corr1 = 0, corrEOF = 0;\r
- for(j = 0; j < arraylen(Logic0); j += skip) {\r
- corr0 += Logic0[j]*dest[i+(j/skip)];\r
- }\r
- for(j = 0; j < arraylen(Logic1); j += skip) {\r
- corr1 += Logic1[j]*dest[i+(j/skip)];\r
- }\r
- for(j = 0; j < arraylen(FrameEOF); j += skip) {\r
- corrEOF += FrameEOF[j]*dest[i+(j/skip)];\r
- }\r
- // Even things out by the length of the target waveform.\r
- corr0 *= 4;\r
- corr1 *= 4;\r
-\r
- if(corrEOF > corr1 && corrEOF > corr0) {\r
-// DbpString("EOF at %d", i);\r
- break;\r
- } else if(corr1 > corr0) {\r
- i += arraylen(Logic1)/skip;\r
- outBuf[k] |= mask;\r
- } else {\r
- i += arraylen(Logic0)/skip;\r
- }\r
- mask <<= 1;\r
- if(mask == 0) {\r
- k++;\r
- mask = 0x01;\r
- }\r
- if((i+(int)arraylen(FrameEOF)) >= 2000) {\r
- DbpString("ran off end!");\r
- break;\r
- }\r
- }\r
- if(mask != 0x01) {\r
- DbpString("error, uneven octet! (discard extra bits!)");\r
-/// DbpString(" mask=%02x", mask);\r
- }\r
-// BYTE str1 [8];\r
-// itoa(k,str1);\r
-// strcat(str1," octets read");\r
-\r
-// DbpString( str1); // DbpString("%d octets", k);\r
-\r
-// for(i = 0; i < k; i+=3) {\r
-// //DbpString("# %2d: %02x ", i, outBuf[i]);\r
-// DbpIntegers(outBuf[i],outBuf[i+1],outBuf[i+2]);\r
-// }\r
-\r
- for(i = 0; i < k; i++) {\r
- receivedResponse[i] = outBuf[i];\r
- }\r
- } // "end if correlation > 0" (max/(arraylen(FrameSOF)/skip))\r
- return k; // return the number of bytes demodulated\r
-\r
-/// DbpString("CRC=%04x", Iso15693Crc(outBuf, k-2));\r
-}\r
-\r
-//-----------------------------------------------------------------------------\r
-// Start to read an ISO 15693 tag. We send an identify request, then wait\r
-// for the response. The response is not demodulated, just left in the buffer\r
-// so that it can be downloaded to a PC and processed there.\r
-//-----------------------------------------------------------------------------\r
-void AcquireRawAdcSamplesIso15693(void)\r
-{\r
- int c = 0;\r
- BYTE *dest = (BYTE *)BigBuf;\r
- int getNext = 0;\r
-\r
- SBYTE prev = 0;\r
-\r
- BuildIdentifyRequest();\r
-\r
- SetAdcMuxFor(GPIO_MUXSEL_HIPKD);\r
-\r
- // Give the tags time to energize\r
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);\r
- SpinDelay(100);\r
-\r
- // Now send the command\r
- FpgaSetupSsc();\r
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX);\r
-\r
- c = 0;\r
- for(;;) {\r
- if(SSC_STATUS & (SSC_STATUS_TX_READY)) {\r
- SSC_TRANSMIT_HOLDING = ToSend[c];\r
- c++;\r
- if(c == ToSendMax+3) {\r
- break;\r
- }\r
- }\r
- if(SSC_STATUS & (SSC_STATUS_RX_READY)) {\r
- volatile DWORD r = SSC_RECEIVE_HOLDING;\r
- (void)r;\r
- }\r
- WDT_HIT();\r
- }\r
-\r
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);\r
-\r
- c = 0;\r
- getNext = FALSE;\r
- for(;;) {\r
- if(SSC_STATUS & (SSC_STATUS_TX_READY)) {\r
- SSC_TRANSMIT_HOLDING = 0x43;\r
- }\r
- if(SSC_STATUS & (SSC_STATUS_RX_READY)) {\r
- SBYTE b;\r
- b = (SBYTE)SSC_RECEIVE_HOLDING;\r
-\r
- // The samples are correlations against I and Q versions of the\r
- // tone that the tag AM-modulates, so every other sample is I,\r
- // every other is Q. We just want power, so abs(I) + abs(Q) is\r
- // close to what we want.\r
- if(getNext) {\r
- SBYTE r;\r
-\r
- if(b < 0) {\r
- r = -b;\r
- } else {\r
- r = b;\r
- }\r
- if(prev < 0) {\r
- r -= prev;\r
- } else {\r
- r += prev;\r
- }\r
-\r
- dest[c++] = (BYTE)r;\r
-\r
- if(c >= 2000) {\r
- break;\r
- }\r
- } else {\r
- prev = b;\r
- }\r
-\r
- getNext = !getNext;\r
- }\r
- }\r
-}\r
-\r
-//-----------------------------------------------------------------------------\r
-// Simulate an ISO15693 reader, perform anti-collision and then attempt to read a sector\r
-// all demodulation performed in arm rather than host. - greg\r
-//-----------------------------------------------------------------------------\r
-void ReaderIso15693(DWORD parameter)\r
-{\r
- LED_A_ON();\r
- LED_B_ON();\r
- LED_C_OFF();\r
- LED_D_OFF();\r
-\r
-//DbpString(parameter);\r
-\r
- BYTE *receivedAnswer0 = (((BYTE *)BigBuf) + 3560); // allow 100 bytes per reponse (way too much)\r
- BYTE *receivedAnswer1 = (((BYTE *)BigBuf) + 3660); //\r
- BYTE *receivedAnswer2 = (((BYTE *)BigBuf) + 3760);\r
- BYTE *receivedAnswer3 = (((BYTE *)BigBuf) + 3860);\r
- //BYTE *TagUID= (((BYTE *)BigBuf) + 3960); // where we hold the uid for hi15reader\r
-// int responseLen0 = 0;\r
- int responseLen1 = 0;\r
- int responseLen2 = 0;\r
- int responseLen3 = 0;\r
-\r
- // Blank arrays\r
- int j;\r
- for(j = 0; j < 100; j++) {\r
- receivedAnswer3[j] = 0;\r
- receivedAnswer2[j] =0;\r
- receivedAnswer1[j] = 0;\r
- receivedAnswer0[j] = 0;\r
- }\r
-\r
- // Setup SSC\r
- FpgaSetupSsc();\r
-\r
- // Start from off (no field generated)\r
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
- SpinDelay(200);\r
-\r
- SetAdcMuxFor(GPIO_MUXSEL_HIPKD);\r
- FpgaSetupSsc();\r
-\r
- // Give the tags time to energize\r
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);\r
- SpinDelay(200);\r
-\r
- LED_A_ON();\r
- LED_B_OFF();\r
- LED_C_OFF();\r
- LED_D_OFF();\r
-\r
- int samples = 0;\r
- int tsamples = 0;\r
- int wait = 0;\r
- int elapsed = 0;\r
-\r
- // FIRST WE RUN AN INVENTORY TO GET THE TAG UID\r
- // THIS MEANS WE CAN PRE-BUILD REQUESTS TO SAVE CPU TIME\r
- BYTE TagUID[7]; // where we hold the uid for hi15reader\r
-\r
-// BuildIdentifyRequest();\r
-// //TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);\r
-// TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3\r
-// // Now wait for a response\r
-// responseLen0 = GetIso15693AnswerFromTag(receivedAnswer0, 100, &samples, &elapsed) ;\r
-// if (responseLen0 >=12) // we should do a better check than this\r
-// {\r
-// // really we should check it is a valid mesg\r
-// // but for now just grab what we think is the uid\r
-// TagUID[0] = receivedAnswer0[2];\r
-// TagUID[1] = receivedAnswer0[3];\r
-// TagUID[2] = receivedAnswer0[4];\r
-// TagUID[3] = receivedAnswer0[5];\r
-// TagUID[4] = receivedAnswer0[6];\r
-// TagUID[5] = receivedAnswer0[7];\r
-// TagUID[6] = receivedAnswer0[8]; // IC Manufacturer code\r
-// DbpIntegers(TagUID[6],TagUID[5],TagUID[4]);\r
-//}\r
-\r
- // Now send the IDENTIFY command\r
- BuildIdentifyRequest();\r
- //TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);\r
- TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3\r
- // Now wait for a response\r
- responseLen1 = GetIso15693AnswerFromTag(receivedAnswer1, 100, &samples, &elapsed) ;\r
-\r
- if (responseLen1 >=12) // we should do a better check than this\r
- {\r
-\r
- TagUID[0] = receivedAnswer1[2];\r
- TagUID[1] = receivedAnswer1[3];\r
- TagUID[2] = receivedAnswer1[4];\r
- TagUID[3] = receivedAnswer1[5];\r
- TagUID[4] = receivedAnswer1[6];\r
- TagUID[5] = receivedAnswer1[7];\r
- TagUID[6] = receivedAnswer1[8]; // IC Manufacturer code\r
-\r
- // Now send the SELECT command\r
- BuildSelectRequest(TagUID);\r
- TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3\r
- // Now wait for a response\r
- responseLen2 = GetIso15693AnswerFromTag(receivedAnswer2, 100, &samples, &elapsed);\r
-\r
- // Now send the MULTI READ command\r
-// BuildArbitraryRequest(*TagUID,parameter);\r
- BuildArbitraryCustomRequest(TagUID,parameter);\r
-// BuildReadBlockRequest(*TagUID,parameter);\r
-// BuildSysInfoRequest(*TagUID);\r
- //TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);\r
- TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3\r
- // Now wait for a response\r
- responseLen3 = GetIso15693AnswerFromTag(receivedAnswer3, 100, &samples, &elapsed) ;\r
-\r
- }\r
-\r
- char str1 [4];\r
- //char str2 [200];\r
- int i;\r
-\r
- itoa(responseLen1,str1);\r
- strcat(str1," octets read from IDENTIFY request");\r
- DbpString(str1);\r
- for(i = 0; i < responseLen1; i+=3) {\r
- DbpIntegers(receivedAnswer1[i],receivedAnswer1[i+1],receivedAnswer1[i+2]);\r
- }\r
-\r
- itoa(responseLen2,str1);\r
- strcat(str1," octets read from SELECT request");\r
- DbpString(str1);\r
- for(i = 0; i < responseLen2; i+=3) {\r
- DbpIntegers(receivedAnswer2[i],receivedAnswer2[i+1],receivedAnswer2[i+2]);\r
- }\r
-\r
- itoa(responseLen3,str1);\r
- strcat(str1," octets read from XXX request");\r
- DbpString(str1);\r
- for(i = 0; i < responseLen3; i+=3) {\r
- DbpIntegers(receivedAnswer3[i],receivedAnswer3[i+1],receivedAnswer3[i+2]);\r
- }\r
-\r
-// str2[0]=0;\r
-// for(i = 0; i < responseLen3; i++) {\r
-// itoa(str1,receivedAnswer3[i]);\r
-// strcat(str2,str1);\r
-// }\r
-// DbpString(str2);\r
-\r
- LED_A_OFF();\r
- LED_B_OFF();\r
- LED_C_OFF();\r
- LED_D_OFF();\r
-}\r
-\r
-//-----------------------------------------------------------------------------\r
-// Simulate an ISO15693 TAG, perform anti-collision and then print any reader commands\r
-// all demodulation performed in arm rather than host. - greg\r
-//-----------------------------------------------------------------------------\r
-void SimTagIso15693(DWORD parameter)\r
-{\r
- LED_A_ON();\r
- LED_B_ON();\r
- LED_C_OFF();\r
- LED_D_OFF();\r
-\r
-//DbpString(parameter);\r
-\r
- BYTE *receivedAnswer0 = (((BYTE *)BigBuf) + 3560); // allow 100 bytes per reponse (way too much)\r
- BYTE *receivedAnswer1 = (((BYTE *)BigBuf) + 3660); //\r
- BYTE *receivedAnswer2 = (((BYTE *)BigBuf) + 3760);\r
- BYTE *receivedAnswer3 = (((BYTE *)BigBuf) + 3860);\r
- //BYTE *TagUID= (((BYTE *)BigBuf) + 3960); // where we hold the uid for hi15reader\r
-// int responseLen0 = 0;\r
- int responseLen1 = 0;\r
-// int responseLen2 = 0;\r
-// int responseLen3 = 0;\r
-\r
- // Blank arrays\r
- int j;\r
- for(j = 0; j < 100; j++) {\r
- receivedAnswer3[j] = 0;\r
- receivedAnswer2[j] =0;\r
- receivedAnswer1[j] = 0;\r
- receivedAnswer0[j] = 0;\r
- }\r
-\r
- // Setup SSC\r
- FpgaSetupSsc();\r
-\r
- // Start from off (no field generated)\r
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);\r
- SpinDelay(200);\r
-\r
- SetAdcMuxFor(GPIO_MUXSEL_HIPKD);\r
- FpgaSetupSsc();\r
-\r
- // Give the tags time to energize\r
-// FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); // NO GOOD FOR SIM TAG!!!!\r
- SpinDelay(200);\r
-\r
- LED_A_OFF();\r
- LED_B_OFF();\r
- LED_C_ON();\r
- LED_D_OFF();\r
-\r
- int samples = 0;\r
- int tsamples = 0;\r
- int wait = 0;\r
- int elapsed = 0;\r
-\r
- // FIRST WE RUN AN INVENTORY TO GET THE TAG UID\r
- // THIS MEANS WE CAN PRE-BUILD REQUESTS TO SAVE CPU TIME\r
- // BYTE TagUID[7]; // where we hold the uid for hi15reader\r
-\r
- // Now send the IDENTIFY command\r
- // BuildIdentifyRequest();\r
- // TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3\r
-\r
- // Now wait for a command from the reader\r
- responseLen1=0;\r
- // while(responseLen1=0) {\r
- // if(BUTTON_PRESS()) break;\r
- responseLen1 = GetIso15693AnswerFromSniff(receivedAnswer1, 100, &samples, &elapsed) ;\r
- // }\r
-\r
- if (responseLen1 >=1) // we should do a better check than this\r
- {\r
- // Build a suitable reponse to the reader INVENTORY cocmmand\r
- BuildInventoryResponse();\r
- TransmitTo15693Reader(ToSend,ToSendMax,&tsamples, &wait);\r
-\r
- // Now wait for a command from the reader\r
-// responseLen2 = GetIso15693AnswerFromTag(receivedAnswer2, 100, &samples, &elapsed);\r
-\r
- // Now wait for a command from the reader\r
-// responseLen3 = GetIso15693AnswerFromTag(receivedAnswer3, 100, &samples, &elapsed) ;\r
-\r
- }\r
-\r
- char str1 [4];\r
- //char str2 [200];\r
- int i;\r
-\r
- itoa(responseLen1,str1);\r
- strcat(str1," octets read from reader command");\r
- DbpString(str1);\r
- for(i = 0; i < responseLen1; i+=3) {\r
- DbpIntegers(receivedAnswer1[i],receivedAnswer1[i+1],receivedAnswer1[i+2]);\r
- }\r
-\r
-// itoa(responseLen2,str1);\r
-// strcat(str1," octets read from SELECT request");\r
-// DbpString(str1);\r
-// for(i = 0; i < responseLen2; i+=3) {\r
-// DbpIntegers(receivedAnswer2[i],receivedAnswer2[i+1],receivedAnswer2[i+2]);\r
-// }\r
-//\r
-// itoa(responseLen3,str1);\r
-// strcat(str1," octets read from XXX request");\r
-// DbpString(str1);\r
-// for(i = 0; i < responseLen3; i+=3) {\r
-// DbpIntegers(receivedAnswer3[i],receivedAnswer3[i+1],receivedAnswer3[i+2]);\r
-// }\r
-\r
-// str2[0]=0;\r
-// for(i = 0; i < responseLen3; i++) {\r
-// itoa(str1,receivedAnswer3[i]);\r
-// strcat(str2,str1);\r
-// }\r
-// DbpString(str2);\r
-\r
- LED_A_OFF();\r
- LED_B_OFF();\r
- LED_C_OFF();\r
- LED_D_OFF();\r
-}\r
+//-----------------------------------------------------------------------------
+// Jonathan Westhues, split Nov 2006
+// Modified by Greg Jones, Jan 2009
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Routines to support ISO 15693. This includes both the reader software and
+// the `fake tag' modes, but at the moment I've implemented only the reader
+// stuff, and that barely.
+// Modified to perform modulation onboard in arm rather than on PC
+// Also added additional reader commands (SELECT, READ etc.)
+//-----------------------------------------------------------------------------
+
+#include "proxmark3.h"
+#include "util.h"
+#include "apps.h"
+#include "string.h"
+
+// FROM winsrc\prox.h //////////////////////////////////
+#define arraylen(x) (sizeof(x)/sizeof((x)[0]))
+
+//-----------------------------------------------------------------------------
+// Map a sequence of octets (~layer 2 command) into the set of bits to feed
+// to the FPGA, to transmit that command to the tag.
+//-----------------------------------------------------------------------------
+
+ // The sampling rate is 106.353 ksps/s, for T = 18.8 us
+
+ // SOF defined as
+ // 1) Unmodulated time of 56.64us
+ // 2) 24 pulses of 423.75khz
+ // 3) logic '1' (unmodulated for 18.88us followed by 8 pulses of 423.75khz)
+
+ static const int FrameSOF[] = {
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ -1, -1, -1, -1,
+ -1, -1, -1, -1,
+ 1, 1, 1, 1,
+ 1, 1, 1, 1
+ };
+ static const int Logic0[] = {
+ 1, 1, 1, 1,
+ 1, 1, 1, 1,
+ -1, -1, -1, -1,
+ -1, -1, -1, -1
+ };
+ static const int Logic1[] = {
+ -1, -1, -1, -1,
+ -1, -1, -1, -1,
+ 1, 1, 1, 1,
+ 1, 1, 1, 1
+ };
+
+ // EOF defined as
+ // 1) logic '0' (8 pulses of 423.75khz followed by unmodulated for 18.88us)
+ // 2) 24 pulses of 423.75khz
+ // 3) Unmodulated time of 56.64us
+
+ static const int FrameEOF[] = {
+ 1, 1, 1, 1,
+ 1, 1, 1, 1,
+ -1, -1, -1, -1,
+ -1, -1, -1, -1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
+ };
+
+static void CodeIso15693AsReader(uint8_t *cmd, int n)
+{
+ int i, j;
+
+ ToSendReset();
+
+ // Give it a bit of slack at the beginning
+ for(i = 0; i < 24; i++) {
+ ToSendStuffBit(1);
+ }
+
+ ToSendStuffBit(0);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(0);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ for(i = 0; i < n; i++) {
+ for(j = 0; j < 8; j += 2) {
+ int these = (cmd[i] >> j) & 3;
+ switch(these) {
+ case 0:
+ ToSendStuffBit(1);
+ ToSendStuffBit(0);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ break;
+ case 1:
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(0);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ break;
+ case 2:
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(0);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ break;
+ case 3:
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(0);
+ break;
+ }
+ }
+ }
+ ToSendStuffBit(1);
+ ToSendStuffBit(1);
+ ToSendStuffBit(0);
+ ToSendStuffBit(1);
+
+ // And slack at the end, too.
+ for(i = 0; i < 24; i++) {
+ ToSendStuffBit(1);
+ }
+}
+
+//-----------------------------------------------------------------------------
+// The CRC used by ISO 15693.
+//-----------------------------------------------------------------------------
+static uint16_t Crc(uint8_t *v, int n)
+{
+ uint32_t reg;
+ int i, j;
+
+ reg = 0xffff;
+ for(i = 0; i < n; i++) {
+ reg = reg ^ ((uint32_t)v[i]);
+ for (j = 0; j < 8; j++) {
+ if (reg & 0x0001) {
+ reg = (reg >> 1) ^ 0x8408;
+ } else {
+ reg = (reg >> 1);
+ }
+ }
+ }
+
+ return ~reg;
+}
+
+char *strcat(char *dest, const char *src)
+{
+ size_t dest_len = strlen(dest);
+ size_t i;
+
+ for (i = 0 ; src[i] != '\0' ; i++)
+ dest[dest_len + i] = src[i];
+ dest[dest_len + i] = '\0';
+
+ return dest;
+}
+
+////////////////////////////////////////// code to do 'itoa'
+
+/* reverse: reverse string s in place */
+void reverse(char s[])
+{
+ int c, i, j;
+
+ for (i = 0, j = strlen(s)-1; i<j; i++, j--) {
+ c = s[i];
+ s[i] = s[j];
+ s[j] = c;
+ }
+}
+
+/* itoa: convert n to characters in s */
+void itoa(int n, char s[])
+{
+ int i, sign;
+
+ if ((sign = n) < 0) /* record sign */
+ n = -n; /* make n positive */
+ i = 0;
+ do { /* generate digits in reverse order */
+ s[i++] = n % 10 + '0'; /* get next digit */
+ } while ((n /= 10) > 0); /* delete it */
+ if (sign < 0)
+ s[i++] = '-';
+ s[i] = '\0';
+ reverse(s);
+}
+
+//////////////////////////////////////// END 'itoa' CODE
+
+//-----------------------------------------------------------------------------
+// Encode (into the ToSend buffers) an identify request, which is the first
+// thing that you must send to a tag to get a response.
+//-----------------------------------------------------------------------------
+static void BuildIdentifyRequest(void)
+{
+ uint8_t cmd[5];
+
+ uint16_t crc;
+ // one sub-carrier, inventory, 1 slot, fast rate
+ // AFI is at bit 5 (1<<4) when doing an INVENTORY
+ cmd[0] = (1 << 2) | (1 << 5) | (1 << 1);
+ // inventory command code
+ cmd[1] = 0x01;
+ // no mask
+ cmd[2] = 0x00;
+ //Now the CRC
+ crc = Crc(cmd, 3);
+ cmd[3] = crc & 0xff;
+ cmd[4] = crc >> 8;
+
+ CodeIso15693AsReader(cmd, sizeof(cmd));
+}
+
+static void __attribute__((unused)) BuildSysInfoRequest(uint8_t *uid)
+{
+ uint8_t cmd[12];
+
+ uint16_t crc;
+ // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block
+ // followed by teh block data
+ // one sub-carrier, inventory, 1 slot, fast rate
+ cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit
+ // System Information command code
+ cmd[1] = 0x2B;
+ // UID may be optionally specified here
+ // 64-bit UID
+ cmd[2] = 0x32;
+ cmd[3]= 0x4b;
+ cmd[4] = 0x03;
+ cmd[5] = 0x01;
+ cmd[6] = 0x00;
+ cmd[7] = 0x10;
+ cmd[8] = 0x05;
+ cmd[9]= 0xe0; // always e0 (not exactly unique)
+ //Now the CRC
+ crc = Crc(cmd, 10); // the crc needs to be calculated over 2 bytes
+ cmd[10] = crc & 0xff;
+ cmd[11] = crc >> 8;
+
+ CodeIso15693AsReader(cmd, sizeof(cmd));
+}
+
+static void BuildSelectRequest( uint8_t uid[])
+{
+
+// uid[6]=0x31; // this is getting ignored - the uid array is not happening...
+ uint8_t cmd[12];
+
+ uint16_t crc;
+ // one sub-carrier, inventory, 1 slot, fast rate
+ //cmd[0] = (1 << 2) | (1 << 5) | (1 << 1); // INVENTROY FLAGS
+ cmd[0] = (1 << 4) | (1 << 5) | (1 << 1); // Select and addressed FLAGS
+ // SELECT command code
+ cmd[1] = 0x25;
+ // 64-bit UID
+// cmd[2] = uid[0];//0x32;
+// cmd[3]= uid[1];//0x4b;
+// cmd[4] = uid[2];//0x03;
+// cmd[5] = uid[3];//0x01;
+// cmd[6] = uid[4];//0x00;
+// cmd[7] = uid[5];//0x10;
+// cmd[8] = uid[6];//0x05;
+ cmd[2] = 0x32;//
+ cmd[3] = 0x4b;
+ cmd[4] = 0x03;
+ cmd[5] = 0x01;
+ cmd[6] = 0x00;
+ cmd[7] = 0x10;
+ cmd[8] = 0x05; // infineon?
+
+ cmd[9]= 0xe0; // always e0 (not exactly unique)
+
+// DbpIntegers(cmd[8],cmd[7],cmd[6]);
+ // Now the CRC
+ crc = Crc(cmd, 10); // the crc needs to be calculated over 10 bytes
+ cmd[10] = crc & 0xff;
+ cmd[11] = crc >> 8;
+
+ CodeIso15693AsReader(cmd, sizeof(cmd));
+}
+
+static void __attribute__((unused)) BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber )
+{
+ uint8_t cmd[13];
+
+ uint16_t crc;
+ // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block
+ // followed by teh block data
+ // one sub-carrier, inventory, 1 slot, fast rate
+ cmd[0] = (1 << 6)| (1 << 5) | (1 << 1); // no SELECT bit
+ // READ BLOCK command code
+ cmd[1] = 0x20;
+ // UID may be optionally specified here
+ // 64-bit UID
+ cmd[2] = 0x32;
+ cmd[3]= 0x4b;
+ cmd[4] = 0x03;
+ cmd[5] = 0x01;
+ cmd[6] = 0x00;
+ cmd[7] = 0x10;
+ cmd[8] = 0x05;
+ cmd[9]= 0xe0; // always e0 (not exactly unique)
+ // Block number to read
+ cmd[10] = blockNumber;//0x00;
+ //Now the CRC
+ crc = Crc(cmd, 11); // the crc needs to be calculated over 2 bytes
+ cmd[11] = crc & 0xff;
+ cmd[12] = crc >> 8;
+
+ CodeIso15693AsReader(cmd, sizeof(cmd));
+}
+
+static void __attribute__((unused)) BuildReadMultiBlockRequest(uint8_t *uid)
+{
+ uint8_t cmd[14];
+
+ uint16_t crc;
+ // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block
+ // followed by teh block data
+ // one sub-carrier, inventory, 1 slot, fast rate
+ cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit
+ // READ Multi BLOCK command code
+ cmd[1] = 0x23;
+ // UID may be optionally specified here
+ // 64-bit UID
+ cmd[2] = 0x32;
+ cmd[3]= 0x4b;
+ cmd[4] = 0x03;
+ cmd[5] = 0x01;
+ cmd[6] = 0x00;
+ cmd[7] = 0x10;
+ cmd[8] = 0x05;
+ cmd[9]= 0xe0; // always e0 (not exactly unique)
+ // First Block number to read
+ cmd[10] = 0x00;
+ // Number of Blocks to read
+ cmd[11] = 0x2f; // read quite a few
+ //Now the CRC
+ crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
+ cmd[12] = crc & 0xff;
+ cmd[13] = crc >> 8;
+
+ CodeIso15693AsReader(cmd, sizeof(cmd));
+}
+
+static void __attribute__((unused)) BuildArbitraryRequest(uint8_t *uid,uint8_t CmdCode)
+{
+ uint8_t cmd[14];
+
+ uint16_t crc;
+ // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block
+ // followed by teh block data
+ // one sub-carrier, inventory, 1 slot, fast rate
+ cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit
+ // READ BLOCK command code
+ cmd[1] = CmdCode;
+ // UID may be optionally specified here
+ // 64-bit UID
+ cmd[2] = 0x32;
+ cmd[3]= 0x4b;
+ cmd[4] = 0x03;
+ cmd[5] = 0x01;
+ cmd[6] = 0x00;
+ cmd[7] = 0x10;
+ cmd[8] = 0x05;
+ cmd[9]= 0xe0; // always e0 (not exactly unique)
+ // Parameter
+ cmd[10] = 0x00;
+ cmd[11] = 0x0a;
+
+// cmd[12] = 0x00;
+// cmd[13] = 0x00; //Now the CRC
+ crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
+ cmd[12] = crc & 0xff;
+ cmd[13] = crc >> 8;
+
+ CodeIso15693AsReader(cmd, sizeof(cmd));
+}
+
+static void __attribute__((unused)) BuildArbitraryCustomRequest(uint8_t uid[], uint8_t CmdCode)
+{
+ uint8_t cmd[14];
+
+ uint16_t crc;
+ // If we set the Option_Flag in this request, the VICC will respond with the secuirty status of the block
+ // followed by teh block data
+ // one sub-carrier, inventory, 1 slot, fast rate
+ cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit
+ // READ BLOCK command code
+ cmd[1] = CmdCode;
+ // UID may be optionally specified here
+ // 64-bit UID
+ cmd[2] = 0x32;
+ cmd[3]= 0x4b;
+ cmd[4] = 0x03;
+ cmd[5] = 0x01;
+ cmd[6] = 0x00;
+ cmd[7] = 0x10;
+ cmd[8] = 0x05;
+ cmd[9]= 0xe0; // always e0 (not exactly unique)
+ // Parameter
+ cmd[10] = 0x05; // for custom codes this must be manufcturer code
+ cmd[11] = 0x00;
+
+// cmd[12] = 0x00;
+// cmd[13] = 0x00; //Now the CRC
+ crc = Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
+ cmd[12] = crc & 0xff;
+ cmd[13] = crc >> 8;
+
+ CodeIso15693AsReader(cmd, sizeof(cmd));
+}
+
+/////////////////////////////////////////////////////////////////////////
+// Now the VICC>VCD responses when we are simulating a tag
+////////////////////////////////////////////////////////////////////
+
+ static void BuildInventoryResponse(void)
+{
+ uint8_t cmd[12];
+
+ uint16_t crc;
+ // one sub-carrier, inventory, 1 slot, fast rate
+ // AFI is at bit 5 (1<<4) when doing an INVENTORY
+ cmd[0] = 0; //(1 << 2) | (1 << 5) | (1 << 1);
+ cmd[1] = 0;
+ // 64-bit UID
+ cmd[2] = 0x32;
+ cmd[3]= 0x4b;
+ cmd[4] = 0x03;
+ cmd[5] = 0x01;
+ cmd[6] = 0x00;
+ cmd[7] = 0x10;
+ cmd[8] = 0x05;
+ cmd[9]= 0xe0;
+ //Now the CRC
+ crc = Crc(cmd, 10);
+ cmd[10] = crc & 0xff;
+ cmd[11] = crc >> 8;
+
+ CodeIso15693AsReader(cmd, sizeof(cmd));
+}
+
+//-----------------------------------------------------------------------------
+// Transmit the command (to the tag) that was placed in ToSend[].
+//-----------------------------------------------------------------------------
+static void TransmitTo15693Tag(const uint8_t *cmd, int len, int *samples, int *wait)
+{
+ int c;
+
+// FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX);
+ if(*wait < 10) { *wait = 10; }
+
+// for(c = 0; c < *wait;) {
+// if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+// AT91C_BASE_SSC->SSC_THR = 0x00; // For exact timing!
+// c++;
+// }
+// if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+// volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
+// (void)r;
+// }
+// WDT_HIT();
+// }
+
+ c = 0;
+ for(;;) {
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ AT91C_BASE_SSC->SSC_THR = cmd[c];
+ c++;
+ if(c >= len) {
+ break;
+ }
+ }
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
+ (void)r;
+ }
+ WDT_HIT();
+ }
+ *samples = (c + *wait) << 3;
+}
+
+//-----------------------------------------------------------------------------
+// Transmit the command (to the reader) that was placed in ToSend[].
+//-----------------------------------------------------------------------------
+static void TransmitTo15693Reader(const uint8_t *cmd, int len, int *samples, int *wait)
+{
+ int c;
+
+// FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR); // No requirement to energise my coils
+ if(*wait < 10) { *wait = 10; }
+
+ c = 0;
+ for(;;) {
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ AT91C_BASE_SSC->SSC_THR = cmd[c];
+ c++;
+ if(c >= len) {
+ break;
+ }
+ }
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
+ (void)r;
+ }
+ WDT_HIT();
+ }
+ *samples = (c + *wait) << 3;
+}
+
+static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed)
+{
+ int c = 0;
+ uint8_t *dest = (uint8_t *)BigBuf;
+ int getNext = 0;
+
+ int8_t prev = 0;
+
+// NOW READ RESPONSE
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
+ //spindelay(60); // greg - experiment to get rid of some of the 0 byte/failed reads
+ c = 0;
+ getNext = FALSE;
+ for(;;) {
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ AT91C_BASE_SSC->SSC_THR = 0x43;
+ }
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ int8_t b;
+ b = (int8_t)AT91C_BASE_SSC->SSC_RHR;
+
+ // The samples are correlations against I and Q versions of the
+ // tone that the tag AM-modulates, so every other sample is I,
+ // every other is Q. We just want power, so abs(I) + abs(Q) is
+ // close to what we want.
+ if(getNext) {
+ int8_t r;
+
+ if(b < 0) {
+ r = -b;
+ } else {
+ r = b;
+ }
+ if(prev < 0) {
+ r -= prev;
+ } else {
+ r += prev;
+ }
+
+ dest[c++] = (uint8_t)r;
+
+ if(c >= 2000) {
+ break;
+ }
+ } else {
+ prev = b;
+ }
+
+ getNext = !getNext;
+ }
+ }
+
+//////////////////////////////////////////
+/////////// DEMODULATE ///////////////////
+//////////////////////////////////////////
+
+ int i, j;
+ int max = 0, maxPos=0;
+
+ int skip = 4;
+
+// if(GraphTraceLen < 1000) return; // THIS CHECKS FOR A BUFFER TO SMALL
+
+ // First, correlate for SOF
+ for(i = 0; i < 100; i++) {
+ int corr = 0;
+ for(j = 0; j < arraylen(FrameSOF); j += skip) {
+ corr += FrameSOF[j]*dest[i+(j/skip)];
+ }
+ if(corr > max) {
+ max = corr;
+ maxPos = i;
+ }
+ }
+// DbpString("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip));
+
+ int k = 0; // this will be our return value
+
+ // greg - If correlation is less than 1 then there's little point in continuing
+ if ((max/(arraylen(FrameSOF)/skip)) >= 1)
+ {
+
+ i = maxPos + arraylen(FrameSOF)/skip;
+
+ uint8_t outBuf[20];
+ memset(outBuf, 0, sizeof(outBuf));
+ uint8_t mask = 0x01;
+ for(;;) {
+ int corr0 = 0, corr1 = 0, corrEOF = 0;
+ for(j = 0; j < arraylen(Logic0); j += skip) {
+ corr0 += Logic0[j]*dest[i+(j/skip)];
+ }
+ for(j = 0; j < arraylen(Logic1); j += skip) {
+ corr1 += Logic1[j]*dest[i+(j/skip)];
+ }
+ for(j = 0; j < arraylen(FrameEOF); j += skip) {
+ corrEOF += FrameEOF[j]*dest[i+(j/skip)];
+ }
+ // Even things out by the length of the target waveform.
+ corr0 *= 4;
+ corr1 *= 4;
+
+ if(corrEOF > corr1 && corrEOF > corr0) {
+// DbpString("EOF at %d", i);
+ break;
+ } else if(corr1 > corr0) {
+ i += arraylen(Logic1)/skip;
+ outBuf[k] |= mask;
+ } else {
+ i += arraylen(Logic0)/skip;
+ }
+ mask <<= 1;
+ if(mask == 0) {
+ k++;
+ mask = 0x01;
+ }
+ if((i+(int)arraylen(FrameEOF)) >= 2000) {
+ DbpString("ran off end!");
+ break;
+ }
+ }
+ if(mask != 0x01) {
+ DbpString("error, uneven octet! (discard extra bits!)");
+/// DbpString(" mask=%02x", mask);
+ }
+// uint8_t str1 [8];
+// itoa(k,str1);
+// strcat(str1," octets read");
+
+// DbpString( str1); // DbpString("%d octets", k);
+
+// for(i = 0; i < k; i+=3) {
+// //DbpString("# %2d: %02x ", i, outBuf[i]);
+// DbpIntegers(outBuf[i],outBuf[i+1],outBuf[i+2]);
+// }
+
+ for(i = 0; i < k; i++) {
+ receivedResponse[i] = outBuf[i];
+ }
+ } // "end if correlation > 0" (max/(arraylen(FrameSOF)/skip))
+ return k; // return the number of bytes demodulated
+
+/// DbpString("CRC=%04x", Iso15693Crc(outBuf, k-2));
+
+}
+
+// Now the GetISO15693 message from sniffing command
+static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int *samples, int *elapsed)
+{
+ int c = 0;
+ uint8_t *dest = (uint8_t *)BigBuf;
+ int getNext = 0;
+
+ int8_t prev = 0;
+
+// NOW READ RESPONSE
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
+ //spindelay(60); // greg - experiment to get rid of some of the 0 byte/failed reads
+ c = 0;
+ getNext = FALSE;
+ for(;;) {
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ AT91C_BASE_SSC->SSC_THR = 0x43;
+ }
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ int8_t b;
+ b = (int8_t)AT91C_BASE_SSC->SSC_RHR;
+
+ // The samples are correlations against I and Q versions of the
+ // tone that the tag AM-modulates, so every other sample is I,
+ // every other is Q. We just want power, so abs(I) + abs(Q) is
+ // close to what we want.
+ if(getNext) {
+ int8_t r;
+
+ if(b < 0) {
+ r = -b;
+ } else {
+ r = b;
+ }
+ if(prev < 0) {
+ r -= prev;
+ } else {
+ r += prev;
+ }
+
+ dest[c++] = (uint8_t)r;
+
+ if(c >= 20000) {
+ break;
+ }
+ } else {
+ prev = b;
+ }
+
+ getNext = !getNext;
+ }
+ }
+
+//////////////////////////////////////////
+/////////// DEMODULATE ///////////////////
+//////////////////////////////////////////
+
+ int i, j;
+ int max = 0, maxPos=0;
+
+ int skip = 4;
+
+// if(GraphTraceLen < 1000) return; // THIS CHECKS FOR A BUFFER TO SMALL
+
+ // First, correlate for SOF
+ for(i = 0; i < 19000; i++) {
+ int corr = 0;
+ for(j = 0; j < arraylen(FrameSOF); j += skip) {
+ corr += FrameSOF[j]*dest[i+(j/skip)];
+ }
+ if(corr > max) {
+ max = corr;
+ maxPos = i;
+ }
+ }
+// DbpString("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip));
+
+ int k = 0; // this will be our return value
+
+ // greg - If correlation is less than 1 then there's little point in continuing
+ if ((max/(arraylen(FrameSOF)/skip)) >= 1) // THIS SHOULD BE 1
+ {
+
+ i = maxPos + arraylen(FrameSOF)/skip;
+
+ uint8_t outBuf[20];
+ memset(outBuf, 0, sizeof(outBuf));
+ uint8_t mask = 0x01;
+ for(;;) {
+ int corr0 = 0, corr1 = 0, corrEOF = 0;
+ for(j = 0; j < arraylen(Logic0); j += skip) {
+ corr0 += Logic0[j]*dest[i+(j/skip)];
+ }
+ for(j = 0; j < arraylen(Logic1); j += skip) {
+ corr1 += Logic1[j]*dest[i+(j/skip)];
+ }
+ for(j = 0; j < arraylen(FrameEOF); j += skip) {
+ corrEOF += FrameEOF[j]*dest[i+(j/skip)];
+ }
+ // Even things out by the length of the target waveform.
+ corr0 *= 4;
+ corr1 *= 4;
+
+ if(corrEOF > corr1 && corrEOF > corr0) {
+// DbpString("EOF at %d", i);
+ break;
+ } else if(corr1 > corr0) {
+ i += arraylen(Logic1)/skip;
+ outBuf[k] |= mask;
+ } else {
+ i += arraylen(Logic0)/skip;
+ }
+ mask <<= 1;
+ if(mask == 0) {
+ k++;
+ mask = 0x01;
+ }
+ if((i+(int)arraylen(FrameEOF)) >= 2000) {
+ DbpString("ran off end!");
+ break;
+ }
+ }
+ if(mask != 0x01) {
+ DbpString("error, uneven octet! (discard extra bits!)");
+/// DbpString(" mask=%02x", mask);
+ }
+// uint8_t str1 [8];
+// itoa(k,str1);
+// strcat(str1," octets read");
+
+// DbpString( str1); // DbpString("%d octets", k);
+
+// for(i = 0; i < k; i+=3) {
+// //DbpString("# %2d: %02x ", i, outBuf[i]);
+// DbpIntegers(outBuf[i],outBuf[i+1],outBuf[i+2]);
+// }
+
+ for(i = 0; i < k; i++) {
+ receivedResponse[i] = outBuf[i];
+ }
+ } // "end if correlation > 0" (max/(arraylen(FrameSOF)/skip))
+ return k; // return the number of bytes demodulated
+
+/// DbpString("CRC=%04x", Iso15693Crc(outBuf, k-2));
+}
+
+//-----------------------------------------------------------------------------
+// Start to read an ISO 15693 tag. We send an identify request, then wait
+// for the response. The response is not demodulated, just left in the buffer
+// so that it can be downloaded to a PC and processed there.
+//-----------------------------------------------------------------------------
+void AcquireRawAdcSamplesIso15693(void)
+{
+ int c = 0;
+ uint8_t *dest = (uint8_t *)BigBuf;
+ int getNext = 0;
+
+ int8_t prev = 0;
+
+ BuildIdentifyRequest();
+
+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+
+ // Give the tags time to energize
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
+ SpinDelay(100);
+
+ // Now send the command
+ FpgaSetupSsc();
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX);
+
+ c = 0;
+ for(;;) {
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ AT91C_BASE_SSC->SSC_THR = ToSend[c];
+ c++;
+ if(c == ToSendMax+3) {
+ break;
+ }
+ }
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ volatile uint32_t r = AT91C_BASE_SSC->SSC_RHR;
+ (void)r;
+ }
+ WDT_HIT();
+ }
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
+
+ c = 0;
+ getNext = FALSE;
+ for(;;) {
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+ AT91C_BASE_SSC->SSC_THR = 0x43;
+ }
+ if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+ int8_t b;
+ b = (int8_t)AT91C_BASE_SSC->SSC_RHR;
+
+ // The samples are correlations against I and Q versions of the
+ // tone that the tag AM-modulates, so every other sample is I,
+ // every other is Q. We just want power, so abs(I) + abs(Q) is
+ // close to what we want.
+ if(getNext) {
+ int8_t r;
+
+ if(b < 0) {
+ r = -b;
+ } else {
+ r = b;
+ }
+ if(prev < 0) {
+ r -= prev;
+ } else {
+ r += prev;
+ }
+
+ dest[c++] = (uint8_t)r;
+
+ if(c >= 2000) {
+ break;
+ }
+ } else {
+ prev = b;
+ }
+
+ getNext = !getNext;
+ }
+ }
+}
+
+//-----------------------------------------------------------------------------
+// Simulate an ISO15693 reader, perform anti-collision and then attempt to read a sector
+// all demodulation performed in arm rather than host. - greg
+//-----------------------------------------------------------------------------
+void ReaderIso15693(uint32_t parameter)
+{
+ LED_A_ON();
+ LED_B_ON();
+ LED_C_OFF();
+ LED_D_OFF();
+
+//DbpString(parameter);
+
+ //uint8_t *answer0 = (((uint8_t *)BigBuf) + 3560); // allow 100 bytes per reponse (way too much)
+ uint8_t *answer1 = (((uint8_t *)BigBuf) + 3660); //
+ uint8_t *answer2 = (((uint8_t *)BigBuf) + 3760);
+ uint8_t *answer3 = (((uint8_t *)BigBuf) + 3860);
+ //uint8_t *TagUID= (((uint8_t *)BigBuf) + 3960); // where we hold the uid for hi15reader
+// int answerLen0 = 0;
+ int answerLen1 = 0;
+ int answerLen2 = 0;
+ int answerLen3 = 0;
+
+ // Blank arrays
+ memset(BigBuf + 3660, 0, 300);
+
+ // Setup SSC
+ FpgaSetupSsc();
+
+ // Start from off (no field generated)
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ SpinDelay(200);
+
+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+ FpgaSetupSsc();
+
+ // Give the tags time to energize
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
+ SpinDelay(200);
+
+ LED_A_ON();
+ LED_B_OFF();
+ LED_C_OFF();
+ LED_D_OFF();
+
+ int samples = 0;
+ int tsamples = 0;
+ int wait = 0;
+ int elapsed = 0;
+
+ // FIRST WE RUN AN INVENTORY TO GET THE TAG UID
+ // THIS MEANS WE CAN PRE-BUILD REQUESTS TO SAVE CPU TIME
+ uint8_t TagUID[7]; // where we hold the uid for hi15reader
+
+// BuildIdentifyRequest();
+// //TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);
+// TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
+// // Now wait for a response
+// responseLen0 = GetIso15693AnswerFromTag(receivedAnswer0, 100, &samples, &elapsed) ;
+// if (responseLen0 >=12) // we should do a better check than this
+// {
+// // really we should check it is a valid mesg
+// // but for now just grab what we think is the uid
+// TagUID[0] = receivedAnswer0[2];
+// TagUID[1] = receivedAnswer0[3];
+// TagUID[2] = receivedAnswer0[4];
+// TagUID[3] = receivedAnswer0[5];
+// TagUID[4] = receivedAnswer0[6];
+// TagUID[5] = receivedAnswer0[7];
+// TagUID[6] = receivedAnswer0[8]; // IC Manufacturer code
+// DbpIntegers(TagUID[6],TagUID[5],TagUID[4]);
+//}
+
+ // Now send the IDENTIFY command
+ BuildIdentifyRequest();
+ //TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);
+ TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
+ // Now wait for a response
+ answerLen1 = GetIso15693AnswerFromTag(answer1, 100, &samples, &elapsed) ;
+
+ if (answerLen1 >=12) // we should do a better check than this
+ {
+
+ TagUID[0] = answer1[2];
+ TagUID[1] = answer1[3];
+ TagUID[2] = answer1[4];
+ TagUID[3] = answer1[5];
+ TagUID[4] = answer1[6];
+ TagUID[5] = answer1[7];
+ TagUID[6] = answer1[8]; // IC Manufacturer code
+
+ // Now send the SELECT command
+ BuildSelectRequest(TagUID);
+ TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
+ // Now wait for a response
+ answerLen2 = GetIso15693AnswerFromTag(answer2, 100, &samples, &elapsed);
+
+ // Now send the MULTI READ command
+// BuildArbitraryRequest(*TagUID,parameter);
+ BuildArbitraryCustomRequest(TagUID,parameter);
+// BuildReadBlockRequest(*TagUID,parameter);
+// BuildSysInfoRequest(*TagUID);
+ //TransmitTo15693Tag(ToSend,ToSendMax+3,&tsamples, &wait);
+ TransmitTo15693Tag(ToSend,ToSendMax,&tsamples, &wait); // No longer ToSendMax+3
+ // Now wait for a response
+ answerLen3 = GetIso15693AnswerFromTag(answer3, 100, &samples, &elapsed) ;
+
+ }
+
+ Dbprintf("%d octets read from IDENTIFY request: %x %x %x %x %x %x %x %x %x", answerLen1,
+ answer1[0], answer1[1], answer1[2],
+ answer1[3], answer1[4], answer1[5],
+ answer1[6], answer1[7], answer1[8]);
+
+ Dbprintf("%d octets read from SELECT request: %x %x %x %x %x %x %x %x %x", answerLen2,
+ answer2[0], answer2[1], answer2[2],
+ answer2[3], answer2[4], answer2[5],
+ answer2[6], answer2[7], answer2[8]);
+
+ Dbprintf("%d octets read from XXX request: %x %x %x %x %x %x %x %x %x", answerLen3,
+ answer3[0], answer3[1], answer3[2],
+ answer3[3], answer3[4], answer3[5],
+ answer3[6], answer3[7], answer3[8]);
+
+
+// str2[0]=0;
+// for(i = 0; i < responseLen3; i++) {
+// itoa(str1,receivedAnswer3[i]);
+// strcat(str2,str1);
+// }
+// DbpString(str2);
+
+ LED_A_OFF();
+ LED_B_OFF();
+ LED_C_OFF();
+ LED_D_OFF();
+}
+
+//-----------------------------------------------------------------------------
+// Simulate an ISO15693 TAG, perform anti-collision and then print any reader commands
+// all demodulation performed in arm rather than host. - greg
+//-----------------------------------------------------------------------------
+void SimTagIso15693(uint32_t parameter)
+{
+ LED_A_ON();
+ LED_B_ON();
+ LED_C_OFF();
+ LED_D_OFF();
+
+ uint8_t *answer1 = (((uint8_t *)BigBuf) + 3660); //
+ int answerLen1 = 0;
+
+ // Blank arrays
+ memset(answer1, 0, 100);
+
+ // Setup SSC
+ FpgaSetupSsc();
+
+ // Start from off (no field generated)
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ SpinDelay(200);
+
+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+ FpgaSetupSsc();
+
+ // Give the tags time to energize
+// FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); // NO GOOD FOR SIM TAG!!!!
+ SpinDelay(200);
+
+ LED_A_OFF();
+ LED_B_OFF();
+ LED_C_ON();
+ LED_D_OFF();
+
+ int samples = 0;
+ int tsamples = 0;
+ int wait = 0;
+ int elapsed = 0;
+
+ answerLen1 = GetIso15693AnswerFromSniff(answer1, 100, &samples, &elapsed) ;
+
+ if (answerLen1 >=1) // we should do a better check than this
+ {
+ // Build a suitable reponse to the reader INVENTORY cocmmand
+ BuildInventoryResponse();
+ TransmitTo15693Reader(ToSend,ToSendMax, &tsamples, &wait);
+ }
+
+ Dbprintf("%d octets read from reader command: %x %x %x %x %x %x %x %x %x", answerLen1,
+ answer1[0], answer1[1], answer1[2],
+ answer1[3], answer1[4], answer1[5],
+ answer1[6], answer1[7], answer1[8]);
+
+ LED_A_OFF();
+ LED_B_OFF();
+ LED_C_OFF();
+ LED_D_OFF();
+}
projects / proxmark3-svn / blobdiff