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Add CCITT Kermit CRC check for FDX-B demod

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This commit is contained in:
marshmellow42 2015-06-04 12:53:19 -04:00
commit 6eaa8da9dc
3 changed files with 51 additions and 26 deletions
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16
client/cmddata.c
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@ -23,6 +23,7 @@
#include "lfdemod.h"
#include "usb_cmd.h"
#include "crc.h"
#include "crc16.h"
uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
uint8_t g_debugMode;
@ -1501,9 +1502,10 @@ int CmdFDXBdemodBI(const char *Cmd){
if (g_debugMode) {
char *bin = sprint_bin_break(BitStream,size,16);
PrintAndLog("DEBUG BinStream:\n%s",bin);
PrintAndLog("0x%s", sprint_hex(BitStream,16));
}
PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
if (g_debugMode) PrintAndLog("startmarker %d; Size %d", preambleIndex, size);
if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
//return 1;
//got a good demod
@ -1515,14 +1517,22 @@ int CmdFDXBdemodBI(const char *Cmd){
uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
uint64_t rawid = ((uint64_t)bytebits_to_byteLSBF(BitStream,32)<<32) | bytebits_to_byteLSBF(BitStream+32,32);
uint8_t raw[8];
num_to_bytes(rawid, 8, raw);
uint8_t *ID = SwapEndian64(raw, 8, 4);
if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(ID,8));
uint16_t calcCrc = crc16_ccitt_kermit(ID, 8);
PrintAndLog("Animal ID: %u-%012llu", countryCode, NationalCode);
PrintAndLog("National Code: %012llu", NationalCode);
PrintAndLog("CountryCode: %u", countryCode);
PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
PrintAndLog("reserved Code: %u", reservedCode);
PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
PrintAndLog("CRC: 0x%02X", crc16);
PrintAndLog("Extended: 0x%X", extended);
PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
PrintAndLog("Extended: 0x%X\n", extended);
return 1;
}