Testing animal tags

client/cmddata.c

@@ -40,7 +40,7 @@ void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
 		size = MAX_DEMOD_BUF_LEN;
 
 	size_t i = 0;
-	for (; i < size; i++){
+for (; i < size; i++){
 		DemodBuffer[i]=buff[startIdx++];
 	}
 	DemodBufferLen=size;
@@ -500,7 +500,7 @@ int ASKbiphaseDemod(const char *Cmd, bool verbose)
 	int offset=0, clk=0, invert=0, maxErr=0, ans=0;
 	ans = sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
 	if (ans>0)
-		ans = ASKDemod(Cmd+1, FALSE, FALSE, 0);
+		ans = ASKDemod(Cmd+2, FALSE, FALSE, 0);
 	else
 		ans = ASKDemod(Cmd, FALSE, FALSE, 0);
 	if (!ans) {
@@ -1457,6 +1457,83 @@ int CmdFSKdemodPyramid(const char *Cmd)
 	return 1;
 }
 
+// ISO11784/85 demod  (aka animal tag)  BIPHASE, inverted, rf/32,  with preamble of 00000000001 (128bits)
+// 8 databits + 1 parity (1)
+// CIITT 16 chksum
+// NATIONAL CODE, ICAR database
+// COUNTRY CODE (ISO3166) 
+// FLAG (animal/non-animal)
+int CmdIso11784demodBI(const char *Cmd){
+
+	int invert = 1;
+	int clk = 32;		
+	int errCnt = 0;
+	int maxErr = 0;
+	uint8_t BitStream[MAX_DEMOD_BUF_LEN];	
+	size_t size = getFromGraphBuf(BitStream);	
+	
+	errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
+	if ( errCnt < 0 || errCnt > maxErr ) { 
+		if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: 32", errCnt);
+		return 0;
+	}
+
+	errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
+	if (errCnt < 0 || errCnt > maxErr ) {
+		if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
+		return 0;
+	} 
+
+	int preambleIndex = ISO11784demodBI(BitStream, &size);
+	if (preambleIndex < 0){
+		if (g_debugMode) PrintAndLog("Error ISO11784Demod , no startmarker found :: %d",preambleIndex);
+		return 0;
+	}
+
+	setDemodBuf(BitStream, 128, preambleIndex);
+	//printDemodBuff();
+
+	size = removeParity(BitStream, preambleIndex + 11, 9, 1, 117);
+	if ( size <= 0 ) {
+		if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
+		return 0;
+	}
+	PrintAndLog("startmarker %d;   Size %d", preambleIndex, size);
+
+	//return 1;
+	//got a good demod
+	uint32_t NationalCodeA = bytebits_to_byteLSBF(BitStream,32);
+	uint32_t NationalCodeB = bytebits_to_byteLSBF(BitStream+32,6);
+	uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
+	uint8_t dataBlockBit = BitStream[48];
+	uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
+	uint8_t animalBit = BitStream[63];
+	uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
+	uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
+
+	PrintAndLog("NationalCode: %x%08x",NationalCodeB,NationalCodeA);
+	//add rest of print code here...
+	/*
+	uint8_t ByteStream[16] = {0x00};
+	uint8_t bitCnt = 0;
+	uint8_t ByteCnt = 0;
+	size_t startIdx = preambleIndex + 11; //start after preamble
+	for (size_t idx = 0; idx < size-11; idx++){
+
+		//lsb first
+		ByteStream[ByteCnt] = ByteStream[ByteCnt] | (BitStream[startIdx+idx] << bitCnt);
+		bitCnt++;
+		if (bitCnt % 8 == 0){
+			if (g_debugMode) PrintAndLog("byte %d: %02x", ByteCnt, ByteStream[ByteCnt]);
+			bitCnt = 0;
+			ByteCnt++;
+		}
+	}
+	*/
+	return 1;
+}
+
+
 //by marshmellow
 //attempt to psk1 demod graph buffer
 int PSKDemod(const char *Cmd, bool verbose)

common/lfdemod.c

@@ -537,6 +537,18 @@ uint32_t bytebits_to_byte(uint8_t* src, size_t numbits)
 	return num;
 }
 
+//least significant bit first
+uint32_t bytebits_to_byteLSBF(uint8_t* src, size_t numbits)
+{
+	uint32_t num = 0;
+	for(int i = 0 ; i < numbits ; i++)
+	{
+		num = (num << 1) | (*src);
+		src++;
+	}
+	return num;
+}
+
 int IOdemodFSK(uint8_t *dest, size_t size)
 {
 	if (justNoise(dest, size)) return -1;
@@ -590,6 +602,21 @@ size_t removeParity(uint8_t *BitStream, size_t startIdx, uint8_t pLen, uint8_t p
 	return bitCnt;
 }
 
+// Ask/Biphase Demod then try to locate an ISO 11784/85 ID
+// BitStream must contain previously askrawdemod and biphasedemoded data
+int ISO11784demodBI(uint8_t *dest, size_t *size)
+{
+	//make sure buffer has enough data
+	if (*size < 128) return -1;
+
+	size_t startIdx = 0;
+	uint8_t preamble[] = {0,0,0,0,0,0,0,0,0,0,1};
+
+	uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
+	if (errChk == 0) return -2; //preamble not found
+	return (int)startIdx;
+}
+
 // by marshmellow
 // FSK Demod then try to locate an AWID ID
 int AWIDdemodFSK(uint8_t *dest, size_t *size)

common/lfdemod.h

@@ -19,6 +19,7 @@
 int      askdemod(uint8_t *BinStream, size_t *size, int *clk, int *invert, int maxErr, uint8_t amp, uint8_t askType);
 int      BiphaseRawDecode(uint8_t * BitStream, size_t *size, int offset, int invert);
 uint32_t bytebits_to_byte(uint8_t* src, size_t numbits);
+uint32_t bytebits_to_byteLSBF(uint8_t* src, size_t numbits);
 uint16_t countFC(uint8_t *BitStream, size_t size, uint8_t fskAdj);
 int      DetectASKClock(uint8_t dest[], size_t size, int *clock, int maxErr);
 uint8_t  DetectCleanAskWave(uint8_t dest[], size_t size, uint8_t high, uint8_t low);