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1 // Copyright (C) 2014
2 //
3 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
4 // at your option, any later version. See the LICENSE.txt file for the text of
5 // the license.
6 //-----------------------------------------------------------------------------
7 // Low frequency demod related commands
8 // marshmellow
9 // note that many of these demods are not the slickest code and they often rely
10 // on peaks and clock instead of converting to clean signal.
11 //
12 //-----------------------------------------------------------------------------
13
14 #ifndef LFDEMOD_H__
15 #define LFDEMOD_H__
16 #include <stdint.h> // for uint_32+
17 #include <stdbool.h> // for bool
18
19 //generic
20 extern size_t addParity(uint8_t *BitSource, uint8_t *dest, uint8_t sourceLen, uint8_t pLen, uint8_t pType);
21 extern int askdemod(uint8_t *BinStream, size_t *size, int *clk, int *invert, int maxErr, uint8_t amp, uint8_t askType);
22 extern int askdemod_ext(uint8_t *BinStream, size_t *size, int *clk, int *invert, int maxErr, uint8_t amp, uint8_t askType, int *startIdx);
23 extern void askAmp(uint8_t *BitStream, size_t size);
24 extern int BiphaseRawDecode(uint8_t * BitStream, size_t *size, int offset, int invert);
25 extern uint32_t bytebits_to_byte(uint8_t* src, size_t numbits);
26 extern uint32_t bytebits_to_byteLSBF(uint8_t* src, size_t numbits);
27 extern uint16_t countFC(uint8_t *BitStream, size_t size, uint8_t fskAdj);
28 extern int DetectASKClock(uint8_t dest[], size_t size, int *clock, int maxErr);
29 extern uint8_t DetectCleanAskWave(uint8_t dest[], size_t size, uint8_t high, uint8_t low);
30 extern uint8_t detectFSKClk(uint8_t *BitStream, size_t size, uint8_t fcHigh, uint8_t fcLow);
31 extern uint8_t detectFSKClk_ext(uint8_t *BitStream, size_t size, uint8_t fcHigh, uint8_t fcLow, int *firstClockEdge);
32 extern int DetectNRZClock(uint8_t dest[], size_t size, int clock, size_t *clockStartIdx);
33 extern int DetectPSKClock(uint8_t dest[], size_t size, int clock);
34 extern int DetectPSKClock_ext(uint8_t dest[], size_t size, int clock, int *firstPhaseShift);
35 extern int DetectStrongAskClock(uint8_t dest[], size_t size, int high, int low, int *clock);
36 extern bool DetectST(uint8_t buffer[], size_t *size, int *foundclock);
37 extern bool DetectST_ext(uint8_t buffer[], size_t *size, int *foundclock, size_t *ststart, size_t *stend);
38 extern int fskdemod(uint8_t *dest, size_t size, uint8_t rfLen, uint8_t invert, uint8_t fchigh, uint8_t fclow);
39 extern int fskdemod_ext(uint8_t *dest, size_t size, uint8_t rfLen, uint8_t invert, uint8_t fchigh, uint8_t fclow, int *startIdx);
40 extern int getHiLo(uint8_t *BitStream, size_t size, int *high, int *low, uint8_t fuzzHi, uint8_t fuzzLo);
41 extern uint32_t manchesterEncode2Bytes(uint16_t datain);
42 extern int ManchesterEncode(uint8_t *BitStream, size_t size);
43 extern int manrawdecode(uint8_t *BitStream, size_t *size, uint8_t invert, uint8_t *alignPos);
44 extern int nrzRawDemod(uint8_t *dest, size_t *size, int *clk, int *invert, int *startIdx);
45 extern uint8_t parityTest(uint32_t bits, uint8_t bitLen, uint8_t pType);
46 extern uint8_t preambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_t *size, size_t *startIdx);
47 extern bool preambleSearchEx(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_t *size, size_t *startIdx, bool findone);
48 extern int pskRawDemod(uint8_t dest[], size_t *size, int *clock, int *invert);
49 extern int pskRawDemod_ext(uint8_t dest[], size_t *size, int *clock, int *invert, int *startIdx);
50 extern void psk2TOpsk1(uint8_t *BitStream, size_t size);
51 extern void psk1TOpsk2(uint8_t *BitStream, size_t size);
52 extern size_t removeParity(uint8_t *BitStream, size_t startIdx, uint8_t pLen, uint8_t pType, size_t bLen);
53
54 //tag specific
55 extern int AWIDdemodFSK(uint8_t *dest, size_t *size);
56 extern uint8_t Em410xDecode(uint8_t *BitStream, size_t *size, size_t *startIdx, uint32_t *hi, uint64_t *lo);
57 extern int FDXBdemodBI(uint8_t *dest, size_t *size);
58 extern int gProxII_Demod(uint8_t BitStream[], size_t *size);
59 extern int HIDdemodFSK(uint8_t *dest, size_t *size, uint32_t *hi2, uint32_t *hi, uint32_t *lo);
60 extern int IOdemodFSK(uint8_t *dest, size_t size);
61 extern int indala26decode(uint8_t *bitStream, size_t *size, uint8_t *invert);
62 extern int ParadoxdemodFSK(uint8_t *dest, size_t *size, uint32_t *hi2, uint32_t *hi, uint32_t *lo);
63 extern int PrescoDemod(uint8_t *dest, size_t *size);
64 extern int PyramiddemodFSK(uint8_t *dest, size_t *size);
65 extern int VikingDemod_AM(uint8_t *dest, size_t *size);
66 extern int Visa2kDemod_AM(uint8_t *dest, size_t *size);
67
68 #endif
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