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a little cleanup

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This commit is contained in:
marshmellow42 2017-02-19 20:47:45 -05:00
commit 4c6ccc2b04
3 changed files with 60 additions and 73 deletions
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17
common/lfdemod.c
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@ -170,6 +170,23 @@ uint8_t preambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_
return 0;
}
// search for given preamble in given BitStream and return success=1 or fail=0 and startIndex (where it was found)
// does not look for a repeating preamble
// em4x05/4x69 only sends preamble once, so look for it once in the first pLen bits
// leave it generic so it could be reused later...
bool onePreambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_t size, size_t *startIdx) {
// Sanity check. If preamble length is bigger than bitstream length.
if ( size <= pLen ) return false;
for (size_t idx = 0; idx < size - pLen; idx++) {
if (memcmp(BitStream+idx, preamble, pLen) == 0) {
if (g_debugMode) prnt("DEBUG: preamble found at %u", idx);
*startIdx = idx;
return true;
}
}
return false;
}
//by marshmellow
//takes 1s and 0s and searches for EM410x format - output EM ID
uint8_t Em410xDecode(uint8_t *BitStream, size_t *size, size_t *startIdx, uint32_t *hi, uint64_t *lo)

1
common/lfdemod.h
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@ -39,6 +39,7 @@ int manrawdecode(uint8_t *BitStream, size_t *size, uint8_t invert);
int nrzRawDemod(uint8_t *dest, size_t *size, int *clk, int *invert);
uint8_t parityTest(uint32_t bits, uint8_t bitLen, uint8_t pType);
uint8_t preambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_t *size, size_t *startIdx);
bool onePreambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_t size, size_t *startIdx);
int pskRawDemod(uint8_t dest[], size_t *size, int *clock, int *invert);
void psk2TOpsk1(uint8_t *BitStream, size_t size);
void psk1TOpsk2(uint8_t *BitStream, size_t size);