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finish gProxII_Demod

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marshmellow42 2015-03-03 16:20:18 -05:00
parent 40b9bb85e6
commit 11081e0459
2 changed files with 23 additions and 1 deletions
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23
common/lfdemod.c
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@ -354,7 +354,6 @@ void askAmp(uint8_t *BitStream, size_t size)
//by marshmellow
//takes 3 arguments - clock, invert and maxErr as integers
//attempts to demodulate ask only
//prints binary found and saves in graphbuffer for further commands
int askrawdemod(uint8_t *BinStream, size_t *size, int *clk, int *invert, int maxErr, uint8_t amp)
{
uint32_t i;
@ -501,6 +500,28 @@ int askrawdemod(uint8_t *BinStream, size_t *size, int *clk, int *invert, int max
}
return bestErrCnt;
}
// demod gProxIIDemod
// error returns as -x
// success returns start position in BitStream
// BitStream must contain previously askrawdemod and biphasedemoded data
int gProxII_Demod(uint8_t BitStream[], size_t *size)
{
size_t startIdx=0;
uint8_t preamble[] = {1,1,1,1,1,0};
uint8_t errChk = preambleSearch(BitStream, preamble, sizeof(preamble), size, &startIdx);
if (errChk == 0) return -3; //preamble not found
if (*size != 96) return -2; //should have found 96 bits
//check first 6 spacer bits to verify format
if (!BitStream[startIdx+5] && !BitStream[startIdx+10] && !BitStream[startIdx+15] && !BitStream[startIdx+20] && !BitStream[startIdx+25] && !BitStream[startIdx+30]){
//confirmed proper separator bits found
//return start position
return (int) startIdx;
}
return -5;
}
//translate wave to 11111100000 (1 for each short wave 0 for each long wave)
size_t fsk_wave_demod(uint8_t * dest, size_t size, uint8_t fchigh, uint8_t fclow)
{

1
common/lfdemod.h
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@ -22,6 +22,7 @@ int ManchesterEncode(uint8_t *BitStream, size_t size);
int manrawdecode(uint8_t *BitStream, size_t *size);
int BiphaseRawDecode(uint8_t * BitStream, size_t *size, int offset, int invert);
int askrawdemod(uint8_t *BinStream, size_t *size, int *clk, int *invert, int maxErr, uint8_t amp);
int gProxII_Demod(uint8_t BitStream[], size_t *size);
int HIDdemodFSK(uint8_t *dest, size_t *size, uint32_t *hi2, uint32_t *hi, uint32_t *lo);
int IOdemodFSK(uint8_t *dest, size_t size);
int fskdemod(uint8_t *dest, size_t size, uint8_t rfLen, uint8_t invert, uint8_t fchigh, uint8_t fclow);