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ADD: next step ISO11784/85

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iceman1001 2015-06-03 21:35:03 +02:00
commit 0df669a298
2 changed files with 62 additions and 23 deletions
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15
common/lfdemod.c
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@ -590,22 +590,17 @@ 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*50) return -1;
if (*size < 128) return -1;
if (justNoise(dest, *size)) return -2;
// FSK demodulator
*size = fskdemod(dest, *size, 50, 1, 10, 8); // fsk2a RF/50
if (*size < 96) return -3; //did we get a good demod?
uint8_t preamble[] = {0,0,0,0,0,0,0,0,0,0,1};
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 -4; //preamble not found
if (*size != 128) return -5;
if (errChk == 0) return -2; //preamble not found
return (int)startIdx;
}