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ADD: 'lf search' - added a rudimentary identification of IDTECK tags, will demod to PSK1, if fails it tries to PSK1 inverted demod.

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iceman1001 2017-01-12 00:04:36 +01:00
commit 3acac886bc
7 changed files with 80 additions and 3 deletions
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13
common/lfdemod.c
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@ -822,6 +822,19 @@ int NedapDemod(uint8_t *dest, size_t *size) {
return (int) startIdx;
}
// Find IDTEC PSK1, RF Preamble == 0x4944544B, Demodsize 64bits
// by iceman
int IdteckDemodPSK(uint8_t *dest, size_t *size) {
//make sure buffer has data
if (*size < 64*2) return -1;
size_t startIdx = 0;
uint8_t preamble[] = {0,1,0,0,1,0,0,1,0,1,0,0,0,1,0,0,0,1,0,1,0,1,0,0,0,1,0,0,1,0,1,1};
uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
if (errChk == 0) return -2; //preamble not found
if (*size != 64) return -3; // wrong demoded size
return (int) startIdx;
}
// by marshmellow
// to detect a wave that has heavily clipped (clean) samples
uint8_t DetectCleanAskWave(uint8_t dest[], size_t size, uint8_t high, uint8_t low)