ADD: started with a NEDAP demod, read, clone and sim functionality.

[proxmark3-svn] / common / lfdemod.c

diff --git a/common/lfdemod.c b/common/lfdemod.c
index f27ffff35c119f158cad162d89ed60bf6762952f..3bc246a3e20b5831f01764ac51ee94ee100c2330 100644 (file)
--- a/common/lfdemod.c
+++ b/common/lfdemod.c
@@ -764,6 +764,18 @@ int PyramiddemodFSK(uint8_t *dest, size_t *size)
        return (int)startIdx;
 }
 
+// find presco preamble 0x10D in already demoded data
+int NedapDemod(uint8_t *dest, size_t *size) {
+       //make sure buffer has data
+       if (*size < 128) return -3;
+       size_t startIdx = 0;
+       uint8_t preamble[] = {1,1,1,1,1,1,1,1,1,0};
+       uint8_t errChk = preambleSearch(dest, preamble, sizeof(preamble), size, &startIdx);
+       if (errChk == 0) return -4; //preamble not found
+       //return start position
+       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)