X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/c0d32c3186e5b11cf13394b10770cc1b6abab83f..d1057e7a2105d5e2696df185482176f22a5bd669:/common/lfdemod.c

diff --git a/common/lfdemod.c b/common/lfdemod.c
index cf11b25b..7d40df3a 100644
--- a/common/lfdemod.c
+++ b/common/lfdemod.c
@@ -81,10 +81,9 @@ size_t removeParity(uint8_t *BitStream, size_t startIdx, uint8_t pLen, uint8_t p
 		j--; // overwrite parity with next data
 		// if parity fails then return 0
 		switch (pType) {
-			case 3: if (BitStream[j]==1) return 0; break; //should be 0 spacer bit
-			case 2: if (BitStream[j]==0) return 0; break; //should be 1 spacer bit
-			default: //test parity
-				if (parityTest(parityWd, pLen, pType) == 0) return 0; break;
+			case 3: if (BitStream[j]==1) {return 0;} break; //should be 0 spacer bit
+			case 2: if (BitStream[j]==0) {return 0;} break; //should be 1 spacer bit
+			default: if (parityTest(parityWd, pLen, pType) == 0) {return 0;} break; //test parity
 		}
 		bitCnt+=(pLen-1);
 		parityWd = 0;
@@ -260,11 +259,14 @@ int cleanAskRawDemod(uint8_t *BinStream, size_t *size, int clk, int invert, int
 //by marshmellow
 void askAmp(uint8_t *BitStream, size_t size)
 {
+	uint8_t Last = 128;
 	for(size_t i = 1; i<size; i++){
 		if (BitStream[i]-BitStream[i-1]>=30) //large jump up
-			BitStream[i]=255;
-		else if(BitStream[i]-BitStream[i-1]<=-20) //large jump down
-			BitStream[i]=0;
+			Last = 255;
+		else if(BitStream[i-1]-BitStream[i]>=20) //large jump down
+			Last = 0;
+
+		BitStream[i-1] = Last;
 	}
 	return;
 }