X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/cf194819cc71d7e0121e896e71989efc6dbfc280..fd4f21b766a715303f0b1436c9970f5965e644dc:/common/lfdemod.c

diff --git a/common/lfdemod.c b/common/lfdemod.c
index cf11b25b..a6e979a2 100644
--- a/common/lfdemod.c
+++ b/common/lfdemod.c
@@ -260,11 +260,14 @@ 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;
 }