From 49bbc60af37da26b73c71f4ff774841fc2290b72 Mon Sep 17 00:00:00 2001
From: marshmellow42 <marshmellowrf@gmail.com>
Date: Tue, 7 Apr 2015 00:53:06 -0400
Subject: [PATCH] lf cleaning++

data askedgedetect - removed unneeded code
lf em em4x50read bug fix / error checking
graph-save/restore auto repaint after restore.
---
 client/cmddata.c   | 17 ++++-------------
 client/cmdlfem4x.c | 31 +++++++++++++++++++------------
 client/graph.c     |  3 ++-
 3 files changed, 25 insertions(+), 26 deletions(-)

diff --git a/client/cmddata.c b/client/cmddata.c
index 18b59f21..d838abd1 100644
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -850,23 +850,14 @@ int CmdAskEdgeDetect(const char *Cmd)
 	int thresLen = 25;
 	sscanf(Cmd, "%i", &thresLen); 
 	int shift = 127;
-	int shiftedVal=0;
+
 	for(int i = 1; i<GraphTraceLen; i++){
 		if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
-			shift=127;
+			GraphBuffer[i-1] = 127;
 		else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
-			shift=-127;
-
-		shiftedVal=GraphBuffer[i]+shift;
-
-		if (shiftedVal>127) 
-			shiftedVal=127;
-		else if (shiftedVal<-127) 
-			shiftedVal=-127;
-		GraphBuffer[i-1] = shiftedVal;
+			GraphBuffer[i-1] = -127;
 	}
 	RepaintGraphWindow();
-	//CmdNorm("");
 	return 0;
 }
 
@@ -2171,7 +2162,7 @@ int CmdZerocrossings(const char *Cmd)
 static command_t CommandTable[] =
 {
 	{"help",            CmdHelp,            1, "This help"},
-	{"askedgedetect",   CmdAskEdgeDetect,   1, "[threshold] Adjust Graph for manual ask demod using length of sample differences to detect the edge of a wave (default = 25)"},
+	{"askedgedetect",   CmdAskEdgeDetect,   1, "[threshold] Adjust Graph for manual ask demod using the length of sample differences to detect the edge of a wave (use 20-45, def:25)"},
 	{"askem410xdemod",  CmdAskEM410xDemod,  1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
 	{"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
 	{"autocorr",        CmdAutoCorr,        1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index e45c788a..909045d3 100644
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -323,6 +323,7 @@ int EM4x50Read(const char *Cmd, bool verbose)
 	uint32_t Code[6];
 	char tmp[6];
 	char tmp2[20];
+	int phaseoff;
 	high = low = 0;
 	memset(tmpbuff, 0, MAX_GRAPH_TRACE_LEN / 64);
 
@@ -396,9 +397,11 @@ int EM4x50Read(const char *Cmd, bool verbose)
 	startblock = i + 4;
 
 	// skip over the remainder of LW
-	skip += tmpbuff[i+1] + tmpbuff[i+2] + clk + clk/8;
-	int phaseoff = tmpbuff[i+3]-clk;
-
+	skip += tmpbuff[i+1] + tmpbuff[i+2] + clk;
+	if (tmpbuff[i+3]>clk) 
+		phaseoff = tmpbuff[i+3]-clk;
+	else
+		phaseoff = 0;
 	// now do it again to find the end
 	end = skip;
 	for (i += 3; i < j - 4 ; ++i) {
@@ -423,12 +426,6 @@ int EM4x50Read(const char *Cmd, bool verbose)
 			PrintAndLog("  or after a 'data askedge' command to clean up the read");
 			return 0;
 		}
-		if (!complete)
-		{
-			PrintAndLog("*** Warning!");
-			PrintAndLog("Partial data - no end found!");
-			PrintAndLog("Try again with more samples.");
-		}
 	} else if (start < 0) return 0;
 	start = skip;
 	snprintf(tmp2, sizeof(tmp2),"%d %d 1000 %d", clk, invert, clk*47);
@@ -451,8 +448,12 @@ int EM4x50Read(const char *Cmd, bool verbose)
 				if (tmpbuff[i+1] >= clk-tol)
 					break;
 		}
+		if (i >= j-4) break; //next LW not found
 		skip += clk;
-		phaseoff = tmpbuff[i+1]-clk;
+		if (tmpbuff[i+1]>clk)
+			phaseoff = tmpbuff[i+1]-clk;
+		else
+			phaseoff = 0;
 		i += 2;
 		if (ASKmanDemod(tmp2, false, false) < 1) {
 			save_restoreGB(0);
@@ -475,16 +476,22 @@ int EM4x50Read(const char *Cmd, bool verbose)
 	}
 	//print full code:
 	if (verbose || g_debugMode || AllPTest){
+		if (!complete) {
+			PrintAndLog("*** Warning!");
+			PrintAndLog("Partial data - no end found!");
+			PrintAndLog("Try again with more samples.");
+		}
 		PrintAndLog("Found data at sample: %i - using clock: %i", start, clk);    
 		end = block;
 		for (block=0; block < end; block++){
 			PrintAndLog("Block %d: %08x",block,Code[block]);
 		}
-		if (AllPTest)
+		if (AllPTest) {
 			PrintAndLog("Parities Passed");
-		else
+		} else {
 			PrintAndLog("Parities Failed");
 			PrintAndLog("Try cleaning the read samples with 'data askedge'");
+		}
 	}
 
 	//restore GraphBuffer
diff --git a/client/graph.c b/client/graph.c
index 089119d9..3bea7881 100644
--- a/client/graph.c
+++ b/client/graph.c
@@ -56,9 +56,10 @@ void save_restoreGB(uint8_t saveOpt)
 		memcpy(SavedGB, GraphBuffer, sizeof(GraphBuffer));
 		SavedGBlen = GraphTraceLen;
 		GB_Saved=true;
-	} else if (GB_Saved){
+	} else if (GB_Saved){ //restore
 		memcpy(GraphBuffer, SavedGB, sizeof(GraphBuffer));
 		GraphTraceLen = SavedGBlen;
+		RepaintGraphWindow();
 	}
 	return;
 }
-- 
2.39.2