From 92014925d6c45279f974382713403b5268f72de5 Mon Sep 17 00:00:00 2001
From: iceman1001 <iceman@iuse.se>
Date: Fri, 16 Dec 2016 19:06:19 +0100
Subject: [PATCH] CHG: 'LF VISA2000' adding askedgedetection when decoding
 allows for some traces to be correct demodulated.

---
 client/cmddata.c       |  4 ++--
 client/cmddata.h       |  1 +
 client/cmdlfvisa2000.c | 10 +++++++++-
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/client/cmddata.c b/client/cmddata.c
index bbe857d3..a5983e91 100644
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -26,8 +26,8 @@
 #include "loclass/cipherutils.h" // for decimating samples in getsamples
 
 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
-uint8_t g_debugMode=0;
-size_t DemodBufferLen=0;
+uint8_t g_debugMode = 0;
+size_t DemodBufferLen = 0;
 static int CmdHelp(const char *Cmd);
 
 int usage_data_printdemodbuf(void){
diff --git a/client/cmddata.h b/client/cmddata.h
index 66622975..67bf3316 100644
--- a/client/cmddata.h
+++ b/client/cmddata.h
@@ -30,6 +30,7 @@ int CmdG_Prox_II_Demod(const char *Cmd);
 int Cmdaskrawdemod(const char *Cmd);
 int Cmdaskmandemod(const char *Cmd);
 int AutoCorrelate(int window, bool SaveGrph, bool verbose);
+int CmdAskEdgeDetect(const char *Cmd);
 int CmdAutoCorr(const char *Cmd);
 int CmdBiphaseDecodeRaw(const char *Cmd);
 int CmdBitsamples(const char *Cmd);
diff --git a/client/cmdlfvisa2000.c b/client/cmdlfvisa2000.c
index 9148a435..b74a318a 100644
--- a/client/cmdlfvisa2000.c
+++ b/client/cmdlfvisa2000.c
@@ -48,10 +48,16 @@ static uint8_t visa_chksum( uint32_t id ) {
 //see ASKDemod for what args are accepted
 int CmdVisa2kDemod(const char *Cmd) {
 
+	// save GraphBuffer - to restore it later	
+	save_restoreGB(1);
+	
+	CmdAskEdgeDetect("");
+	
 	//ASK / Manchester
 	bool st = TRUE;
 	if (!ASKDemod_ext("64 0 0", FALSE, FALSE, 1, &st)) {
 		if (g_debugMode) PrintAndLog("DEBUG: Error - Visa2k: ASK/Manchester Demod failed");
+		save_restoreGB(0);
 		return 0;
 	}
 	size_t size = DemodBufferLen;
@@ -67,6 +73,7 @@ int CmdVisa2kDemod(const char *Cmd) {
 			else
 				PrintAndLog("DEBUG: Error - Visa2k: ans: %d", ans);
 		}
+		save_restoreGB(0);
 		return 0;
 	}
 	setDemodBuf(DemodBuffer, 96, ans);
@@ -82,10 +89,11 @@ int CmdVisa2kDemod(const char *Cmd) {
 	// test checksums
 	if ( chk != calc ) { 
 		printf("DEBUG: error: Visa2000 checksum failed %x - %x\n", chk, calc);
+		save_restoreGB(0);
 		return 0;
 	}
 	PrintAndLog("Visa2000 Tag Found: Card ID %u,  Raw: %08X%08X%08X", raw2,  raw1 ,raw2, raw3);
-
+	save_restoreGB(0);
 	return 1;
 }
 
-- 
2.39.2