X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/51b614aa75073617fa7f56196c3eef3e2145c786..b8fdac9e6fedfda5e291e437766ed46e3caf7c32:/client/cmdlfem4x.c

diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index e5bea068..83a7da4e 100644
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -146,17 +146,19 @@ void printEM410x(uint32_t hi, uint64_t id)
 int AskEm410xDecode(bool verbose, uint32_t *hi, uint64_t *lo )
 {
 	size_t idx = 0;
-	size_t BitLen = DemodBufferLen;
-	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
-	memcpy(BitStream, DemodBuffer, BitLen); 
-	if (Em410xDecode(BitStream, &BitLen, &idx, hi, lo)){
+	uint8_t BitStream[512]={0};
+	size_t BitLen = sizeof(BitStream);
+	if ( !getDemodBuf(BitStream, &BitLen) ) return 0;
+
+	if (Em410xDecode(BitStream, &BitLen, &idx, hi, lo)) {
 		//set GraphBuffer for clone or sim command
-		setDemodBuf(BitStream, BitLen, idx);
-		if (g_debugMode){
+		setDemodBuf(DemodBuffer, (BitLen==40) ? 64 : 128, idx+1);
+		g_DemodStartIdx += (idx+1)*g_DemodClock;
+		if (g_debugMode) {
 			PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
 			printDemodBuff();
 		}
-		if (verbose){
+		if (verbose) {
 			PrintAndLog("EM410x pattern found: ");
 			printEM410x(*hi, *lo);
 			g_em410xId = *lo;
@@ -298,9 +300,7 @@ int CmdEM410xWatch(const char *Cmd)
 			printf("\naborted via keyboard!\n");
 			break;
 		}
-		
-		CmdLFRead("s");
-		getSamples("8201",true); 
+		lf_read(true, 8201);
 	} while (!CmdAskEM410xDemod(""));
 
 	return 0;
@@ -914,6 +914,9 @@ int usage_lf_em_write(void) {
 	return 0;
 }
 
+// note: em4x05 doesn't have a way to invert data output so we must invert the data prior to writing
+//         it if invertion is needed. (example FSK2a vs FSK)
+//       also em4x05 requires swapping word data when compared to the data used for t55xx chips.
 int EM4x05WriteWord(uint8_t addr, uint32_t data, uint32_t pwd, bool usePwd, bool swap, bool invert) {
 	if (swap) data = SwapBits(data, 32);
 
@@ -962,7 +965,7 @@ int CmdEM4x05WriteWord(const char *Cmd) {
 	bool swap = false;
 	bool invert = false;
 	uint8_t addr = 16; // default to invalid address
-
+	bool gotData = false;
 	char cmdp = 0;
 	while(param_getchar(Cmd, cmdp) != 0x00)
 	{
@@ -979,6 +982,7 @@ int CmdEM4x05WriteWord(const char *Cmd) {
 		case 'd':
 		case 'D':
 			data = param_get32ex(Cmd, cmdp+1, 0, 16);
+			gotData = true;
 			cmdp += 2;
 			break;
 		case 'i':
@@ -1013,6 +1017,10 @@ int CmdEM4x05WriteWord(const char *Cmd) {
 
 	if ( strlen(Cmd) == 0 ) return usage_lf_em_write();
 
+	if (!gotData) {
+		PrintAndLog("You must enter the data you want to write");
+		return usage_lf_em_write();
+	}
 	return EM4x05WriteWord(addr, data, pwd, usePwd, swap, invert);
 }