From 66837a0302678f4c5036b9c6a607731b9a8460de Mon Sep 17 00:00:00 2001
From: marshmellow42 <marshmellowrf@gmail.com>
Date: Fri, 30 Oct 2015 23:23:27 -0400
Subject: [PATCH] Add lf t55xx resetread cmd + fix clone cmds

resetread cmd to determine start of streaming bits of ata5577 or
compatible chips...
fixed lf clone bugs introduced while refactoring recently...
---
 armsrc/appmain.c             |  6 ++--
 armsrc/apps.h                |  1 +
 armsrc/lfops.c               | 58 +++++++++++++++++++++++++++---------
 armsrc/lfsampling.c          |  7 ++---
 armsrc/lfsampling.h          |  2 +-
 client/cmdlft55xx.c          | 38 ++++++++++++++++-------
 client/cmdlft55xx.h          |  1 +
 client/hid-flasher/usb_cmd.h |  2 +-
 client/lualibs/commands.lua  |  2 +-
 include/usb_cmd.h            |  2 +-
 10 files changed, 84 insertions(+), 35 deletions(-)

diff --git a/armsrc/appmain.c b/armsrc/appmain.c
index 68d2551f..6e08ba66 100644
--- a/armsrc/appmain.c
+++ b/armsrc/appmain.c
@@ -983,9 +983,9 @@ void UsbPacketReceived(uint8_t *packet, int len)
 		case CMD_T55XX_WAKEUP:
 			T55xxWakeUp(c->arg[0]);
 			break;
-		//case CMD_T55XX_READ_TRACE:
-		//	T55xxReadTrace();
-		//	break;
+		case CMD_T55XX_RESET_READ:
+			T55xxResetRead();
+			break;
 		case CMD_PCF7931_READ:
 			ReadPCF7931();
 			break;
diff --git a/armsrc/apps.h b/armsrc/apps.h
index f81f7bac..de32ef54 100644
--- a/armsrc/apps.h
+++ b/armsrc/apps.h
@@ -79,6 +79,7 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT); //
 void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo);
 void CopyIndala64toT55x7(uint32_t hi, uint32_t lo); // Clone Indala 64-bit tag by UID to T55x7
 void CopyIndala224toT55x7(uint32_t uid1, uint32_t uid2, uint32_t uid3, uint32_t uid4, uint32_t uid5, uint32_t uid6, uint32_t uid7); // Clone Indala 224-bit tag by UID to T55x7
+void T55xxResetRead(void);
 void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMode);
 void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd);
 void T55xxWakeUp(uint32_t Pwd);
diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index 8f611179..ffccff83 100644
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -1110,8 +1110,34 @@ void T55xxWriteBit(int bit) {
 	SpinDelayUs(WRITE_GAP);
 }
 
+// Send T5577 reset command then read stream (see if we can identify the start of the stream)
+void T55xxResetRead(void) {
+	LED_A_ON();
+	// Set up FPGA, 125kHz
+	LFSetupFPGAForADC(95, true);
+
+	// Trigger T55x7 in mode.
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	SpinDelayUs(START_GAP);
+
+	// reset tag - op code 00
+	T55xxWriteBit(0);
+	T55xxWriteBit(0);
+
+	// Turn field on to read the response
+	TurnReadLFOn(READ_GAP);
+
+	// Acquisition
+	doT55x7Acquisition(39999);
+
+	// Turn the field off
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
+	cmd_send(CMD_ACK,0,0,0,0,0);    
+	LED_A_OFF();
+}
+
 // Write one card block in page 0, no lock
-void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) {
+void T55xxWriteBlockExt(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) {
 	LED_A_ON();
 	bool PwdMode = arg & 0x1;
 	uint8_t Page = (arg & 0x2)>>1;
@@ -1153,10 +1179,15 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) {
 
 	// turn field off
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	cmd_send(CMD_ACK,0,0,0,0,0);
 	LED_A_OFF();
 }
 
+// Write one card block in page 0, no lock
+void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) {
+	T55xxWriteBlockExt(Data, Block, Pwd, arg);
+	cmd_send(CMD_ACK,0,0,0,0,0);
+}
+
 // Read one card block in page 0
 void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
 	LED_A_ON();
@@ -1199,7 +1230,7 @@ void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
 	TurnReadLFOn(READ_GAP);
 
 	// Acquisition
-	doT55x7Acquisition();
+	doT55x7Acquisition(12000);
 
 	// Turn the field off
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
@@ -1234,8 +1265,10 @@ void T55xxWakeUp(uint32_t Pwd){
 
 void WriteT55xx(uint32_t *blockdata, uint8_t startblock, uint8_t numblocks) {
 	// write last block first and config block last (if included)
-	for (uint8_t i = numblocks; i > startblock; i--)
-		T55xxWriteBlock(blockdata[i-1],i-1,0,0);
+	for (uint8_t i = numblocks+startblock; i > startblock; i--) {
+		Dbprintf("write- Blk: %d, d:%08X",i-1,blockdata[i-1]);
+		T55xxWriteBlockExt(blockdata[i-1],i-1,0,0);
+	}
 }
 
 // Copy HID id to card and setup block 0 config
@@ -1253,7 +1286,7 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
 		// Build the 6 data blocks for supplied 84bit ID
 		last_block = 6;
 		// load preamble (1D) & long format identifier (9E manchester encoded)
-		data[1] = 0x1D96A900 | manchesterEncode2Bytes((hi2 >> 16) & 0xF);
+		data[1] = 0x1D96A900 | (manchesterEncode2Bytes((hi2 >> 16) & 0xF) & 0xFF);
 		// load raw id from hi2, hi, lo to data blocks (manchester encoded)
 		data[2] = manchesterEncode2Bytes(hi2 & 0xFFFF);
 		data[3] = manchesterEncode2Bytes(hi >> 16);
@@ -1269,7 +1302,7 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
 		// Build the 3 data blocks for supplied 44bit ID
 		last_block = 3;
 		// load preamble
-		data[1] = 0x1D000000 | manchesterEncode2Bytes(hi & 0xFFF);
+		data[1] = 0x1D000000 | (manchesterEncode2Bytes(hi) & 0xFFFFFF);
 		data[2] = manchesterEncode2Bytes(lo >> 16);
 		data[3] = manchesterEncode2Bytes(lo & 0xFFFF);
 	}
@@ -1286,8 +1319,7 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
 	DbpString("DONE!");
 }
 
-void CopyIOtoT55x7(uint32_t hi, uint32_t lo, uint8_t longFMT)
-{
+void CopyIOtoT55x7(uint32_t hi, uint32_t lo, uint8_t longFMT) {
 	uint32_t data[] = {T55x7_BITRATE_RF_64 | T55x7_MODULATION_FSK2a | (2 << T55x7_MAXBLOCK_SHIFT), hi, lo};
 
 	LED_D_ON();
@@ -1311,8 +1343,7 @@ void CopyIndala64toT55x7(uint32_t hi, uint32_t lo) {
 	DbpString("DONE!");
 }
 // Clone Indala 224-bit tag by UID to T55x7
-void CopyIndala224toT55x7(uint32_t uid1, uint32_t uid2, uint32_t uid3, uint32_t uid4, uint32_t uid5, uint32_t uid6, uint32_t uid7)
-{
+void CopyIndala224toT55x7(uint32_t uid1, uint32_t uid2, uint32_t uid3, uint32_t uid4, uint32_t uid5, uint32_t uid6, uint32_t uid7) {
 	//Program the 7 data blocks for supplied 224bit UID
 	uint32_t data[] = {0, uid1, uid2, uid3, uid4, uid5, uid6, uid7};
 	// and the block 0 for Indala224 format	
@@ -1328,8 +1359,7 @@ void CopyIndala224toT55x7(uint32_t uid1, uint32_t uid2, uint32_t uid3, uint32_t
 #define EM410X_HEADER		  0x1FF
 #define EM410X_ID_LENGTH	40
 
-void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
-{
+void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo) {
 	int i, id_bit;
 	uint64_t id = EM410X_HEADER;
 	uint64_t rev_id = 0;	// reversed ID
@@ -1389,7 +1419,7 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
 	LED_D_ON();
 
 	// Write EM410x ID
-	uint32_t data[] = {0, id>>32, id & 0xFFFF};
+	uint32_t data[] = {0, id>>32, id & 0xFFFFFFFF};
 	if (card) {
 		clock = (card & 0xFF00) >> 8;
 		clock = (clock == 0) ? 64 : clock;
diff --git a/armsrc/lfsampling.c b/armsrc/lfsampling.c
index 91572563..4a968776 100644
--- a/armsrc/lfsampling.c
+++ b/armsrc/lfsampling.c
@@ -253,17 +253,16 @@ uint32_t SnoopLF()
 * acquisition of T55x7 LF signal. Similart to other LF, but adjusted with @marshmellows thresholds
 * the data is collected in BigBuf.
 **/
-void doT55x7Acquisition(void){
+void doT55x7Acquisition(size_t sample_size) {
 
-	#define T55xx_SAMPLES_SIZE 12000 // 32 x 32 x 10  (32 bit times numofblock (7), times clock skip..)
 	#define T55xx_READ_UPPER_THRESHOLD 128+40  // 50
 	#define T55xx_READ_TOL   5
 
 	uint8_t *dest = BigBuf_get_addr();
 	uint16_t bufsize = BigBuf_max_traceLen();
 	
-	if ( bufsize > T55xx_SAMPLES_SIZE )
-		bufsize = T55xx_SAMPLES_SIZE;
+	if ( bufsize > sample_size )
+		bufsize = sample_size;
 
 	//memset(dest, 0, bufsize);
 		
diff --git a/armsrc/lfsampling.h b/armsrc/lfsampling.h
index a88def55..bd8ad1d0 100644
--- a/armsrc/lfsampling.h
+++ b/armsrc/lfsampling.h
@@ -5,7 +5,7 @@
 * acquisition of T55x7 LF signal. Similart to other LF, but adjusted with @marshmellows thresholds
 * the data is collected in BigBuf.
 **/
-void doT55x7Acquisition(void);
+void doT55x7Acquisition(size_t sample_size);
 
 /**
 * Initializes the FPGA for reader-mode (field on), and acquires the samples.
diff --git a/client/cmdlft55xx.c b/client/cmdlft55xx.c
index c133726b..b11a6494 100644
--- a/client/cmdlft55xx.c
+++ b/client/cmdlft55xx.c
@@ -1165,18 +1165,36 @@ uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits){
 	return tmp;
 }
 
+int CmdResetRead(const char *Cmd) {
+	UsbCommand c = {CMD_T55XX_RESET_READ, {0,0,0}};
+
+	clearCommandBuffer();
+	SendCommand(&c);
+	if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
+		PrintAndLog("command execution time out");
+		return 0;
+	}
+
+	uint8_t got[39999];
+	GetFromBigBuf(got,sizeof(got),0);
+	WaitForResponse(CMD_ACK,NULL);
+	setGraphBuf(got, sizeof(got));
+	return 1;
+}
+
 static command_t CommandTable[] =
 {
-  {"help",   CmdHelp,           1, "This help"},
-  {"config", CmdT55xxSetConfig, 1, "Set/Get T55XX configuration (modulation, inverted, offset, rate)"},
-  {"detect", CmdT55xxDetect,    0, "[1] Try detecting the tag modulation from reading the configuration block."},
-  {"read",   CmdT55xxReadBlock, 0, "b <block> p [password] [o] [1] -- Read T55xx block data (page 0) [optional password]"},
-  {"write",  CmdT55xxWriteBlock,0, "b <block> d <data> p [password] [1] -- Write T55xx block data (page 0) [optional password]"},
-  {"trace",  CmdT55xxReadTrace, 0, "[1] Show T55xx traceability data (page 1/ blk 0-1)"},
-  {"info",   CmdT55xxInfo,      0, "[1] Show T55xx configuration data (page 0/ blk 0)"},
-  {"dump",   CmdT55xxDump,      0, "[password] [o] Dump T55xx card block 0-7. [optional password]"},
-  {"special", special,          0, "Show block changes with 64 different offsets"},
-  {"wakeup", CmdT55xxWakeUp,    0, "Send AOR wakeup command"},
+  {"help",     CmdHelp,           1, "This help"},
+  {"config",   CmdT55xxSetConfig, 1, "Set/Get T55XX configuration (modulation, inverted, offset, rate)"},
+  {"detect",   CmdT55xxDetect,    0, "[1] Try detecting the tag modulation from reading the configuration block."},
+  {"read",     CmdT55xxReadBlock, 0, "b <block> p [password] [o] [1] -- Read T55xx block data (page 0) [optional password]"},
+  {"resetread",CmdResetRead,      0, "Send Reset Cmd then lf read the stream to attempt to identify the start of it (needs a demod and/or plot after)"},
+  {"write",    CmdT55xxWriteBlock,0, "b <block> d <data> p [password] [1] -- Write T55xx block data (page 0) [optional password]"},
+  {"trace",    CmdT55xxReadTrace, 0, "[1] Show T55xx traceability data (page 1/ blk 0-1)"},
+  {"info",     CmdT55xxInfo,      0, "[1] Show T55xx configuration data (page 0/ blk 0)"},
+  {"dump",     CmdT55xxDump,      0, "[password] [o] Dump T55xx card block 0-7. [optional password]"},
+  {"special",  special,           0, "Show block changes with 64 different offsets"},
+  {"wakeup",   CmdT55xxWakeUp,    0, "Send AOR wakeup command"},
   {NULL, NULL, 0, NULL}
 };
 
diff --git a/client/cmdlft55xx.h b/client/cmdlft55xx.h
index a9ee0317..cd50f99a 100644
--- a/client/cmdlft55xx.h
+++ b/client/cmdlft55xx.h
@@ -47,6 +47,7 @@ int CmdT55xxWriteBlock(const char *Cmd);
 int CmdT55xxReadTrace(const char *Cmd);
 int CmdT55xxInfo(const char *Cmd);
 int CmdT55xxDetect(const char *Cmd);
+int CmdResetRead(const char *Cmd);
 
 char * GetBitRateStr(uint32_t id);
 char * GetSaferStr(uint32_t id);
diff --git a/client/hid-flasher/usb_cmd.h b/client/hid-flasher/usb_cmd.h
index 8f67e82b..c8b576fd 100644
--- a/client/hid-flasher/usb_cmd.h
+++ b/client/hid-flasher/usb_cmd.h
@@ -73,7 +73,7 @@ typedef struct {
 #define CMD_INDALA_CLONE_TAG_L                                            0x0213
 #define CMD_T55XX_READ_BLOCK                                              0x0214
 #define CMD_T55XX_WRITE_BLOCK                                             0x0215
-//#define CMD_T55XX_READ_TRACE                                              0x0216
+#define CMD_T55XX_RESET_READ                                              0x0216
 #define CMD_PCF7931_READ                                                  0x0217
 #define CMD_EM4X_READ_WORD                                                0x0218
 #define CMD_EM4X_WRITE_WORD                                               0x0219
diff --git a/client/lualibs/commands.lua b/client/lualibs/commands.lua
index 8f43ea9e..8cdcfb34 100644
--- a/client/lualibs/commands.lua
+++ b/client/lualibs/commands.lua
@@ -44,7 +44,7 @@ local _commands = {
 	CMD_INDALA_CLONE_TAG_L =                                             0x0213,
 	CMD_T55XX_READ_BLOCK =                                               0x0214,
 	CMD_T55XX_WRITE_BLOCK =                                              0x0215,
-	--//CMD_T55XX_READ_TRACE =                                               0x0216,
+	CMD_T55XX_RESET_READ =                                               0x0216,
 	CMD_PCF7931_READ =                                                   0x0217,
 	CMD_EM4X_READ_WORD =                                                 0x0218,
 	CMD_EM4X_WRITE_WORD =                                                0x0219,
diff --git a/include/usb_cmd.h b/include/usb_cmd.h
index 53917606..3b6cb291 100644
--- a/include/usb_cmd.h
+++ b/include/usb_cmd.h
@@ -85,7 +85,7 @@ typedef struct{
 #define CMD_INDALA_CLONE_TAG_L                                            0x0213
 #define CMD_T55XX_READ_BLOCK                                              0x0214
 #define CMD_T55XX_WRITE_BLOCK                                             0x0215
-//#define CMD_T55XX_READ_TRACE                                              0x0216
+#define CMD_T55XX_RESET_READ                                              0x0216
 #define CMD_PCF7931_READ                                                  0x0217
 #define CMD_PCF7931_WRITE                                                 0x0222
 #define CMD_EM4X_READ_WORD                                                0x0218
-- 
2.39.5