ADD: lf cotag - added first try at basic functionality to read samples from Cotag. In lfops.c is the startup sequence that needs to be tested out.

armsrc/appmain.c

@@ -1009,6 +1009,9 @@ void UsbPacketReceived(uint8_t *packet, int len)
         case CMD_VIKING_CLONE_TAG:
 			CopyVikingtoT55xx(c->arg[0], c->arg[1], c->arg[2]);
             break;
+		case CMD_COTAG:
+			Cotag();
+			break;
 #endif
 
 #ifdef WITH_HITAG

armsrc/apps.h

@@ -98,6 +98,7 @@ void T55xxWakeUp(uint32_t Pwd);
 void TurnReadLFOn(uint32_t delay);
 void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode);
 void EM4xWriteWord(uint32_t Data, uint8_t Address, uint32_t Pwd, uint8_t PwdMode);
+void Cotag();
 
 /// iso14443b.h
 void SimulateIso14443bTag(uint32_t pupi);

armsrc/lfops.c

@@ -1737,3 +1737,49 @@ void EM4xWriteWord(uint32_t Data, uint8_t Address, uint32_t Pwd, uint8_t PwdMode
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
 	LED_D_OFF();
 }
+
+void Cotag() {
+
+#define WAIT2200 	{ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); WaitUS(2200); }
+
+	LED_A_ON();
+	
+	//clear buffer now so it does not interfere with timing later
+	BigBuf_Clear_keep_EM();
+
+	// Set up FPGA, 132kHz to power up the tag
+	FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+	FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 89);
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+
+	// Connect the A/D to the peak-detected low-frequency path.
+	SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
+	
+	// 50ms for the resonant antenna to settle.
+	SpinDelay(50);
+	
+	// Now set up the SSC to get the ADC samples that are now streaming at us.
+	FpgaSetupSsc();
+	// start a 1.5ticks is 1us
+	StartTicks();
+	
+	//send start pulse
+	TurnReadLFOn(800);
+	WAIT2200
+	TurnReadLFOn(3600);
+	WAIT2200
+	TurnReadLFOn(800);
+	WAIT2200
+	TurnReadLFOn(3600);	
+	
+	// Turn field on to read the response
+	TurnReadLFOn(READ_GAP);
+	
+	// Acquisition
+	doT55x7Acquisition(20000);
+	
+	// Turn the field off
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
+	cmd_send(CMD_ACK,0,0,0,0,0);    
+	LED_A_OFF();
+}

client/Makefile

@@ -143,6 +143,7 @@ CMDSRCS =	mifarehost.c \
 			cmdlfvisa2000.c \
 			cmdlfnoralsy.c \
 			cmdlffdx.c \
+			cmdlfcotag.c \
 			pm3_binlib.c \
 			scripting.c \
 			cmdscript.c \

client/cmdlf.c

@@ -1192,6 +1192,7 @@ static command_t CommandTable[] =
 	{"help",        CmdHelp,            1, "This help"},
 	{"animal",      CmdLFFdx,           1, "{ Animal RFIDs... }"},
 	{"awid",        CmdLFAWID,          1, "{ AWID RFIDs... }"},
+	{"cotag",       CmdLFCOTAG,         1, "{ COTAG RFIDs... }"},
 	{"em4x",        CmdLFEM4X,          1, "{ EM4X RFIDs... }"},
 	{"guard",       CmdLFGuard,         1, "{ Guardall RFIDs... }"},
 	{"hid",         CmdLFHID,           1, "{ HID RFIDs... }"},

client/cmdlf.h

@@ -40,6 +40,7 @@
 #include "cmdlfvisa2000.h"  // for VISA2000 menu
 #include "cmdlfnoralsy.h"	// for NORALSY meny
 #include "cmdlffdx.h"		// for FDX-B meny
+#include "cmdlfcotag.h"		// for COTAG meny
 
 #define T55XX_WRITE_TIMEOUT	1500
 

client/cmdlfcotag.c

@@ -0,0 +1,41 @@
+//-----------------------------------------------------------------------------
+// Authored by Iceman
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Low frequency COTAG commands
+//-----------------------------------------------------------------------------
+#include "cmdlfcotag.h"  // COTAG function declarations
+ 
+static int CmdHelp(const char *Cmd);
+
+int CmdCOTAGRead(const char *Cmd) {
+
+//	if (Cmd[0] == 'h' || Cmd[0] == 'H') return usage_lf_cotag_read();
+
+	UsbCommand c = {CMD_COTAG, {0, 0, 0}};
+	clearCommandBuffer();
+	SendCommand(&c);
+
+	getSamples("20000", TRUE);
+	return CmdFSKdemodAWID(Cmd);
+}
+
+static command_t CommandTable[] = {
+	{"help",      CmdHelp,         1, "This help"},
+	{"read",      CmdCOTAGRead,     0, "Attempt to read and extract tag data"},
+	{NULL, NULL, 0, NULL}
+};
+
+int CmdLFCOTAG(const char *Cmd) {
+	clearCommandBuffer();
+	CmdsParse(CommandTable, Cmd);
+	return 0;
+}
+
+int CmdHelp(const char *Cmd) {
+	CmdsHelp(CommandTable);
+	return 0;
+}

client/cmdlfcotag.h

@@ -0,0 +1,22 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Low frequency AWID commands
+//-----------------------------------------------------------------------------
+
+#ifndef CMDLFCOTAG_H__
+#define CMDLFCOTAG_H__
+
+#include "proxmark3.h"  // Definitions, USB controls, etc
+#include "cmddata.h"	// getSamples
+#include "cmdparser.h"  // CmdsParse, CmdsHelp
+#include "cmdmain.h"
+
+int CmdLFCOTAG(const char *Cmd);
+int CmdCOTAGRead(const char *Cmd);
+
+#endif

client/hid-flasher/usb_cmd.h

@@ -95,7 +95,8 @@ typedef struct {
 #define CMD_PSK_SIM_TAG                                                   0x0220
 #define CMD_AWID_DEMOD_FSK                                                0x0221
 #define CMD_VIKING_CLONE_TAG                                              0x0222
-
+#define CMD_T55XX_WAKEUP	                                              0x0224
+#define CMD_COTAG														  0x0225
 
 /* CMD_SET_ADC_MUX: ext1 is 0 for lopkd, 1 for loraw, 2 for hipkd, 3 for hiraw */
 

client/lualibs/commands.lua

@@ -62,6 +62,7 @@ local _commands = {
 	CMD_AWID_DEMOD_FSK =                                                 0x0221,
 	CMD_VIKING_CLONE_TAG =                                               0x0222,
 	CMD_T55XX_WAKEUP =	                                              	 0x0224,
+	CMD_COTAG =															 0x0225,
 	
 	--/* CMD_SET_ADC_MUX: ext1 is 0 for lopkd, 1 for loraw, 2 for hipkd, 3 for hiraw */
 

include/usb_cmd.h

@@ -105,6 +105,7 @@ typedef struct{
 #define CMD_AWID_DEMOD_FSK                                                0x0221
 #define CMD_VIKING_CLONE_TAG                                              0x0222
 #define CMD_T55XX_WAKEUP	                                              0x0224
+#define CMD_COTAG														  0x0225
 
 /* CMD_SET_ADC_MUX: ext1 is 0 for lopkd, 1 for loraw, 2 for hipkd, 3 for hiraw */