ADD: @marshmellows42 's fixes for "lf cmdread" and CHANGELOG.md

ADD:  Added the "lf t55x7 wakeup" command. It will send a pwd,  and leave the antenna on.
Process like:
1. lf t55x7 wakeup p 11223344
2. lf search

---
It is still not finished,  will work together with the "lf t55x7 commands" in next step when I figure out the process from the datasheets.

armsrc/appmain.c

@@ -980,7 +980,7 @@ void UsbPacketReceived(uint8_t *packet, int len)
 			CopyIndala224toT55x7(c->d.asDwords[0], c->d.asDwords[1], c->d.asDwords[2], c->d.asDwords[3], c->d.asDwords[4], c->d.asDwords[5], c->d.asDwords[6]);
 			break;
 		case CMD_T55XX_READ_BLOCK:
-			T55xxReadBlock(c->arg[1], c->arg[2],c->d.asBytes[0]);
+			T55xxReadBlock(c->arg[0], c->arg[1], c->arg[2]);
 			break;
 		case CMD_T55XX_WRITE_BLOCK:
 			T55xxWriteBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes[0]);
@@ -988,6 +988,9 @@ void UsbPacketReceived(uint8_t *packet, int len)
 		case CMD_T55XX_READ_TRACE:
 			T55xxReadTrace();
 			break;
+		case CMD_T55XX_WAKEUP:
+			T55xxWakeUp(c->arg[0]);
+			break;
 		case CMD_PCF7931_READ:
 			ReadPCF7931();
 			break;

armsrc/apps.h

@@ -67,9 +67,10 @@ extern uint8_t bits_per_sample ;
 extern bool averaging;
 
 void AcquireRawAdcSamples125k(int divisor);
-void ModThenAcquireRawAdcSamples125k(int delay_off,int period_0,int period_1,uint8_t *command);
+void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t period_0, uint32_t period_1, uint8_t *command);
 void ReadTItag(void);
 void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc);
+
 void AcquireTiType(void);
 void AcquireRawBitsTI(void);
 void SimulateTagLowFrequency(int period, int gap, int ledcontrol);
@@ -88,8 +89,9 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo);
 void CopyIndala64toT55x7(int hi, int lo); // Clone Indala 64-bit tag by UID to T55x7
 void CopyIndala224toT55x7(int uid1, int uid2, int uid3, int uid4, int uid5, int uid6, int uid7); // Clone Indala 224-bit tag by UID to T55x7
 void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMode);
-void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode );
+void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd);
 void T55xxReadTrace(void);
+void T55xxWakeUp(uint32_t Pwd);
 void TurnReadLFOn();
 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);

armsrc/lfops.c

@@ -26,7 +26,7 @@
  * @param period_1
  * @param command
  */
-void ModThenAcquireRawAdcSamples125k(int delay_off, int period_0, int period_1, uint8_t *command)
+void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t period_0, uint32_t period_1, uint8_t *command)
 {
 
 	int divisor_used = 95; // 125 KHz
@@ -1167,7 +1167,7 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMod
 	T55xxWriteBit(1);
 	T55xxWriteBit(0); //Page 0
 	
-	if (PwdMode == 1){
+	if (PwdMode){
 		// Send Pwd
 		for (i = 0x80000000; i != 0; i >>= 1)
 			T55xxWriteBit(Pwd & i);
@@ -1190,13 +1190,14 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMod
 	// turn field off
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	cmd_send(CMD_ACK,0,0,0,0,0);
-	LED_A_OFF();	
+	LED_A_OFF();
+	LED_B_OFF();
 }
 
 // Read one card block in page 0
-void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode) {
+void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
 	LED_A_ON();
-	
+	uint8_t PwdMode = arg0 & 0xFF;
 	uint32_t i = 0;
 	
 	//clear buffer now so it does not interfere with timing later
@@ -1208,8 +1209,7 @@ void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode) {
 	// Set up FPGA, 125kHz
 	LFSetupFPGAForADC(95, true);
 	
-	// Trigger T55x7 in mode.
-  // Trigger T55x7 Direct Access Mode
+	// Trigger T55x7 Direct Access Mode
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	SpinDelayUs(START_GAP);
 	
@@ -1217,11 +1217,12 @@ void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode) {
 	T55xxWriteBit(1);
 	T55xxWriteBit(0); //Page 0
 
-	if (PwdMode == 1){
+	if (PwdMode){
 		// Send Pwd
 		for (i = 0x80000000; i != 0; i >>= 1)
 			T55xxWriteBit(Pwd & i);
 	}
+
 	// Send a zero bit separation
 	T55xxWriteBit(0);
 	
@@ -1239,6 +1240,7 @@ void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode) {
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	cmd_send(CMD_ACK,0,0,0,0,0);    
 	LED_A_OFF();
+	LED_B_OFF();
 }
 
 // Read card traceability data (page 1)
@@ -1269,6 +1271,30 @@ void T55xxReadTrace(void){
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	cmd_send(CMD_ACK,0,0,0,0,0);
 	LED_A_OFF();
+	LED_B_OFF();
+}
+
+void T55xxWakeUp(uint32_t Pwd){
+	LED_B_ON();
+	uint32_t i = 0;
+	
+	// Set up FPGA, 125kHz
+	LFSetupFPGAForADC(95, true);
+	
+	// Trigger T55x7 Direct Access Mode
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	SpinDelayUs(START_GAP);
+	
+	// Opcode 10
+	T55xxWriteBit(1);
+	T55xxWriteBit(0); //Page 0
+
+	// Send Pwd
+	for (i = 0x80000000; i != 0; i >>= 1)
+		T55xxWriteBit(Pwd & i);
+
+	// Turn field on to read the response
+	TurnReadLFOn(READ_GAP);
 }
 
 /*-------------- Cloning routines -----------*/

armsrc/lfsampling.c

@@ -266,14 +266,16 @@ void doT55x7Acquisition(void){
 	if ( bufsize > T55xx_SAMPLES_SIZE )
 		bufsize = T55xx_SAMPLES_SIZE;
 
-	//memset(dest, 0, bufsize);
-		
 	uint16_t i = 0;
+	uint16_t nosignal = 0;
 	bool startFound = false;
 	bool highFound = false;
 	uint8_t curSample = 0;
 	uint8_t firstSample = 0;
-	for(;;) {
+	while(!BUTTON_PRESS()) {
+		WDT_HIT();
+		if ( nosignal == 0xFFFF ) break;
+		
 		if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
 			AT91C_BASE_SSC->SSC_THR = 0x43;
 			LED_D_ON();
@@ -287,6 +289,7 @@ void doT55x7Acquisition(void){
 					firstSample = curSample;
 				highFound = true;
 			} else if (!highFound) {
+				nosignal++;
 				continue;
 			}