X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/ff9c043da29150aa785723326537ba93ddac0614..9833360b251571f82749c352f49d712c9c8322ad:/armsrc/lfops.c

diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index c8eed468..c0c24787 100644
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -326,7 +326,6 @@ void AcquireTiType(void)
 // if not provided a valid crc will be computed from the data and written.
 void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
 {
-	StartTicks();
 	FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
 	if(crc == 0) {
 		crc = update_crc16(crc, (idlo)&0xff);
@@ -347,8 +346,10 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
 	// whether we're modulating the antenna (high)
 	// or listening to the antenna (low)
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_PASSTHRU);
+	StartTicks();
+	
 	LED_A_ON();
-
+	
 	// steal this pin from the SSP and use it to control the modulation
 	AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;
 	AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
@@ -361,7 +362,7 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
 	// then write 80 bits of data (or 64 bit data + 16 bit crc if you prefer)
 	// finally end with 0x0300 (write frame)
 	// all data is sent lsb first
-	// finish with 15ms programming time
+	// finish with 50ms programming time
 
 	// modulate antenna
 	HIGH(GPIO_SSC_DOUT);
@@ -399,7 +400,8 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 	int i = 0;
 	uint8_t *buf = BigBuf_get_addr();
 
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_PASSTHRU);
+	//FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
 	//FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT | FPGA_LF_EDGE_DETECT_READER_FIELD);
 	//FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT | FPGA_LF_EDGE_DETECT_TOGGLE_MODE );
 
@@ -420,8 +422,9 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 	AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK;
 
 	// power on antenna
-	// OPEN_COIL();
-	// SpinDelay(50);
+	OPEN_COIL();
+	// charge time
+	WaitMS(50);
 		
 	for(;;) {
 		WDT_HIT();
@@ -1176,6 +1179,10 @@ void TurnReadLFOn(uint32_t delay) {
 	// Give it a bit of time for the resonant antenna to settle.
 	WaitUS(delay);
 }
+void TurnReadLF_off(uint32_t delay) {
+	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+	WaitUS(delay);
+}
 
 // Write one bit to card
 void T55xxWriteBit(int bit) {
@@ -1646,15 +1653,8 @@ void SendForward(uint8_t fwd_bit_count) {
 // 55FC * 8us == 440us / 21.3 === 20.65 steps.  could be too short. Go for 56FC instead
 // 32FC * 8us == 256us / 21.3 ==  12.018 steps. ok
 // 16FC * 8us == 128us / 21.3 ==  6.009 steps. ok 
-
 #ifndef EM_START_GAP
-#define EM_START_GAP 60*8
-#endif
-#ifndef EM_ONE_GAP
-#define EM_ONE_GAP 32*8
-#endif
-#ifndef EM_ZERO_GAP
-# define EM_ZERO_GAP 16*8
+#define EM_START_GAP 55*8
 #endif
 
 	fwd_write_ptr = forwardLink_data;
@@ -1667,19 +1667,16 @@ void SendForward(uint8_t fwd_bit_count) {
 	fwd_bit_sz--; //prepare next bit modulation
 	fwd_write_ptr++;
 	
-	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-	WaitUS(EM_START_GAP);
-	TurnReadLFOn(16);
+	TurnReadLF_off(EM_START_GAP);
+	TurnReadLFOn(18*8);
 
 	// now start writting with bitbanging the antenna.
 	while(fwd_bit_sz-- > 0) { //prepare next bit modulation
-		if(((*fwd_write_ptr++) & 1) == 1)
-			WaitUS(EM_ONE_GAP);
-		else {
-			//These timings work for 4469/4269/4305
-			FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-			WaitUS(20);			
-			TurnReadLFOn(12);
+		if(((*fwd_write_ptr++) & 1) == 1) {
+			WaitUS(32);
+		} else {
+			TurnReadLF_off(23*8);
+			TurnReadLFOn(18*8);
 		}
 	}
 }
@@ -1690,7 +1687,7 @@ void EM4xLogin(uint32_t pwd) {
 	len = Prepare_Cmd( FWD_CMD_LOGIN );
 	len += Prepare_Data( pwd & 0xFFFF, pwd >> 16 );
 	SendForward(len);
-	//WaitMS(20); - no wait for login command.
+	//WaitUS(20); // no wait for login command.
 	// should receive
 	// 0000 1010 ok.
 	// 0000 0001 fail
@@ -1699,7 +1696,6 @@ void EM4xLogin(uint32_t pwd) {
 void EM4xReadWord(uint8_t addr, uint32_t pwd, uint8_t usepwd) {
 
 	LED_A_ON();
-
 	uint8_t len;
 	
 	//clear buffer now so it does not interfere with timing later
@@ -1719,7 +1715,9 @@ void EM4xReadWord(uint8_t addr, uint32_t pwd, uint8_t usepwd) {
 
 	SendForward(len);
 
-	DoAcquisition_config(TRUE);
+	WaitUS(400);
+
+	DoPartialAcquisition(20, true, 6000);
 
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	cmd_send(CMD_ACK,0,0,0,0,0);
@@ -1752,8 +1750,12 @@ void EM4xWriteWord(uint32_t flag, uint32_t data, uint32_t pwd) {
 
 	SendForward(len);
 
-	//Wait 20ms for write to complete
-	WaitMS(20);
+	//Wait 20ms for write to complete?
+	WaitMS(7);
+
+	//Capture response if one exists
+	DoPartialAcquisition(20, true, 6000);
+	
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 	cmd_send(CMD_ACK,0,0,0,0,0);
 	LED_A_OFF();