Merge pull request #438 from pwpiwi/fpga_14b

[proxmark3-svn] / armsrc / lfops.c

diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index 0691098b82ec5cb6330a70122d8e93c1cdb330e1..641c02e876edf278f611138fd1ec7d3043729e89 100644 (file)
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -17,7 +17,7 @@
 #include "lfdemod.h"
 #include "lfsampling.h"
 #include "protocols.h"
 #include "lfdemod.h"
 #include "lfsampling.h"
 #include "protocols.h"

-#include "usb_cdc.h" //test
+#include "usb_cdc.h" // for usb_poll_validate_length

 
 /**
  * Function to do a modulation and then get samples.
 
 /**
  * Function to do a modulation and then get samples.


@@ -37,6 +37,8 @@ void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t period_0, uint
 
        sample_config sc = { 0,0,1, divisor_used, 0};
        setSamplingConfig(&sc);
 
        sample_config sc = { 0,0,1, divisor_used, 0};
        setSamplingConfig(&sc);

+       //clear read buffer
+       BigBuf_Clear_keep_EM();

 
        /* Make sure the tag is reset */
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
 
        /* Make sure the tag is reset */
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);


@@ -70,11 +72,9 @@ void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t period_0, uint
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        // now do the read
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        // now do the read

-       DoAcquisition_config(false);
+       DoAcquisition_config(false, 0);

 }
 
 }
 

-
-

 /* blank r/w tag data stream
 ...0000000000000000 01111111
 1010101010101010101010101010101010101010101010101010101010101010
 /* blank r/w tag data stream
 ...0000000000000000 01111111
 1010101010101010101010101010101010101010101010101010101010101010


@@ -214,8 +214,6 @@ void ReadTItag(void)
        }
 }
 
        }
 }
 

-
-

 void WriteTIbyte(uint8_t b)
 {
        int i = 0;
 void WriteTIbyte(uint8_t b)
 {
        int i = 0;


@@ -250,7 +248,7 @@ void AcquireTiType(void)
 
        // clear buffer
        uint32_t *BigBuf = (uint32_t *)BigBuf_get_addr();
 
        // clear buffer
        uint32_t *BigBuf = (uint32_t *)BigBuf_get_addr();

-       memset(BigBuf,0,BigBuf_max_traceLen()/sizeof(uint32_t));
+       BigBuf_Clear_ext(false);

 
        // Set up the synchronous serial port
        AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DIN;
 
        // Set up the synchronous serial port
        AT91C_BASE_PIOA->PIO_PDR = GPIO_SSC_DIN;


@@ -312,16 +310,11 @@ void AcquireTiType(void)
        }
 }
 
        }
 }
 

-
-
-

 // arguments: 64bit data split into 32bit idhi:idlo and optional 16bit crc
 // if crc provided, it will be written with the data verbatim (even if bogus)
 // 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)
 {
 // arguments: 64bit data split into 32bit idhi:idlo and optional 16bit crc
 // if crc provided, it will be written with the data verbatim (even if bogus)
 // 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)
 {

-
-

        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        if(crc == 0) {
                crc = update_crc16(crc, (idlo)&0xff);
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        if(crc == 0) {
                crc = update_crc16(crc, (idlo)&0xff);


@@ -386,7 +379,7 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
        AcquireTiType();
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        AcquireTiType();
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       DbpString("Now use tiread to check");
+       DbpString("Now use `lf ti read` to check");

 }
 
 void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 }
 
 void SimulateTagLowFrequency(int period, int gap, int ledcontrol)


@@ -394,7 +387,8 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
        int i;
        uint8_t *tab = BigBuf_get_addr();
 
        int i;
        uint8_t *tab = BigBuf_get_addr();
 

-       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+       //note FpgaDownloadAndGo destroys the bigbuf so be sure this is called before now...
+       //FpgaDownloadAndGo(FPGA_BITSTREAM_LF);  

        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
 
        AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK;
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
 
        AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK;


@@ -402,18 +396,25 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
        AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
        AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK;
 
        AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
        AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK;
 

- #define SHORT_COIL()  LOW(GPIO_SSC_DOUT)
- #define OPEN_COIL()           HIGH(GPIO_SSC_DOUT)
+ #define SHORT_COIL()   LOW(GPIO_SSC_DOUT)
+ #define OPEN_COIL()    HIGH(GPIO_SSC_DOUT)

 
        i = 0;
        for(;;) {
                //wait until SSC_CLK goes HIGH
 
        i = 0;
        for(;;) {
                //wait until SSC_CLK goes HIGH

+               int ii = 0;

                while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
                while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {

-                       if(BUTTON_PRESS() || (usb_poll_validate_length() )) {
-                               DbpString("Stopped");
-                               return;
+                       //only check every 1000th time (usb_poll_validate_length on some systems was too slow)
+                       if ( ii == 1000 ) {
+                               if (BUTTON_PRESS() || usb_poll_validate_length() ) {
+                                       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+                                       DbpString("Stopped");
+                                       return;
+                               }
+                               ii=0;

                        }
                        WDT_HIT();
                        }
                        WDT_HIT();

+                       ii++;

                }
                if (ledcontrol)
                        LED_D_ON();
                }
                if (ledcontrol)
                        LED_D_ON();


@@ -425,13 +426,20 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 
                if (ledcontrol)
                        LED_D_OFF();
 
                if (ledcontrol)
                        LED_D_OFF();

+               ii=0;

                //wait until SSC_CLK goes LOW
                while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) {
                //wait until SSC_CLK goes LOW
                while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) {

-                       if(BUTTON_PRESS()) {
-                               DbpString("Stopped");
-                               return;
+                       //only check every 1000th time (usb_poll_validate_length on some systems was too slow)
+                       if ( ii == 1000 ) { 
+                               if (BUTTON_PRESS() || usb_poll_validate_length() ) {
+                                       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+                                       DbpString("Stopped");
+                                       return;
+                               }
+                               ii=0;

                        }
                        WDT_HIT();
                        }
                        WDT_HIT();

+                       ii++;

                }
 
                i++;
                }
 
                i++;


@@ -443,6 +451,7 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
                                SpinDelayUs(gap);
                        }
                }
                                SpinDelayUs(gap);
                        }
                }

+

        }
 }
 
        }
 }
 


@@ -549,6 +558,9 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
                DbpString("Tags can only have 44 bits. - USE lf simfsk for larger tags");
                return;
        }
                DbpString("Tags can only have 44 bits. - USE lf simfsk for larger tags");
                return;
        }

+       // set LF so we don't kill the bigbuf we are setting with simulation data.
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+

        fc(0,&n);
        // special start of frame marker containing invalid bit sequences
        fc(8,  &n);     fc(8,  &n); // invalid
        fc(0,&n);
        // special start of frame marker containing invalid bit sequences
        fc(8,  &n);     fc(8,  &n); // invalid


@@ -599,6 +611,9 @@ void CmdFSKsimTAG(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
        uint8_t clk = arg2 & 0xFF;
        uint8_t invert = (arg2 >> 8) & 1;
 
        uint8_t clk = arg2 & 0xFF;
        uint8_t invert = (arg2 >> 8) & 1;
 

+       // set LF so we don't kill the bigbuf we are setting with simulation data.
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+

        for (i=0; i<size; i++){
                if (BitStream[i] == invert){
                        fcAll(fcLow, &n, clk, &modCnt);
        for (i=0; i<size; i++){
                if (BitStream[i] == invert){
                        fcAll(fcLow, &n, clk, &modCnt);


@@ -649,6 +664,19 @@ static void biphaseSimBit(uint8_t c, int *n, uint8_t clock, uint8_t *phase)
                memset(dest+(*n), c ^ *phase, clock);
                *phase ^= 1;
        }
                memset(dest+(*n), c ^ *phase, clock);
                *phase ^= 1;
        }

+       *n += clock;
+}
+
+static void stAskSimBit(int *n, uint8_t clock) {
+       uint8_t *dest = BigBuf_get_addr();
+       uint8_t halfClk = clock/2;
+       //ST = .5 high .5 low 1.5 high .5 low 1 high    
+       memset(dest+(*n), 1, halfClk);
+       memset(dest+(*n) + halfClk, 0, halfClk);
+       memset(dest+(*n) + clock, 1, clock + halfClk);
+       memset(dest+(*n) + clock*2 + halfClk, 0, halfClk);
+       memset(dest+(*n) + clock*3, 1, clock);
+       *n += clock*4;

 }
 
 // args clock, ask/man or askraw, invert, transmission separator
 }
 
 // args clock, ask/man or askraw, invert, transmission separator


@@ -661,12 +689,15 @@ void CmdASKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
        uint8_t separator = arg2 & 1;
        uint8_t invert = (arg2 >> 8) & 1;
 
        uint8_t separator = arg2 & 1;
        uint8_t invert = (arg2 >> 8) & 1;
 

+       // set LF so we don't kill the bigbuf we are setting with simulation data.
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+

        if (encoding==2){  //biphase
                uint8_t phase=0;
                for (i=0; i<size; i++){
                        biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
                }
        if (encoding==2){  //biphase
                uint8_t phase=0;
                for (i=0; i<size; i++){
                        biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
                }

-               if (BitStream[0]==BitStream[size-1]){ //run a second set inverted to keep phase in check
+               if (phase==1) { //run a second set inverted to keep phase in check

                        for (i=0; i<size; i++){
                                biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
                        }
                        for (i=0; i<size; i++){
                                biphaseSimBit(BitStream[i]^invert, &n, clk, &phase);
                        }


@@ -675,14 +706,16 @@ void CmdASKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
                for (i=0; i<size; i++){
                        askSimBit(BitStream[i]^invert, &n, clk, encoding);
                }
                for (i=0; i<size; i++){
                        askSimBit(BitStream[i]^invert, &n, clk, encoding);
                }

-               if (encoding==0 && BitStream[0]==BitStream[size-1]){ //run a second set inverted (for biphase phase)
+               if (encoding==0 && BitStream[0]==BitStream[size-1]){ //run a second set inverted (for ask/raw || biphase phase)

                        for (i=0; i<size; i++){
                                askSimBit(BitStream[i]^invert^1, &n, clk, encoding);
                        }
                }
        }
                        for (i=0; i<size; i++){
                                askSimBit(BitStream[i]^invert^1, &n, clk, encoding);
                        }
                }
        }

-       
-       if (separator==1) Dbprintf("sorry but separator option not yet available"); 
+       if (separator==1 && encoding == 1)
+               stAskSimBit(&n, clk);
+       else if (separator==1)
+               Dbprintf("sorry but separator option not yet available");

 
        Dbprintf("Simulating with clk: %d, invert: %d, encoding: %d, separator: %d, n: %d",clk, invert, encoding, separator, n);
        //DEBUG
 
        Dbprintf("Simulating with clk: %d, invert: %d, encoding: %d, separator: %d, n: %d",clk, invert, encoding, separator, n);
        //DEBUG


@@ -692,14 +725,10 @@ void CmdASKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
        //Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
        //i+=16;
        //Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
        //Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
        //i+=16;
        //Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);

-
-       if (ledcontrol)
-               LED_A_ON();

        
        

+       if (ledcontrol) LED_A_ON();

        SimulateTagLowFrequency(n, 0, ledcontrol);
        SimulateTagLowFrequency(n, 0, ledcontrol);

-
-       if (ledcontrol)
-               LED_A_OFF();
+       if (ledcontrol) LED_A_OFF();

 }
 
 //carrier can be 2,4 or 8
 }
 
 //carrier can be 2,4 or 8


@@ -734,6 +763,9 @@ void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
        uint8_t carrier = arg1 & 0xFF;
        uint8_t invert = arg2 & 0xFF;
        uint8_t curPhase = 0;
        uint8_t carrier = arg1 & 0xFF;
        uint8_t invert = arg2 & 0xFF;
        uint8_t curPhase = 0;

+       // set LF so we don't kill the bigbuf we are setting with simulation data.
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+

        for (i=0; i<size; i++){
                if (BitStream[i] == curPhase){
                        pskSimBit(carrier, &n, clk, &curPhase, FALSE);
        for (i=0; i<size; i++){
                if (BitStream[i] == curPhase){
                        pskSimBit(carrier, &n, clk, &curPhase, FALSE);


@@ -749,12 +781,9 @@ void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
        //i+=16;
        //Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
                   
        //i+=16;
        //Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]);
                   

-       if (ledcontrol)
-               LED_A_ON();
+       if (ledcontrol) LED_A_ON();

        SimulateTagLowFrequency(n, 0, ledcontrol);
        SimulateTagLowFrequency(n, 0, ledcontrol);

-
-       if (ledcontrol)
-               LED_A_OFF();
+       if (ledcontrol) LED_A_OFF();

 }
 
 // loop to get raw HID waveform then FSK demodulate the TAG ID from it
 }
 
 // loop to get raw HID waveform then FSK demodulate the TAG ID from it


@@ -765,9 +794,13 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
        size_t size; 
        uint32_t hi2=0, hi=0, lo=0;
        int idx=0;
        size_t size; 
        uint32_t hi2=0, hi=0, lo=0;
        int idx=0;

+       int dummyIdx = 0;

        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 

+       //clear read buffer
+       BigBuf_Clear_keep_EM();
+

        while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
 
                WDT_HIT();
        while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
 
                WDT_HIT();


@@ -777,7 +810,7 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
                // FSK demodulator
                //size = sizeOfBigBuff;  //variable size will change after demod so re initialize it before use
                size = 50*128*2; //big enough to catch 2 sequences of largest format
                // FSK demodulator
                //size = sizeOfBigBuff;  //variable size will change after demod so re initialize it before use
                size = 50*128*2; //big enough to catch 2 sequences of largest format

-               idx = HIDdemodFSK(dest, &size, &hi2, &hi, &lo);
+               idx = HIDdemodFSK(dest, &size, &hi2, &hi, &lo, &dummyIdx);

                
                if (idx>0 && lo>0 && (size==96 || size==192)){
                        // go over previously decoded manchester data and decode into usable tag ID
                
                if (idx>0 && lo>0 && (size==96 || size==192)){
                        // go over previously decoded manchester data and decode into usable tag ID


@@ -836,13 +869,15 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
                                if (ledcontrol) LED_A_OFF();
                                *high = hi;
                                *low = lo;
                                if (ledcontrol) LED_A_OFF();
                                *high = hi;
                                *low = lo;

-                               return;
+                               break;

                        }
                        // reset
                }
                hi2 = hi = lo = idx = 0;
                WDT_HIT();
        }
                        }
                        // reset
                }
                hi2 = hi = lo = idx = 0;
                WDT_HIT();
        }

+
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }


@@ -851,9 +886,10 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 {
        uint8_t *dest = BigBuf_get_addr();
 void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 {
        uint8_t *dest = BigBuf_get_addr();

-       //const size_t sizeOfBigBuff = BigBuf_max_traceLen();

        size_t size; 
        size_t size; 

-       int idx=0;
+       int idx=0, dummyIdx=0;
+       //clear read buffer
+       BigBuf_Clear_keep_EM();

        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 


@@ -864,75 +900,75 @@ void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 
                DoAcquisition_default(-1,true);
                // FSK demodulator
 
                DoAcquisition_default(-1,true);
                // FSK demodulator

-               //size = sizeOfBigBuff;  //variable size will change after demod so re initialize it before use

                size = 50*128*2; //big enough to catch 2 sequences of largest format
                size = 50*128*2; //big enough to catch 2 sequences of largest format

-               idx = AWIDdemodFSK(dest, &size);
+               idx = AWIDdemodFSK(dest, &size, &dummyIdx);

                
                

-               if (idx>0 && size==96){
-               // Index map
-               // 0            10            20            30              40            50              60
-               // |            |             |             |               |             |               |
-               // 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
-               // -----------------------------------------------------------------------------
-               // 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
-               // premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
-               //          |---26 bit---|    |-----117----||-------------142-------------|
-               // b = format bit len, o = odd parity of last 3 bits
-               // f = facility code, c = card number
-               // w = wiegand parity
-               // (26 bit format shown)
-
-               //get raw ID before removing parities
-               uint32_t rawLo = bytebits_to_byte(dest+idx+64,32);
-               uint32_t rawHi = bytebits_to_byte(dest+idx+32,32);
-               uint32_t rawHi2 = bytebits_to_byte(dest+idx,32);
-
-               size = removeParity(dest, idx+8, 4, 1, 88);
-               // ok valid card found!
-
-               // Index map
-               // 0           10         20        30          40        50        60
-               // |           |          |         |           |         |         |
-               // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
-               // -----------------------------------------------------------------------------
-               // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
-               // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
-               // |26 bit|   |-117--| |-----142------|
-               // b = format bit len, o = odd parity of last 3 bits
-               // f = facility code, c = card number
-               // w = wiegand parity
-               // (26 bit format shown)
-
-               uint32_t fc = 0;
-               uint32_t cardnum = 0;
-               uint32_t code1 = 0;
-               uint32_t code2 = 0;
-               uint8_t fmtLen = bytebits_to_byte(dest,8);
-               if (fmtLen==26){
-                       fc = bytebits_to_byte(dest+9, 8);
-                       cardnum = bytebits_to_byte(dest+17, 16);
-                       code1 = bytebits_to_byte(dest+8,fmtLen);
-                       Dbprintf("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
-               } else {
-                       cardnum = bytebits_to_byte(dest+8+(fmtLen-17), 16);
-                       if (fmtLen>32){
-                        code1 = bytebits_to_byte(dest+8,fmtLen-32);
-                        code2 = bytebits_to_byte(dest+8+(fmtLen-32),32);
-                        Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
-                } else{
-                        code1 = bytebits_to_byte(dest+8,fmtLen);
-                        Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
-                }
-                       }
-                       if (findone){
-                               if (ledcontrol) LED_A_OFF();
-                               return;
+               if (idx<=0 || size!=96) continue;
+               // Index map
+               // 0            10            20            30              40            50              60
+               // |            |             |             |               |             |               |
+               // 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
+               // -----------------------------------------------------------------------------
+               // 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
+               // premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
+               //          |---26 bit---|    |-----117----||-------------142-------------|
+               // b = format bit len, o = odd parity of last 3 bits
+               // f = facility code, c = card number
+               // w = wiegand parity
+               // (26 bit format shown)
+
+               //get raw ID before removing parities
+               uint32_t rawLo = bytebits_to_byte(dest+idx+64,32);
+               uint32_t rawHi = bytebits_to_byte(dest+idx+32,32);
+               uint32_t rawHi2 = bytebits_to_byte(dest+idx,32);
+
+               size = removeParity(dest, idx+8, 4, 1, 88);
+               if (size != 66) continue;
+               // ok valid card found!
+
+               // Index map
+               // 0           10         20        30          40        50        60
+               // |           |          |         |           |         |         |
+               // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
+               // -----------------------------------------------------------------------------
+               // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
+               // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+               // |26 bit|   |-117--| |-----142------|
+               // b = format bit len, o = odd parity of last 3 bits
+               // f = facility code, c = card number
+               // w = wiegand parity
+               // (26 bit format shown)
+
+               uint32_t fc = 0;
+               uint32_t cardnum = 0;
+               uint32_t code1 = 0;
+               uint32_t code2 = 0;
+               uint8_t fmtLen = bytebits_to_byte(dest,8);
+               if (fmtLen==26){
+                       fc = bytebits_to_byte(dest+9, 8);
+                       cardnum = bytebits_to_byte(dest+17, 16);
+                       code1 = bytebits_to_byte(dest+8,fmtLen);
+                       Dbprintf("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
+               } else {
+                       cardnum = bytebits_to_byte(dest+8+(fmtLen-17), 16);
+                       if (fmtLen>32){
+                               code1 = bytebits_to_byte(dest+8,fmtLen-32);
+                               code2 = bytebits_to_byte(dest+8+(fmtLen-32),32);
+                               Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
+                       } else{
+                               code1 = bytebits_to_byte(dest+8,fmtLen);
+                               Dbprintf("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);

                        }
                        }

-                       // reset

                }
                }

+               if (findone){
+                       if (ledcontrol) LED_A_OFF();
+                       break;
+               }
+               // reset

                idx = 0;
                WDT_HIT();
        }
                idx = 0;
                WDT_HIT();
        }

+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }


@@ -945,6 +981,8 @@ void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
        int clk=0, invert=0, errCnt=0, maxErr=20;
        uint32_t hi=0;
        uint64_t lo=0;
        int clk=0, invert=0, errCnt=0, maxErr=20;
        uint32_t hi=0;
        uint64_t lo=0;

+       //clear read buffer
+       BigBuf_Clear_keep_EM();

        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 


@@ -985,13 +1023,14 @@ void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
                                if (ledcontrol) LED_A_OFF();
                                *high=lo>>32;
                                *low=lo & 0xFFFFFFFF;
                                if (ledcontrol) LED_A_OFF();
                                *high=lo>>32;
                                *low=lo & 0xFFFFFFFF;

-                               return;
+                               break;

                        }
                }
                WDT_HIT();
                hi = lo = size = idx = 0;
                clk = invert = errCnt = 0;
        }
                        }
                }
                WDT_HIT();
                hi = lo = size = idx = 0;
                clk = invert = errCnt = 0;
        }

+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }


@@ -1004,6 +1043,9 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
        uint8_t version=0;
        uint8_t facilitycode=0;
        uint16_t number=0;
        uint8_t version=0;
        uint8_t facilitycode=0;
        uint16_t number=0;

+       int dummyIdx=0;
+       //clear read buffer
+       BigBuf_Clear_keep_EM();

        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 


@@ -1013,7 +1055,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                DoAcquisition_default(-1,true);
                //fskdemod and get start index
                WDT_HIT();
                DoAcquisition_default(-1,true);
                //fskdemod and get start index
                WDT_HIT();

-               idx = IOdemodFSK(dest, BigBuf_max_traceLen());
+               idx = IOdemodFSK(dest, BigBuf_max_traceLen(), &dummyIdx);

                if (idx<0) continue;
                //valid tag found
 
                if (idx<0) continue;
                //valid tag found
 


@@ -1048,7 +1090,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                        //LED_A_OFF();
                        *high=code;
                        *low=code2;
                        //LED_A_OFF();
                        *high=code;
                        *low=code2;

-                       return;
+                       break;

                }
                code=code2=0;
                version=facilitycode=0;
                }
                code=code2=0;
                version=facilitycode=0;


@@ -1057,6 +1099,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 
                WDT_HIT();
        }
 
                WDT_HIT();
        }

+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }


@@ -1064,11 +1107,8 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 /*------------------------------
  * T5555/T5557/T5567/T5577 routines
  *------------------------------
 /*------------------------------
  * T5555/T5557/T5567/T5577 routines
  *------------------------------

- */
-
-/* NOTE: T55x7/T5555 configuration register definitions moved to protocols.h */
-
-/*
+ * NOTE: T55x7/T5555 configuration register definitions moved to protocols.h
+ *

  * Relevant communication times in microsecond
  * To compensate antenna falling times shorten the write times
  * and enlarge the gap ones.
  * Relevant communication times in microsecond
  * To compensate antenna falling times shorten the write times
  * and enlarge the gap ones.


@@ -1083,7 +1123,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 void TurnReadLFOn(int delay) {
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
        // Give it a bit of time for the resonant antenna to settle.
 void TurnReadLFOn(int delay) {
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
        // Give it a bit of time for the resonant antenna to settle.

-       SpinDelayUs(delay); //155*8 //50*8
+       WaitUS(delay); //155*8 //50*8

 }
 
 // Write one bit to card
 }
 
 // Write one bit to card


@@ -1093,31 +1133,33 @@ void T55xxWriteBit(int bit) {
        else
                TurnReadLFOn(WRITE_1);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        else
                TurnReadLFOn(WRITE_1);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       SpinDelayUs(WRITE_GAP);
+       WaitUS(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();
        //clear buffer now so it does not interfere with timing later
 }
 
 // Send T5577 reset command then read stream (see if we can identify the start of the stream)
 void T55xxResetRead(void) {
        LED_A_ON();
        //clear buffer now so it does not interfere with timing later

-       BigBuf_Clear_ext(false);
+       BigBuf_Clear_keep_EM();

 
        // Set up FPGA, 125kHz
        LFSetupFPGAForADC(95, true);
 
        // Set up FPGA, 125kHz
        LFSetupFPGAForADC(95, true);

-
+       StartTicks();
+       // make sure tag is fully powered up...
+       WaitMS(5);
+       

        // Trigger T55x7 in mode.
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        // Trigger T55x7 in mode.
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       SpinDelayUs(START_GAP);
+       WaitUS(START_GAP);

 
        // reset tag - op code 00
        T55xxWriteBit(0);
        T55xxWriteBit(0);
 
 
        // reset tag - op code 00
        T55xxWriteBit(0);
        T55xxWriteBit(0);
 

-       // Turn field on to read the response

        TurnReadLFOn(READ_GAP);
 
        // Acquisition
        TurnReadLFOn(READ_GAP);
 
        // Acquisition

-       doT55x7Acquisition(BigBuf_max_traceLen());
+       DoPartialAcquisition(0, true, BigBuf_max_traceLen());

 
        // Turn the field off
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
 
        // Turn the field off
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off


@@ -1130,19 +1172,24 @@ 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;
        LED_A_ON();
        bool PwdMode = arg & 0x1;
        uint8_t Page = (arg & 0x2)>>1;

+       bool testMode = arg & 0x4;

        uint32_t i = 0;
 
        // Set up FPGA, 125kHz
        LFSetupFPGAForADC(95, true);
        uint32_t i = 0;
 
        // Set up FPGA, 125kHz
        LFSetupFPGAForADC(95, true);

-
+       StartTicks();
+       // make sure tag is fully powered up...
+       WaitMS(5);

        // Trigger T55x7 in mode.
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        // Trigger T55x7 in mode.
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       SpinDelayUs(START_GAP);
+       WaitUS(START_GAP);

 
 

-       // Opcode 10
-       T55xxWriteBit(1);
-       T55xxWriteBit(Page); //Page 0
-       if (PwdMode){
+       if (testMode) Dbprintf("TestMODE");
+       // Std Opcode 10
+       T55xxWriteBit(testMode ? 0 : 1);
+       T55xxWriteBit(testMode ? 1 : Page); //Page 0
+
+       if (PwdMode) {

                // Send Pwd
                for (i = 0x80000000; i != 0; i >>= 1)
                        T55xxWriteBit(Pwd & i);
                // Send Pwd
                for (i = 0x80000000; i != 0; i >>= 1)
                        T55xxWriteBit(Pwd & i);


@@ -1160,11 +1207,31 @@ void T55xxWriteBlockExt(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg
 
        // Perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,
        // so wait a little more)
 
        // Perform write (nominal is 5.6 ms for T55x7 and 18ms for E5550,
        // so wait a little more)

-       TurnReadLFOn(20 * 1000);
+
+       // "there is a clock delay before programming" 
+       //  - programming takes ~5.6ms for t5577 ~18ms for E5550 or t5567
+       //  so we should wait 1 clock + 5.6ms then read response? 
+       //  but we need to know we are dealing with t5577 vs t5567 vs e5550 (or q5) marshmellow...
+       if (testMode) {
+               //TESTMODE TIMING TESTS: 
+               // <566us does nothing 
+               // 566-568 switches between wiping to 0s and doing nothing
+               // 5184 wipes and allows 1 block to be programmed.
+               // indefinite power on wipes and then programs all blocks with bitshifted data sent.
+               TurnReadLFOn(5184); 
+
+       } else {
+               TurnReadLFOn(20 * 1000);

                //could attempt to do a read to confirm write took
                // as the tag should repeat back the new block 
                // until it is reset, but to confirm it we would 
                //could attempt to do a read to confirm write took
                // as the tag should repeat back the new block 
                // until it is reset, but to confirm it we would 

-               // need to know the current block 0 config mode
+               // need to know the current block 0 config mode for
+               // modulation clock an other details to demod the response...
+               // response should be (for t55x7) a 0 bit then (ST if on) 
+               // block data written in on repeat until reset. 
+
+               //DoPartialAcquisition(20, true, 12000);
+       }

 
        // turn field off
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 
        // turn field off
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);


@@ -1183,7 +1250,7 @@ void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
        bool PwdMode = arg0 & 0x1;
        uint8_t Page = (arg0 & 0x2) >> 1;
        uint32_t i = 0;
        bool PwdMode = arg0 & 0x1;
        uint8_t Page = (arg0 & 0x2) >> 1;
        uint32_t i = 0;

-       bool RegReadMode = (Block == 0xFF);
+       bool RegReadMode = (Block == 0xFF);//regular read mode

 
        //clear buffer now so it does not interfere with timing later
        BigBuf_Clear_ext(false);
 
        //clear buffer now so it does not interfere with timing later
        BigBuf_Clear_ext(false);


@@ -1193,10 +1260,12 @@ void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
 
        // Set up FPGA, 125kHz to power up the tag
        LFSetupFPGAForADC(95, true);
 
        // Set up FPGA, 125kHz to power up the tag
        LFSetupFPGAForADC(95, true);

-
+       StartTicks();
+       // make sure tag is fully powered up...
+       WaitMS(5);

        // Trigger T55x7 Direct Access Mode with start gap
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        // Trigger T55x7 Direct Access Mode with start gap
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       SpinDelayUs(START_GAP);
+       WaitUS(START_GAP);

 
        // Opcode 1[page]
        T55xxWriteBit(1);
 
        // Opcode 1[page]
        T55xxWriteBit(1);


@@ -1216,10 +1285,13 @@ void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
                        T55xxWriteBit(Block & i);               
 
        // Turn field on to read the response
                        T55xxWriteBit(Block & i);               
 
        // Turn field on to read the response

-       TurnReadLFOn(READ_GAP);
+       // 137*8 seems to get to the start of data pretty well... 
+       //  but we want to go past the start and let the repeating data settle in...
+       TurnReadLFOn(210*8); 

 
        // Acquisition
 
        // Acquisition

-       doT55x7Acquisition(12000);
+       // Now do the acquisition
+       DoPartialAcquisition(0, true, 12000);

 
        // Turn the field off
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
 
        // Turn the field off
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off


@@ -1233,10 +1305,13 @@ void T55xxWakeUp(uint32_t Pwd){
        
        // Set up FPGA, 125kHz
        LFSetupFPGAForADC(95, true);
        
        // Set up FPGA, 125kHz
        LFSetupFPGAForADC(95, true);

+       StartTicks();
+       // make sure tag is fully powered up...
+       WaitMS(5);

        
        // Trigger T55x7 Direct Access Mode
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        
        // Trigger T55x7 Direct Access Mode
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       SpinDelayUs(START_GAP);
+       WaitUS(START_GAP);

        
        // Opcode 10
        T55xxWriteBit(1);
        
        // Opcode 10
        T55xxWriteBit(1);


@@ -1255,7 +1330,6 @@ 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+startblock; i > startblock; i--) {
 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+startblock; i > startblock; i--) {

-               //Dbprintf("write- Blk: %d, d:%08X",i-1,blockdata[i-1]);

                T55xxWriteBlockExt(blockdata[i-1],i-1,0,0);
        }
 }
                T55xxWriteBlockExt(blockdata[i-1],i-1,0,0);
        }
 }


@@ -1263,7 +1337,6 @@ void WriteT55xx(uint32_t *blockdata, uint8_t startblock, uint8_t numblocks) {
 // Copy HID id to card and setup block 0 config
 void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
        uint32_t data[] = {0,0,0,0,0,0,0};
 // Copy HID id to card and setup block 0 config
 void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
        uint32_t data[] = {0,0,0,0,0,0,0};

-       //int data1=0, data2=0, data3=0, data4=0, data5=0, data6=0; //up to six blocks for long format

        uint8_t last_block = 0;
 
        if (longFMT) {
        uint8_t last_block = 0;
 
        if (longFMT) {


@@ -1344,15 +1417,24 @@ void CopyIndala224toT55x7(uint32_t uid1, uint32_t uid2, uint32_t uid3, uint32_t
        //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 
        //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 

-       //Config for Indala (RF/32;PSK1 with RF/2;Maxblock=7)
-       data[0] = T55x7_BITRATE_RF_32 | T55x7_MODULATION_PSK1 | (7 << T55x7_MAXBLOCK_SHIFT);
+       //Config for Indala (RF/32;PSK2 with RF/2;Maxblock=7)
+       data[0] = T55x7_BITRATE_RF_32 | T55x7_MODULATION_PSK2 | (7 << T55x7_MAXBLOCK_SHIFT);

        //TODO add selection of chip for Q5 or T55x7
        //TODO add selection of chip for Q5 or T55x7

-       // data[0] = (((32-2)/2)<<T5555_BITRATE_SHIFT) | T5555_MODULATION_PSK1 | 7 << T5555_MAXBLOCK_SHIFT;
+       // data[0] = (((32-2)>>1)<<T5555_BITRATE_SHIFT) | T5555_MODULATION_PSK2 | 7 << T5555_MAXBLOCK_SHIFT;

        WriteT55xx(data, 0, 8);
        //Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=7;Inverse data)
        //      T5567WriteBlock(0x603E10E2,0);
        DbpString("DONE!");
 }
        WriteT55xx(data, 0, 8);
        //Alternative config for Indala (Extended mode;RF/32;PSK1 with RF/2;Maxblock=7;Inverse data)
        //      T5567WriteBlock(0x603E10E2,0);
        DbpString("DONE!");
 }

+// clone viking tag to T55xx
+void CopyVikingtoT55xx(uint32_t block1, uint32_t block2, uint8_t Q5) {
+       uint32_t data[] = {T55x7_BITRATE_RF_32 | T55x7_MODULATION_MANCHESTER | (2 << T55x7_MAXBLOCK_SHIFT), block1, block2};
+       if (Q5) data[0] = T5555_SET_BITRATE(32) | T5555_MODULATION_MANCHESTER | 2 << T5555_MAXBLOCK_SHIFT;
+       // Program the data blocks for supplied ID and the block 0 config
+       WriteT55xx(data, 0, 3);
+       LED_D_OFF();
+       cmd_send(CMD_ACK,0,0,0,0,0);
+}

 
 // Define 9bit header for EM410x tags
 #define EM410X_HEADER            0x1FF
 
 // Define 9bit header for EM410x tags
 #define EM410X_HEADER            0x1FF


@@ -1418,7 +1500,7 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo) {
        LED_D_ON();
 
        // Write EM410x ID
        LED_D_ON();
 
        // Write EM410x ID

-       uint32_t data[] = {0, id>>32, id & 0xFFFFFFFF};
+       uint32_t data[] = {0, (uint32_t)(id>>32), (uint32_t)(id & 0xFFFFFFFF)};

 
        clock = (card & 0xFF00) >> 8;
        clock = (clock == 0) ? 64 : clock;
 
        clock = (card & 0xFF00) >> 8;
        clock = (clock == 0) ? 64 : clock;


@@ -1431,8 +1513,7 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo) {
                }
                data[0] = clock | T55x7_MODULATION_MANCHESTER | (2 << T55x7_MAXBLOCK_SHIFT);
        } else { //t5555 (Q5)
                }
                data[0] = clock | T55x7_MODULATION_MANCHESTER | (2 << T55x7_MAXBLOCK_SHIFT);
        } else { //t5555 (Q5)

-               clock = (clock-2)>>1;  //n = (RF-2)/2
-               data[0] = (clock << T5555_BITRATE_SHIFT) | T5555_MODULATION_MANCHESTER | (2 << T5555_MAXBLOCK_SHIFT);
+               data[0] = T5555_SET_BITRATE(clock) | T5555_MODULATION_MANCHESTER | (2 << T5555_MAXBLOCK_SHIFT);

        }
 
        WriteT55xx(data, 0, 3);
        }
 
        WriteT55xx(data, 0, 3);


@@ -1450,7 +1531,6 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo) {
 #define FWD_CMD_READ 0x9
 #define FWD_CMD_DISABLE 0x5
 
 #define FWD_CMD_READ 0x9
 #define FWD_CMD_DISABLE 0x5
 

-

 uint8_t forwardLink_data[64]; //array of forwarded bits
 uint8_t * forward_ptr; //ptr for forward message preparation
 uint8_t fwd_bit_sz; //forwardlink bit counter
 uint8_t forwardLink_data[64]; //array of forwarded bits
 uint8_t * forward_ptr; //ptr for forward message preparation
 uint8_t fwd_bit_sz; //forwardlink bit counter


@@ -1470,7 +1550,6 @@ uint8_t * fwd_write_ptr; //forwardlink bit pointer
 //  WRITE_0 = 23*8 , 9*8  SpinDelayUs(23*8); 
 
 uint8_t Prepare_Cmd( uint8_t cmd ) {
 //  WRITE_0 = 23*8 , 9*8  SpinDelayUs(23*8); 
 
 uint8_t Prepare_Cmd( uint8_t cmd ) {

-       //--------------------------------------------------------------------

 
        *forward_ptr++ = 0; //start bit
        *forward_ptr++ = 0; //second pause for 4050 code
 
        *forward_ptr++ = 0; //start bit
        *forward_ptr++ = 0; //second pause for 4050 code


@@ -1490,10 +1569,7 @@ uint8_t Prepare_Cmd( uint8_t cmd ) {
 // prepares address bits
 // see EM4469 spec
 //====================================================================
 // prepares address bits
 // see EM4469 spec
 //====================================================================

-
-//--------------------------------------------------------------------

 uint8_t Prepare_Addr( uint8_t addr ) {
 uint8_t Prepare_Addr( uint8_t addr ) {

-       //--------------------------------------------------------------------

 
        register uint8_t line_parity;
 
 
        register uint8_t line_parity;
 


@@ -1514,10 +1590,7 @@ uint8_t Prepare_Addr( uint8_t addr ) {
 // prepares data bits intreleaved with parity bits
 // see EM4469 spec
 //====================================================================
 // prepares data bits intreleaved with parity bits
 // see EM4469 spec
 //====================================================================

-
-//--------------------------------------------------------------------

 uint8_t Prepare_Data( uint16_t data_low, uint16_t data_hi) {
 uint8_t Prepare_Data( uint16_t data_low, uint16_t data_hi) {

-       //--------------------------------------------------------------------

 
        register uint8_t line_parity;
        register uint8_t column_parity;
 
        register uint8_t line_parity;
        register uint8_t column_parity;


@@ -1559,31 +1632,27 @@ void SendForward(uint8_t fwd_bit_count) {
        fwd_write_ptr = forwardLink_data;
        fwd_bit_sz = fwd_bit_count;
 
        fwd_write_ptr = forwardLink_data;
        fwd_bit_sz = fwd_bit_count;
 

-       LED_D_ON();
-
-       // Set up FPGA, 125kHz
+       // Set up FPGA, 125kHz or 95 divisor

        LFSetupFPGAForADC(95, true);
 
        // force 1st mod pulse (start gap must be longer for 4305)
        fwd_bit_sz--; //prepare next bit modulation
        fwd_write_ptr++;
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        LFSetupFPGAForADC(95, true);
 
        // force 1st mod pulse (start gap must be longer for 4305)
        fwd_bit_sz--; //prepare next bit modulation
        fwd_write_ptr++;
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off

-       SpinDelayUs(55*8); //55 cycles off (8us each)for 4305
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+       WaitUS(55*8); //55 cycles off (8us each)for 4305  //another reader has 37 here...

        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on

-       SpinDelayUs(16*8); //16 cycles on (8us each)
+       WaitUS(18*8); //18 cycles on (8us each)

 
        // now start writting
        while(fwd_bit_sz-- > 0) { //prepare next bit modulation
                if(((*fwd_write_ptr++) & 1) == 1)
 
        // now start writting
        while(fwd_bit_sz-- > 0) { //prepare next bit modulation
                if(((*fwd_write_ptr++) & 1) == 1)

-                       SpinDelayUs(32*8); //32 cycles at 125Khz (8us each)
+                       WaitUS(32*8); //32 cycles at 125Khz (8us each)

                else {
                        //These timings work for 4469/4269/4305 (with the 55*8 above)
                        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
                else {
                        //These timings work for 4469/4269/4305 (with the 55*8 above)
                        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off

-                       SpinDelayUs(23*8); //16-4 cycles off (8us each)
-                       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+                       WaitUS(23*8); //23 cycles off (8us each)

                        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on
                        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);//field on

-                       SpinDelayUs(9*8); //16 cycles on (8us each)
+                       WaitUS(18*8); //18 cycles on (8us each)

                }
        }
 }
                }
        }
 }


@@ -1600,19 +1669,17 @@ void EM4xLogin(uint32_t Password) {
 
        //Wait for command to complete
        SpinDelay(20);
 
        //Wait for command to complete
        SpinDelay(20);

-

 }
 
 void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
 
        uint8_t fwd_bit_count;
 }
 
 void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
 
        uint8_t fwd_bit_count;

-       uint8_t *dest = BigBuf_get_addr();
-       uint16_t bufferlength = BigBuf_max_traceLen();
-       uint32_t i = 0;

 
        // Clear destination buffer before sending the command
 
        // Clear destination buffer before sending the command

-       memset(dest, 0x80, bufferlength);
+       BigBuf_Clear_ext(false);

 
 

+       LED_A_ON();
+       StartTicks();

        //If password mode do login
        if (PwdMode == 1) EM4xLogin(Pwd);
 
        //If password mode do login
        if (PwdMode == 1) EM4xLogin(Pwd);
 


@@ -1620,36 +1687,29 @@ void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
        fwd_bit_count = Prepare_Cmd( FWD_CMD_READ );
        fwd_bit_count += Prepare_Addr( Address );
 
        fwd_bit_count = Prepare_Cmd( FWD_CMD_READ );
        fwd_bit_count += Prepare_Addr( Address );
 

-       // Connect the A/D to the peak-detected low-frequency path.
-       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
-       // Now set up the SSC to get the ADC samples that are now streaming at us.
-       FpgaSetupSsc();
-

        SendForward(fwd_bit_count);
        SendForward(fwd_bit_count);

-
+       WaitUS(400);

        // Now do the acquisition
        // Now do the acquisition

-       i = 0;
-       for(;;) {
-               if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
-                       AT91C_BASE_SSC->SSC_THR = 0x43;
-               }
-               if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
-                       dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       i++;
-                       if (i >= bufferlength) break;
-               }
-       }
+       DoPartialAcquisition(20, true, 6000);
+       

        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off

+       LED_A_OFF();

        cmd_send(CMD_ACK,0,0,0,0,0);
        cmd_send(CMD_ACK,0,0,0,0,0);

-       LED_D_OFF();

 }
 
 }
 

-void EM4xWriteWord(uint32_t Data, uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
-
+void EM4xWriteWord(uint32_t flag, uint32_t Data, uint32_t Pwd) {
+       
+       bool PwdMode = (flag & 0xF);
+       uint8_t Address = (flag >> 8) & 0xFF;

        uint8_t fwd_bit_count;
 
        uint8_t fwd_bit_count;
 

+       //clear buffer now so it does not interfere with timing later
+       BigBuf_Clear_ext(false);
+
+       LED_A_ON();
+       StartTicks();

        //If password mode do login
        //If password mode do login

-       if (PwdMode == 1) EM4xLogin(Pwd);
+       if (PwdMode) EM4xLogin(Pwd);

 
        forward_ptr = forwardLink_data;
        fwd_bit_count = Prepare_Cmd( FWD_CMD_WRITE );
 
        forward_ptr = forwardLink_data;
        fwd_bit_count = Prepare_Cmd( FWD_CMD_WRITE );


@@ -1659,7 +1719,72 @@ void EM4xWriteWord(uint32_t Data, uint8_t Address, uint32_t Pwd, uint8_t PwdMode
        SendForward(fwd_bit_count);
 
        //Wait for write to complete
        SendForward(fwd_bit_count);
 
        //Wait for write to complete

-       SpinDelay(20);
+       //SpinDelay(10);
+
+       WaitUS(6500);
+       //Capture response if one exists
+       DoPartialAcquisition(20, true, 6000);
+

        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off

-       LED_D_OFF();
+       LED_A_OFF();
+       cmd_send(CMD_ACK,0,0,0,0,0);
+}
+/*
+Reading a COTAG.
+
+COTAG needs the reader to send a startsequence and the card has an extreme slow datarate.
+because of this, we can "sample" the data signal but we interpreate it to Manchester direct.
+
+READER START SEQUENCE:
+burst 800 us,    gap   2.2 msecs
+burst 3.6 msecs  gap   2.2 msecs
+burst 800 us     gap   2.2 msecs
+pulse 3.6 msecs
+
+This triggers a COTAG tag to response
+*/
+void Cotag(uint32_t arg0) {
+
+#define OFF     { FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); WaitUS(2035); }
+#define ON(x)   { FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD); WaitUS((x)); }
+
+       uint8_t rawsignal = arg0 & 0xF;
+
+       LED_A_ON();
+
+       // Switching to LF image on FPGA. This might empty BigBuff
+       FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+
+       //clear buffer now so it does not interfere with timing later
+       BigBuf_Clear_ext(false);
+
+       // Set up FPGA, 132kHz to power up the tag
+       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);
+
+       // Now set up the SSC to get the ADC samples that are now streaming at us.
+       FpgaSetupSsc();
+
+       // start clock - 1.5ticks is 1us
+       StartTicks();
+
+       //send COTAG start pulse
+       ON(740)  OFF
+       ON(3330) OFF
+       ON(740)  OFF
+       ON(1000)
+
+       switch(rawsignal) {
+               case 0: doCotagAcquisition(50000); break;
+               case 1: doCotagAcquisitionManchester(); break;
+               case 2: DoAcquisition_config(true, 0); break;
+       }
+
+       // Turn the field off
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
+       cmd_send(CMD_ACK,0,0,0,0,0);
+       LED_A_OFF();

 }
 }