]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/lfops.c
ADD: @pwpivi 's latest fixes for bigbuff
[proxmark3-svn] / armsrc / lfops.c
index 7e53d4a566173d97301f9e56ee1e5ad01a1ca15e..1b3e8e30061bdf1c79427b1b0d8123f8385593d8 100644 (file)
@@ -379,7 +379,7 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
        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)
@@ -756,7 +756,7 @@ void CmdHIDdemodFSK(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 = 0
        uint32_t hi2=0, hi=0, lo=0;
        int idx=0;
        // Configure to go in 125Khz listen mode
@@ -866,24 +866,24 @@ void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
 
                if (errCnt<0) continue;
        
-               errCnt = Em410xDecode(dest, &size, &idx, &hi, &lo);
-               if (errCnt){
-                       if (size>64){
-                               Dbprintf("EM XL TAG ID: %06x%08x%08x - (%05d_%03d_%08d)",
-                                 hi,
-                                 (uint32_t)(lo>>32),
-                                 (uint32_t)lo,
-                                 (uint32_t)(lo&0xFFFF),
-                                 (uint32_t)((lo>>16LL) & 0xFF),
-                                 (uint32_t)(lo & 0xFFFFFF));
-                       } else {
-                               Dbprintf("EM TAG ID: %02x%08x - (%05d_%03d_%08d)",
-                                 (uint32_t)(lo>>32),
-                                 (uint32_t)lo,
-                                 (uint32_t)(lo&0xFFFF),
-                                 (uint32_t)((lo>>16LL) & 0xFF),
-                                 (uint32_t)(lo & 0xFFFFFF));
-                       }
+                       errCnt = Em410xDecode(dest, &size, &idx, &hi, &lo);
+                       if (errCnt){
+                               if (size>64){
+                                       Dbprintf("EM XL TAG ID: %06x%08x%08x - (%05d_%03d_%08d)",
+                                         hi,
+                                         (uint32_t)(lo>>32),
+                                         (uint32_t)lo,
+                                         (uint32_t)(lo&0xFFFF),
+                                         (uint32_t)((lo>>16LL) & 0xFF),
+                                         (uint32_t)(lo & 0xFFFFFF));
+                               } else {
+                                       Dbprintf("EM TAG ID: %02x%08x - (%05d_%03d_%08d)",
+                                         (uint32_t)(lo>>32),
+                                         (uint32_t)lo,
+                                         (uint32_t)(lo&0xFFFF),
+                                         (uint32_t)((lo>>16LL) & 0xFF),
+                                         (uint32_t)(lo & 0xFFFFFF));
+                               }
 
                        if (findone){
                                if (ledcontrol) LED_A_OFF();
@@ -908,6 +908,8 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
        uint8_t version=0;
        uint8_t facilitycode=0;
        uint16_t number=0;
+       uint8_t crc = 0;
+       uint16_t calccrc = 0;
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
@@ -919,45 +921,62 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
                WDT_HIT();
                idx = IOdemodFSK(dest, BigBuf_max_traceLen());
                if (idx<0) continue;
-               //valid tag found
-
-               //Index map
-               //0           10          20          30          40          50          60
-               //|           |           |           |           |           |           |
-               //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
-               //-----------------------------------------------------------------------------
-               //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
-               //
-               //XSF(version)facility:codeone+codetwo
-               //Handle the data
-               if(findone){ //only print binary if we are doing one
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx],   dest[idx+1],   dest[idx+2],dest[idx+3],dest[idx+4],dest[idx+5],dest[idx+6],dest[idx+7],dest[idx+8]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+9], dest[idx+10],dest[idx+11],dest[idx+12],dest[idx+13],dest[idx+14],dest[idx+15],dest[idx+16],dest[idx+17]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+18],dest[idx+19],dest[idx+20],dest[idx+21],dest[idx+22],dest[idx+23],dest[idx+24],dest[idx+25],dest[idx+26]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+27],dest[idx+28],dest[idx+29],dest[idx+30],dest[idx+31],dest[idx+32],dest[idx+33],dest[idx+34],dest[idx+35]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+36],dest[idx+37],dest[idx+38],dest[idx+39],dest[idx+40],dest[idx+41],dest[idx+42],dest[idx+43],dest[idx+44]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+45],dest[idx+46],dest[idx+47],dest[idx+48],dest[idx+49],dest[idx+50],dest[idx+51],dest[idx+52],dest[idx+53]);
-                       Dbprintf("%d%d%d%d%d%d%d%d %d%d",dest[idx+54],dest[idx+55],dest[idx+56],dest[idx+57],dest[idx+58],dest[idx+59],dest[idx+60],dest[idx+61],dest[idx+62],dest[idx+63]);
-               }
-               code = bytebits_to_byte(dest+idx,32);
-               code2 = bytebits_to_byte(dest+idx+32,32);
-               version = bytebits_to_byte(dest+idx+27,8); //14,4
+                       //valid tag found
+
+                       //Index map
+                       //0           10          20          30          40          50          60
+                       //|           |           |           |           |           |           |
+                       //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
+                       //-----------------------------------------------------------------------------
+            //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 checksum 11
+                       //
+                       //Checksum:  
+                       //00000000 0 11110000 1 11100000 1 00000001 1 00000011 1 10110110 1 01110101 11
+                       //preamble      F0         E0         01         03         B6         75
+                       // How to calc checksum,
+                       // http://www.proxmark.org/forum/viewtopic.php?id=364&p=6
+                       //   F0 + E0 + 01 + 03 + B6 = 28A
+                       //   28A & FF = 8A
+                       //   FF - 8A = 75
+                       // Checksum: 0x75
+                       //XSF(version)facility:codeone+codetwo
+                       //Handle the data
+                       if(findone){ //only print binary if we are doing one
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx],   dest[idx+1],   dest[idx+2],dest[idx+3],dest[idx+4],dest[idx+5],dest[idx+6],dest[idx+7],dest[idx+8]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+9], dest[idx+10],dest[idx+11],dest[idx+12],dest[idx+13],dest[idx+14],dest[idx+15],dest[idx+16],dest[idx+17]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+18],dest[idx+19],dest[idx+20],dest[idx+21],dest[idx+22],dest[idx+23],dest[idx+24],dest[idx+25],dest[idx+26]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+27],dest[idx+28],dest[idx+29],dest[idx+30],dest[idx+31],dest[idx+32],dest[idx+33],dest[idx+34],dest[idx+35]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+36],dest[idx+37],dest[idx+38],dest[idx+39],dest[idx+40],dest[idx+41],dest[idx+42],dest[idx+43],dest[idx+44]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+45],dest[idx+46],dest[idx+47],dest[idx+48],dest[idx+49],dest[idx+50],dest[idx+51],dest[idx+52],dest[idx+53]);
+                               Dbprintf("%d%d%d%d%d%d%d%d %d%d",dest[idx+54],dest[idx+55],dest[idx+56],dest[idx+57],dest[idx+58],dest[idx+59],dest[idx+60],dest[idx+61],dest[idx+62],dest[idx+63]);
+                       }
+                       code = bytebits_to_byte(dest+idx,32);
+                       code2 = bytebits_to_byte(dest+idx+32,32);
+                       version = bytebits_to_byte(dest+idx+27,8); //14,4
                facilitycode = bytebits_to_byte(dest+idx+18,8);
-               number = (bytebits_to_byte(dest+idx+36,8)<<8)|(bytebits_to_byte(dest+idx+45,8)); //36,9
-
-               Dbprintf("XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2);
-               // if we're only looking for one tag
-               if (findone){
-                       if (ledcontrol) LED_A_OFF();
-                       //LED_A_OFF();
-                       *high=code;
-                       *low=code2;
-                       return;
-               }
-               code=code2=0;
-               version=facilitycode=0;
-               number=0;
-               idx=0;
+                       number = (bytebits_to_byte(dest+idx+36,8)<<8)|(bytebits_to_byte(dest+idx+45,8)); //36,9
+
+                       crc = bytebits_to_byte(dest+idx+54,8);
+                       for (uint8_t i=1; i<6; ++i)
+                               calccrc += bytebits_to_byte(dest+idx+9*i,8);
+                       calccrc &= 0xff;
+                       calccrc = 0xff - calccrc;
+                       
+                       char *crcStr = (crc == calccrc) ? "ok":"!crc";
+
+            Dbprintf("IO Prox XSF(%02d)%02x:%05d (%08x%08x)  [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
+                       // if we're only looking for one tag
+                       if (findone){
+                               if (ledcontrol) LED_A_OFF();
+                               //LED_A_OFF();
+                               *high=code;
+                               *low=code2;
+                               return;
+                       }
+                       code=code2=0;
+                       version=facilitycode=0;
+                       number=0;
+                       idx=0;
 
                WDT_HIT();
        }
@@ -1029,6 +1048,20 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
 #define WRITE_0   18*8 // was 144 // SPEC: 16*8 to 32*8 - typ 24*8 (or 24fc)
 #define WRITE_1   50*8 // was 400 // SPEC: 48*8 to 64*8 - typ 56*8 (or 56fc)  432 for T55x7; 448 for E5550
 
+//  VALUES TAKEN FROM EM4x function: SendForward
+//  START_GAP = 440;       (55*8) cycles at 125Khz (8us = 1cycle)
+//  WRITE_GAP = 128;       (16*8)
+//  WRITE_1   = 256 32*8;  (32*8) 
+
+//  These timings work for 4469/4269/4305 (with the 55*8 above)
+//  WRITE_0 = 23*8 , 9*8  SpinDelayUs(23*8); 
+
+// Sam7s has several timers, we will use the source TIMER_CLOCK1 (aka AT91C_TC_CLKS_TIMER_DIV1_CLOCK)
+// TIMER_CLOCK1 = MCK/2, MCK is running at 48 MHz, Timer is running at 48/2 = 24 MHz
+// Hitag units (T0) have duration of 8 microseconds (us), which is 1/125000 per second (carrier)
+// T0 = TIMER_CLOCK1 / 125000 = 192
+// 1 Cycle = 8 microseconds(us)
+
 #define T55xx_SAMPLES_SIZE      12000 // 32 x 32 x 10  (32 bit times numofblock (7), times clock skip..)
 
 // Write one bit to card
@@ -1037,7 +1070,7 @@ void T55xxWriteBit(int bit)
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
-       if (bit == 0)
+       if (!bit)
                SpinDelayUs(WRITE_0);
        else
                SpinDelayUs(WRITE_1);
@@ -1491,10 +1524,16 @@ void CopyIndala224toT55x7(int uid1, int uid2, int uid3, int uid4, int uid5, int
 #define max(x,y) ( x<y ? y:x)
 
 int DemodPCF7931(uint8_t **outBlocks) {
-       uint8_t BitStream[256];
-       uint8_t Blocks[8][16];
-       uint8_t *GraphBuffer = BigBuf_get_addr();
+
+    uint8_t bits[256] = {0x00};
+       uint8_t blocks[8][16];
+    uint8_t *dest = BigBuf_get_addr();
+    
        int GraphTraceLen = BigBuf_max_traceLen();
+       if (  GraphTraceLen > 18000 )
+               GraphTraceLen = 18000;
+       
+       
        int i, j, lastval, bitidx, half_switch;
        int clock = 64;
        int tolerance = clock / 8;
@@ -1505,8 +1544,7 @@ int DemodPCF7931(uint8_t **outBlocks) {
        uint8_t dir;
 
        LFSetupFPGAForADC(95, true);
-       DoAcquisition_default(0, 0);
-
+       DoAcquisition_default(0, true);
 
        lmin = 64;
        lmax = 192;
@@ -1514,9 +1552,9 @@ int DemodPCF7931(uint8_t **outBlocks) {
        i = 2;
 
        /* Find first local max/min */
-       if(GraphBuffer[1] > GraphBuffer[0]) {
+    if(dest[1] > dest[0]) {
                while(i < GraphTraceLen) {
-                       if( !(GraphBuffer[i] > GraphBuffer[i-1]) && GraphBuffer[i] > lmax)
+            if( !(dest[i] > dest[i-1]) && dest[i] > lmax)
                                break;
                        i++;
                }
@@ -1524,7 +1562,7 @@ int DemodPCF7931(uint8_t **outBlocks) {
        }
        else {
                while(i < GraphTraceLen) {
-                       if( !(GraphBuffer[i] < GraphBuffer[i-1]) && GraphBuffer[i] < lmin)
+            if( !(dest[i] < dest[i-1]) && dest[i] < lmin)
                                break;
                        i++;
                }
@@ -1538,7 +1576,7 @@ int DemodPCF7931(uint8_t **outBlocks) {
 
        for (bitidx = 0; i < GraphTraceLen; i++)
        {
-               if ( (GraphBuffer[i-1] > GraphBuffer[i] && dir == 1 && GraphBuffer[i] > lmax) || (GraphBuffer[i-1] < GraphBuffer[i] && dir == 0 && GraphBuffer[i] < lmin))
+        if ( (dest[i-1] > dest[i] && dir == 1 && dest[i] > lmax) || (dest[i-1] < dest[i] && dir == 0 && dest[i] < lmin))
                {
                        lc = i - lastval;
                        lastval = i;
@@ -1567,14 +1605,14 @@ int DemodPCF7931(uint8_t **outBlocks) {
                                        block_done = 1;
                                }
                                else if(half_switch == 1) {
-                                       BitStream[bitidx++] = 0;
+                    bits[bitidx++] = 0;
                                        half_switch = 0;
                                }
                                else
                                        half_switch++;
                        } else if (abs(lc-clock) < tolerance) {
                                // 64TO
-                               BitStream[bitidx++] = 1;
+                bits[bitidx++] = 1;
                        } else {
                                // Error
                                warnings++;
@@ -1588,14 +1626,15 @@ int DemodPCF7931(uint8_t **outBlocks) {
                        if(block_done == 1) {
                                if(bitidx == 128) {
                                        for(j=0; j<16; j++) {
-                                               Blocks[num_blocks][j] = 128*BitStream[j*8+7]+
-                                                               64*BitStream[j*8+6]+
-                                                               32*BitStream[j*8+5]+
-                                                               16*BitStream[j*8+4]+
-                                                               8*BitStream[j*8+3]+
-                                                               4*BitStream[j*8+2]+
-                                                               2*BitStream[j*8+1]+
-                                                               BitStream[j*8];
+                        blocks[num_blocks][j] = 128*bits[j*8+7]+
+                                64*bits[j*8+6]+
+                                32*bits[j*8+5]+
+                                16*bits[j*8+4]+
+                                8*bits[j*8+3]+
+                                4*bits[j*8+2]+
+                                2*bits[j*8+1]+
+                                bits[j*8];
+                                               
                                        }
                                        num_blocks++;
                                }
@@ -1604,17 +1643,14 @@ int DemodPCF7931(uint8_t **outBlocks) {
                                half_switch = 0;
                        }
                        if(i < GraphTraceLen)
-                       {
-                               if (GraphBuffer[i-1] > GraphBuffer[i]) dir=0;
-                               else dir = 1;
-                       }
+                dir =(dest[i-1] > dest[i]) ? 0 : 1;
                }
                if(bitidx==255)
                        bitidx=0;
                warnings = 0;
                if(num_blocks == 4) break;
        }
-       memcpy(outBlocks, Blocks, 16*num_blocks);
+    memcpy(outBlocks, blocks, 16*num_blocks);
        return num_blocks;
 }
 
@@ -1912,9 +1948,14 @@ void EM4xLogin(uint32_t Password) {
 
 void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
 
-       uint8_t fwd_bit_count;
        uint8_t *dest = BigBuf_get_addr();
-       int m=0, i=0;
+       uint16_t bufferlength = BigBuf_max_traceLen();
+       uint32_t i = 0;
+
+       // Clear destination buffer before sending the command  0x80 = average.
+       memset(dest, 0x80, bufferlength);
+       
+    uint8_t fwd_bit_count;
 
        //If password mode do login
        if (PwdMode == 1) EM4xLogin(Pwd);
@@ -1923,9 +1964,6 @@ 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 );
 
-       m = BigBuf_max_traceLen();
-       // Clear destination buffer before sending the command
-       memset(dest, 128, m);
        // 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.
@@ -1941,10 +1979,12 @@ void EM4xReadWord(uint8_t Address, uint32_t Pwd, uint8_t PwdMode) {
                }
                if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
                        dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       i++;
-                       if (i >= m) break;
+                       ++i;
+                       if (i >= bufferlength) break;
                }
        }
+  
+       cmd_send(CMD_ACK,0,0,0,0,0);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
        LED_D_OFF();
 }
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