Merge branch 'master' of github.com:Proxmark/proxmark3

diff --git a/armsrc/apps.h b/armsrc/apps.h
index ce721525d5cf91bd53fe2022169837c21ec77728..5a1ab6902220cdc28a128d81b4e579b1951ce439 100644 (file)
--- a/armsrc/apps.h
+++ b/armsrc/apps.h
@@ -37,6 +37,25 @@ uint32_t BigBuf[BIGBUF_SIZE / sizeof(uint32_t)];
 #define FREE_BUFFER_OFFSET             (CARD_MEMORY_OFFSET + CARD_MEMORY_SIZE)
 #define FREE_BUFFER_SIZE               (BIGBUF_SIZE - FREE_BUFFER_OFFSET - 1)
 
+/*
+The statements above translates into this :
+BIGBUF_SIZE         = 40000
+TRACE_OFFSET        = 0
+TRACE_SIZE          = 3000
+RECV_CMD_OFFSET     = 3000
+MAX_FRAME_SIZE      = 256
+MAX_PARITY_SIZE     = 32
+RECV_CMD_PAR_OFFSET = 3256
+RECV_RESP_OFFSET    = 3288
+RECV_RESP_PAR_OFFSET= 3544
+CARD_MEMORY_OFFSET  = 3576
+CARD_MEMORY_SIZE    = 4096
+DMA_BUFFER_OFFSET   = 3576
+DMA_BUFFER_SIZE     = 4096
+FREE_BUFFER_OFFSET  = 7672
+FREE_BUFFER_SIZE    = 32327
+ */
+
 extern const uint8_t OddByteParity[256];
 extern uint8_t *trace; // = (uint8_t *) BigBuf;
 extern int traceLen;   // = 0;
@@ -115,6 +134,8 @@ void SetAdcMuxFor(uint32_t whichGpio);
 #define FPGA_HF_SIMULATOR_MODULATE_BPSK                                (1<<0)
 #define FPGA_HF_SIMULATOR_MODULATE_212K                                (2<<0)
 #define FPGA_HF_SIMULATOR_MODULATE_424K                                (4<<0)
+#define FPGA_HF_SIMULATOR_MODULATE_424K_8BIT           0x5//101
+
 // Options for ISO14443A
 #define FPGA_HF_ISO14443A_SNIFFER                              (0<<0)
 #define FPGA_HF_ISO14443A_TAGSIM_LISTEN                                (1<<0)

diff --git a/armsrc/iclass.c b/armsrc/iclass.c
index ea9af7d4f4fa11c9b84f15d4a8ea0ee6314bd02f..72cfbefc38717548a9f71b7da3ec1276bfa9fcfa 100644 (file)
--- a/armsrc/iclass.c
+++ b/armsrc/iclass.c
@@ -687,7 +687,8 @@ void RAMFUNC SnoopIClass(void)
     SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 
        uint32_t time_0 = GetCountSspClk();
-
+       uint32_t time_start = 0;
+       uint32_t time_stop  = 0;
 
     int div = 0;
     //int div2 = 0;
@@ -738,6 +739,7 @@ void RAMFUNC SnoopIClass(void)
                smpl = decbyter;        
                if(OutOfNDecoding((smpl & 0xF0) >> 4)) {
                    rsamples = samples - Uart.samples;
+                       time_stop = (GetCountSspClk()-time_0) << 4;
                    LED_C_ON();
 
                        //if(!LogTrace(Uart.output,Uart.byteCnt, rsamples, Uart.parityBits,TRUE)) break;
@@ -745,7 +747,7 @@ void RAMFUNC SnoopIClass(void)
                        if(tracing)     {
                                uint8_t parity[MAX_PARITY_SIZE];
                                GetParity(Uart.output, Uart.byteCnt, parity);
-                               LogTrace(Uart.output,Uart.byteCnt, (GetCountSspClk()-time_0) << 4, (GetCountSspClk()-time_0) << 4, parity, TRUE);
+                               LogTrace(Uart.output,Uart.byteCnt, time_start, time_stop, parity, TRUE);
                        }
 
 
@@ -756,6 +758,8 @@ void RAMFUNC SnoopIClass(void)
                    Demod.state = DEMOD_UNSYNCD;
                    LED_B_OFF();
                    Uart.byteCnt = 0;
+               }else{
+                       time_start = (GetCountSspClk()-time_0) << 4;
                }
                decbyter = 0;
        }
@@ -763,21 +767,24 @@ void RAMFUNC SnoopIClass(void)
        if(div > 3) {
                smpl = decbyte;
                if(ManchesterDecoding(smpl & 0x0F)) {
-                   rsamples = samples - Demod.samples;
+                       time_stop = (GetCountSspClk()-time_0) << 4;
+
+                       rsamples = samples - Demod.samples;
                    LED_B_ON();
 
                        if(tracing)     {
                                uint8_t parity[MAX_PARITY_SIZE];
                                GetParity(Demod.output, Demod.len, parity);
-                               LogTrace(Demod.output, Demod.len, (GetCountSspClk()-time_0) << 4, (GetCountSspClk()-time_0) << 4, parity, FALSE);
+                               LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, FALSE);
                        }
 
-
                    // And ready to receive another response.
                    memset(&Demod, 0, sizeof(Demod));
                        Demod.output = tagToReaderResponse;
                    Demod.state = DEMOD_UNSYNCD;
                    LED_C_OFF();
+               }else{
+                       time_start = (GetCountSspClk()-time_0) << 4;
                }
                
                div = 0;
@@ -850,57 +857,93 @@ static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
     }
 }
 
+static uint8_t encode4Bits(const uint8_t b)
+{
+       uint8_t c = b & 0xF;
+       // OTA, the least significant bits first
+       //         The columns are
+       //               1 - Bit value to send
+       //               2 - Reversed (big-endian)
+       //               3 - Encoded
+       //               4 - Hex values
+
+       switch(c){
+       //                          1       2         3         4
+         case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55
+         case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95
+         case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65
+         case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5
+         case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59
+         case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99
+         case 9:  return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69
+         case 8:  return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9
+         case 7:  return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56
+         case 6:  return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96
+         case 5:  return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66
+         case 4:  return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6
+         case 3:  return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a
+         case 2:  return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a
+         case 1:  return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a
+         default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa
+
+       }
+}
 
 //-----------------------------------------------------------------------------
 // Prepare tag messages
 //-----------------------------------------------------------------------------
 static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
 {
-       //So far a dummy implementation, not used
-       //int lastProxToAirDuration =0;
+
+       /*
+        * SOF comprises 3 parts;
+        * * An unmodulated time of 56.64 us
+        * * 24 pulses of 423.75 KHz (fc/32)
+        * * A logic 1, which starts with an unmodulated time of 18.88us
+        *   followed by 8 pulses of 423.75kHz (fc/32)
+        *
+        *
+        * EOF comprises 3 parts:
+        * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated
+        *   time of 18.88us.
+        * - 24 pulses of fc/32
+        * - An unmodulated time of 56.64 us
+        *
+        *
+        * A logic 0 starts with 8 pulses of fc/32
+        * followed by an unmodulated time of 256/fc (~18,88us).
+        *
+        * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by
+        * 8 pulses of fc/32 (also 18.88us)
+        *
+        * The mode FPGA_HF_SIMULATOR_MODULATE_424K_8BIT which we use to simulate tag,
+        * works like this.
+        * - A 1-bit input to the FPGA becomes 8 pulses on 423.5kHz (fc/32) (18.88us).
+        * - A 0-bit inptu to the FPGA becomes an unmodulated time of 18.88us
+        *
+        * In thist mode the SOF can be written as 00011101 = 0x1D
+        * The EOF can be written as 10111000 = 0xb8
+        * A logic 1 is 01
+        * A logic 0 is 10
+        *
+        * */
+
        int i;
 
        ToSendReset();
 
        // Send SOF
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0xff;//Proxtoair duration starts here
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0xff;
+       ToSend[++ToSendMax] = 0x1D;
 
        for(i = 0; i < len; i++) {
-               int j;
                uint8_t b = cmd[i];
-
-               // Data bits
-               for(j = 0; j < 8; j++) {
-                       if(b & 1) {
-                               ToSend[++ToSendMax] = 0x00;
-                               ToSend[++ToSendMax] = 0xff;
-                       } else {
-                               ToSend[++ToSendMax] = 0xff;
-                               ToSend[++ToSendMax] = 0x00;
-                       }
-                       b >>= 1;
-               }
+               ToSend[++ToSendMax] = encode4Bits(b & 0xF); //Least significant half
+               ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF);//Most significant half
        }
 
        // Send EOF
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0xff;     
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-
+       ToSend[++ToSendMax] = 0xB8;
        //lastProxToAirDuration  = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end
-
        // Convert from last byte pos to length
        ToSendMax++;
 }
@@ -913,21 +956,13 @@ static void CodeIClassTagSOF()
 
        ToSendReset();
        // Send SOF
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0xff;
-       ToSend[++ToSendMax] = 0x00;
-       ToSend[++ToSendMax] = 0xff;
-
+       ToSend[++ToSendMax] = 0x1D;
 //     lastProxToAirDuration  = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning
 
-       
        // Convert from last byte pos to length
        ToSendMax++;
 }
+
 int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf);
 /**
  * @brief SimulateIClass simulates an iClass card.
@@ -963,7 +998,7 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
        else if(simType == 2)
        {
 
-               uint8_t mac_responses[64] = { 0 };
+               uint8_t mac_responses[USB_CMD_DATA_SIZE] = { 0 };
                Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS);
                // In this mode, a number of csns are within datain. We'll simulate each one, one at a time
                // in order to collect MAC's from the reader. This can later be used in an offlne-attack
@@ -976,6 +1011,7 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
                        memcpy(csn_crc, datain+(i*8), 8);
                        if(doIClassSimulation(csn_crc,1,mac_responses+i*8))
                        {
+                               cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
                                return; // Button pressed
                        }
                }
@@ -997,7 +1033,9 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
  */
 int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf)
 {
+
        // CSN followed by two CRC bytes
+       uint8_t response1[] = { 0x0F} ;
        uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0};
        memcpy(response3,csn,sizeof(response3));
@@ -1020,29 +1058,29 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
        // Reader 81 anticoll. CSN
        // Tag    CSN
 
-       uint8_t *resp;
-       int respLen;
-       uint8_t* respdata = NULL;
-       int respsize = 0;
-       uint8_t sof = 0x0f;
+       uint8_t *modulated_response;
+       int modulated_response_size;
+       uint8_t* trace_data = NULL;
+       int trace_data_size = 0;
+       //uint8_t sof = 0x0f;
 
-       // Respond SOF -- takes 8 bytes
+       // Respond SOF -- takes 1 bytes
        uint8_t *resp1 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET);
        int resp1Len;
 
        // Anticollision CSN (rotated CSN)
-       // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)
-       uint8_t *resp2 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 10);
+       // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
+       uint8_t *resp2 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 2);
        int resp2Len;
 
        // CSN
-       // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)
-       uint8_t *resp3 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 190);
+       // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
+       uint8_t *resp3 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 30);
        int resp3Len;
 
        // e-Purse
-       // 144: Takes 16 bytes for SOF/EOF and 8 * 16 = 128 bytes (2 bytes/bit)
-       uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 370);
+       // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/byte)
+       uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 60);
        int resp4Len;
 
        // + 1720..
@@ -1089,11 +1127,6 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
        LED_A_ON();
        bool buttonPressed = false;
 
-       /** Hack  for testing
-       memcpy(reader_mac_buf,csn,8);
-       exitLoop = true;
-       end hack **/
-
        while(!exitLoop) {
 
                LED_B_OFF();
@@ -1112,35 +1145,35 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                // Okay, look at the command now.
                if(receivedCmd[0] == 0x0a ) {
                        // Reader in anticollission phase
-                       resp = resp1; respLen = resp1Len; //order = 1;
-                       respdata = &sof;
-                       respsize = sizeof(sof);
+                       modulated_response = resp1; modulated_response_size = resp1Len; //order = 1;
+                       trace_data = response1;
+                       trace_data_size = sizeof(response1);
                } else if(receivedCmd[0] == 0x0c) {
                        // Reader asks for anticollission CSN
-                       resp = resp2; respLen = resp2Len; //order = 2;
-                       respdata = response2;
-                       respsize = sizeof(response2);
+                       modulated_response = resp2; modulated_response_size = resp2Len; //order = 2;
+                       trace_data = response2;
+                       trace_data_size = sizeof(response2);
                        //DbpString("Reader requests anticollission CSN:");
                } else if(receivedCmd[0] == 0x81) {
                        // Reader selects anticollission CSN.
                        // Tag sends the corresponding real CSN
-                       resp = resp3; respLen = resp3Len; //order = 3;
-                       respdata = response3;
-                       respsize = sizeof(response3);
+                       modulated_response = resp3; modulated_response_size = resp3Len; //order = 3;
+                       trace_data = response3;
+                       trace_data_size = sizeof(response3);
                        //DbpString("Reader selects anticollission CSN:");
                } else if(receivedCmd[0] == 0x88) {
                        // Read e-purse (88 02)
-                       resp = resp4; respLen = resp4Len; //order = 4;
-                       respdata = response4;
-                       respsize = sizeof(response4);
+                       modulated_response = resp4; modulated_response_size = resp4Len; //order = 4;
+                       trace_data = response4;
+                       trace_data_size = sizeof(response4);
                        LED_B_ON();
                } else if(receivedCmd[0] == 0x05) {
                        // Reader random and reader MAC!!!
                        // Do not respond
             // We do not know what to answer, so lets keep quiet
-                       resp = resp1; respLen = 0; //order = 5;
-                       respdata = NULL;
-                       respsize = 0;
+                       modulated_response = resp1; modulated_response_size = 0; //order = 5;
+                       trace_data = NULL;
+                       trace_data_size = 0;
                        if (breakAfterMacReceived){
                                // dbprintf:ing ...
                                Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x"
@@ -1157,9 +1190,9 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                        }
                } else if(receivedCmd[0] == 0x00 && len == 1) {
                        // Reader ends the session
-                       resp = resp1; respLen = 0; //order = 0;
-                       respdata = NULL;
-                       respsize = 0;
+                       modulated_response = resp1; modulated_response_size = 0; //order = 0;
+                       trace_data = NULL;
+                       trace_data_size = 0;
                } else {
                        //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44
                        // Never seen this command before
@@ -1169,9 +1202,9 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                        receivedCmd[3], receivedCmd[4], receivedCmd[5],
                        receivedCmd[6], receivedCmd[7], receivedCmd[8]);
                        // Do not respond
-                       resp = resp1; respLen = 0; //order = 0;
-                       respdata = NULL;
-                       respsize = 0;
+                       modulated_response = resp1; modulated_response_size = 0; //order = 0;
+                       trace_data = NULL;
+                       trace_data_size = 0;
                }
 
                if(cmdsRecvd >  100) {
@@ -1181,9 +1214,16 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                else {
                        cmdsRecvd++;
                }
-
-               if(respLen > 0) {
-                       SendIClassAnswer(resp, respLen, 21);
+               /**
+               After changes to parity calculation
+               Time between reader EOT and pm3 SOF
+               delay   21 -> 480uS
+               delay   10 -> 220us
+               delay   16 -> 388us
+               A legit tag has about 380us.
+               **/
+               if(modulated_response_size > 0) {
+                       SendIClassAnswer(modulated_response, modulated_response_size, 1);
                        t2r_time = GetCountSspClk();
                }
 
@@ -1192,9 +1232,9 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                        GetParity(receivedCmd, len, parity);
                        LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, (r2t_time-time_0) << 4, parity, TRUE);
 
-                       if (respdata != NULL) {
-                               GetParity(respdata, respsize, parity);
-                               LogTrace(respdata, respsize, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, FALSE);
+                       if (trace_data != NULL) {
+                               GetParity(trace_data, trace_data_size, parity);
+                               LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, FALSE);
                        }
                        if(!tracing) {
                                DbpString("Trace full");
@@ -1208,6 +1248,8 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
        //Dbprintf("%x", cmdsRecvd);
        LED_A_OFF();
        LED_B_OFF();
+       LED_C_OFF();
+
        if(buttonPressed)
        {
                DbpString("Button pressed");
@@ -1220,7 +1262,8 @@ static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
        int i = 0, d=0;//, u = 0, d = 0;
        uint8_t b = 0;
 
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K);
+       //FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K_8BIT);
 
        AT91C_BASE_SSC->SSC_THR = 0x00;
        FpgaSetupSsc();
@@ -1244,7 +1287,8 @@ static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
                        AT91C_BASE_SSC->SSC_THR = b;
                }
 
-               if (i > respLen +4) break;
+//             if (i > respLen +4) break;
+               if (i > respLen +1) break;
        }
 
        return 0;

diff --git a/fpga/fpga_hf.bit b/fpga/fpga_hf.bit
index 5389428c5539eb60eee9f27b6956ca950aa79b15..8b0c7a3788ef438c94eaed81346a08f24927f954 100644 (file)
Binary files a/fpga/fpga_hf.bit and b/fpga/fpga_hf.bit differ

diff --git a/fpga/fpga_lf.bit b/fpga/fpga_lf.bit
index e942921a8685731cbcf0e7bb6f86a11ea629dd0c..51b0681cd6a082550a19dccd794ff40439e393f9 100644 (file)
Binary files a/fpga/fpga_lf.bit and b/fpga/fpga_lf.bit differ

diff --git a/fpga/hi_simulate.v b/fpga/hi_simulate.v
index c04ade80b098a474218fa8693c537ebe17729a14..0768c29de0dcd0204d0692acc9b23486a98d26a2 100644 (file)
--- a/fpga/hi_simulate.v
+++ b/fpga/hi_simulate.v
@@ -50,12 +50,38 @@ begin
     else if(~(| adc_d[7:5])) after_hysteresis = 1'b0;
 end
 
+
 // Divide 13.56 MHz by 32 to produce the SSP_CLK
 // The register is bigger to allow higher division factors of up to /128
-reg [6:0] ssp_clk_divider;
+reg [10:0] ssp_clk_divider;
+
 always @(posedge adc_clk)
     ssp_clk_divider <= (ssp_clk_divider + 1);
-assign ssp_clk = ssp_clk_divider[4];
+
+reg ssp_clk;
+reg ssp_frame;
+always @(negedge adc_clk)
+begin
+    //If we're in 101, we only need a new bit every 8th carrier bit (53Hz). Otherwise, get next bit at 424Khz
+    if(mod_type == 3'b101)
+    begin
+       if(ssp_clk_divider[7:0] == 8'b00000000)
+           ssp_clk <= 1'b0;
+       if(ssp_clk_divider[7:0] == 8'b10000000)
+           ssp_clk <= 1'b1;
+
+    end
+    else
+    begin
+       if(ssp_clk_divider[4:0] == 5'd0)//[4:0] == 5'b00000)
+           ssp_clk <= 1'b1;
+       if(ssp_clk_divider[4:0] == 5'd16) //[4:0] == 5'b10000)
+           ssp_clk <= 1'b0;
+    end
+end
+
+
+//assign ssp_clk = ssp_clk_divider[4];
 
 // Divide SSP_CLK by 8 to produce the byte framing signal; the phase of
 // this is arbitrary, because it's just a bitstream.
@@ -69,12 +95,13 @@ reg [2:0] ssp_frame_divider_from_arm;
 always @(negedge ssp_clk)
     ssp_frame_divider_from_arm <= (ssp_frame_divider_from_arm + 1);
 
-reg ssp_frame;
+
+
 always @(ssp_frame_divider_to_arm or ssp_frame_divider_from_arm or mod_type)
     if(mod_type == 3'b000) // not modulating, so listening, to ARM
         ssp_frame = (ssp_frame_divider_to_arm == 3'b000);
     else
-        ssp_frame = (ssp_frame_divider_from_arm == 3'b000);
+       ssp_frame = (ssp_frame_divider_from_arm == 3'b000);
 
 // Synchronize up the after-hysteresis signal, to produce DIN.
 reg ssp_din;
@@ -90,7 +117,7 @@ always @(mod_type or ssp_clk or ssp_dout)
         modulating_carrier <= ssp_dout ^ ssp_clk_divider[3]; // XOR means BPSK
     else if(mod_type == 3'b010)
        modulating_carrier <= ssp_dout & ssp_clk_divider[5]; // switch 212kHz subcarrier on/off
-    else if(mod_type == 3'b100)
+    else if(mod_type == 3'b100 || mod_type == 3'b101)
        modulating_carrier <= ssp_dout & ssp_clk_divider[4]; // switch 424kHz modulation on/off
     else
         modulating_carrier <= 1'b0;                           // yet unused
@@ -106,7 +133,7 @@ assign pwr_oe4 = modulating_carrier;
 // This one is always on, so that we can watch the carrier.
 assign pwr_oe3 = 1'b0;
 
-assign dbg = after_hysteresis;
+assign dbg = modulating_carrier;
 //reg dbg;
 //always @(ssp_dout)
 //    dbg <= ssp_dout;