Merge pull request #57 from iceman1001/feature

[proxmark3-svn] / client / cmddata.c

diff --git a/client/cmddata.c b/client/cmddata.c
index 25d752f6a47eacf28a7ca827011a2e6aee31de26..430afb174b9cee1b1f64da2f37ba3fb8e8ee4374 100644 (file)
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -21,6 +21,8 @@
 #include "cmdmain.h"
 #include "cmddata.h"
 #include "lfdemod.h"
 #include "cmdmain.h"
 #include "cmddata.h"
 #include "lfdemod.h"

+#include "usb_cmd.h"
+

 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
 uint8_t g_debugMode;
 int DemodBufferLen;
 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
 uint8_t g_debugMode;
 int DemodBufferLen;


@@ -569,6 +571,43 @@ int CmdDec(const char *Cmd)
   RepaintGraphWindow();
   return 0;
 }
   RepaintGraphWindow();
   return 0;
 }

+/**
+ * Undecimate - I'd call it 'interpolate', but we'll save that
+ * name until someone does an actual interpolation command, not just
+ * blindly repeating samples
+ * @param Cmd
+ * @return
+ */
+int CmdUndec(const char *Cmd)
+{
+       if(param_getchar(Cmd, 0) == 'h')
+       {
+               PrintAndLog("Usage: data undec [factor]");
+               PrintAndLog("This function performs un-decimation, by repeating each sample N times");
+               PrintAndLog("Options:        ");
+               PrintAndLog("       h            This help");
+               PrintAndLog("       factor       The number of times to repeat each sample.[default:2]");
+               PrintAndLog("Example: 'data undec 3'");
+               return 0;
+       }
+
+       uint8_t factor = param_get8ex(Cmd, 0,2, 10);
+       //We have memory, don't we?
+       int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
+       uint32_t g_index = 0 ,s_index = 0;
+       while(g_index < GraphTraceLen && s_index < MAX_GRAPH_TRACE_LEN)
+       {
+               int count = 0;
+               for(count = 0; count < factor && s_index+count < MAX_GRAPH_TRACE_LEN; count ++)
+                       swap[s_index+count] = GraphBuffer[g_index];
+               s_index+=count;
+       }
+
+       memcpy(GraphBuffer,swap, s_index * sizeof(int));
+       GraphTraceLen = s_index;
+       RepaintGraphWindow();
+       return 0;
+}

 
 //by marshmellow
 //shift graph zero up or down based on input + or -
 
 //by marshmellow
 //shift graph zero up or down based on input + or -


@@ -1491,25 +1530,79 @@ int CmdHpf(const char *Cmd)
   RepaintGraphWindow();
   return 0;
 }
   RepaintGraphWindow();
   return 0;
 }

+typedef struct {
+       uint8_t * buffer;
+       uint32_t numbits;
+       uint32_t position;
+}BitstreamOut;
+
+bool _headBit( BitstreamOut *stream)
+{
+       int bytepos = stream->position >> 3; // divide by 8
+       int bitpos = (stream->position++) & 7; // mask out 00000111
+       return (*(stream->buffer + bytepos) >> (7-bitpos)) & 1;
+}
+
+uint8_t getByte(uint8_t bits_per_sample, BitstreamOut* b)
+{
+       int i;
+       uint8_t val = 0;
+       for(i =0 ; i < bits_per_sample; i++)
+       {
+               val |= (_headBit(b) << (7-i));
+       }
+       return val;
+}

 
 int CmdSamples(const char *Cmd)
 {
 
 int CmdSamples(const char *Cmd)
 {

-       uint8_t got[BIGBUF_SIZE] = {0x00};
+       //If we get all but the last byte in bigbuf,
+       // we don't have to worry about remaining trash
+       // in the last byte in case the bits-per-sample
+       // does not line up on byte boundaries
+       uint8_t got[BIGBUF_SIZE-1] = { 0 };

 
        int n = strtol(Cmd, NULL, 0);
        if (n == 0)
 
        int n = strtol(Cmd, NULL, 0);
        if (n == 0)

-               n = 20000;
+               n = sizeof(got);

 
        if (n > sizeof(got))
                n = sizeof(got);
 
 
        if (n > sizeof(got))
                n = sizeof(got);
 

-       PrintAndLog("Reading %d samples from device memory\n", n);
+       PrintAndLog("Reading %d bytes from device memory\n", n);

        GetFromBigBuf(got,n,0);
        GetFromBigBuf(got,n,0);

-       WaitForResponse(CMD_ACK,NULL);
-       for (int j = 0; j < n; j++) {
-               GraphBuffer[j] = ((int)got[j]) - 128;
+       PrintAndLog("Data fetched");
+       UsbCommand response;
+       WaitForResponse(CMD_ACK, &response);
+       uint8_t bits_per_sample = 8;
+
+       //Old devices without this feature would send 0 at arg[0]
+       if(response.arg[0] > 0)
+       {
+               sample_config *sc = (sample_config *) response.d.asBytes;
+               PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
+                                       , sc->decimation);
+               bits_per_sample = sc->bits_per_sample;

        }
        }

-       GraphTraceLen = n;
+       if(bits_per_sample < 8)
+       {
+               PrintAndLog("Unpacking...");
+               BitstreamOut bout = { got, bits_per_sample * n,  0};
+               int j =0;
+               for (j = 0; j * bits_per_sample < n * 8 && j < sizeof(GraphBuffer); j++) {
+                       uint8_t sample = getByte(bits_per_sample, &bout);
+                       GraphBuffer[j] = ((int) sample )- 128;
+               }
+               GraphTraceLen = j;
+               PrintAndLog("Unpacked %d samples" , j );
+       }else
+       {
+               for (int j = 0; j < n; j++) {
+                       GraphBuffer[j] = ((int)got[j]) - 128;
+               }
+               GraphTraceLen = n;
+       }
+

        RepaintGraphWindow();
        return 0;
 }
        RepaintGraphWindow();
        return 0;
 }


@@ -2044,7 +2137,8 @@ static command_t CommandTable[] =
   {"threshold",     CmdThreshold,       1, "<threshold> -- Maximize/minimize every value in the graph window depending on threshold"},
        {"dirthreshold",  CmdDirectionalThreshold,   1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
        {"tune",          CmdTuneSamples,     0, "Get hw tune samples for graph window"},
   {"threshold",     CmdThreshold,       1, "<threshold> -- Maximize/minimize every value in the graph window depending on threshold"},
        {"dirthreshold",  CmdDirectionalThreshold,   1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
        {"tune",          CmdTuneSamples,     0, "Get hw tune samples for graph window"},

-  {"zerocrossings", CmdZerocrossings,   1, "Count time between zero-crossings"},
+       {"undec",         CmdUndec,         1, "Un-decimate samples by 2"},
+       {"zerocrossings", CmdZerocrossings,   1, "Count time between zero-crossings"},

   {NULL, NULL, 0, NULL}
 };
 
   {NULL, NULL, 0, NULL}
 };