Added client-side support for recording longer samples, fixed last (?) issues on...

[proxmark3-svn] / client / cmddata.c

diff --git a/client/cmddata.c b/client/cmddata.c
index a88fa4e1074f46b89f40336fcb08ffd0374ff75f..7938458073127617f8fd2474ea992c5f20d1dcc8 100644 (file)
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -1051,6 +1051,29 @@ int CmdHpf(const char *Cmd)
   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)
 {
@@ -1063,15 +1086,35 @@ int CmdSamples(const char *Cmd)
        if (n > sizeof(got))
                n = sizeof(got);
 
-       PrintAndLog("Reading %d samples from device memory\n", n);
-  GetFromBigBuf(got,n,0);
-  WaitForResponse(CMD_ACK,NULL);
-       for (int j = 0; j < n; j++) {
-               GraphBuffer[j] = ((int)got[j]) - 128;
-  }
-  GraphTraceLen = n;
-  RepaintGraphWindow();
-  return 0;
+       PrintAndLog("Reading %d bytes from device memory\n", n);
+       GetFromBigBuf(got,n,0);
+       PrintAndLog("Data fetched");
+       UsbCommand response;
+       WaitForResponse(CMD_ACK, &response);
+       uint8_t bits_per_sample = response.arg[0];
+       PrintAndLog("Samples packed at %d bits per sample", bits_per_sample);
+       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 < GraphTraceLen; 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;
 }
 
 int CmdTuneSamples(const char *Cmd)