blocks: moved lfsr and friends to gr-blocks.

author: Tom Rondeau <trondeau@vt.edu> 2013-03-18 12:28:18 -0400
committer: Tom Rondeau <trondeau@vt.edu> 2013-03-18 12:28:18 -0400
commit: 19e39553188395a4ee057fa8c5e0f92cbeda4f28 (patch)
tree: e5e1b8bcaee26ae85a7e998f08504867878f21ed /gr-blocks/include
parent: 65d88f0b28e233c82bc4f0c07072085a3d18c163 (diff)
5 files changed, 273 insertions, 0 deletions
diff --git a/gr-blocks/include/blocks/CMakeLists.txt b/gr-blocks/include/blocks/CMakeLists.txt
index b34809ae59..fcd31e31a8 100644
--- a/gr-blocks/include/blocks/CMakeLists.txt
+++ b/gr-blocks/include/blocks/CMakeLists.txt
@@ -108,6 +108,8 @@ install(FILES
     fxpt.h
     fxpt_nco.h
     fxpt_vco.h
+    lfsr_15_1_0.h
+    lfsr_32k.h
     log2_const.h
     rotator.h
     nco.h
@@ -121,6 +123,7 @@ install(FILES
     burst_tagger.h
     char_to_float.h
     char_to_short.h
+    check_lfsr_32k_s.h
     complex_to_interleaved_short.h
     complex_to_float.h
     complex_to_imag.h
diff --git a/gr-blocks/include/blocks/check_lfsr_32k_s.h b/gr-blocks/include/blocks/check_lfsr_32k_s.h
new file mode 100644
index 0000000000..4eba436e80
--- /dev/null
+++ b/gr-blocks/include/blocks/check_lfsr_32k_s.h
@@ -0,0 +1,56 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GR_CHECK_LFSR_32K_S_H
+#define INCLUDED_GR_CHECK_LFSR_32K_S_H
+
+#include <blocks/api.h>
+#include <gr_sync_block.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief sink that checks if its input stream consists of a lfsr_32k sequence.
+     * \ingroup sink_blk
+     *
+     * This sink is typically used along with
+     * gr::blocks::lfsr_32k_source_s to test the USRP using its
+     * digital loopback mode.
+     */
+    class BLOCKS_API check_lfsr_32k_s : virtual public gr_sync_block
+    {
+    public:
+      // gr::blocks::check_lfsr_32k_s::sptr
+      typedef boost::shared_ptr<check_lfsr_32k_s> sptr;
+
+      static sptr make();
+
+      virtual long ntotal () const = 0;
+      virtual long nright () const = 0;
+      virtual long runlength () const = 0;
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_CHECK_LFSR_32K_S_H */
diff --git a/gr-blocks/include/blocks/lfsr_15_1_0.h b/gr-blocks/include/blocks/lfsr_15_1_0.h
new file mode 100644
index 0000000000..a79ed62eb8
--- /dev/null
+++ b/gr-blocks/include/blocks/lfsr_15_1_0.h
@@ -0,0 +1,69 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GRI_LFSR_15_1_0_H
+#define INCLUDED_GRI_LFSR_15_1_0_H
+
+#include <blocks/api.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief Linear Feedback Shift Register using primitive polynomial x^15 + x + 1
+     * \ingroup misc
+     *
+     * Generates a maximal length pseudo-random sequence of length
+     * 2^15 - 1 bits.
+     */
+    class BLOCKS_API lfsr_15_1_0
+    {
+    private:
+      unsigned long d_sr;    // shift register
+
+    public:
+      lfsr_15_1_0() { reset(); }
+
+      void reset() { d_sr = 0x7fff; }
+
+      int next_bit()
+      {
+        d_sr = ((((d_sr >> 1) ^ d_sr) & 0x1) << 14) | (d_sr >> 1);
+        return d_sr & 0x1;
+      }
+
+      int next_byte ()
+      {
+        int	v = 0;
+        for(int i = 0; i < 8; i++) {
+          v >>= 1;
+          if(next_bit ())
+            v |= 0x80;
+        }
+        return v;
+      }
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GRI_LFSR_15_1_0_H */
diff --git a/gr-blocks/include/blocks/lfsr_32k.h b/gr-blocks/include/blocks/lfsr_32k.h
new file mode 100644
index 0000000000..7e70f6512b
--- /dev/null
+++ b/gr-blocks/include/blocks/lfsr_32k.h
@@ -0,0 +1,90 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GRI_LFSR_32k_H
+#define INCLUDED_GRI_LFSR_32k_H
+
+#include <blocks/api.h>
+#include <blocks/lfsr_15_1_0.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief generate pseudo-random sequence of length 32768 bits.
+     * \ingroup misc
+     *
+     * This is based on gri_lfsr_15_1_0 with an extra 0 added at the
+     * end of the sequence.
+     */
+    class BLOCKS_API lfsr_32k
+    {
+    private:
+      lfsr_15_1_0 d_lfsr;
+      unsigned int d_count;
+
+    public:
+      lfsr_32k() { reset (); }
+
+      void reset()
+      {
+        d_lfsr.reset();
+        d_count = 0;
+      }
+
+      int next_bit()
+      {
+        if(d_count == 32767) {
+          d_count = 0;
+          return 0;
+        }
+        d_count++;
+        return d_lfsr.next_bit();
+      }
+
+      int next_byte()
+      {
+        int	v = 0;
+        for(int i = 0; i < 8; i++) {
+          v >>= 1;
+          if(next_bit ())
+            v |= 0x80;
+        }
+        return v;
+      }
+
+      int next_short()
+      {
+        int v = 0;
+        for(int i = 0; i < 16; i++) {
+          v >>= 1;
+          if(next_bit ())
+            v |= 0x8000;
+        }
+        return v;
+      }
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GRI_LFSR_32k_H */
diff --git a/gr-blocks/include/blocks/lfsr_32k_source_s.h b/gr-blocks/include/blocks/lfsr_32k_source_s.h
new file mode 100644
index 0000000000..c24cc31b29
--- /dev/null
+++ b/gr-blocks/include/blocks/lfsr_32k_source_s.h
@@ -0,0 +1,55 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GR_LFSR_32K_SOURCE_S_H
+#define INCLUDED_GR_LFSR_32K_SOURCE_S_H
+
+#include <blocks/api.h>
+#include <blocks/lfsr_32k.h>
+#include <gr_sync_block.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief LFSR pseudo-random source with period of 2^15 bits (2^11 shorts)
+     * \ingroup source_blk
+     *
+     * This source is typically used along with gr::blocks::check_lfsr_32k_s to
+     * test the USRP using its digital loopback mode.
+     */
+    class BLOCKS_API lfsr_32k_source_s : virtual public gr_sync_block
+    {
+    public:
+      // gr::blocks::lfsr_32k_source_s::sptr
+      typedef boost::shared_ptr<lfsr_32k_source_s> sptr;
+
+      /*!
+       * \brief Make a LFSR 32k source block.
+       */
+      static sptr make();
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_GR_LFSR_32K_SOURCE_S_H */
author	Tom Rondeau <trondeau@vt.edu>	2013-03-18 12:28:18 -0400
committer	Tom Rondeau <trondeau@vt.edu>	2013-03-18 12:28:18 -0400
commit	19e39553188395a4ee057fa8c5e0f92cbeda4f28 (patch)
tree	e5e1b8bcaee26ae85a7e998f08504867878f21ed /gr-blocks/include
parent	65d88f0b28e233c82bc4f0c07072085a3d18c163 (diff)