1 files changed, 106 insertions, 0 deletions
diff --git a/gr-usrp/src/usrp_sink_c.cc b/gr-usrp/src/usrp_sink_c.cc
new file mode 100644
index 000000000..363a113fc
--- /dev/null
+++ b/gr-usrp/src/usrp_sink_c.cc
@@ -0,0 +1,106 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2006 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <usrp_sink_c.h>
+#include <gr_io_signature.h>
+#include <usrp_standard.h>
+#include <usrp_bytesex.h>
+
+usrp_sink_c_sptr
+usrp_make_sink_c (int which_board,
+		   unsigned int interp_rate,
+		   int nchan,
+		   int mux,
+		   int fusb_block_size,
+		   int fusb_nblocks,
+		   const std::string fpga_filename,
+		   const std::string firmware_filename
+		   ) throw (std::runtime_error)
+{
+  return usrp_sink_c_sptr (new usrp_sink_c (which_board,
+					      interp_rate,
+					      nchan,
+					      mux,
+					      fusb_block_size,
+					      fusb_nblocks,
+					      fpga_filename,
+					      firmware_filename
+					      ));
+}
+
+
+usrp_sink_c::usrp_sink_c (int which_board,
+			    unsigned int interp_rate,
+			    int nchan,
+			    int mux,
+			    int fusb_block_size,
+			    int fusb_nblocks,
+			    const std::string fpga_filename,
+			    const std::string firmware_filename
+			    ) throw (std::runtime_error)
+  : usrp_sink_base ("usrp_sink_c",
+		     gr_make_io_signature (1, 1, sizeof (gr_complex)),
+		     which_board, interp_rate, nchan, mux,
+		     fusb_block_size, fusb_nblocks,
+		     fpga_filename, firmware_filename)
+{
+}
+
+usrp_sink_c::~usrp_sink_c ()
+{
+  // NOP
+}
+
+/*
+ * Take one complex input stream and format it into interleaved short I & Q
+ * for the usrp.
+ */
+void
+usrp_sink_c::copy_to_usrp_buffer (gr_vector_const_void_star &input_items,
+				   int  input_index,
+				   int	input_items_available,
+				   int  &input_items_consumed,	// out
+				   void *usrp_buffer,
+				   int  usrp_buffer_length,
+				   int	&bytes_written)		// out
+{
+  gr_complex *in = &((gr_complex *) input_items[0])[input_index];
+  short *dst = (short *) usrp_buffer;
+
+  static const int usrp_bytes_per_input_item = 2 * sizeof (short); // I & Q
+
+  int nitems = std::min (input_items_available,
+			 usrp_buffer_length / usrp_bytes_per_input_item);
+
+  for (int i = 0; i < nitems; i++){
+    dst[2*i + 0] = host_to_usrp_short((short) real(in[i]));	// FIXME saturate?
+    dst[2*i + 1] = host_to_usrp_short((short) imag(in[i])); 	// FIXME saturate?
+  }
+
+  input_items_consumed = nitems;
+  bytes_written = nitems * usrp_bytes_per_input_item;
+}
+