merge from gr36_ni branch

1 files changed, 65 insertions, 0 deletions

diff --git a/gnuradio-core/src/lib/io/i2c_bitbang.h b/gnuradio-core/src/lib/io/i2c_bitbang.h
new file mode 100644
index 000000000..1d6fe5044
--- /dev/null
+++ b/gnuradio-core/src/lib/io/i2c_bitbang.h
@@ -0,0 +1,65 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2001,2004 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_I2C_BITBANG_H
+#define INCLUDED_I2C_BITBANG_H
+
+#include <gr_core_api.h>
+#include <i2c.h>
+#include <i2c_bbio.h>
+
+/*!
+ * \brief class for controlling i2c bus
+ * \ingroup base
+ */
+class GR_CORE_API i2c_bitbang : public i2c {
+  friend GR_CORE_API i2c_sptr make_i2c_bitbang (i2c_bbio_sptr io);
+  i2c_bitbang (i2c_bbio_sptr io);
+
+ public:
+  ~i2c_bitbang () {}
+
+  //! \returns true iff successful
+  bool write (int addr, const unsigned char *buf, int nbytes);
+
+  //! \returns number of bytes read or -1 if error
+  int read (int addr, unsigned char *buf, int max_bytes);
+
+
+private:
+  void start ();
+  void stop ();
+  void write_bit (bool bit);
+  bool write_byte (char byte);
+
+  void set_sda (bool bit) { d_io->set_sda (bit); }
+  void set_scl (bool bit) { d_io->set_scl (bit); }
+  bool get_sda () { return d_io->get_sda (); }
+
+  i2c_bbio_sptr		d_io;
+};
+
+GR_CORE_API i2c_sptr make_i2c_bitbang (i2c_bbio_sptr io);
+
+#endif /* INCLUDED_I2C_BITBANG_H */
+
+