1 files changed, 113 insertions, 0 deletions
diff --git a/host/lib/usrp/e300/e300_async_serial.hpp b/host/lib/usrp/e300/e300_async_serial.hpp
new file mode 100644
index 000000000..fafc7de3d
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+++ b/host/lib/usrp/e300/e300_async_serial.hpp
@@ -0,0 +1,113 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program 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 of the License, or
+// (at your option) any later version.
+//
+// This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_ASYNC_SERIAL_HPP
+#define INCLUDED_ASYNC_SERIAL_HPP
+
+#include <boost/asio.hpp>
+#include <boost/bind.hpp>
+#include <boost/thread.hpp>
+#include <boost/utility.hpp>
+#include <boost/function.hpp>
+#include <boost/shared_array.hpp>
+
+namespace uhd { namespace usrp { namespace gps {
+
+class async_serial : private boost::noncopyable
+{
+public:
+    async_serial();
+    ~async_serial();
+
+    async_serial(const std::string &node, const size_t baud_rate,
+        boost::asio::serial_port_base::parity opt_parity=
+            boost::asio::serial_port_base::parity(
+                boost::asio::serial_port_base::parity::none),
+        boost::asio::serial_port_base::character_size opt_csize=
+            boost::asio::serial_port_base::character_size(8),
+        boost::asio::serial_port_base::flow_control opt_flow=
+            boost::asio::serial_port_base::flow_control(
+                boost::asio::serial_port_base::flow_control::none),
+        boost::asio::serial_port_base::stop_bits opt_stop=
+            boost::asio::serial_port_base::stop_bits(
+                boost::asio::serial_port_base::stop_bits::one));
+
+   void open(const std::string& node, const size_t baud_rate,
+        boost::asio::serial_port_base::parity opt_parity=
+            boost::asio::serial_port_base::parity(
+                boost::asio::serial_port_base::parity::none),
+        boost::asio::serial_port_base::character_size opt_csize=
+            boost::asio::serial_port_base::character_size(8),
+        boost::asio::serial_port_base::flow_control opt_flow=
+            boost::asio::serial_port_base::flow_control(
+                boost::asio::serial_port_base::flow_control::none),
+        boost::asio::serial_port_base::stop_bits opt_stop=
+            boost::asio::serial_port_base::stop_bits(
+                boost::asio::serial_port_base::stop_bits::one));
+
+   bool is_open(void) const;
+
+   bool error_status(void) const;
+
+   void close(void);
+
+   void write(const char *data, const size_t size);
+   void write(const std::vector<char> &data);
+
+   void write_string(const std::string &s);
+
+   static const size_t READ_BUFFER_SIZE=512;
+
+   void set_read_callback(
+       const boost::function<void (const char*, size_t)>& callback);
+
+   void clear_callback();
+
+private: // methods
+   void _do_read();
+
+   void _read_end(
+       const boost::system::error_code &error,
+       size_t bytes_transferred);
+
+   void _do_write();
+
+   void _write_end(const boost::system::error_code &error);
+
+   void _do_close();
+
+   void _set_error_status(const bool e);
+private: // members
+    boost::asio::io_service         _io;
+    boost::asio::serial_port        _port;
+    boost::thread                   _background_thread;
+    bool                            _open;
+    bool                            _error;
+    mutable boost::mutex            _error_mutex;
+
+    std::vector<char>              _write_queue;
+    boost::shared_array<char>      _write_buffer;
+    size_t                         _write_buffer_size;
+    boost::mutex                   _write_queue_mutex;
+    char                           _read_buffer[READ_BUFFER_SIZE];
+
+    boost::function<void (const char*, size_t)> _callback;
+};
+
+}}} // namespace
+
+#endif //INCLUDED_ASYNC_SERIAL_HPP