1 files changed, 91 insertions, 0 deletions
diff --git a/usrp/host/apps-inband/gmac.h b/usrp/host/apps-inband/gmac.h
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+++ b/usrp/host/apps-inband/gmac.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2007 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 this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef INCLUDED_GMAC_H
+#define INCLUDED_GMAC_H
+
+#include <mb_mblock.h>
+
+class gmac;
+
+class gmac : public mb_mblock
+{
+
+  // The state is used to determine how to handle incoming messages and of
+  // course, the state of the MAC protocol.
+  enum state_t {
+    INIT,
+    OPENING_USRP,
+    ALLOCATING_CHANNELS,
+    INIT_GMAC,
+    IDLE,
+    CLOSING_CHANNELS,
+    CLOSING_USRP,
+  };
+  state_t	d_state;
+
+  // Ports used for applications to connect to this block
+  mb_port_sptr		  d_tx, d_rx, d_cs;
+
+  // Ports to connect to usrp_server (us)
+  mb_port_sptr      d_us_tx, d_us_rx, d_us_cs;
+
+  // The channel numbers assigned for use
+  pmt_t d_us_rx_chan, d_us_tx_chan;
+
+  pmt_t d_which_usrp;
+
+  bool d_carrier_sense;
+  long d_cs_thresh;
+  long d_cs_deadline;
+
+  enum FPGA_REGISTERS {
+    REG_CS_THRESH = 1,
+    REG_CS_DEADLINE = 2
+  };
+  
+ public:
+  gmac(mb_runtime *rt, const std::string &instance_name, pmt_t user_arg);
+  ~gmac();
+  void handle_message(mb_message_sptr msg);
+
+ private:
+  void define_ports();
+  void initialize_usrp();
+  void initialize_gmac();
+  void set_carrier_sense(bool toggle, long threshold, long deadline, pmt_t invocation);
+  void allocate_channels();
+  void enter_receiving();
+  void enter_idle();
+  void close_channels();
+  void open_usrp();
+  void close_usrp();
+  void handle_cmd_tx_pkt(pmt_t data);
+  void handle_response_xmit_raw_frame(pmt_t data);
+  bool carrier_sense_pkt(pmt_t pkt_properties);
+  void handle_cmd_carrier_sense_enable(pmt_t data);
+  void handle_cmd_carrier_sense_threshold(pmt_t data);
+  void handle_cmd_carrier_sense_disable(pmt_t data);
+  void handle_cmd_carrier_sense_deadline(pmt_t data);
+ 
+};
+
+#endif // INCLUDED_GMAC_H