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+#ifndef ucoolib_arch_host_mex_mex_hh
+#define ucoolib_arch_host_mex_mex_hh
+// ucoolib - Microcontroller object oriented library. {{{
+//
+// Copyright (C) 2012 Nicolas Schodet
+//
+// APBTeam:
+// Web: http://apbteam.org/
+// Email: team AT apbteam DOT org
+//
+// 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 2 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, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+//
+// }}}
+
+namespace ucoo {
+namespace mex {
+
+/// Message type identifiers.
+enum mtype_t
+{
+ /// IDLE message, sent by nodes to the hub to signal it had handled all
+ /// messages. It can have an optional parameter: the date at which the
+ /// node will not be idle anymore.
+ MTYPE_IDLE = 0,
+ /// DATE message, sent by the hub to the nodes to update the current date
+ /// value, sent by a node to request the current date (useful at startup).
+ MTYPE_DATE = 1,
+ /// REQ (request) message, sent from a node to other nodes to request a
+ /// response message.
+ MTYPE_REQ = 2,
+ /// RSP (response) message, response to a REQ message, only sent to the
+ /// requesting node.
+ MTYPE_RSP = 3,
+ /// RES (reserve) message, sent to the hub to request a message type, sent
+ /// to a node with the allocated message type.
+ MTYPE_RES = 4,
+ /// First unreserved message identifier, to be used by user messages.
+ MTYPE_USER_MIN = 0x20,
+};
+
+} // namespace mex
+} // namespace ucoo
+
+#endif // ucoolib_arch_host_mex_mex_hh