#ifndef ucoolib_base_proto_proto_hh #define ucoolib_base_proto_proto_hh // ucoolib - Microcontroller object oriented library. {{{ // // Copyright (C) 2013 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. // // }}} #include "ucoolib/common.hh" #include "ucoolib/intf/stream.hh" #include "config/base/proto.hh" namespace ucoo { /// Support for old proto protocol. class Proto { public: /// Receivers should implement this interface. class Handler { public: /// Handle a received message. virtual void proto_handle (Proto &proto, char cmd, const uint8_t *args, int size) = 0; }; public: /// Constructor. Proto (Handler &handler, Stream &stream); /// Read from stream and handle any received message. void accept (); /// Send a message with no argument. void send (char cmd); /// Send a message with one argument. void send (char cmd, const char *fmt, int a0); /// Send a message with two arguments. void send (char cmd, const char *fmt, int a0, int a1); /// Send a message with three arguments. void send (char cmd, const char *fmt, int a0, int a1, int a2); /// Send a message with four arguments. void send (char cmd, const char *fmt, int a0, int a1, int a2, int a3); /// Send a message, with a byte buffer. void send_buf (char cmd, const uint8_t *args, int size); private: /// Accept a digit to be used for args. void accept_digit (int c); /// Accept a quoted char to be used for args. void accept_char (int c); private: /// Handler interface. Handler &handler_; /// Connected stream. Stream &stream_; /// Decoding step. enum Step { /// Nothing received yet. IDLE, /// Exclamation mark received. BANG, /// Expecting argument or end of frame. COMMAND, /// Expecting second hex digit of an argument. ARG_DIGIT, /// Quote received, expect any char. ARG_CHAR, /// Double quote received, read a string. ARG_STRING, }; Step step_; /// Received message current size. int size_; /// Message arguments being received. uint8_t args_[UCOO_CONFIG_BASE_PROTO_ARGS_MAX_SIZE]; /// Command being received. char cmd_; }; } // namespace ucoo #endif // ucoolib_base_proto_proto_hh