#ifndef ucoo_base_proto_proto_hh #define ucoo_base_proto_proto_hh // ucoolib - Microcontroller object oriented library. {{{ // // Copyright (C) 2013 Nicolas Schodet // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. // // }}} #include "ucoo/common.hh" #include "ucoo/intf/stream.hh" #include "config/ucoo/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_[CONFIG_UCOO_BASE_PROTO_ARGS_MAX_SIZE]; /// Command being received. char cmd_; }; } // namespace ucoo #endif // ucoo_base_proto_proto_hh