EMW3162.h

00001 /* ESP8266Interface Example
00002  * Copyright (c) 2015 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #ifndef ESP8266_H
00018 #define ESP8266_H
00019 
00020 #include "ATParser.h"
00021 
00022 /** ESP8266Interface class.
00023     This is an interface to a ESP8266 radio.
00024  */
00025 class ESP8266
00026 {
00027 public:
00028     ESP8266(PinName tx, PinName rx, bool debug=false);
00029 
00030     /**
00031     * Startup the ESP8266
00032     *
00033     * @param mode mode of WIFI 1-client, 2-host, 3-both
00034     * @return true only if ESP8266 was setup correctly
00035     */
00036     bool startup();
00037 
00038     /**
00039     * Reset ESP8266
00040     *
00041     * @return true only if ESP8266 resets successfully
00042     */
00043     bool reset(const char *reset);
00044 
00045     /**
00046     * Enable/Disable DHCP
00047     *
00048     * @param enabled DHCP enabled when true
00049     * @param mode mode of DHCP 0-softAP, 1-station, 2-both
00050     * @return true only if ESP8266 enables/disables DHCP successfully
00051     */
00052     bool dhcp(bool enabled);
00053 
00054     /**
00055     * Connect ESP8266 to AP
00056     *
00057     * @param ap the name of the AP
00058     * @param passPhrase the password of AP
00059     * @return true only if ESP8266 is connected successfully
00060     */
00061     bool connect(const char *ap, const char *passPhrase);
00062 
00063     /**
00064     * Disconnect ESP8266 from AP
00065     *
00066     * @return true only if ESP8266 is disconnected successfully
00067     */
00068     bool disconnect(void);
00069 
00070     /**
00071     * Get the IP address of ESP8266
00072     *
00073     * @return null-teriminated IP address or null if no IP address is assigned
00074     */
00075     const char *getIPAddress(void);
00076 
00077     /**
00078     * Get the MAC address of ESP8266
00079     *
00080     * @return null-terminated MAC address or null if no MAC address is assigned
00081     */
00082     const char *getMACAddress(void);
00083 
00084     /**
00085     * Check if ESP8266 is conenected
00086     *
00087     * @return true only if the chip has an IP address
00088     */
00089     bool isConnected(void);
00090 
00091     /**
00092     * Open a socketed connection
00093     *
00094     * @param type the type of socket to open "UDP" or "TCP"
00095     * @param id id to give the new socket, valid 0-4
00096     * @param port port to open connection with
00097     * @param addr the IP address of the destination
00098     * @return true only if socket opened successfully
00099     */
00100     int open(const char *type, int id, const char* addr, int port);
00101 
00102     /**
00103     * Sends data to an open socket
00104     *
00105     * @param id id of socket to send to
00106     * @param data data to be sent
00107     * @param amount amount of data to be sent - max 1024
00108     * @return true only if data sent successfully
00109     */
00110     bool send(int id, const void *data, uint32_t amount);
00111 
00112     /**
00113     * Receives data from an open socket
00114     *
00115     * @param id id to receive from
00116     * @param data placeholder for returned information
00117     * @param amount number of bytes to be received
00118     * @return the number of bytes received
00119     */
00120     int32_t recv(int id, void *data, uint32_t amount);
00121 
00122     /**
00123     * Closes a socket
00124     *
00125     * @param id id of socket to close, valid only 0-4
00126     * @return true only if socket is closed successfully
00127     */
00128     bool close(int id);
00129 
00130     /**
00131     * Allows timeout to be changed between commands
00132     *
00133     * @param timeout_ms timeout of the connection
00134     */
00135     void setTimeout(uint32_t timeout_ms);
00136 
00137     /**
00138     * Checks if data is available
00139     */
00140     bool readable();
00141 
00142     /**
00143     * Checks if data can be written
00144     */
00145     bool writeable();
00146 
00147     /**
00148     * Attach a function to call whenever network state has changed
00149     *
00150     * @param func A pointer to a void function, or 0 to set as none
00151     */
00152     void attach(Callback<void()> func);
00153 
00154     /**
00155     * Attach a function to call whenever network state has changed
00156     *
00157     * @param obj pointer to the object to call the member function on
00158     * @param method pointer to the member function to call
00159     */
00160     template <typename T, typename M>
00161     void attach(T *obj, M method) {
00162         attach(Callback<void()>(obj, method));
00163     }
00164 
00165 private:
00166     BufferedSerial _serial;
00167     ATParser _parser;
00168 
00169     struct packet {
00170         struct packet *next;
00171         int id;
00172         uint32_t len;
00173         // data follows
00174     } *_packets, **_packets_end;
00175     void _packet_handler();
00176 
00177     char _ip_buffer[16];
00178     char _mac_buffer[18];
00179 };
00180 
00181 #endif