Diff: components/wifi/esp8266-driver/ESP8266/ESP8266.h

Revision:

0:5b88d5760320

Child:

1:9db0e321a9f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/wifi/esp8266-driver/ESP8266/ESP8266.h	Tue Dec 17 23:23:45 2019 +0000
@@ -0,0 +1,506 @@
+/* ESP8266Interface Example
+ * Copyright (c) 2015 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ESP8266_H
+#define ESP8266_H
+
+#if DEVICE_SERIAL && DEVICE_INTERRUPTIN && defined(MBED_CONF_EVENTS_PRESENT) && defined(MBED_CONF_NSAPI_PRESENT) && defined(MBED_CONF_RTOS_PRESENT)
+#include <stdint.h>
+
+#include "drivers/UARTSerial.h"
+#include "features/netsocket/nsapi_types.h"
+#include "features/netsocket/WiFiAccessPoint.h"
+#include "PinNames.h"
+#include "platform/ATCmdParser.h"
+#include "platform/Callback.h"
+#include "platform/mbed_error.h"
+#include "rtos/ConditionVariable.h"
+#include "rtos/Mutex.h"
+
+// Various timeouts for different ESP8266 operations
+#ifndef ESP8266_CONNECT_TIMEOUT
+#define ESP8266_CONNECT_TIMEOUT 15000
+#endif
+#ifndef ESP8266_SEND_TIMEOUT
+#define ESP8266_SEND_TIMEOUT    2000
+#endif
+#ifndef ESP8266_RECV_TIMEOUT
+#define ESP8266_RECV_TIMEOUT    2000
+#endif
+#ifndef ESP8266_MISC_TIMEOUT
+#define ESP8266_MISC_TIMEOUT    2000
+#endif
+
+#define ESP8266_SCAN_TIME_MIN 0     // [ms]
+#define ESP8266_SCAN_TIME_MAX 1500  // [ms]
+#define ESP8266_SCAN_TIME_MIN_DEFAULT 120 // [ms]
+#define ESP8266_SCAN_TIME_MAX_DEFAULT 360 // [ms]
+
+// Firmware version
+#define ESP8266_SDK_VERSION 2000000
+#define ESP8266_SDK_VERSION_MAJOR ESP8266_SDK_VERSION/1000000
+
+#define ESP8266_AT_VERSION 1000000
+#define ESP8266_AT_VERSION_MAJOR ESP8266_AT_VERSION/1000000
+#define ESP8266_AT_VERSION_TCP_PASSIVE_MODE 1070000
+#define ESP8266_AT_VERSION_WIFI_SCAN_CHANGE 1060000
+
+#define FW_AT_LEAST_VERSION(MAJOR,MINOR,PATCH,NUSED/*Not used*/,REF) \
+    (((MAJOR)*1000000+(MINOR)*10000+(PATCH)*100) >= REF ? true : false)
+
+/** ESP8266Interface class.
+    This is an interface to a ESP8266 radio.
+ */
+class ESP8266 {
+public:
+    ESP8266(PinName tx, PinName rx, bool debug = false, PinName rts = NC, PinName cts = NC);
+
+    /**
+    * ESP8266 firmware SDK version
+    *
+    * @param major Major version number
+    * @param minor Minor version number
+    * @param patch Patch version number
+    */
+    struct fw_sdk_version {
+        int major;
+        int minor;
+        int patch;
+        fw_sdk_version(int major, int minor, int patch) : major(major), minor(minor), patch(patch) {}
+    };
+
+    /**
+    * ESP8266 firmware AT version
+    *
+    * @param major Major version number
+    * @param minor Minor version number
+    * @param patch Patch version number
+    */
+    struct fw_at_version {
+        int major;
+        int minor;
+        int patch;
+        fw_at_version(int major, int minor, int patch) : major(major), minor(minor), patch(patch) {}
+    };
+
+    /**
+    * Check AT command interface of ESP8266
+    *
+    * @return true if ready to respond on AT commands
+    */
+    bool at_available(void);
+
+    /**
+     * Disable echo - required for OOB processing to work
+     *
+     * @return true if echo was successfully disabled
+     */
+    bool echo_off(void);
+
+    /**
+    * Check sdk version from which firmware is created
+    *
+    * @return fw_sdk_version which tells major, minor and patch version
+    */
+    struct fw_sdk_version sdk_version(void);
+
+    /**
+    * Check AT instruction set version from which firmware is created
+    *
+    * @return fw_at_version which tells major, minor and patch version
+    */
+    struct fw_at_version at_version(void);
+
+    /**
+    * Startup the ESP8266
+    *
+    * @param mode mode of WIFI 1-client, 2-host, 3-both
+    * @return true only if ESP8266 was setup correctly
+    */
+    bool startup(int mode);
+
+    /**
+    * Reset ESP8266
+    *
+    * @return true only if ESP8266 resets successfully
+    */
+    bool reset(void);
+
+    /**
+    * Enable/Disable DHCP
+    *
+    * @param enabled DHCP enabled when true
+    * @param mode mode of DHCP 0-softAP, 1-station, 2-both
+    * @return true only if ESP8266 enables/disables DHCP successfully
+    */
+    bool dhcp(bool enabled, int mode);
+
+    /**
+    * Connect ESP8266 to AP
+    *
+    * @param ap the name of the AP
+    * @param passPhrase the password of AP
+    * @return NSAPI_ERROR_OK in success, negative error code in failure
+    */
+    nsapi_error_t connect(const char *ap, const char *passPhrase);
+
+    /**
+    * Disconnect ESP8266 from AP
+    *
+    * @return true only if ESP8266 is disconnected successfully
+    */
+    bool disconnect(void);
+
+    /**
+    * Get the IP address of ESP8266
+    *
+    * @return null-teriminated IP address or null if no IP address is assigned
+    */
+    const char *ip_addr(void);
+
+    /**
+    * Get the MAC address of ESP8266
+    *
+    * @return null-terminated MAC address or null if no MAC address is assigned
+    */
+    const char *mac_addr(void);
+
+    /** Get the local gateway
+    *
+    *  @return         Null-terminated representation of the local gateway
+    *                  or null if no network mask has been recieved
+    */
+    const char *gateway();
+
+    /** Get the local network mask
+     *
+     *  @return         Null-terminated representation of the local network mask
+     *                  or null if no network mask has been recieved
+     */
+    const char *netmask();
+
+    /* Return RSSI for active connection
+     *
+     * @return      Measured RSSI
+     */
+    int8_t rssi();
+
+    /** Scan mode
+     */
+    enum scan_mode {
+        SCANMODE_ACTIVE = 0, /*!< active mode */
+        SCANMODE_PASSIVE = 1 /*!< passive mode */
+    };
+
+    /** Scan for available networks
+     *
+     * @param  ap    Pointer to allocated array to store discovered AP
+     * @param  limit Size of allocated @a res array, or 0 to only count available AP
+     * @param  t_max Maximum scan time per channel
+     * @param  t_min Minimum scan time per channel in active mode, can be omitted in passive mode
+     * @return       Number of entries in @a res, or if @a count was 0 number of available networks, negative on error
+     *               see @a nsapi_error
+     */
+    int scan(WiFiAccessPoint *res, unsigned limit, scan_mode mode, unsigned t_max, unsigned t_min);
+
+    /**Perform a dns query
+    *
+    * @param name Hostname to resolve
+    * @param ip   Buffer to store IP address
+    * @return 0 true on success, false on failure
+    */
+    bool dns_lookup(const char *name, char *ip);
+
+    /**
+    * Open a socketed connection
+    *
+    * @param type the type of socket to open "UDP" or "TCP"
+    * @param id id to give the new socket, valid 0-4
+    * @param port port to open connection with
+    * @param addr the IP address of the destination
+    * @param port the port on the destination
+    * @param local_port UDP socket's local port, zero means any
+    * @return NSAPI_ERROR_OK in success, negative error code in failure
+    */
+    nsapi_error_t open_udp(int id, const char *addr, int port, int local_port = 0);
+
+    /**
+    * Open a socketed connection
+    *
+    * @param type the type of socket to open "UDP" or "TCP"
+    * @param id id to give the new socket, valid 0-4
+    * @param port port to open connection with
+    * @param addr the IP address of the destination
+    * @param port the port on the destination
+    * @param tcp_keepalive TCP connection's keep alive time, zero means disabled
+    * @return NSAPI_ERROR_OK in success, negative error code in failure
+    */
+    nsapi_error_t open_tcp(int id, const char *addr, int port, int keepalive = 0);
+
+    /**
+    * Sends data to an open socket
+    *
+    * @param id id of socket to send to
+    * @param data data to be sent
+    * @param amount amount of data to be sent - max 1024
+    * @return NSAPI_ERROR_OK in success, negative error code in failure
+    */
+    nsapi_error_t send(int id, const void *data, uint32_t amount);
+
+    /**
+    * Receives datagram from an open UDP socket
+    *
+    * @param id id to receive from
+    * @param data placeholder for returned information
+    * @param amount number of bytes to be received
+    * @return the number of bytes received
+    */
+    int32_t recv_udp(int id, void *data, uint32_t amount, uint32_t timeout = ESP8266_RECV_TIMEOUT);
+
+    /**
+    * Receives stream data from an open TCP socket
+    *
+    * @param id id to receive from
+    * @param data placeholder for returned information
+    * @param amount number of bytes to be received
+    * @return the number of bytes received
+    */
+    int32_t recv_tcp(int id, void *data, uint32_t amount, uint32_t timeout = ESP8266_RECV_TIMEOUT);
+
+    /**
+    * Closes a socket
+    *
+    * @param id id of socket to close, valid only 0-4
+    * @return true only if socket is closed successfully
+    */
+    bool close(int id);
+
+    /**
+    * Allows timeout to be changed between commands
+    *
+    * @param timeout_ms timeout of the connection
+    */
+    void set_timeout(uint32_t timeout_ms = ESP8266_MISC_TIMEOUT);
+
+    /**
+    * Checks if data is available
+    */
+    bool readable();
+
+    /**
+    * Checks if data can be written
+    */
+    bool writeable();
+
+    /**
+    * Attach a function to call whenever sigio happens in the serial
+    *
+    * @param func A pointer to a void function, or 0 to set as none
+    */
+    void sigio(mbed::Callback<void()> func);
+
+    /**
+    * Attach a function to call whenever sigio happens in the serial
+    *
+    * @param obj pointer to the object to call the member function on
+    * @param method pointer to the member function to call
+    */
+    template <typename T, typename M>
+    void sigio(T *obj, M method)
+    {
+        sigio(mbed::Callback<void()>(obj, method));
+    }
+
+    /**
+    * Attach a function to call whenever network state has changed.
+    *
+    * @param func A pointer to a void function, or 0 to set as none
+    */
+    void attach(mbed::Callback<void()> status_cb);
+
+    template <typename T, typename M>
+    void attach(T *obj, M method)
+    {
+        attach(mbed::Callback<void()>(obj, method));
+    }
+
+    /**
+     * Read default Wifi mode from flash
+     *
+     * return Station, SoftAP or SoftAP+Station - 0 on failure
+     */
+    int8_t default_wifi_mode();
+
+    /**
+     * Default Wifi mode written to flash only if changes
+     */
+    bool set_default_wifi_mode(const int8_t mode);
+
+    /**
+     * @param track_ap      if TRUE, sets the county code to be the same as the AP's that ESP is connected to,
+     *                      if FALSE the code will not change
+     * @param country_code  ISO 3166-1 Alpha-2 coded country code
+     * @param channel_start the channel number to start at
+     * @param channels      number of channels
+     */
+    bool set_country_code_policy(bool track_ap, const char *country_code, int channel_start, int channels);
+
+    /** Get the connection status
+     *
+     *  @return         The connection status according to ConnectionStatusType
+     */
+    nsapi_connection_status_t connection_status() const;
+
+    /**
+     * Start board's and ESP8266's UART flow control
+     *
+     * @return true if started
+     */
+    bool start_uart_hw_flow_ctrl();
+
+    /**
+     * Stop board's and ESP8266's UART flow control
+     *
+     * @return true if started
+     */
+    bool stop_uart_hw_flow_ctrl();
+
+    /*
+     * From AT firmware v1.7.0.0 onwards enables TCP passive mode
+     */
+    bool cond_enable_tcp_passive_mode();
+
+    /**
+     * For executing OOB processing on background
+     *
+     * @param timeout AT parser receive timeout
+     * @param if TRUE, process all OOBs instead of only one
+     */
+    void bg_process_oob(uint32_t timeout, bool all);
+
+    /**
+     * Flush the serial port input buffers.
+     *
+     * If you do HW reset for ESP module, you should
+     * flush the input buffers from existing responses
+     * from the device.
+     */
+    void flush();
+
+    static const int8_t WIFIMODE_STATION = 1;
+    static const int8_t WIFIMODE_SOFTAP = 2;
+    static const int8_t WIFIMODE_STATION_SOFTAP = 3;
+    static const int8_t SOCKET_COUNT = 5;
+
+private:
+    // FW version
+    struct fw_sdk_version _sdk_v;
+    struct fw_at_version _at_v;
+
+    // FW version specific settings and functionalities
+    bool _tcp_passive;
+    int32_t _recv_tcp_passive(int id, void *data, uint32_t amount, uint32_t timeout);
+    mbed::Callback<void()> _callback;
+
+    // UART settings
+    mbed::UARTSerial _serial;
+    PinName _serial_rts;
+    PinName _serial_cts;
+    rtos::Mutex _smutex; // Protect serial port access
+    rtos::Mutex _rmutex; // Reset protection
+
+    // AT Command Parser
+    mbed::ATCmdParser _parser;
+
+    // Wifi scan result handling
+    bool _recv_ap(nsapi_wifi_ap_t *ap);
+
+    // Socket data buffer
+    struct packet {
+        struct packet *next;
+        int id;
+        uint32_t len; // Remaining length
+        uint32_t alloc_len; // Original length
+        // data follows
+    } *_packets, * *_packets_end;
+    void _clear_socket_packets(int id);
+    int _sock_active_id;
+
+    // Memory statistics
+    size_t _heap_usage; // (Socket data buffer usage)
+
+    // OOB processing
+    void _process_oob(uint32_t timeout, bool all);
+
+    // OOB message handlers
+    void _oob_packet_hdlr();
+    void _oob_connect_err();
+    void _oob_conn_already();
+    void _oob_err();
+    void _oob_socket0_closed();
+    void _oob_socket1_closed();
+    void _oob_socket2_closed();
+    void _oob_socket3_closed();
+    void _oob_socket4_closed();
+    void _oob_connection_status();
+    void _oob_socket_close_err();
+    void _oob_watchdog_reset();
+    void _oob_busy();
+    void _oob_tcp_data_hdlr();
+    void _oob_ready();
+    void _oob_scan_results();
+
+    // OOB state variables
+    int _connect_error;
+    bool _disconnect;
+    bool _fail;
+    bool _sock_already;
+    bool _closed;
+    bool _error;
+    bool _busy;
+    rtos::ConditionVariable _reset_check;
+    bool _reset_done;
+
+    // Modem's address info
+    char _ip_buffer[16];
+    char _gateway_buffer[16];
+    char _netmask_buffer[16];
+    char _mac_buffer[18];
+
+    // Modem's socket info
+    struct _sock_info {
+        bool open;
+        nsapi_protocol_t proto;
+        char *tcp_data;
+        int32_t tcp_data_avbl; // Data waiting on modem
+        int32_t tcp_data_rcvd;
+    };
+    struct _sock_info _sock_i[SOCKET_COUNT];
+
+    // Scan results
+    struct _scan_results {
+        WiFiAccessPoint *res;
+        unsigned limit;
+        unsigned cnt;
+    };
+    struct _scan_results _scan_r;
+
+    // Connection state reporting
+    nsapi_connection_status_t _conn_status;
+    mbed::Callback<void()> _conn_stat_cb; // ESP8266Interface registered
+};
+#endif
+#endif