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