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ESP8266/ESP8266.cpp@15:37a7a56a424f, 2014-11-30 (annotated)

Committer:
michaeljkoster
Date:
Sun Nov 30 21:56:03 2014 +0000
Revision:
15:37a7a56a424f
Parent:
14:4d1128f72e00
Child:
16:3f0efaa57a12
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 1:fb4494783863 1 /* Copyright (C) 2012 mbed.org, MIT License
samux 1:fb4494783863 2 *
samux 1:fb4494783863 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:fb4494783863 4 * and associated documentation files (the "Software"), to deal in the Software without restriction,
samux 1:fb4494783863 5 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
samux 1:fb4494783863 6 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
samux 1:fb4494783863 7 * furnished to do so, subject to the following conditions:
samux 1:fb4494783863 8 *
samux 1:fb4494783863 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:fb4494783863 10 * substantial portions of the Software.
samux 1:fb4494783863 11 *
samux 1:fb4494783863 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:fb4494783863 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:fb4494783863 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:fb4494783863 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:fb4494783863 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:fb4494783863 17 */
samux 1:fb4494783863 18
samux 1:fb4494783863 19 #include "mbed.h"
michaeljkoster 13:41098c907200 20 #include "ESP8266.h"
samux 1:fb4494783863 21 #include <string>
samux 1:fb4494783863 22 #include <algorithm>
samux 1:fb4494783863 23
samux 1:fb4494783863 24 //Debug is disabled by default
screamer 10:131675c17372 25 #if (defined(DEBUG))
michaeljkoster 13:41098c907200 26 #define DBG(x, ...) std::printf("[ESP8266 : DBG]"x"\r\n", ##__VA_ARGS__);
michaeljkoster 13:41098c907200 27 #define WARN(x, ...) std::printf("[ESP8266 : WARN]"x"\r\n", ##__VA_ARGS__);
michaeljkoster 13:41098c907200 28 #define ERR(x, ...) std::printf("[ESP8266 : ERR]"x"\r\n", ##__VA_ARGS__);
samux 1:fb4494783863 29 #else
samux 1:fb4494783863 30 #define DBG(x, ...)
samux 1:fb4494783863 31 #define WARN(x, ...)
samux 1:fb4494783863 32 #define ERR(x, ...)
samux 1:fb4494783863 33 #endif
samux 1:fb4494783863 34
screamer 10:131675c17372 35 #if defined(DEBUG)
michaeljkoster 13:41098c907200 36 #define INFO(x, ...) printf("[ESP8266 : INFO]"x"\r\n", ##__VA_ARGS__);
samux 1:fb4494783863 37 #else
samux 1:fb4494783863 38 #define INFO(x, ...)
samux 1:fb4494783863 39 #endif
samux 1:fb4494783863 40
samux 1:fb4494783863 41 #define MAX_TRY_JOIN 3
samux 1:fb4494783863 42
michaeljkoster 12:c5f0eac67a8a 43 extern Serial pc;
michaeljkoster 12:c5f0eac67a8a 44
michaeljkoster 13:41098c907200 45 ESP8266 * ESP8266::inst;
samux 1:fb4494783863 46
michaeljkoster 13:41098c907200 47 ESP8266::ESP8266( PinName tx, PinName rx, PinName _reset, const char * ssid, const char * phrase ):
michaeljkoster 13:41098c907200 48 wifi(tx, rx), reset_pin(_reset), buf_ESP8266(256)
samux 1:fb4494783863 49 {
samux 1:fb4494783863 50 memset(&state, 0, sizeof(state));
samux 1:fb4494783863 51
samux 1:fb4494783863 52 // change all ' ' in '$' in the ssid and the passphrase
samux 1:fb4494783863 53 strcpy(this->ssid, ssid);
samux 1:fb4494783863 54 for (int i = 0; i < strlen(ssid); i++) {
samux 1:fb4494783863 55 if (this->ssid[i] == ' ')
samux 1:fb4494783863 56 this->ssid[i] = '$';
samux 1:fb4494783863 57 }
samux 1:fb4494783863 58 strcpy(this->phrase, phrase);
samux 1:fb4494783863 59 for (int i = 0; i < strlen(phrase); i++) {
samux 1:fb4494783863 60 if (this->phrase[i] == ' ')
samux 1:fb4494783863 61 this->phrase[i] = '$';
samux 1:fb4494783863 62 }
samux 1:fb4494783863 63
samux 1:fb4494783863 64 inst = this;
samux 1:fb4494783863 65 attach_rx(false);
samux 1:fb4494783863 66 }
samux 1:fb4494783863 67
michaeljkoster 13:41098c907200 68 bool ESP8266::join()
samux 1:fb4494783863 69 {
samux 1:fb4494783863 70
samux 1:fb4494783863 71 for (int i= 0; i < MAX_TRY_JOIN; i++) {
samux 2:8e54830d0df7 72
samux 1:fb4494783863 73 //join the network
samux 1:fb4494783863 74 state.associated = true;
michaeljkoster 13:41098c907200 75 INFO("\r\nssid: %s\r\nphrase: %s\r\nsecurity: %s\r\n\r\n", this->ssid, this->phrase);
samux 1:fb4494783863 76 return true;
samux 1:fb4494783863 77 }
samux 1:fb4494783863 78 return false;
samux 1:fb4494783863 79 }
samux 1:fb4494783863 80
michaeljkoster 13:41098c907200 81 bool ESP8266::connect()
samux 1:fb4494783863 82 {
michaeljkoster 13:41098c907200 83 return join();
samux 1:fb4494783863 84 }
samux 1:fb4494783863 85
michaeljkoster 15:37a7a56a424f 86 bool ESP8266::is_connected()
michaeljkoster 15:37a7a56a424f 87 {
michaeljkoster 15:37a7a56a424f 88 return true;
michaeljkoster 15:37a7a56a424f 89 }
michaeljkoster 15:37a7a56a424f 90
michaeljkoster 15:37a7a56a424f 91 bool ESP8266::close()
michaeljkoster 15:37a7a56a424f 92 {
michaeljkoster 15:37a7a56a424f 93 return true;
michaeljkoster 15:37a7a56a424f 94 }
michaeljkoster 15:37a7a56a424f 95
michaeljkoster 15:37a7a56a424f 96 bool ESP8266::disconnect()
michaeljkoster 15:37a7a56a424f 97 {
michaeljkoster 15:37a7a56a424f 98 // if already disconnected, return
michaeljkoster 15:37a7a56a424f 99 if (!state.associated)
michaeljkoster 15:37a7a56a424f 100 return true;
michaeljkoster 15:37a7a56a424f 101 // send command to quit AP
michaeljkoster 15:37a7a56a424f 102 //
michaeljkoster 15:37a7a56a424f 103 state.associated = false;
michaeljkoster 15:37a7a56a424f 104 return true;
michaeljkoster 15:37a7a56a424f 105 }
michaeljkoster 15:37a7a56a424f 106
michaeljkoster 15:37a7a56a424f 107 char* ESP8266::getIPAddress()
michaeljkoster 15:37a7a56a424f 108 {
michaeljkoster 15:37a7a56a424f 109 return ipString;
michaeljkoster 15:37a7a56a424f 110 }
michaeljkoster 15:37a7a56a424f 111
michaeljkoster 13:41098c907200 112 bool ESP8266::gethostbyname(const char * host, char * ip)
samux 1:fb4494783863 113 {
samux 1:fb4494783863 114 string h = host;
samux 1:fb4494783863 115 int nb_digits = 0;
samux 1:fb4494783863 116
samux 1:fb4494783863 117 // no dns needed
samux 1:fb4494783863 118 int pos = h.find(".");
samux 1:fb4494783863 119 if (pos != string::npos) {
samux 1:fb4494783863 120 string sub = h.substr(0, h.find("."));
samux 1:fb4494783863 121 nb_digits = atoi(sub.c_str());
samux 1:fb4494783863 122 }
samux 1:fb4494783863 123 //printf("substrL %s\r\n", sub.c_str());
samux 1:fb4494783863 124 if (count(h.begin(), h.end(), '.') == 3 && nb_digits > 0) {
samux 1:fb4494783863 125 strcpy(ip, host);
michaeljkoster 13:41098c907200 126 return true;
samux 1:fb4494783863 127 }
samux 1:fb4494783863 128 else {
michaeljkoster 13:41098c907200 129 // dns needed, not currently available
michaeljkoster 13:41098c907200 130 return false;
michaeljkoster 13:41098c907200 131 }
michaeljkoster 13:41098c907200 132 }
samux 1:fb4494783863 133
michaeljkoster 13:41098c907200 134 void ESP8266::reset()
samux 1:fb4494783863 135 {
samux 1:fb4494783863 136 reset_pin = 0;
samux 1:fb4494783863 137 wait(0.2);
samux 1:fb4494783863 138 reset_pin = 1;
samux 1:fb4494783863 139 wait(0.2);
samux 1:fb4494783863 140 }
samux 1:fb4494783863 141
michaeljkoster 13:41098c907200 142 bool ESP8266::reboot()
samux 3:9aa05e19c62e 143 {
samux 3:9aa05e19c62e 144 return true;
samux 3:9aa05e19c62e 145 }
samux 3:9aa05e19c62e 146
michaeljkoster 15:37a7a56a424f 147 void ESP8266::handler_rx(void)
samux 1:fb4494783863 148 {
michaeljkoster 15:37a7a56a424f 149 //read characters
michaeljkoster 15:37a7a56a424f 150 while (wifi.readable())
michaeljkoster 15:37a7a56a424f 151 buf_ESP8266.queue(wifi.getc());
michaeljkoster 15:37a7a56a424f 152 }
michaeljkoster 15:37a7a56a424f 153
michaeljkoster 15:37a7a56a424f 154 void ESP8266::attach_rx(bool callback)
michaeljkoster 15:37a7a56a424f 155 {
michaeljkoster 15:37a7a56a424f 156 if (!callback)
michaeljkoster 15:37a7a56a424f 157 wifi.attach(NULL);
michaeljkoster 15:37a7a56a424f 158 else
michaeljkoster 15:37a7a56a424f 159 wifi.attach(this, &ESP8266::handler_rx);
samux 1:fb4494783863 160 }
samux 1:fb4494783863 161
michaeljkoster 13:41098c907200 162 int ESP8266::readable()
samux 1:fb4494783863 163 {
michaeljkoster 13:41098c907200 164 return buf_ESP8266.available();
samux 1:fb4494783863 165 }
samux 1:fb4494783863 166
michaeljkoster 13:41098c907200 167 int ESP8266::writeable()
samux 1:fb4494783863 168 {
samux 1:fb4494783863 169 return wifi.writeable();
samux 1:fb4494783863 170 }
samux 1:fb4494783863 171
michaeljkoster 13:41098c907200 172 char ESP8266::getc()
samux 1:fb4494783863 173 {
michaeljkoster 14:4d1128f72e00 174 char c=0;
michaeljkoster 13:41098c907200 175 while (!buf_ESP8266.available());
michaeljkoster 13:41098c907200 176 buf_ESP8266.dequeue(&c);
samux 1:fb4494783863 177 return c;
samux 1:fb4494783863 178 }
samux 1:fb4494783863 179
michaeljkoster 15:37a7a56a424f 180 int ESP8266::putc(char c)
samux 1:fb4494783863 181 {
michaeljkoster 15:37a7a56a424f 182 while (!wifi.writeable());
michaeljkoster 15:37a7a56a424f 183 return wifi.putc(c);
samux 1:fb4494783863 184 }
samux 1:fb4494783863 185
michaeljkoster 15:37a7a56a424f 186 void ESP8266::flush()
samux 1:fb4494783863 187 {
michaeljkoster 15:37a7a56a424f 188 buf_ESP8266.flush();
samux 1:fb4494783863 189 }
samux 1:fb4494783863 190
michaeljkoster 15:37a7a56a424f 191 bool ESP8266::sendCommand(const char * cmd, const char * ack, char * res, int timeout)
michaeljkoster 15:37a7a56a424f 192 {
michaeljkoster 15:37a7a56a424f 193 return true;
michaeljkoster 15:37a7a56a424f 194 }
samux 1:fb4494783863 195
michaeljkoster 13:41098c907200 196 int ESP8266::send(const char * str, int len, const char * ACK, char * res, int timeout)
samux 1:fb4494783863 197 {
samux 1:fb4494783863 198 char read;
samux 1:fb4494783863 199 size_t found = string::npos;
samux 1:fb4494783863 200 string checking;
samux 1:fb4494783863 201 Timer tmr;
samux 1:fb4494783863 202 int result = 0;
samux 1:fb4494783863 203
samux 1:fb4494783863 204 DBG("will send: %s\r\n",str);
samux 1:fb4494783863 205
samux 1:fb4494783863 206 attach_rx(false);
samux 1:fb4494783863 207
samux 1:fb4494783863 208 //We flush the buffer
samux 1:fb4494783863 209 while (wifi.readable())
samux 1:fb4494783863 210 wifi.getc();
samux 1:fb4494783863 211
samux 1:fb4494783863 212 if (!ACK || !strcmp(ACK, "NO")) {
samux 1:fb4494783863 213 for (int i = 0; i < len; i++)
samux 1:fb4494783863 214 result = (putc(str[i]) == str[i]) ? result + 1 : result;
samux 1:fb4494783863 215 } else {
samux 1:fb4494783863 216 //We flush the buffer
samux 1:fb4494783863 217 while (wifi.readable())
samux 1:fb4494783863 218 wifi.getc();
samux 1:fb4494783863 219
samux 1:fb4494783863 220 tmr.start();
samux 1:fb4494783863 221 for (int i = 0; i < len; i++)
samux 1:fb4494783863 222 result = (putc(str[i]) == str[i]) ? result + 1 : result;
samux 1:fb4494783863 223
samux 1:fb4494783863 224 while (1) {
samux 1:fb4494783863 225 if (tmr.read_ms() > timeout) {
samux 1:fb4494783863 226 //We flush the buffer
samux 1:fb4494783863 227 while (wifi.readable())
samux 1:fb4494783863 228 wifi.getc();
samux 1:fb4494783863 229
samux 1:fb4494783863 230 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 231
samux 1:fb4494783863 232 attach_rx(true);
samux 1:fb4494783863 233 return -1;
samux 1:fb4494783863 234 } else if (wifi.readable()) {
samux 1:fb4494783863 235 read = wifi.getc();
samux 1:fb4494783863 236 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 237 checking += read;
samux 1:fb4494783863 238 found = checking.find(ACK);
samux 1:fb4494783863 239 if (found != string::npos) {
samux 1:fb4494783863 240 wait(0.01);
samux 1:fb4494783863 241
samux 1:fb4494783863 242 //We flush the buffer
samux 1:fb4494783863 243 while (wifi.readable())
samux 1:fb4494783863 244 wifi.getc();
samux 1:fb4494783863 245
samux 1:fb4494783863 246 break;
samux 1:fb4494783863 247 }
samux 1:fb4494783863 248 }
samux 1:fb4494783863 249 }
samux 1:fb4494783863 250 }
samux 1:fb4494783863 251 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 252
samux 1:fb4494783863 253 attach_rx(true);
samux 1:fb4494783863 254 return result;
samux 1:fb4494783863 255 }
samux 1:fb4494783863 256
samux 1:fb4494783863 257 //the user wants the result from the command (ACK == NULL, res != NULL)
samux 1:fb4494783863 258 if ( res != NULL) {
samux 1:fb4494783863 259 int i = 0;
samux 1:fb4494783863 260 Timer timeout;
samux 1:fb4494783863 261 timeout.start();
samux 1:fb4494783863 262 tmr.reset();
samux 1:fb4494783863 263 while (1) {
samux 1:fb4494783863 264 if (timeout.read() > 2) {
samux 1:fb4494783863 265 if (i == 0) {
samux 1:fb4494783863 266 res = NULL;
samux 1:fb4494783863 267 break;
samux 1:fb4494783863 268 }
samux 1:fb4494783863 269 res[i] = '\0';
samux 1:fb4494783863 270 DBG("user str 1: %s\r\n", res);
samux 1:fb4494783863 271
samux 1:fb4494783863 272 break;
samux 1:fb4494783863 273 } else {
samux 1:fb4494783863 274 if (tmr.read_ms() > 300) {
samux 1:fb4494783863 275 res[i] = '\0';
samux 1:fb4494783863 276 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 277
samux 1:fb4494783863 278 break;
samux 1:fb4494783863 279 }
samux 1:fb4494783863 280 if (wifi.readable()) {
samux 1:fb4494783863 281 tmr.start();
samux 1:fb4494783863 282 read = wifi.getc();
samux 1:fb4494783863 283
samux 1:fb4494783863 284 // we drop \r and \n
samux 1:fb4494783863 285 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 286 res[i++] = read;
samux 1:fb4494783863 287 }
samux 1:fb4494783863 288 }
samux 1:fb4494783863 289 }
samux 1:fb4494783863 290 }
samux 1:fb4494783863 291 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 292 }
samux 1:fb4494783863 293
samux 1:fb4494783863 294 //We flush the buffer
samux 1:fb4494783863 295 while (wifi.readable())
samux 1:fb4494783863 296 wifi.getc();
samux 1:fb4494783863 297
samux 1:fb4494783863 298 attach_rx(true);
samux 1:fb4494783863 299 DBG("result: %d\r\n", result)
samux 1:fb4494783863 300 return result;
michaeljkoster 15:37a7a56a424f 301 }