Fawwaz Nadzmy / ESP8266Interface

Init

Fork of ESP8266Interface by ESP8266

Wifly/Wifly.cpp@1:fb4494783863, 2012-08-24 (annotated)

Committer:
samux
Date:
Fri Aug 24 13:48:36 2012 +0000
Revision:
1:fb4494783863
Child:
2:8e54830d0df7
Child:
7:3152fcc74390
first commit

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"
samux 1:fb4494783863 20 #include "Wifly.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
samux 1:fb4494783863 25 #if (0 && defined(TARGET_LPC1768))
samux 1:fb4494783863 26 #define DBG(x, ...) std::printf("[Wifly : DBG]"x"\r\n", ##__VA_ARGS__);
samux 1:fb4494783863 27 #define WARN(x, ...) std::printf("[Wifly : WARN]"x"\r\n", ##__VA_ARGS__);
samux 1:fb4494783863 28 #define ERR(x, ...) std::printf("[Wifly : 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
samux 1:fb4494783863 35 #if TARGET_LPC1768
samux 1:fb4494783863 36 #define INFO(x, ...) printf("[Wifly : 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
samux 1:fb4494783863 43 Wifly * Wifly::inst;
samux 1:fb4494783863 44
samux 1:fb4494783863 45 Wifly::Wifly( PinName tx, PinName rx, PinName _reset, PinName tcp_status, const char * ssid, const char * phrase, Security sec):
samux 1:fb4494783863 46 wifi(tx, rx), reset_pin(_reset), tcp_status(tcp_status), buf_wifly(256)
samux 1:fb4494783863 47 {
samux 1:fb4494783863 48 memset(&state, 0, sizeof(state));
samux 1:fb4494783863 49 state.sec = sec;
samux 1:fb4494783863 50
samux 1:fb4494783863 51 // change all ' ' in '$' in the ssid and the passphrase
samux 1:fb4494783863 52 strcpy(this->ssid, ssid);
samux 1:fb4494783863 53 for (int i = 0; i < strlen(ssid); i++) {
samux 1:fb4494783863 54 if (this->ssid[i] == ' ')
samux 1:fb4494783863 55 this->ssid[i] = '$';
samux 1:fb4494783863 56 }
samux 1:fb4494783863 57 strcpy(this->phrase, phrase);
samux 1:fb4494783863 58 for (int i = 0; i < strlen(phrase); i++) {
samux 1:fb4494783863 59 if (this->phrase[i] == ' ')
samux 1:fb4494783863 60 this->phrase[i] = '$';
samux 1:fb4494783863 61 }
samux 1:fb4494783863 62
samux 1:fb4494783863 63 inst = this;
samux 1:fb4494783863 64 attach_rx(false);
samux 1:fb4494783863 65 state.cmd_mode = false;
samux 1:fb4494783863 66 }
samux 1:fb4494783863 67
samux 1:fb4494783863 68 bool Wifly::join()
samux 1:fb4494783863 69 {
samux 1:fb4494783863 70 char cmd[20];
samux 1:fb4494783863 71
samux 1:fb4494783863 72 for (int i= 0; i < MAX_TRY_JOIN; i++) {
samux 1:fb4494783863 73 // set time
samux 1:fb4494783863 74 if (!sendCommand("set c t 20\r", "AOK"))
samux 1:fb4494783863 75 continue;
samux 1:fb4494783863 76
samux 1:fb4494783863 77 // set size
samux 1:fb4494783863 78 if (!sendCommand("set c s 128\r", "AOK"))
samux 1:fb4494783863 79 continue;
samux 1:fb4494783863 80
samux 1:fb4494783863 81 // red led on when tcp connection active
samux 1:fb4494783863 82 if (!sendCommand("set s i 0x40\r", "AOK"))
samux 1:fb4494783863 83 continue;
samux 1:fb4494783863 84
samux 1:fb4494783863 85 // no string sent to the tcp client
samux 1:fb4494783863 86 if (!sendCommand("set c r 0\r", "AOK"))
samux 1:fb4494783863 87 continue;
samux 1:fb4494783863 88
samux 1:fb4494783863 89 // tcp protocol
samux 1:fb4494783863 90 if (!sendCommand("set i p 2\r", "AOK"))
samux 1:fb4494783863 91 continue;
samux 1:fb4494783863 92
samux 1:fb4494783863 93 // tcp retry
samux 1:fb4494783863 94 if (!sendCommand("set i f 0x7\r", "AOK"))
samux 1:fb4494783863 95 continue;
samux 1:fb4494783863 96
samux 1:fb4494783863 97 //no echo
samux 1:fb4494783863 98 if (!sendCommand("set u m 1\r", "AOK"))
samux 1:fb4494783863 99 continue;
samux 1:fb4494783863 100
samux 1:fb4494783863 101 // no auto join
samux 1:fb4494783863 102 if (!sendCommand("set w j 0\r", "AOK"))
samux 1:fb4494783863 103 continue;
samux 1:fb4494783863 104
samux 1:fb4494783863 105 //dhcp
samux 1:fb4494783863 106 sprintf(cmd, "set i d %d\r", (state.dhcp) ? 1 : 0);
samux 1:fb4494783863 107 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 108 continue;
samux 1:fb4494783863 109
samux 1:fb4494783863 110 // ssid
samux 1:fb4494783863 111 sprintf(cmd, "set w s %s\r", ssid);
samux 1:fb4494783863 112 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 113 continue;
samux 1:fb4494783863 114
samux 1:fb4494783863 115 //auth
samux 1:fb4494783863 116 sprintf(cmd, "set w a %d\r", state.sec);
samux 1:fb4494783863 117 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 118 continue;
samux 1:fb4494783863 119
samux 1:fb4494783863 120 // if no dhcp, set ip, netmask and gateway
samux 1:fb4494783863 121 if (!state.dhcp) {
samux 1:fb4494783863 122 DBG("not dhcp\r");
samux 1:fb4494783863 123
samux 1:fb4494783863 124 sprintf(cmd, "set i a %s\r\n", ip);
samux 1:fb4494783863 125 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 126 continue;
samux 1:fb4494783863 127
samux 1:fb4494783863 128 sprintf(cmd, "set i n %s\r", netmask);
samux 1:fb4494783863 129 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 130 continue;
samux 1:fb4494783863 131
samux 1:fb4494783863 132 sprintf(cmd, "set i g %s\r", gateway);
samux 1:fb4494783863 133 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 134 continue;
samux 1:fb4494783863 135 }
samux 1:fb4494783863 136
samux 1:fb4494783863 137 //key step
samux 1:fb4494783863 138 if (state.sec != NONE) {
samux 1:fb4494783863 139 if (state.sec == WPA)
samux 1:fb4494783863 140 sprintf(cmd, "set w p %s\r", phrase);
samux 1:fb4494783863 141 else if (state.sec == WEP_128)
samux 1:fb4494783863 142 sprintf(cmd, "set w k %s\r", phrase);
samux 1:fb4494783863 143
samux 1:fb4494783863 144 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 145 continue;
samux 1:fb4494783863 146 }
samux 1:fb4494783863 147
samux 1:fb4494783863 148 //join the network
samux 1:fb4494783863 149 sprintf(cmd, "join\r");
samux 1:fb4494783863 150 if (!sendCommand(cmd, "Associated", NULL, 3000))
samux 1:fb4494783863 151 continue;
samux 1:fb4494783863 152
samux 1:fb4494783863 153 if (state.dhcp) {
samux 1:fb4494783863 154 if (!sendCommand("", "DHCP=ON", NULL, 3000))
samux 1:fb4494783863 155 continue;
samux 1:fb4494783863 156 }
samux 1:fb4494783863 157
samux 1:fb4494783863 158 exit();
samux 1:fb4494783863 159
samux 1:fb4494783863 160 state.associated = true;
samux 1:fb4494783863 161 INFO("\r\nssid: %s\r\nphrase: %s\r\nsecurity: %s\r\n\r\n", this->ssid, this->phrase, getStringSecurity());
samux 1:fb4494783863 162 return true;
samux 1:fb4494783863 163 }
samux 1:fb4494783863 164 return false;
samux 1:fb4494783863 165 }
samux 1:fb4494783863 166
samux 1:fb4494783863 167
samux 1:fb4494783863 168 bool Wifly::setProtocol(Protocol p)
samux 1:fb4494783863 169 {
samux 1:fb4494783863 170 // use udp auto pairing
samux 1:fb4494783863 171 char cmd[20];
samux 1:fb4494783863 172 sprintf(cmd, "set i p %d\r", p);
samux 1:fb4494783863 173 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 174 return false;
samux 1:fb4494783863 175
samux 1:fb4494783863 176 switch(p) {
samux 1:fb4494783863 177 case TCP:
samux 1:fb4494783863 178 // set ip flags: tcp retry enabled
samux 1:fb4494783863 179 if (!sendCommand("set i f 0x07\r", "AOK"))
samux 1:fb4494783863 180 return false;
samux 1:fb4494783863 181 break;
samux 1:fb4494783863 182 case UDP:
samux 1:fb4494783863 183 // set ip flags: udp auto pairing enabled
samux 1:fb4494783863 184 if (!sendCommand("set i f 0x40\r", "AOK"))
samux 1:fb4494783863 185 return false;
samux 1:fb4494783863 186 if (!sendCommand("set i h 0.0.0.0\r", "AOK"))
samux 1:fb4494783863 187 return false;
samux 1:fb4494783863 188 if (!sendCommand("set i r 0\r", "AOK"))
samux 1:fb4494783863 189 return false;
samux 1:fb4494783863 190 break;
samux 1:fb4494783863 191 }
samux 1:fb4494783863 192 state.proto = p;
samux 1:fb4494783863 193 return true;
samux 1:fb4494783863 194 }
samux 1:fb4494783863 195
samux 1:fb4494783863 196 char * Wifly::getStringSecurity()
samux 1:fb4494783863 197 {
samux 1:fb4494783863 198 switch(state.sec) {
samux 1:fb4494783863 199 case NONE:
samux 1:fb4494783863 200 return "NONE";
samux 1:fb4494783863 201 case WEP_128:
samux 1:fb4494783863 202 return "WEP_128";
samux 1:fb4494783863 203 case WPA:
samux 1:fb4494783863 204 return "WPA";
samux 1:fb4494783863 205 }
samux 1:fb4494783863 206 return "UNKNOWN";
samux 1:fb4494783863 207 }
samux 1:fb4494783863 208
samux 1:fb4494783863 209 bool Wifly::connect(const char * host, int port)
samux 1:fb4494783863 210 {
samux 1:fb4494783863 211 char rcv[20];
samux 1:fb4494783863 212 char cmd[20];
samux 1:fb4494783863 213
samux 1:fb4494783863 214 // get ip from host and set host
samux 1:fb4494783863 215 if (gethostbyname(host, rcv)) {
samux 1:fb4494783863 216 sprintf(cmd, "set i h %s\r", rcv);
samux 1:fb4494783863 217 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 218 return false;
samux 1:fb4494783863 219 } else {
samux 1:fb4494783863 220 return false;
samux 1:fb4494783863 221 }
samux 1:fb4494783863 222
samux 1:fb4494783863 223 // set port
samux 1:fb4494783863 224 sprintf(cmd, "set i r %d\r", port);
samux 1:fb4494783863 225 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 226 return false;
samux 1:fb4494783863 227
samux 1:fb4494783863 228 // open
samux 1:fb4494783863 229 if (sendCommand("open\r", NULL, rcv)) {
samux 1:fb4494783863 230 if (strstr(rcv, "OPEN") == NULL) {
samux 1:fb4494783863 231 if (strstr(rcv, "Connected") != NULL) {
samux 1:fb4494783863 232 if (!sendCommand("close\r", "CLOS"))
samux 1:fb4494783863 233 return false;
samux 1:fb4494783863 234 if (!sendCommand("open\r", "OPEN"))
samux 1:fb4494783863 235 return false;
samux 1:fb4494783863 236 } else {
samux 1:fb4494783863 237 return false;
samux 1:fb4494783863 238 }
samux 1:fb4494783863 239 }
samux 1:fb4494783863 240 } else {
samux 1:fb4494783863 241 return false;
samux 1:fb4494783863 242 }
samux 1:fb4494783863 243
samux 1:fb4494783863 244 state.tcp = true;
samux 1:fb4494783863 245 state.cmd_mode = false;
samux 1:fb4494783863 246
samux 1:fb4494783863 247 return true;
samux 1:fb4494783863 248 }
samux 1:fb4494783863 249
samux 1:fb4494783863 250
samux 1:fb4494783863 251 bool Wifly::gethostbyname(const char * host, char * ip)
samux 1:fb4494783863 252 {
samux 1:fb4494783863 253 string h = host;
samux 1:fb4494783863 254 char cmd[30], rcv[100];
samux 1:fb4494783863 255 int l = 0;
samux 1:fb4494783863 256 char * point;
samux 1:fb4494783863 257 int nb_digits = 0;
samux 1:fb4494783863 258
samux 1:fb4494783863 259 // no dns needed
samux 1:fb4494783863 260 int pos = h.find(".");
samux 1:fb4494783863 261 if (pos != string::npos) {
samux 1:fb4494783863 262 string sub = h.substr(0, h.find("."));
samux 1:fb4494783863 263 nb_digits = atoi(sub.c_str());
samux 1:fb4494783863 264 }
samux 1:fb4494783863 265 //printf("substrL %s\r\n", sub.c_str());
samux 1:fb4494783863 266 if (count(h.begin(), h.end(), '.') == 3 && nb_digits > 0) {
samux 1:fb4494783863 267 strcpy(ip, host);
samux 1:fb4494783863 268 }
samux 1:fb4494783863 269 // dns needed
samux 1:fb4494783863 270 else {
samux 1:fb4494783863 271 nb_digits = 0;
samux 1:fb4494783863 272 sprintf(cmd, "lookup %s\r", host);
samux 1:fb4494783863 273 if (!sendCommand(cmd, NULL, rcv))
samux 1:fb4494783863 274 return false;
samux 1:fb4494783863 275
samux 1:fb4494783863 276 // look for the ip address
samux 1:fb4494783863 277 char * begin = strstr(rcv, "=") + 1;
samux 1:fb4494783863 278 for (int i = 0; i < 3; i++) {
samux 1:fb4494783863 279 point = strstr(begin + l, ".");
samux 1:fb4494783863 280 DBG("str: %s", begin + l);
samux 1:fb4494783863 281 l += point - (begin + l) + 1;
samux 1:fb4494783863 282 }
samux 1:fb4494783863 283 DBG("str: %s", begin + l);
samux 1:fb4494783863 284 while(*(begin + l + nb_digits) >= '0' && *(begin + l + nb_digits) <= '9') {
samux 1:fb4494783863 285 DBG("digit: %c", *(begin + l + nb_digits));
samux 1:fb4494783863 286 nb_digits++;
samux 1:fb4494783863 287 }
samux 1:fb4494783863 288 memcpy(ip, begin, l + nb_digits);
samux 1:fb4494783863 289 ip[l+nb_digits] = 0;
samux 1:fb4494783863 290 DBG("ip from dns: %s", ip);
samux 1:fb4494783863 291 }
samux 1:fb4494783863 292 return true;
samux 1:fb4494783863 293 }
samux 1:fb4494783863 294
samux 1:fb4494783863 295
samux 1:fb4494783863 296 void Wifly::flush()
samux 1:fb4494783863 297 {
samux 1:fb4494783863 298 buf_wifly.flush();
samux 1:fb4494783863 299 }
samux 1:fb4494783863 300
samux 1:fb4494783863 301 bool Wifly::sendCommand(const char * cmd, const char * ack, char * res, int timeout)
samux 1:fb4494783863 302 {
samux 1:fb4494783863 303 if (!state.cmd_mode) {
samux 1:fb4494783863 304 cmdMode();
samux 1:fb4494783863 305 }
samux 1:fb4494783863 306 if (send(cmd, strlen(cmd), ack, res, timeout) == -1) {
samux 1:fb4494783863 307 ERR("sendCommand: cannot %s\r\n", cmd);
samux 1:fb4494783863 308 exit();
samux 1:fb4494783863 309 return false;
samux 1:fb4494783863 310 }
samux 1:fb4494783863 311 return true;
samux 1:fb4494783863 312 }
samux 1:fb4494783863 313
samux 1:fb4494783863 314 bool Wifly::cmdMode()
samux 1:fb4494783863 315 {
samux 1:fb4494783863 316 // if already in cmd mode, return
samux 1:fb4494783863 317 if (state.cmd_mode)
samux 1:fb4494783863 318 return true;
samux 1:fb4494783863 319
samux 1:fb4494783863 320 if (send("$$$", 3, "CMD") == -1) {
samux 1:fb4494783863 321 ERR("cannot enter in cmd mode\r\n");
samux 1:fb4494783863 322 return false;
samux 1:fb4494783863 323 }
samux 1:fb4494783863 324 state.cmd_mode = true;
samux 1:fb4494783863 325 return true;
samux 1:fb4494783863 326 }
samux 1:fb4494783863 327
samux 1:fb4494783863 328 bool Wifly::disconnect()
samux 1:fb4494783863 329 {
samux 1:fb4494783863 330 // if already disconnected, return
samux 1:fb4494783863 331 if (!state.associated)
samux 1:fb4494783863 332 return true;
samux 1:fb4494783863 333
samux 1:fb4494783863 334 if (!sendCommand("leave\r", "DeAuth"))
samux 1:fb4494783863 335 return false;
samux 1:fb4494783863 336 exit();
samux 1:fb4494783863 337
samux 1:fb4494783863 338 state.associated = false;
samux 1:fb4494783863 339 return true;
samux 1:fb4494783863 340
samux 1:fb4494783863 341 }
samux 1:fb4494783863 342
samux 1:fb4494783863 343 bool Wifly::is_connected()
samux 1:fb4494783863 344 {
samux 1:fb4494783863 345 return (tcp_status.read() == 1) ? true : false;
samux 1:fb4494783863 346 }
samux 1:fb4494783863 347
samux 1:fb4494783863 348
samux 1:fb4494783863 349 void Wifly::reset()
samux 1:fb4494783863 350 {
samux 1:fb4494783863 351 reset_pin = 0;
samux 1:fb4494783863 352 wait(0.2);
samux 1:fb4494783863 353 reset_pin = 1;
samux 1:fb4494783863 354 wait(0.2);
samux 1:fb4494783863 355 }
samux 1:fb4494783863 356
samux 1:fb4494783863 357 bool Wifly::close()
samux 1:fb4494783863 358 {
samux 1:fb4494783863 359 // if not connected, return
samux 1:fb4494783863 360 if (!state.tcp)
samux 1:fb4494783863 361 return true;
samux 1:fb4494783863 362
samux 1:fb4494783863 363 wait(0.25);
samux 1:fb4494783863 364 if (!sendCommand("close\r", "CLOS"))
samux 1:fb4494783863 365 return false;
samux 1:fb4494783863 366 exit();
samux 1:fb4494783863 367
samux 1:fb4494783863 368 state.tcp = false;
samux 1:fb4494783863 369 return true;
samux 1:fb4494783863 370 }
samux 1:fb4494783863 371
samux 1:fb4494783863 372
samux 1:fb4494783863 373 int Wifly::putc(char c)
samux 1:fb4494783863 374 {
samux 1:fb4494783863 375 while (!wifi.writeable());
samux 1:fb4494783863 376 return wifi.putc(c);
samux 1:fb4494783863 377 }
samux 1:fb4494783863 378
samux 1:fb4494783863 379
samux 1:fb4494783863 380 bool Wifly::exit()
samux 1:fb4494783863 381 {
samux 1:fb4494783863 382 flush();
samux 1:fb4494783863 383 if (!state.cmd_mode)
samux 1:fb4494783863 384 return true;
samux 1:fb4494783863 385 if (!sendCommand("exit\r", "EXIT"))
samux 1:fb4494783863 386 return false;
samux 1:fb4494783863 387 state.cmd_mode = false;
samux 1:fb4494783863 388 flush();
samux 1:fb4494783863 389 return true;
samux 1:fb4494783863 390 }
samux 1:fb4494783863 391
samux 1:fb4494783863 392
samux 1:fb4494783863 393 int Wifly::readable()
samux 1:fb4494783863 394 {
samux 1:fb4494783863 395 return buf_wifly.available();
samux 1:fb4494783863 396 }
samux 1:fb4494783863 397
samux 1:fb4494783863 398 int Wifly::writeable()
samux 1:fb4494783863 399 {
samux 1:fb4494783863 400 return wifi.writeable();
samux 1:fb4494783863 401 }
samux 1:fb4494783863 402
samux 1:fb4494783863 403 char Wifly::getc()
samux 1:fb4494783863 404 {
samux 1:fb4494783863 405 char c;
samux 1:fb4494783863 406 while (!buf_wifly.available());
samux 1:fb4494783863 407 buf_wifly.dequeue(&c);
samux 1:fb4494783863 408 return c;
samux 1:fb4494783863 409 }
samux 1:fb4494783863 410
samux 1:fb4494783863 411 void Wifly::handler_rx(void)
samux 1:fb4494783863 412 {
samux 1:fb4494783863 413 //read characters
samux 1:fb4494783863 414 while (wifi.readable())
samux 1:fb4494783863 415 buf_wifly.queue(wifi.getc());
samux 1:fb4494783863 416 }
samux 1:fb4494783863 417
samux 1:fb4494783863 418 void Wifly::attach_rx(bool callback)
samux 1:fb4494783863 419 {
samux 1:fb4494783863 420 if (!callback)
samux 1:fb4494783863 421 wifi.attach(NULL);
samux 1:fb4494783863 422 else
samux 1:fb4494783863 423 wifi.attach(this, &Wifly::handler_rx);
samux 1:fb4494783863 424 }
samux 1:fb4494783863 425
samux 1:fb4494783863 426
samux 1:fb4494783863 427 int Wifly::send(const char * str, int len, const char * ACK, char * res, int timeout)
samux 1:fb4494783863 428 {
samux 1:fb4494783863 429 char read;
samux 1:fb4494783863 430 size_t found = string::npos;
samux 1:fb4494783863 431 string checking;
samux 1:fb4494783863 432 Timer tmr;
samux 1:fb4494783863 433 int result = 0;
samux 1:fb4494783863 434
samux 1:fb4494783863 435 DBG("will send: %s\r\n",str);
samux 1:fb4494783863 436
samux 1:fb4494783863 437 attach_rx(false);
samux 1:fb4494783863 438
samux 1:fb4494783863 439 //We flush the buffer
samux 1:fb4494783863 440 while (wifi.readable())
samux 1:fb4494783863 441 wifi.getc();
samux 1:fb4494783863 442
samux 1:fb4494783863 443 if (!ACK || !strcmp(ACK, "NO")) {
samux 1:fb4494783863 444 for (int i = 0; i < len; i++)
samux 1:fb4494783863 445 result = (putc(str[i]) == str[i]) ? result + 1 : result;
samux 1:fb4494783863 446 } else {
samux 1:fb4494783863 447 //We flush the buffer
samux 1:fb4494783863 448 while (wifi.readable())
samux 1:fb4494783863 449 wifi.getc();
samux 1:fb4494783863 450
samux 1:fb4494783863 451 tmr.start();
samux 1:fb4494783863 452 for (int i = 0; i < len; i++)
samux 1:fb4494783863 453 result = (putc(str[i]) == str[i]) ? result + 1 : result;
samux 1:fb4494783863 454
samux 1:fb4494783863 455 while (1) {
samux 1:fb4494783863 456 if (tmr.read_ms() > timeout) {
samux 1:fb4494783863 457 //We flush the buffer
samux 1:fb4494783863 458 while (wifi.readable())
samux 1:fb4494783863 459 wifi.getc();
samux 1:fb4494783863 460
samux 1:fb4494783863 461 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 462
samux 1:fb4494783863 463 attach_rx(true);
samux 1:fb4494783863 464 return -1;
samux 1:fb4494783863 465 } else if (wifi.readable()) {
samux 1:fb4494783863 466 read = wifi.getc();
samux 1:fb4494783863 467 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 468 checking += read;
samux 1:fb4494783863 469 found = checking.find(ACK);
samux 1:fb4494783863 470 if (found != string::npos) {
samux 1:fb4494783863 471 wait(0.01);
samux 1:fb4494783863 472
samux 1:fb4494783863 473 //We flush the buffer
samux 1:fb4494783863 474 while (wifi.readable())
samux 1:fb4494783863 475 wifi.getc();
samux 1:fb4494783863 476
samux 1:fb4494783863 477 break;
samux 1:fb4494783863 478 }
samux 1:fb4494783863 479 }
samux 1:fb4494783863 480 }
samux 1:fb4494783863 481 }
samux 1:fb4494783863 482 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 483
samux 1:fb4494783863 484 attach_rx(true);
samux 1:fb4494783863 485 return result;
samux 1:fb4494783863 486 }
samux 1:fb4494783863 487
samux 1:fb4494783863 488 //the user wants the result from the command (ACK == NULL, res != NULL)
samux 1:fb4494783863 489 if ( res != NULL) {
samux 1:fb4494783863 490 int i = 0;
samux 1:fb4494783863 491 Timer timeout;
samux 1:fb4494783863 492 timeout.start();
samux 1:fb4494783863 493 tmr.reset();
samux 1:fb4494783863 494 while (1) {
samux 1:fb4494783863 495 if (timeout.read() > 2) {
samux 1:fb4494783863 496 if (i == 0) {
samux 1:fb4494783863 497 res = NULL;
samux 1:fb4494783863 498 break;
samux 1:fb4494783863 499 }
samux 1:fb4494783863 500 res[i] = '\0';
samux 1:fb4494783863 501 DBG("user str 1: %s\r\n", res);
samux 1:fb4494783863 502
samux 1:fb4494783863 503 break;
samux 1:fb4494783863 504 } else {
samux 1:fb4494783863 505 if (tmr.read_ms() > 300) {
samux 1:fb4494783863 506 res[i] = '\0';
samux 1:fb4494783863 507 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 508
samux 1:fb4494783863 509 break;
samux 1:fb4494783863 510 }
samux 1:fb4494783863 511 if (wifi.readable()) {
samux 1:fb4494783863 512 tmr.start();
samux 1:fb4494783863 513 read = wifi.getc();
samux 1:fb4494783863 514
samux 1:fb4494783863 515 // we drop \r and \n
samux 1:fb4494783863 516 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 517 res[i++] = read;
samux 1:fb4494783863 518 }
samux 1:fb4494783863 519 }
samux 1:fb4494783863 520 }
samux 1:fb4494783863 521 }
samux 1:fb4494783863 522 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 523 }
samux 1:fb4494783863 524
samux 1:fb4494783863 525 //We flush the buffer
samux 1:fb4494783863 526 while (wifi.readable())
samux 1:fb4494783863 527 wifi.getc();
samux 1:fb4494783863 528
samux 1:fb4494783863 529 attach_rx(true);
samux 1:fb4494783863 530 DBG("result: %d\r\n", result)
samux 1:fb4494783863 531 return result;
samux 1:fb4494783863 532 }