jollen chen / WiflyInterface

Improve Wifly Interface

Fork of WiflyInterface by Components

Wifly/Wifly.cpp@7:3152fcc74390, 2013-11-08 (annotated)

Committer:
lz307
Date:
Fri Nov 08 21:27:08 2013 +0000
Revision:
7:3152fcc74390
Parent:
1:fb4494783863
Child:
8:04afe20d7927
Child:
10:131675c17372
Added delay to accommodate slow speed on the seeed wifi shield.

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
lz307 7:3152fcc74390 25 #if (1 && 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);
lz307 7:3152fcc74390 112 if (!sendCommand(cmd, "AOK", NULL, 1000))
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
lz307 7:3152fcc74390 144 if (!sendCommand(cmd, "AOK", NULL, 1000))
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;
lz307 7:3152fcc74390 152
lz307 7:3152fcc74390 153 if (!sendCommand("", "IP=", NULL, 10000))
lz307 7:3152fcc74390 154 continue;
samux 1:fb4494783863 155
samux 1:fb4494783863 156 if (state.dhcp) {
lz307 7:3152fcc74390 157 if (!sendCommand("get i\r", "DHCP=ON", NULL, 3000))
samux 1:fb4494783863 158 continue;
samux 1:fb4494783863 159 }
samux 1:fb4494783863 160
samux 1:fb4494783863 161 exit();
samux 1:fb4494783863 162
samux 1:fb4494783863 163 state.associated = true;
samux 1:fb4494783863 164 INFO("\r\nssid: %s\r\nphrase: %s\r\nsecurity: %s\r\n\r\n", this->ssid, this->phrase, getStringSecurity());
samux 1:fb4494783863 165 return true;
samux 1:fb4494783863 166 }
samux 1:fb4494783863 167 return false;
samux 1:fb4494783863 168 }
samux 1:fb4494783863 169
samux 1:fb4494783863 170
samux 1:fb4494783863 171 bool Wifly::setProtocol(Protocol p)
samux 1:fb4494783863 172 {
samux 1:fb4494783863 173 // use udp auto pairing
samux 1:fb4494783863 174 char cmd[20];
samux 1:fb4494783863 175 sprintf(cmd, "set i p %d\r", p);
samux 1:fb4494783863 176 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 177 return false;
samux 1:fb4494783863 178
samux 1:fb4494783863 179 switch(p) {
samux 1:fb4494783863 180 case TCP:
samux 1:fb4494783863 181 // set ip flags: tcp retry enabled
samux 1:fb4494783863 182 if (!sendCommand("set i f 0x07\r", "AOK"))
samux 1:fb4494783863 183 return false;
samux 1:fb4494783863 184 break;
samux 1:fb4494783863 185 case UDP:
samux 1:fb4494783863 186 // set ip flags: udp auto pairing enabled
samux 1:fb4494783863 187 if (!sendCommand("set i f 0x40\r", "AOK"))
samux 1:fb4494783863 188 return false;
samux 1:fb4494783863 189 if (!sendCommand("set i h 0.0.0.0\r", "AOK"))
samux 1:fb4494783863 190 return false;
samux 1:fb4494783863 191 if (!sendCommand("set i r 0\r", "AOK"))
samux 1:fb4494783863 192 return false;
samux 1:fb4494783863 193 break;
samux 1:fb4494783863 194 }
samux 1:fb4494783863 195 state.proto = p;
samux 1:fb4494783863 196 return true;
samux 1:fb4494783863 197 }
samux 1:fb4494783863 198
samux 1:fb4494783863 199 char * Wifly::getStringSecurity()
samux 1:fb4494783863 200 {
samux 1:fb4494783863 201 switch(state.sec) {
samux 1:fb4494783863 202 case NONE:
samux 1:fb4494783863 203 return "NONE";
samux 1:fb4494783863 204 case WEP_128:
samux 1:fb4494783863 205 return "WEP_128";
samux 1:fb4494783863 206 case WPA:
samux 1:fb4494783863 207 return "WPA";
samux 1:fb4494783863 208 }
samux 1:fb4494783863 209 return "UNKNOWN";
samux 1:fb4494783863 210 }
samux 1:fb4494783863 211
samux 1:fb4494783863 212 bool Wifly::connect(const char * host, int port)
samux 1:fb4494783863 213 {
samux 1:fb4494783863 214 char rcv[20];
samux 1:fb4494783863 215 char cmd[20];
samux 1:fb4494783863 216
samux 1:fb4494783863 217 // get ip from host and set host
samux 1:fb4494783863 218 if (gethostbyname(host, rcv)) {
samux 1:fb4494783863 219 sprintf(cmd, "set i h %s\r", rcv);
samux 1:fb4494783863 220 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 221 return false;
samux 1:fb4494783863 222 } else {
samux 1:fb4494783863 223 return false;
samux 1:fb4494783863 224 }
samux 1:fb4494783863 225
samux 1:fb4494783863 226 // set port
samux 1:fb4494783863 227 sprintf(cmd, "set i r %d\r", port);
samux 1:fb4494783863 228 if (!sendCommand(cmd, "AOK"))
samux 1:fb4494783863 229 return false;
samux 1:fb4494783863 230
samux 1:fb4494783863 231 // open
samux 1:fb4494783863 232 if (sendCommand("open\r", NULL, rcv)) {
samux 1:fb4494783863 233 if (strstr(rcv, "OPEN") == NULL) {
samux 1:fb4494783863 234 if (strstr(rcv, "Connected") != NULL) {
samux 1:fb4494783863 235 if (!sendCommand("close\r", "CLOS"))
samux 1:fb4494783863 236 return false;
samux 1:fb4494783863 237 if (!sendCommand("open\r", "OPEN"))
samux 1:fb4494783863 238 return false;
samux 1:fb4494783863 239 } else {
samux 1:fb4494783863 240 return false;
samux 1:fb4494783863 241 }
samux 1:fb4494783863 242 }
samux 1:fb4494783863 243 } else {
samux 1:fb4494783863 244 return false;
samux 1:fb4494783863 245 }
samux 1:fb4494783863 246
samux 1:fb4494783863 247 state.tcp = true;
samux 1:fb4494783863 248 state.cmd_mode = false;
samux 1:fb4494783863 249
samux 1:fb4494783863 250 return true;
samux 1:fb4494783863 251 }
samux 1:fb4494783863 252
samux 1:fb4494783863 253
samux 1:fb4494783863 254 bool Wifly::gethostbyname(const char * host, char * ip)
samux 1:fb4494783863 255 {
samux 1:fb4494783863 256 string h = host;
samux 1:fb4494783863 257 char cmd[30], rcv[100];
samux 1:fb4494783863 258 int l = 0;
samux 1:fb4494783863 259 char * point;
samux 1:fb4494783863 260 int nb_digits = 0;
samux 1:fb4494783863 261
samux 1:fb4494783863 262 // no dns needed
samux 1:fb4494783863 263 int pos = h.find(".");
samux 1:fb4494783863 264 if (pos != string::npos) {
samux 1:fb4494783863 265 string sub = h.substr(0, h.find("."));
samux 1:fb4494783863 266 nb_digits = atoi(sub.c_str());
samux 1:fb4494783863 267 }
samux 1:fb4494783863 268 //printf("substrL %s\r\n", sub.c_str());
samux 1:fb4494783863 269 if (count(h.begin(), h.end(), '.') == 3 && nb_digits > 0) {
samux 1:fb4494783863 270 strcpy(ip, host);
samux 1:fb4494783863 271 }
samux 1:fb4494783863 272 // dns needed
samux 1:fb4494783863 273 else {
samux 1:fb4494783863 274 nb_digits = 0;
samux 1:fb4494783863 275 sprintf(cmd, "lookup %s\r", host);
samux 1:fb4494783863 276 if (!sendCommand(cmd, NULL, rcv))
samux 1:fb4494783863 277 return false;
samux 1:fb4494783863 278
samux 1:fb4494783863 279 // look for the ip address
samux 1:fb4494783863 280 char * begin = strstr(rcv, "=") + 1;
samux 1:fb4494783863 281 for (int i = 0; i < 3; i++) {
samux 1:fb4494783863 282 point = strstr(begin + l, ".");
samux 1:fb4494783863 283 DBG("str: %s", begin + l);
samux 1:fb4494783863 284 l += point - (begin + l) + 1;
samux 1:fb4494783863 285 }
samux 1:fb4494783863 286 DBG("str: %s", begin + l);
samux 1:fb4494783863 287 while(*(begin + l + nb_digits) >= '0' && *(begin + l + nb_digits) <= '9') {
samux 1:fb4494783863 288 DBG("digit: %c", *(begin + l + nb_digits));
samux 1:fb4494783863 289 nb_digits++;
samux 1:fb4494783863 290 }
samux 1:fb4494783863 291 memcpy(ip, begin, l + nb_digits);
samux 1:fb4494783863 292 ip[l+nb_digits] = 0;
samux 1:fb4494783863 293 DBG("ip from dns: %s", ip);
samux 1:fb4494783863 294 }
samux 1:fb4494783863 295 return true;
samux 1:fb4494783863 296 }
samux 1:fb4494783863 297
samux 1:fb4494783863 298
samux 1:fb4494783863 299 void Wifly::flush()
samux 1:fb4494783863 300 {
samux 1:fb4494783863 301 buf_wifly.flush();
samux 1:fb4494783863 302 }
samux 1:fb4494783863 303
samux 1:fb4494783863 304 bool Wifly::sendCommand(const char * cmd, const char * ack, char * res, int timeout)
samux 1:fb4494783863 305 {
samux 1:fb4494783863 306 if (!state.cmd_mode) {
samux 1:fb4494783863 307 cmdMode();
samux 1:fb4494783863 308 }
samux 1:fb4494783863 309 if (send(cmd, strlen(cmd), ack, res, timeout) == -1) {
samux 1:fb4494783863 310 ERR("sendCommand: cannot %s\r\n", cmd);
samux 1:fb4494783863 311 exit();
samux 1:fb4494783863 312 return false;
samux 1:fb4494783863 313 }
samux 1:fb4494783863 314 return true;
samux 1:fb4494783863 315 }
samux 1:fb4494783863 316
samux 1:fb4494783863 317 bool Wifly::cmdMode()
samux 1:fb4494783863 318 {
samux 1:fb4494783863 319 // if already in cmd mode, return
samux 1:fb4494783863 320 if (state.cmd_mode)
samux 1:fb4494783863 321 return true;
samux 1:fb4494783863 322
lz307 7:3152fcc74390 323 if (send("$$$", 3, "CMD") == -1 && send("\r",1,">") != true) {
samux 1:fb4494783863 324 ERR("cannot enter in cmd mode\r\n");
samux 1:fb4494783863 325 return false;
samux 1:fb4494783863 326 }
samux 1:fb4494783863 327 state.cmd_mode = true;
samux 1:fb4494783863 328 return true;
samux 1:fb4494783863 329 }
samux 1:fb4494783863 330
samux 1:fb4494783863 331 bool Wifly::disconnect()
samux 1:fb4494783863 332 {
samux 1:fb4494783863 333 // if already disconnected, return
samux 1:fb4494783863 334 if (!state.associated)
samux 1:fb4494783863 335 return true;
samux 1:fb4494783863 336
samux 1:fb4494783863 337 if (!sendCommand("leave\r", "DeAuth"))
samux 1:fb4494783863 338 return false;
samux 1:fb4494783863 339 exit();
samux 1:fb4494783863 340
samux 1:fb4494783863 341 state.associated = false;
samux 1:fb4494783863 342 return true;
samux 1:fb4494783863 343
samux 1:fb4494783863 344 }
samux 1:fb4494783863 345
samux 1:fb4494783863 346 bool Wifly::is_connected()
samux 1:fb4494783863 347 {
samux 1:fb4494783863 348 return (tcp_status.read() == 1) ? true : false;
samux 1:fb4494783863 349 }
samux 1:fb4494783863 350
samux 1:fb4494783863 351
samux 1:fb4494783863 352 void Wifly::reset()
samux 1:fb4494783863 353 {
samux 1:fb4494783863 354 reset_pin = 0;
samux 1:fb4494783863 355 wait(0.2);
samux 1:fb4494783863 356 reset_pin = 1;
samux 1:fb4494783863 357 wait(0.2);
samux 1:fb4494783863 358 }
samux 1:fb4494783863 359
samux 1:fb4494783863 360 bool Wifly::close()
samux 1:fb4494783863 361 {
samux 1:fb4494783863 362 // if not connected, return
samux 1:fb4494783863 363 if (!state.tcp)
samux 1:fb4494783863 364 return true;
samux 1:fb4494783863 365
samux 1:fb4494783863 366 wait(0.25);
samux 1:fb4494783863 367 if (!sendCommand("close\r", "CLOS"))
samux 1:fb4494783863 368 return false;
samux 1:fb4494783863 369 exit();
samux 1:fb4494783863 370
samux 1:fb4494783863 371 state.tcp = false;
samux 1:fb4494783863 372 return true;
samux 1:fb4494783863 373 }
samux 1:fb4494783863 374
samux 1:fb4494783863 375
samux 1:fb4494783863 376 int Wifly::putc(char c)
samux 1:fb4494783863 377 {
samux 1:fb4494783863 378 while (!wifi.writeable());
samux 1:fb4494783863 379 return wifi.putc(c);
samux 1:fb4494783863 380 }
samux 1:fb4494783863 381
samux 1:fb4494783863 382
samux 1:fb4494783863 383 bool Wifly::exit()
samux 1:fb4494783863 384 {
samux 1:fb4494783863 385 flush();
samux 1:fb4494783863 386 if (!state.cmd_mode)
samux 1:fb4494783863 387 return true;
samux 1:fb4494783863 388 if (!sendCommand("exit\r", "EXIT"))
samux 1:fb4494783863 389 return false;
samux 1:fb4494783863 390 state.cmd_mode = false;
samux 1:fb4494783863 391 flush();
samux 1:fb4494783863 392 return true;
samux 1:fb4494783863 393 }
samux 1:fb4494783863 394
samux 1:fb4494783863 395
samux 1:fb4494783863 396 int Wifly::readable()
samux 1:fb4494783863 397 {
samux 1:fb4494783863 398 return buf_wifly.available();
samux 1:fb4494783863 399 }
samux 1:fb4494783863 400
samux 1:fb4494783863 401 int Wifly::writeable()
samux 1:fb4494783863 402 {
samux 1:fb4494783863 403 return wifi.writeable();
samux 1:fb4494783863 404 }
samux 1:fb4494783863 405
samux 1:fb4494783863 406 char Wifly::getc()
samux 1:fb4494783863 407 {
samux 1:fb4494783863 408 char c;
samux 1:fb4494783863 409 while (!buf_wifly.available());
samux 1:fb4494783863 410 buf_wifly.dequeue(&c);
samux 1:fb4494783863 411 return c;
samux 1:fb4494783863 412 }
samux 1:fb4494783863 413
samux 1:fb4494783863 414 void Wifly::handler_rx(void)
samux 1:fb4494783863 415 {
samux 1:fb4494783863 416 //read characters
samux 1:fb4494783863 417 while (wifi.readable())
samux 1:fb4494783863 418 buf_wifly.queue(wifi.getc());
samux 1:fb4494783863 419 }
samux 1:fb4494783863 420
samux 1:fb4494783863 421 void Wifly::attach_rx(bool callback)
samux 1:fb4494783863 422 {
samux 1:fb4494783863 423 if (!callback)
samux 1:fb4494783863 424 wifi.attach(NULL);
samux 1:fb4494783863 425 else
samux 1:fb4494783863 426 wifi.attach(this, &Wifly::handler_rx);
samux 1:fb4494783863 427 }
samux 1:fb4494783863 428
samux 1:fb4494783863 429
samux 1:fb4494783863 430 int Wifly::send(const char * str, int len, const char * ACK, char * res, int timeout)
samux 1:fb4494783863 431 {
samux 1:fb4494783863 432 char read;
samux 1:fb4494783863 433 size_t found = string::npos;
samux 1:fb4494783863 434 string checking;
samux 1:fb4494783863 435 Timer tmr;
samux 1:fb4494783863 436 int result = 0;
samux 1:fb4494783863 437
samux 1:fb4494783863 438 DBG("will send: %s\r\n",str);
samux 1:fb4494783863 439
samux 1:fb4494783863 440 attach_rx(false);
samux 1:fb4494783863 441
samux 1:fb4494783863 442 //We flush the buffer
samux 1:fb4494783863 443 while (wifi.readable())
samux 1:fb4494783863 444 wifi.getc();
samux 1:fb4494783863 445
samux 1:fb4494783863 446 if (!ACK || !strcmp(ACK, "NO")) {
samux 1:fb4494783863 447 for (int i = 0; i < len; i++)
samux 1:fb4494783863 448 result = (putc(str[i]) == str[i]) ? result + 1 : result;
samux 1:fb4494783863 449 } else {
samux 1:fb4494783863 450 //We flush the buffer
samux 1:fb4494783863 451 while (wifi.readable())
samux 1:fb4494783863 452 wifi.getc();
samux 1:fb4494783863 453
samux 1:fb4494783863 454 tmr.start();
samux 1:fb4494783863 455 for (int i = 0; i < len; i++)
samux 1:fb4494783863 456 result = (putc(str[i]) == str[i]) ? result + 1 : result;
samux 1:fb4494783863 457
samux 1:fb4494783863 458 while (1) {
samux 1:fb4494783863 459 if (tmr.read_ms() > timeout) {
samux 1:fb4494783863 460 //We flush the buffer
samux 1:fb4494783863 461 while (wifi.readable())
samux 1:fb4494783863 462 wifi.getc();
samux 1:fb4494783863 463
samux 1:fb4494783863 464 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 465
samux 1:fb4494783863 466 attach_rx(true);
samux 1:fb4494783863 467 return -1;
samux 1:fb4494783863 468 } else if (wifi.readable()) {
samux 1:fb4494783863 469 read = wifi.getc();
samux 1:fb4494783863 470 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 471 checking += read;
samux 1:fb4494783863 472 found = checking.find(ACK);
samux 1:fb4494783863 473 if (found != string::npos) {
samux 1:fb4494783863 474 wait(0.01);
samux 1:fb4494783863 475
samux 1:fb4494783863 476 //We flush the buffer
samux 1:fb4494783863 477 while (wifi.readable())
samux 1:fb4494783863 478 wifi.getc();
samux 1:fb4494783863 479
samux 1:fb4494783863 480 break;
samux 1:fb4494783863 481 }
samux 1:fb4494783863 482 }
samux 1:fb4494783863 483 }
samux 1:fb4494783863 484 }
samux 1:fb4494783863 485 DBG("check: %s\r\n", checking.c_str());
samux 1:fb4494783863 486
samux 1:fb4494783863 487 attach_rx(true);
samux 1:fb4494783863 488 return result;
samux 1:fb4494783863 489 }
samux 1:fb4494783863 490
samux 1:fb4494783863 491 //the user wants the result from the command (ACK == NULL, res != NULL)
samux 1:fb4494783863 492 if ( res != NULL) {
samux 1:fb4494783863 493 int i = 0;
samux 1:fb4494783863 494 Timer timeout;
samux 1:fb4494783863 495 timeout.start();
samux 1:fb4494783863 496 tmr.reset();
samux 1:fb4494783863 497 while (1) {
samux 1:fb4494783863 498 if (timeout.read() > 2) {
samux 1:fb4494783863 499 if (i == 0) {
samux 1:fb4494783863 500 res = NULL;
samux 1:fb4494783863 501 break;
samux 1:fb4494783863 502 }
samux 1:fb4494783863 503 res[i] = '\0';
samux 1:fb4494783863 504 DBG("user str 1: %s\r\n", res);
samux 1:fb4494783863 505
samux 1:fb4494783863 506 break;
samux 1:fb4494783863 507 } else {
samux 1:fb4494783863 508 if (tmr.read_ms() > 300) {
samux 1:fb4494783863 509 res[i] = '\0';
samux 1:fb4494783863 510 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 511
samux 1:fb4494783863 512 break;
samux 1:fb4494783863 513 }
samux 1:fb4494783863 514 if (wifi.readable()) {
samux 1:fb4494783863 515 tmr.start();
samux 1:fb4494783863 516 read = wifi.getc();
samux 1:fb4494783863 517
samux 1:fb4494783863 518 // we drop \r and \n
samux 1:fb4494783863 519 if ( read != '\r' && read != '\n') {
samux 1:fb4494783863 520 res[i++] = read;
samux 1:fb4494783863 521 }
samux 1:fb4494783863 522 }
samux 1:fb4494783863 523 }
samux 1:fb4494783863 524 }
samux 1:fb4494783863 525 DBG("user str: %s\r\n", res);
samux 1:fb4494783863 526 }
samux 1:fb4494783863 527
samux 1:fb4494783863 528 //We flush the buffer
samux 1:fb4494783863 529 while (wifi.readable())
samux 1:fb4494783863 530 wifi.getc();
samux 1:fb4494783863 531
samux 1:fb4494783863 532 attach_rx(true);
samux 1:fb4494783863 533 DBG("result: %d\r\n", result)
samux 1:fb4494783863 534 return result;
samux 1:fb4494783863 535 }