mbed official / SprintUSBModem

USB Host Library for Sprint Dongles

Dependencies:   Socket USBHostWANDongleSprint lwip-sys lwip

Dependents:   SprintUSBModemWebsocketTest SprintUSBModemHTTPClientTest SprintUSBModemNTPClientTest SprintUSBModemSMSTest ... more

Fork of SprintUSBModem_bleedingedge by Donatien Garnier

at/ATCommandsInterface.cpp@0:8f57713b2147, 2012-09-12 (annotated)

Committer:
donatien
Date:
Wed Sep 12 09:34:21 2012 +0000
Revision:
0:8f57713b2147
Child:
4:23100b0757d6
Initial Commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:8f57713b2147 1 /* ATCommandsInterface.cpp */
donatien 0:8f57713b2147 2 /* Copyright (C) 2012 mbed.org, MIT License
donatien 0:8f57713b2147 3 *
donatien 0:8f57713b2147 4 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
donatien 0:8f57713b2147 5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
donatien 0:8f57713b2147 6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
donatien 0:8f57713b2147 7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
donatien 0:8f57713b2147 8 * furnished to do so, subject to the following conditions:
donatien 0:8f57713b2147 9 *
donatien 0:8f57713b2147 10 * The above copyright notice and this permission notice shall be included in all copies or
donatien 0:8f57713b2147 11 * substantial portions of the Software.
donatien 0:8f57713b2147 12 *
donatien 0:8f57713b2147 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
donatien 0:8f57713b2147 14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
donatien 0:8f57713b2147 15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
donatien 0:8f57713b2147 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
donatien 0:8f57713b2147 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
donatien 0:8f57713b2147 18 */
donatien 0:8f57713b2147 19
donatien 0:8f57713b2147 20 #define __DEBUG__ 2//ERR+WARN
donatien 0:8f57713b2147 21 #ifndef __MODULE__
donatien 0:8f57713b2147 22 #define __MODULE__ "ATCommandsInterface.cpp"
donatien 0:8f57713b2147 23 #endif
donatien 0:8f57713b2147 24
donatien 0:8f57713b2147 25 #include "core/fwk.h"
donatien 0:8f57713b2147 26
donatien 0:8f57713b2147 27 #include <cstdio>
donatien 0:8f57713b2147 28 //#include <cstring> //For memset, strstr...
donatien 0:8f57713b2147 29
donatien 0:8f57713b2147 30 using std::memmove;
donatien 0:8f57713b2147 31
donatien 0:8f57713b2147 32 #include "ATCommandsInterface.h"
donatien 0:8f57713b2147 33
donatien 0:8f57713b2147 34 ATCommandsInterface::ATCommandsInterface(IOStream* pStream) :
donatien 0:8f57713b2147 35 m_pStream(pStream), m_open(false), m_env2AT(), m_AT2Env(), m_processingMtx(),
donatien 0:8f57713b2147 36 m_processingThread(&ATCommandsInterface::staticCallback, this, (osPriority)AT_THREAD_PRIORITY, 4*192),
donatien 0:8f57713b2147 37 m_eventsMtx()
donatien 0:8f57713b2147 38 {
donatien 0:8f57713b2147 39 memset(m_eventsHandlers, 0, MAX_AT_EVENTS_HANDLERS * sizeof(IATEventsHandler*));
donatien 0:8f57713b2147 40
donatien 0:8f57713b2147 41 m_processingMtx.lock();
donatien 0:8f57713b2147 42 }
donatien 0:8f57713b2147 43
donatien 0:8f57713b2147 44 //Open connection to AT Interface in order to execute command & register/unregister events
donatien 0:8f57713b2147 45 int ATCommandsInterface::open()
donatien 0:8f57713b2147 46 {
donatien 0:8f57713b2147 47 if( m_open )
donatien 0:8f57713b2147 48 {
donatien 0:8f57713b2147 49 WARN("AT interface is already open");
donatien 0:8f57713b2147 50 return OK;
donatien 0:8f57713b2147 51 }
donatien 0:8f57713b2147 52 DBG("Opening AT interface");
donatien 0:8f57713b2147 53 //Start processing
donatien 0:8f57713b2147 54 m_processingThread.signal_set(AT_SIG_PROCESSING_START);
donatien 0:8f57713b2147 55
donatien 0:8f57713b2147 56 m_processingMtx.unlock();
donatien 0:8f57713b2147 57
donatien 0:8f57713b2147 58 m_open = true;
donatien 0:8f57713b2147 59
donatien 0:8f57713b2147 60 //Advertize this to events handlers
donatien 0:8f57713b2147 61 m_eventsMtx.lock();
donatien 0:8f57713b2147 62 for(int i = 0; i < MAX_AT_EVENTS_HANDLERS; i++) //Find a free slot
donatien 0:8f57713b2147 63 {
donatien 0:8f57713b2147 64 if( m_eventsHandlers[i] != NULL )
donatien 0:8f57713b2147 65 {
donatien 0:8f57713b2147 66 m_eventsHandlers[i]->onDispatchStart();
donatien 0:8f57713b2147 67 }
donatien 0:8f57713b2147 68 }
donatien 0:8f57713b2147 69 m_eventsMtx.unlock();
donatien 0:8f57713b2147 70
donatien 0:8f57713b2147 71 DBG("AT interface opened");
donatien 0:8f57713b2147 72
donatien 0:8f57713b2147 73 return OK;
donatien 0:8f57713b2147 74 }
donatien 0:8f57713b2147 75
donatien 0:8f57713b2147 76 //Initialize AT link
donatien 0:8f57713b2147 77 int ATCommandsInterface::init()
donatien 0:8f57713b2147 78 {
donatien 0:8f57713b2147 79 DBG("Sending ATZ E1 V1");
donatien 0:8f57713b2147 80 //Should we flush m_pStream at this point ???
donatien 0:8f57713b2147 81 int err;
donatien 0:8f57713b2147 82 int tries = 5;
donatien 0:8f57713b2147 83 do
donatien 0:8f57713b2147 84 {
donatien 0:8f57713b2147 85 err = executeSimple("ATZ E1 V1", NULL, 3000); //Enable echo and verbosity
donatien 0:8f57713b2147 86 if(err && tries)
donatien 0:8f57713b2147 87 {
donatien 0:8f57713b2147 88 WARN("No response, trying again");
donatien 0:8f57713b2147 89 Thread::wait(1000); //Give dongle time to recover
donatien 0:8f57713b2147 90 }
donatien 0:8f57713b2147 91 } while(err && tries--);
donatien 0:8f57713b2147 92 if( err )
donatien 0:8f57713b2147 93 {
donatien 0:8f57713b2147 94 ERR("Sending ATZ E1 V1 returned with err code %d", err);
donatien 0:8f57713b2147 95 return err;
donatien 0:8f57713b2147 96 }
donatien 0:8f57713b2147 97
donatien 0:8f57713b2147 98 DBG("AT interface initialized");
donatien 0:8f57713b2147 99
donatien 0:8f57713b2147 100 return OK;
donatien 0:8f57713b2147 101 }
donatien 0:8f57713b2147 102
donatien 0:8f57713b2147 103 //Close connection
donatien 0:8f57713b2147 104 int ATCommandsInterface::close()
donatien 0:8f57713b2147 105 {
donatien 0:8f57713b2147 106 if( !m_open )
donatien 0:8f57713b2147 107 {
donatien 0:8f57713b2147 108 WARN("AT interface is already closed");
donatien 0:8f57713b2147 109 return OK;
donatien 0:8f57713b2147 110 }
donatien 0:8f57713b2147 111
donatien 0:8f57713b2147 112 DBG("Closing AT interface");
donatien 0:8f57713b2147 113
donatien 0:8f57713b2147 114 //Stop processing
donatien 0:8f57713b2147 115 m_processingThread.signal_set(AT_SIG_PROCESSING_STOP);
donatien 0:8f57713b2147 116 //m_stopSphre.release();
donatien 0:8f57713b2147 117
donatien 0:8f57713b2147 118 int* msg = m_env2AT.alloc(osWaitForever);
donatien 0:8f57713b2147 119 *msg = AT_STOP;
donatien 0:8f57713b2147 120 m_env2AT.put(msg); //Used to unstall the process if needed
donatien 0:8f57713b2147 121
donatien 0:8f57713b2147 122 //Unlock process routine (abort read)
donatien 0:8f57713b2147 123 m_pStream->abortRead(); //This is thread-safe
donatien 0:8f57713b2147 124 m_processingMtx.lock();
donatien 0:8f57713b2147 125 m_open = false;
donatien 0:8f57713b2147 126
donatien 0:8f57713b2147 127 //Advertize this to events handlers
donatien 0:8f57713b2147 128 m_eventsMtx.lock();
donatien 0:8f57713b2147 129 for(int i = 0; i < MAX_AT_EVENTS_HANDLERS; i++) //Find a free slot
donatien 0:8f57713b2147 130 {
donatien 0:8f57713b2147 131 if( m_eventsHandlers[i] != NULL )
donatien 0:8f57713b2147 132 {
donatien 0:8f57713b2147 133 m_eventsHandlers[i]->onDispatchStop();
donatien 0:8f57713b2147 134 }
donatien 0:8f57713b2147 135 }
donatien 0:8f57713b2147 136 m_eventsMtx.unlock();
donatien 0:8f57713b2147 137
donatien 0:8f57713b2147 138 DBG("AT interface closed");
donatien 0:8f57713b2147 139 return OK;
donatien 0:8f57713b2147 140 }
donatien 0:8f57713b2147 141
donatien 0:8f57713b2147 142 bool ATCommandsInterface::isOpen()
donatien 0:8f57713b2147 143 {
donatien 0:8f57713b2147 144 return m_open;
donatien 0:8f57713b2147 145 }
donatien 0:8f57713b2147 146
donatien 0:8f57713b2147 147 int ATCommandsInterface::executeSimple(const char* command, ATResult* pResult, uint32_t timeout/*=1000*/)
donatien 0:8f57713b2147 148 {
donatien 0:8f57713b2147 149 return execute(command, this, pResult, timeout);
donatien 0:8f57713b2147 150 }
donatien 0:8f57713b2147 151
donatien 0:8f57713b2147 152 int ATCommandsInterface::execute(const char* command, IATCommandsProcessor* pProcessor, ATResult* pResult, uint32_t timeout/*=1000*/)
donatien 0:8f57713b2147 153 {
donatien 0:8f57713b2147 154 DBG("Executing command %s", command);
donatien 0:8f57713b2147 155 if(!m_open)
donatien 0:8f57713b2147 156 {
donatien 0:8f57713b2147 157 WARN("Interface is not open!");
donatien 0:8f57713b2147 158 return NET_INVALID;
donatien 0:8f57713b2147 159 }
donatien 0:8f57713b2147 160
donatien 0:8f57713b2147 161 //Lock transaction mutex
donatien 0:8f57713b2147 162 m_transactionMtx.lock();
donatien 0:8f57713b2147 163
donatien 0:8f57713b2147 164 //Discard previous result if it arrived too late
donatien 0:8f57713b2147 165 osEvent evt = m_AT2Env.get(0);
donatien 0:8f57713b2147 166
donatien 0:8f57713b2147 167 if(evt.status == osEventMail)
donatien 0:8f57713b2147 168 {
donatien 0:8f57713b2147 169 m_AT2Env.free((int*)evt.value.p);
donatien 0:8f57713b2147 170 WARN("Previous result discarded");
donatien 0:8f57713b2147 171 }
donatien 0:8f57713b2147 172
donatien 0:8f57713b2147 173 //Send params to the process routine
donatien 0:8f57713b2147 174 m_transactionCommand = command;
donatien 0:8f57713b2147 175 if(pProcessor != NULL)
donatien 0:8f57713b2147 176 {
donatien 0:8f57713b2147 177 m_pTransactionProcessor = pProcessor;
donatien 0:8f57713b2147 178 }
donatien 0:8f57713b2147 179 else
donatien 0:8f57713b2147 180 {
donatien 0:8f57713b2147 181 m_pTransactionProcessor = this; //Use default behaviour
donatien 0:8f57713b2147 182 }
donatien 0:8f57713b2147 183
donatien 0:8f57713b2147 184 Thread::wait(100); //FIXME find stg else
donatien 0:8f57713b2147 185
donatien 0:8f57713b2147 186 DBG("Sending command ready signal to AT thread & aborting current blocking read operation");
donatien 0:8f57713b2147 187
donatien 0:8f57713b2147 188 //Produce command ready signal
donatien 0:8f57713b2147 189 int* msg = m_env2AT.alloc(osWaitForever);
donatien 0:8f57713b2147 190 *msg = AT_CMD_READY;
donatien 0:8f57713b2147 191 m_env2AT.put(msg);
donatien 0:8f57713b2147 192
donatien 0:8f57713b2147 193 DBG("Trying to enter abortRead()");
donatien 0:8f57713b2147 194 //Unlock process routine (abort read)
donatien 0:8f57713b2147 195 m_pStream->abortRead(); //This is thread-safe
donatien 0:8f57713b2147 196
donatien 0:8f57713b2147 197 //Wait for a result (get result message)
donatien 0:8f57713b2147 198 evt = m_AT2Env.get(timeout);
donatien 0:8f57713b2147 199
donatien 0:8f57713b2147 200 if(evt.status != osEventMail)
donatien 0:8f57713b2147 201 {
donatien 0:8f57713b2147 202 //Cancel request
donatien 0:8f57713b2147 203 msg = m_env2AT.alloc(osWaitForever);
donatien 0:8f57713b2147 204 *msg = AT_TIMEOUT;
donatien 0:8f57713b2147 205 m_env2AT.put(msg);
donatien 0:8f57713b2147 206
donatien 0:8f57713b2147 207 DBG("Trying to enter abortRead()");
donatien 0:8f57713b2147 208 //Unlock process routine (abort read)
donatien 0:8f57713b2147 209 m_pStream->abortRead(); //This is thread-safe
donatien 0:8f57713b2147 210
donatien 0:8f57713b2147 211 WARN("Command returned no message");
donatien 0:8f57713b2147 212 m_transactionMtx.unlock();
donatien 0:8f57713b2147 213 return NET_TIMEOUT;
donatien 0:8f57713b2147 214 }
donatien 0:8f57713b2147 215 DBG("Command returned with message %d", *msg);
donatien 0:8f57713b2147 216
donatien 0:8f57713b2147 217 m_AT2Env.free((int*)evt.value.p);
donatien 0:8f57713b2147 218
donatien 0:8f57713b2147 219 if(pResult != NULL)
donatien 0:8f57713b2147 220 {
donatien 0:8f57713b2147 221 *pResult = m_transactionResult;
donatien 0:8f57713b2147 222 }
donatien 0:8f57713b2147 223
donatien 0:8f57713b2147 224 int ret = ATResultToReturnCode(m_transactionResult);
donatien 0:8f57713b2147 225 if(ret != OK)
donatien 0:8f57713b2147 226 {
donatien 0:8f57713b2147 227 WARN("Command returned AT result %d with code %d", m_transactionResult.result, m_transactionResult.code);
donatien 0:8f57713b2147 228 }
donatien 0:8f57713b2147 229
donatien 0:8f57713b2147 230 DBG("Command returned successfully");
donatien 0:8f57713b2147 231
donatien 0:8f57713b2147 232 //Unlock transaction mutex
donatien 0:8f57713b2147 233 m_transactionMtx.unlock();
donatien 0:8f57713b2147 234
donatien 0:8f57713b2147 235 return ret;
donatien 0:8f57713b2147 236 }
donatien 0:8f57713b2147 237
donatien 0:8f57713b2147 238 int ATCommandsInterface::registerEventsHandler(IATEventsHandler* pHdlr)
donatien 0:8f57713b2147 239 {
donatien 0:8f57713b2147 240 m_eventsMtx.lock();
donatien 0:8f57713b2147 241 for(int i = 0; i < MAX_AT_EVENTS_HANDLERS; i++) //Find a free slot
donatien 0:8f57713b2147 242 {
donatien 0:8f57713b2147 243 if( m_eventsHandlers[i] == NULL )
donatien 0:8f57713b2147 244 {
donatien 0:8f57713b2147 245 m_eventsHandlers[i] = pHdlr;
donatien 0:8f57713b2147 246 m_eventsMtx.unlock();
donatien 0:8f57713b2147 247 return OK;
donatien 0:8f57713b2147 248 }
donatien 0:8f57713b2147 249 }
donatien 0:8f57713b2147 250 m_eventsMtx.unlock();
donatien 0:8f57713b2147 251 return NET_OOM; //No room left
donatien 0:8f57713b2147 252 }
donatien 0:8f57713b2147 253
donatien 0:8f57713b2147 254 int ATCommandsInterface::deregisterEventsHandler(IATEventsHandler* pHdlr)
donatien 0:8f57713b2147 255 {
donatien 0:8f57713b2147 256 m_eventsMtx.lock();
donatien 0:8f57713b2147 257 for(int i = 0; i < MAX_AT_EVENTS_HANDLERS; i++) //Find handler in list
donatien 0:8f57713b2147 258 {
donatien 0:8f57713b2147 259 if( m_eventsHandlers[i] == pHdlr )
donatien 0:8f57713b2147 260 {
donatien 0:8f57713b2147 261 m_eventsHandlers[i] = NULL;
donatien 0:8f57713b2147 262 m_eventsMtx.unlock();
donatien 0:8f57713b2147 263 return OK;
donatien 0:8f57713b2147 264 }
donatien 0:8f57713b2147 265 }
donatien 0:8f57713b2147 266 m_eventsMtx.unlock();
donatien 0:8f57713b2147 267 return NET_NOTFOUND; //Not found
donatien 0:8f57713b2147 268 }
donatien 0:8f57713b2147 269
donatien 0:8f57713b2147 270
donatien 0:8f57713b2147 271 int ATCommandsInterface::tryReadLine()
donatien 0:8f57713b2147 272 {
donatien 0:8f57713b2147 273 static bool lineDetected = false;
donatien 0:8f57713b2147 274
donatien 0:8f57713b2147 275 //Block on serial read or incoming command
donatien 0:8f57713b2147 276 DBG("Trying to read a new line from stream");
donatien 0:8f57713b2147 277 int ret = m_pStream->waitAvailable(); //This can be aborted
donatien 0:8f57713b2147 278 size_t readLen = 0;
donatien 0:8f57713b2147 279 if(ret == OK)
donatien 0:8f57713b2147 280 {
donatien 0:8f57713b2147 281 ret = m_pStream->read((uint8_t*)m_inputBuf + m_inputPos, &readLen, AT_INPUT_BUF_SIZE - 1 - m_inputPos, 0); //Do NOT wait at this point
donatien 0:8f57713b2147 282 }
donatien 0:8f57713b2147 283 if(ret == OK)
donatien 0:8f57713b2147 284 {
donatien 0:8f57713b2147 285 m_inputPos+=readLen;
donatien 0:8f57713b2147 286 m_inputBuf[m_inputPos] = '\0'; //Add null terminating character to ease the use of str* functions
donatien 0:8f57713b2147 287 DBG("In buffer: [%s]", m_inputBuf);
donatien 0:8f57713b2147 288 }
donatien 0:8f57713b2147 289
donatien 0:8f57713b2147 290 if( ret == NET_INTERRUPTED ) //It is worth checking readLen as data might have been read even though the read was interrupted
donatien 0:8f57713b2147 291 {
donatien 0:8f57713b2147 292 DBG("Read was interrupted");
donatien 0:8f57713b2147 293 return NET_INTERRUPTED; //0 chars were read
donatien 0:8f57713b2147 294 }
donatien 0:8f57713b2147 295 else if(readLen == 0)
donatien 0:8f57713b2147 296 {
donatien 0:8f57713b2147 297 DBG("Nothing read");
donatien 0:8f57713b2147 298 return OK; //0 chars were read
donatien 0:8f57713b2147 299 }
donatien 0:8f57713b2147 300
donatien 0:8f57713b2147 301 DBG("Trying to process incoming line");
donatien 0:8f57713b2147 302 bool lineProcessed = false;
donatien 0:8f57713b2147 303
donatien 0:8f57713b2147 304 do
donatien 0:8f57713b2147 305 {
donatien 0:8f57713b2147 306 lineProcessed = false; //Reset flag
donatien 0:8f57713b2147 307
donatien 0:8f57713b2147 308 DBG("New iteration");
donatien 0:8f57713b2147 309
donatien 0:8f57713b2147 310 //Look for a new line
donatien 0:8f57713b2147 311 if(!lineDetected)
donatien 0:8f57713b2147 312 {
donatien 0:8f57713b2147 313 DBG("No line detected yet");
donatien 0:8f57713b2147 314 //Try to look for a starting CRLF
donatien 0:8f57713b2147 315 char* crPtr = strchr(m_inputBuf, CR);
donatien 0:8f57713b2147 316 /*
donatien 0:8f57713b2147 317 Different cases at this point:
donatien 0:8f57713b2147 318 - CRLF%c sequence: this is the start of a line
donatien 0:8f57713b2147 319 - CRLFCR(LF) sequence: this is the end of a line (followed by the beginning of the next one)
donatien 0:8f57713b2147 320 - LF: this is the trailing LF char of the previous line, discard
donatien 0:8f57713b2147 321 - CR / CRLF incomplete sequence: more data is needed to determine which action to take
donatien 0:8f57713b2147 322 - %c ... CR sequence: this should be the echo of the previous sequence
donatien 0:8f57713b2147 323 - %c sequence: This might be the echo of the previous command; more data is needed to determine which action to take
donatien 0:8f57713b2147 324
donatien 0:8f57713b2147 325 In every case, move mem at the beginning
donatien 0:8f57713b2147 326 */
donatien 0:8f57713b2147 327 if(crPtr != NULL)
donatien 0:8f57713b2147 328 {
donatien 0:8f57713b2147 329 DBG("CR char found");
donatien 0:8f57713b2147 330
donatien 0:8f57713b2147 331 #if 0
donatien 0:8f57713b2147 332 //Discard all preceding characters (can do nothing if m_inputBuf == crPtr)
donatien 0:8f57713b2147 333 memmove(m_inputBuf, crPtr, (m_inputPos + 1) - (crPtr-m_inputBuf)); //Move null-terminating char as well
donatien 0:8f57713b2147 334 m_inputPos = m_inputPos - (crPtr-m_inputBuf); //Adjust m_inputPos
donatien 0:8f57713b2147 335 #endif
donatien 0:8f57713b2147 336
donatien 0:8f57713b2147 337 //If the line starts with CR, this should be a result code
donatien 0:8f57713b2147 338 if( crPtr == m_inputBuf )
donatien 0:8f57713b2147 339 {
donatien 0:8f57713b2147 340 //To determine the sequence we need at least 3 chars
donatien 0:8f57713b2147 341 if(m_inputPos >= 3)
donatien 0:8f57713b2147 342 {
donatien 0:8f57713b2147 343 //Look for a LF char next to the CR char
donatien 0:8f57713b2147 344 if(m_inputBuf[1] == LF)
donatien 0:8f57713b2147 345 {
donatien 0:8f57713b2147 346 //At this point we can check whether this is the end of a preceding line or the beginning of a new one
donatien 0:8f57713b2147 347 if(m_inputBuf[2] != CR)
donatien 0:8f57713b2147 348 {
donatien 0:8f57713b2147 349 DBG("Beginning of new line found");
donatien 0:8f57713b2147 350 //Beginning of a line
donatien 0:8f57713b2147 351 lineDetected = true; //Move to next state-machine step
donatien 0:8f57713b2147 352 }
donatien 0:8f57713b2147 353 else
donatien 0:8f57713b2147 354 {
donatien 0:8f57713b2147 355 //End of an unprocessed line
donatien 0:8f57713b2147 356 WARN("End of unprocessed line");
donatien 0:8f57713b2147 357 }
donatien 0:8f57713b2147 358 //In both cases discard CRLF
donatien 0:8f57713b2147 359 DBG("Discarding CRLF");
donatien 0:8f57713b2147 360 memmove(m_inputBuf, m_inputBuf + 2, (m_inputPos + 1) - 2); //Move null-terminating char as well
donatien 0:8f57713b2147 361 m_inputPos = m_inputPos - 2; //Adjust m_inputPos
donatien 0:8f57713b2147 362 }
donatien 0:8f57713b2147 363 else
donatien 0:8f57713b2147 364 {
donatien 0:8f57713b2147 365 //This is completely unexpected, discard the CR char to try to recover good state
donatien 0:8f57713b2147 366 WARN("Unexpected %c char (%02d code) found after CR char", m_inputBuf[1]);
donatien 0:8f57713b2147 367 memmove(m_inputBuf, m_inputBuf + 1, (m_inputPos + 1) - 1); //Move null-terminating char as well
donatien 0:8f57713b2147 368 m_inputPos = m_inputPos - 1; //Adjust m_inputPos
donatien 0:8f57713b2147 369 }
donatien 0:8f57713b2147 370 }
donatien 0:8f57713b2147 371 }
donatien 0:8f57713b2147 372 //if the line does NOT begin with CR, this can be an echo of the previous command, process it
donatien 0:8f57713b2147 373 else
donatien 0:8f57713b2147 374 {
donatien 0:8f57713b2147 375 int crPos = crPtr - m_inputBuf;
donatien 0:8f57713b2147 376 int lfOff = 0; //Offset for LF if present
donatien 0:8f57713b2147 377 DBG("New line found (possible echo of command)");
donatien 0:8f57713b2147 378 //This is the end of line
donatien 0:8f57713b2147 379 //Replace m_inputBuf[crPos] with null-terminating char
donatien 0:8f57713b2147 380 m_inputBuf[crPos] = '\0';
donatien 0:8f57713b2147 381 //Check if there is a LF char afterwards
donatien 0:8f57713b2147 382 if(m_inputPos - crPos >= 1)
donatien 0:8f57713b2147 383 {
donatien 0:8f57713b2147 384 if(m_inputBuf[crPos+1] == LF)
donatien 0:8f57713b2147 385 {
donatien 0:8f57713b2147 386 lfOff++; //We will discard LF char as well
donatien 0:8f57713b2147 387 }
donatien 0:8f57713b2147 388 }
donatien 0:8f57713b2147 389 //Process line
donatien 0:8f57713b2147 390 processReadLine();
donatien 0:8f57713b2147 391 //Shift remaining data to beginning of buffer
donatien 0:8f57713b2147 392 memmove(m_inputBuf, m_inputBuf + crPos + lfOff + 1, (m_inputPos + 1) - (crPos + lfOff + 1)); //Move null-terminating char as well
donatien 0:8f57713b2147 393 m_inputPos = m_inputPos - (crPos + lfOff + 1); //Adjust m_inputPos
donatien 0:8f57713b2147 394 DBG("One line was successfully processed");
donatien 0:8f57713b2147 395 lineProcessed = true; //Line was processed with success
donatien 0:8f57713b2147 396 lineDetected = false; //Search now for a new line
donatien 0:8f57713b2147 397 }
donatien 0:8f57713b2147 398 }
donatien 0:8f57713b2147 399 else if(m_inputBuf[0] == LF) //If there is a remaining LF char from the previous line, discard it
donatien 0:8f57713b2147 400 {
donatien 0:8f57713b2147 401 DBG("Discarding single LF char");
donatien 0:8f57713b2147 402 memmove(m_inputBuf, m_inputBuf + 1, (m_inputPos + 1) - 1); //Move null-terminating char as well
donatien 0:8f57713b2147 403 m_inputPos = m_inputPos - 1; //Adjust m_inputPos
donatien 0:8f57713b2147 404 }
donatien 0:8f57713b2147 405 }
donatien 0:8f57713b2147 406
donatien 0:8f57713b2147 407 //Look for the end of line
donatien 0:8f57713b2147 408 if(lineDetected)
donatien 0:8f57713b2147 409 {
donatien 0:8f57713b2147 410 DBG("Looking for end of line");
donatien 0:8f57713b2147 411 //Try to look for a terminating CRLF
donatien 0:8f57713b2147 412 char* crPtr = strchr(m_inputBuf, CR);
donatien 0:8f57713b2147 413 /*
donatien 0:8f57713b2147 414 Different cases at this point:
donatien 0:8f57713b2147 415 - CRLF sequence: this is the end of the line
donatien 0:8f57713b2147 416 - CR%c sequence : unexpected
donatien 0:8f57713b2147 417 - CR incomplete sequence: more data is needed to determine which action to take
donatien 0:8f57713b2147 418 */
donatien 0:8f57713b2147 419
donatien 0:8f57713b2147 420 //Try to look for a '>' (greater than character) that marks an entry prompt
donatien 0:8f57713b2147 421 char* greaterThanPtr = strchr(m_inputBuf, GD);
donatien 0:8f57713b2147 422 /*
donatien 0:8f57713b2147 423 This character must be detected as there is no CRLF sequence at the end of an entry prompt
donatien 0:8f57713b2147 424 */
donatien 0:8f57713b2147 425
donatien 0:8f57713b2147 426 if(crPtr != NULL)
donatien 0:8f57713b2147 427 {
donatien 0:8f57713b2147 428 DBG("CR char found");
donatien 0:8f57713b2147 429 int crPos = crPtr - m_inputBuf;
donatien 0:8f57713b2147 430 //To determine the sequence we need at least 2 chars
donatien 0:8f57713b2147 431 if(m_inputPos - crPos >= 2)
donatien 0:8f57713b2147 432 {
donatien 0:8f57713b2147 433 //Look for a LF char next to the CR char
donatien 0:8f57713b2147 434 if(m_inputBuf[crPos + 1] == LF)
donatien 0:8f57713b2147 435 {
donatien 0:8f57713b2147 436 DBG("End of new line found");
donatien 0:8f57713b2147 437 //This is the end of line
donatien 0:8f57713b2147 438 //Replace m_inputBuf[crPos] with null-terminating char
donatien 0:8f57713b2147 439 m_inputBuf[crPos] = '\0';
donatien 0:8f57713b2147 440 //Process line
donatien 0:8f57713b2147 441 int ret = processReadLine();
donatien 0:8f57713b2147 442 if(ret)
donatien 0:8f57713b2147 443 {
donatien 0:8f57713b2147 444 m_inputPos = 0;
donatien 0:8f57713b2147 445 lineDetected = false;
donatien 0:8f57713b2147 446 return ret;
donatien 0:8f57713b2147 447 }
donatien 0:8f57713b2147 448
donatien 0:8f57713b2147 449 //If sendData has been called, all incoming data has been discarded
donatien 0:8f57713b2147 450 if(m_inputPos > 0)
donatien 0:8f57713b2147 451 {
donatien 0:8f57713b2147 452 //Shift remaining data to beginning of buffer
donatien 0:8f57713b2147 453 memmove(m_inputBuf, m_inputBuf + crPos + 2, (m_inputPos + 1) - (crPos + 2)); //Move null-terminating char as well
donatien 0:8f57713b2147 454 m_inputPos = m_inputPos - (crPos + 2); //Adjust m_inputPos
donatien 0:8f57713b2147 455 }
donatien 0:8f57713b2147 456
donatien 0:8f57713b2147 457 DBG("One line was successfully processed");
donatien 0:8f57713b2147 458 lineProcessed = true; //Line was processed with success
donatien 0:8f57713b2147 459 }
donatien 0:8f57713b2147 460 else
donatien 0:8f57713b2147 461 {
donatien 0:8f57713b2147 462 //This is completely unexpected, discard all chars till the CR char to try to recover good state
donatien 0:8f57713b2147 463 WARN("Unexpected %c char (%02d code) found in incoming line", m_inputBuf[crPos + 1]);
donatien 0:8f57713b2147 464 memmove(m_inputBuf, m_inputBuf + crPos + 1, (m_inputPos + 1) - (crPos + 1)); //Move null-terminating char as well
donatien 0:8f57713b2147 465 m_inputPos = m_inputPos - (crPos + 1); //Adjust m_inputPos
donatien 0:8f57713b2147 466 }
donatien 0:8f57713b2147 467 lineDetected = false; //In both case search now for a new line
donatien 0:8f57713b2147 468 }
donatien 0:8f57713b2147 469 }
donatien 0:8f57713b2147 470 else if(greaterThanPtr != NULL)
donatien 0:8f57713b2147 471 {
donatien 0:8f57713b2147 472 DBG("> char found");
donatien 0:8f57713b2147 473 int gdPos = greaterThanPtr - m_inputBuf;
donatien 0:8f57713b2147 474 //To determine the sequence we need at least 2 chars
donatien 0:8f57713b2147 475 if(m_inputPos - gdPos >= 2)
donatien 0:8f57713b2147 476 {
donatien 0:8f57713b2147 477 //Look for a space char next to the GD char
donatien 0:8f57713b2147 478 if(m_inputBuf[gdPos + 1] == ' ')
donatien 0:8f57713b2147 479 {
donatien 0:8f57713b2147 480 //This is an entry prompt
donatien 0:8f57713b2147 481 //Replace m_inputBuf[gdPos] with null-terminating char
donatien 0:8f57713b2147 482 m_inputBuf[gdPos] = '\0';
donatien 0:8f57713b2147 483
donatien 0:8f57713b2147 484 //Shift remaining data to beginning of buffer
donatien 0:8f57713b2147 485 memmove(m_inputBuf, m_inputBuf + gdPos + 1, (m_inputPos + 1) - (gdPos + 1)); //Move null-terminating char as well
donatien 0:8f57713b2147 486 m_inputPos = m_inputPos - (gdPos + 1); //Adjust m_inputPos
donatien 0:8f57713b2147 487
donatien 0:8f57713b2147 488 //Process prompt
donatien 0:8f57713b2147 489 ret = processEntryPrompt();
donatien 0:8f57713b2147 490 if(ret)
donatien 0:8f57713b2147 491 {
donatien 0:8f57713b2147 492 m_inputPos = 0;
donatien 0:8f57713b2147 493 lineDetected = false;
donatien 0:8f57713b2147 494 return ret;
donatien 0:8f57713b2147 495 }
donatien 0:8f57713b2147 496
donatien 0:8f57713b2147 497 DBG("One line was successfully processed");
donatien 0:8f57713b2147 498 lineProcessed = true; //Line was processed with success
donatien 0:8f57713b2147 499 }
donatien 0:8f57713b2147 500 else
donatien 0:8f57713b2147 501 {
donatien 0:8f57713b2147 502 //This is completely unexpected, discard all chars till the GD char to try to recover good state
donatien 0:8f57713b2147 503 WARN("Unexpected %c char (%02d code) found in incoming line", m_inputBuf[gdPos + 1]);
donatien 0:8f57713b2147 504 memmove(m_inputBuf, m_inputBuf + gdPos + 1, (m_inputPos + 1) - (gdPos + 1)); //Move null-terminating char as well
donatien 0:8f57713b2147 505 m_inputPos = m_inputPos - (gdPos + 1); //Adjust m_inputPos
donatien 0:8f57713b2147 506 }
donatien 0:8f57713b2147 507 lineDetected = false; //In both case search now for a new line
donatien 0:8f57713b2147 508 }
donatien 0:8f57713b2147 509 }
donatien 0:8f57713b2147 510 }
donatien 0:8f57713b2147 511 } while(lineProcessed); //If one complete line was processed there might be other incoming lines that can also be processed without reading the buffer again
donatien 0:8f57713b2147 512
donatien 0:8f57713b2147 513 //If the line could not be processed AND buffer is full, it means that we won't ever be able to process it (buffer too short)
donatien 0:8f57713b2147 514 if(m_inputPos == AT_INPUT_BUF_SIZE - 1)
donatien 0:8f57713b2147 515 {
donatien 0:8f57713b2147 516 //Discard everything
donatien 0:8f57713b2147 517 m_inputPos = 0;
donatien 0:8f57713b2147 518 WARN("Incoming buffer is too short to process incoming line");
donatien 0:8f57713b2147 519 //Look for a new line
donatien 0:8f57713b2147 520 lineDetected = false;
donatien 0:8f57713b2147 521 }
donatien 0:8f57713b2147 522
donatien 0:8f57713b2147 523 DBG("Processed every full incoming lines");
donatien 0:8f57713b2147 524
donatien 0:8f57713b2147 525 return OK;
donatien 0:8f57713b2147 526 }
donatien 0:8f57713b2147 527
donatien 0:8f57713b2147 528 int ATCommandsInterface::trySendCommand()
donatien 0:8f57713b2147 529 {
donatien 0:8f57713b2147 530 osEvent evt = m_env2AT.get(0);
donatien 0:8f57713b2147 531 DBG("status = %d, msg = %d", evt.status, evt.value.p);
donatien 0:8f57713b2147 532 if(evt.status == osEventMail)
donatien 0:8f57713b2147 533 {
donatien 0:8f57713b2147 534 int* msg = (int*) evt.value.p;
donatien 0:8f57713b2147 535 if( *msg == AT_CMD_READY ) //Command pending
donatien 0:8f57713b2147 536 {
donatien 0:8f57713b2147 537 if(m_transactionState != IDLE)
donatien 0:8f57713b2147 538 {
donatien 0:8f57713b2147 539 WARN("Previous command not processed!");
donatien 0:8f57713b2147 540 }
donatien 0:8f57713b2147 541 DBG("Sending pending command");
donatien 0:8f57713b2147 542 m_pStream->write((uint8_t*)m_transactionCommand, strlen(m_transactionCommand), osWaitForever);
donatien 0:8f57713b2147 543 char cr = CR;
donatien 0:8f57713b2147 544 m_pStream->write((uint8_t*)&cr, 1, osWaitForever); //Carriage return line terminator
donatien 0:8f57713b2147 545 m_transactionState = COMMAND_SENT;
donatien 0:8f57713b2147 546 }
donatien 0:8f57713b2147 547 else
donatien 0:8f57713b2147 548 {
donatien 0:8f57713b2147 549 m_transactionState = IDLE; //State-machine reset
donatien 0:8f57713b2147 550 }
donatien 0:8f57713b2147 551 m_env2AT.free(msg);
donatien 0:8f57713b2147 552 }
donatien 0:8f57713b2147 553 return OK;
donatien 0:8f57713b2147 554 }
donatien 0:8f57713b2147 555
donatien 0:8f57713b2147 556 int ATCommandsInterface::processReadLine()
donatien 0:8f57713b2147 557 {
donatien 0:8f57713b2147 558 DBG("Processing read line [%s]", m_inputBuf);
donatien 0:8f57713b2147 559 //The line is stored in m_inputBuf
donatien 0:8f57713b2147 560 if(m_transactionState == COMMAND_SENT)
donatien 0:8f57713b2147 561 {
donatien 0:8f57713b2147 562 //If the command has been sent, checks echo to see if it has been received properly
donatien 0:8f57713b2147 563 if( strcmp(m_transactionCommand, m_inputBuf) == 0 )
donatien 0:8f57713b2147 564 {
donatien 0:8f57713b2147 565 DBG("Command echo received");
donatien 0:8f57713b2147 566 //If so, it means that the following lines will only be solicited results
donatien 0:8f57713b2147 567 m_transactionState = READING_RESULT;
donatien 0:8f57713b2147 568 return OK;
donatien 0:8f57713b2147 569 }
donatien 0:8f57713b2147 570 }
donatien 0:8f57713b2147 571 if(m_transactionState == IDLE || m_transactionState == COMMAND_SENT)
donatien 0:8f57713b2147 572 {
donatien 0:8f57713b2147 573 bool found = false;
donatien 0:8f57713b2147 574 char* pSemicol = strchr(m_inputBuf, ':');
donatien 0:8f57713b2147 575 char* pData = NULL;
donatien 0:8f57713b2147 576 if( pSemicol != NULL ) //Split the identifier & the result code (if it exists)
donatien 0:8f57713b2147 577 {
donatien 0:8f57713b2147 578 *pSemicol = '\0';
donatien 0:8f57713b2147 579 pData = pSemicol + 1;
donatien 0:8f57713b2147 580 if(pData[0]==' ')
donatien 0:8f57713b2147 581 {
donatien 0:8f57713b2147 582 pData++; //Suppress whitespace
donatien 0:8f57713b2147 583 }
donatien 0:8f57713b2147 584 }
donatien 0:8f57713b2147 585 //Looks for a unsolicited result code; we can have m_transactionState == COMMAND_SENT as the code may have arrived just before we sent the command
donatien 0:8f57713b2147 586 m_eventsMtx.lock();
donatien 0:8f57713b2147 587 //Go through the list
donatien 0:8f57713b2147 588 for(int i = 0; i < MAX_AT_EVENTS_HANDLERS; i++) //Find a free slot
donatien 0:8f57713b2147 589 {
donatien 0:8f57713b2147 590 if( m_eventsHandlers[i] != NULL )
donatien 0:8f57713b2147 591 {
donatien 0:8f57713b2147 592 if( m_eventsHandlers[i]->isATCodeHandled(m_inputBuf) )
donatien 0:8f57713b2147 593 {
donatien 0:8f57713b2147 594 m_eventsHandlers[i]->onEvent(m_inputBuf, pData);
donatien 0:8f57713b2147 595 found = true; //Do not break here as there might be multiple handlers for one event type
donatien 0:8f57713b2147 596 }
donatien 0:8f57713b2147 597 }
donatien 0:8f57713b2147 598 }
donatien 0:8f57713b2147 599 m_eventsMtx.unlock();
donatien 0:8f57713b2147 600 if(found)
donatien 0:8f57713b2147 601 {
donatien 0:8f57713b2147 602 return OK;
donatien 0:8f57713b2147 603 }
donatien 0:8f57713b2147 604 }
donatien 0:8f57713b2147 605 if(m_transactionState == READING_RESULT)
donatien 0:8f57713b2147 606 {
donatien 0:8f57713b2147 607 //The following lines can either be a command response or a result code (OK / ERROR / CONNECT / +CME ERROR: %s / +CMS ERROR: %s)
donatien 0:8f57713b2147 608 if(strcmp("OK", m_inputBuf) == 0)
donatien 0:8f57713b2147 609 {
donatien 0:8f57713b2147 610 DBG("OK result received");
donatien 0:8f57713b2147 611 m_transactionResult.code = 0;
donatien 0:8f57713b2147 612 m_transactionResult.result = ATResult::AT_OK;
donatien 0:8f57713b2147 613 m_transactionState = IDLE;
donatien 0:8f57713b2147 614 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:8f57713b2147 615 *msg = AT_RESULT_READY;
donatien 0:8f57713b2147 616 m_AT2Env.put(msg); //Command has been processed
donatien 0:8f57713b2147 617 return OK;
donatien 0:8f57713b2147 618 }
donatien 0:8f57713b2147 619 else if(strcmp("ERROR", m_inputBuf) == 0)
donatien 0:8f57713b2147 620 {
donatien 0:8f57713b2147 621 DBG("ERROR result received");
donatien 0:8f57713b2147 622 m_transactionResult.code = 0;
donatien 0:8f57713b2147 623 m_transactionResult.result = ATResult::AT_ERROR;
donatien 0:8f57713b2147 624 m_transactionState = IDLE;
donatien 0:8f57713b2147 625 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:8f57713b2147 626 *msg = AT_RESULT_READY;
donatien 0:8f57713b2147 627 m_AT2Env.put(msg); //Command has been processed
donatien 0:8f57713b2147 628 return OK;
donatien 0:8f57713b2147 629 }
donatien 0:8f57713b2147 630 else if(strncmp("CONNECT", m_inputBuf, 7 /*=strlen("CONNECT")*/) == 0) //Result can be "CONNECT" or "CONNECT %d", indicating baudrate
donatien 0:8f57713b2147 631 {
donatien 0:8f57713b2147 632 DBG("CONNECT result received");
donatien 0:8f57713b2147 633 m_transactionResult.code = 0;
donatien 0:8f57713b2147 634 m_transactionResult.result = ATResult::AT_CONNECT;
donatien 0:8f57713b2147 635 m_transactionState = IDLE;
donatien 0:8f57713b2147 636 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:8f57713b2147 637 *msg = AT_RESULT_READY;
donatien 0:8f57713b2147 638 m_AT2Env.put(msg); //Command has been processed
donatien 0:8f57713b2147 639 return OK;
donatien 0:8f57713b2147 640 }
donatien 0:8f57713b2147 641 else if(strcmp("COMMAND NOT SUPPORT", m_inputBuf) == 0) //Huawei-specific, not normalized
donatien 0:8f57713b2147 642 {
donatien 0:8f57713b2147 643 DBG("COMMAND NOT SUPPORT result received");
donatien 0:8f57713b2147 644 m_transactionResult.code = 0;
donatien 0:8f57713b2147 645 m_transactionResult.result = ATResult::AT_ERROR;
donatien 0:8f57713b2147 646 m_transactionState = IDLE;
donatien 0:8f57713b2147 647 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:8f57713b2147 648 *msg = AT_RESULT_READY;
donatien 0:8f57713b2147 649 m_AT2Env.put(msg); //Command has been processed
donatien 0:8f57713b2147 650 return OK;
donatien 0:8f57713b2147 651 }
donatien 0:8f57713b2147 652 else if(strstr(m_inputBuf, "+CME ERROR:") == m_inputBuf) //Mobile Equipment Error
donatien 0:8f57713b2147 653 {
donatien 0:8f57713b2147 654 std::sscanf(m_inputBuf + 12 /* =strlen("+CME ERROR: ") */, "%d", &m_transactionResult.code);
donatien 0:8f57713b2147 655 DBG("+CME ERROR: %d result received", m_transactionResult.code);
donatien 0:8f57713b2147 656 m_transactionResult.result = ATResult::AT_CME_ERROR;
donatien 0:8f57713b2147 657 m_transactionState = IDLE;
donatien 0:8f57713b2147 658 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:8f57713b2147 659 *msg = AT_RESULT_READY;
donatien 0:8f57713b2147 660 m_AT2Env.put(msg); //Command has been processed
donatien 0:8f57713b2147 661 return OK;
donatien 0:8f57713b2147 662 }
donatien 0:8f57713b2147 663 else if(strstr(m_inputBuf, "+CMS ERROR:") == m_inputBuf) //SIM Error
donatien 0:8f57713b2147 664 {
donatien 0:8f57713b2147 665 std::sscanf(m_inputBuf + 13 /* =strlen("+CME ERROR: ") */, "%d", &m_transactionResult.code);
donatien 0:8f57713b2147 666 DBG("+CMS ERROR: %d result received", m_transactionResult.code);
donatien 0:8f57713b2147 667 m_transactionResult.result = ATResult::AT_CMS_ERROR;
donatien 0:8f57713b2147 668 m_transactionState = IDLE;
donatien 0:8f57713b2147 669 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:8f57713b2147 670 *msg = AT_RESULT_READY;
donatien 0:8f57713b2147 671 m_AT2Env.put(msg); //Command has been processed
donatien 0:8f57713b2147 672 return OK;
donatien 0:8f57713b2147 673 }
donatien 0:8f57713b2147 674 else
donatien 0:8f57713b2147 675 {
donatien 0:8f57713b2147 676 DBG("Unprocessed result received: '%s'", m_inputBuf);
donatien 0:8f57713b2147 677 //Must call transaction processor to complete line processing
donatien 0:8f57713b2147 678 int ret = m_pTransactionProcessor->onNewATResponseLine(this, m_inputBuf); //Here sendData can be called
donatien 0:8f57713b2147 679 return ret;
donatien 0:8f57713b2147 680 }
donatien 0:8f57713b2147 681 }
donatien 0:8f57713b2147 682
donatien 0:8f57713b2147 683 return OK;
donatien 0:8f57713b2147 684 }
donatien 0:8f57713b2147 685
donatien 0:8f57713b2147 686 int ATCommandsInterface::processEntryPrompt()
donatien 0:8f57713b2147 687 {
donatien 0:8f57713b2147 688 DBG("Calling prompt handler");
donatien 0:8f57713b2147 689 int ret = m_pTransactionProcessor->onNewEntryPrompt(this); //Here sendData can be called
donatien 0:8f57713b2147 690
donatien 0:8f57713b2147 691 if( ret != NET_MOREINFO ) //A new prompt is expected
donatien 0:8f57713b2147 692 {
donatien 0:8f57713b2147 693 DBG("Sending break character");
donatien 0:8f57713b2147 694 //Send CTRL+Z (break sequence) to exit prompt
donatien 0:8f57713b2147 695 char seq[2] = {BRK, 0x00};
donatien 0:8f57713b2147 696 sendData(seq);
donatien 0:8f57713b2147 697 }
donatien 0:8f57713b2147 698 return OK;
donatien 0:8f57713b2147 699 }
donatien 0:8f57713b2147 700
donatien 0:8f57713b2147 701 //Commands that can be called during onNewATResponseLine callback, additionally to close()
donatien 0:8f57713b2147 702 //Access to this method is protected (can ONLY be called on processing thread during IATCommandsProcessor::onNewATResponseLine execution)
donatien 0:8f57713b2147 703 int ATCommandsInterface::sendData(const char* data)
donatien 0:8f57713b2147 704 {
donatien 0:8f57713b2147 705 //m_inputBuf is cleared at this point (and MUST therefore be empty)
donatien 0:8f57713b2147 706 int dataLen = strlen(data);
donatien 0:8f57713b2147 707 DBG("Sending raw string of length %d", dataLen);
donatien 0:8f57713b2147 708 int ret = m_pStream->write((uint8_t*)data, dataLen, osWaitForever);
donatien 0:8f57713b2147 709 if(ret)
donatien 0:8f57713b2147 710 {
donatien 0:8f57713b2147 711 WARN("Could not write to stream (returned %d)", ret);
donatien 0:8f57713b2147 712 return ret;
donatien 0:8f57713b2147 713 }
donatien 0:8f57713b2147 714
donatien 0:8f57713b2147 715 int dataPos = 0;
donatien 0:8f57713b2147 716 do
donatien 0:8f57713b2147 717 {
donatien 0:8f57713b2147 718 //Read echo
donatien 0:8f57713b2147 719 size_t readLen;
donatien 0:8f57713b2147 720 int ret = m_pStream->read((uint8_t*)m_inputBuf, &readLen, MIN(dataLen - dataPos, AT_INPUT_BUF_SIZE - 1), osWaitForever); //Make sure we do not read more than needed otherwise it could break the parser
donatien 0:8f57713b2147 721 if(ret)
donatien 0:8f57713b2147 722 {
donatien 0:8f57713b2147 723 WARN("Could not read from stream (returned %d)", ret);
donatien 0:8f57713b2147 724 return ret;
donatien 0:8f57713b2147 725 };
donatien 0:8f57713b2147 726
donatien 0:8f57713b2147 727 if( memcmp(m_inputBuf, data + dataPos, readLen) != 0 )
donatien 0:8f57713b2147 728 {
donatien 0:8f57713b2147 729 //Echo does not match output
donatien 0:8f57713b2147 730 WARN("Echo does not match output");
donatien 0:8f57713b2147 731 return NET_DIFF;
donatien 0:8f57713b2147 732 }
donatien 0:8f57713b2147 733
donatien 0:8f57713b2147 734 dataPos += readLen;
donatien 0:8f57713b2147 735 //If all characters have not been read yet
donatien 0:8f57713b2147 736
donatien 0:8f57713b2147 737 } while(dataPos < dataLen);
donatien 0:8f57713b2147 738
donatien 0:8f57713b2147 739 DBG("String sent successfully");
donatien 0:8f57713b2147 740
donatien 0:8f57713b2147 741 m_inputPos = 0; //Reset input buffer state
donatien 0:8f57713b2147 742
donatien 0:8f57713b2147 743 return OK;
donatien 0:8f57713b2147 744 }
donatien 0:8f57713b2147 745
donatien 0:8f57713b2147 746 /*static*/ void ATCommandsInterface::staticCallback(void const* p)
donatien 0:8f57713b2147 747 {
donatien 0:8f57713b2147 748 ((ATCommandsInterface*)p)->process();
donatien 0:8f57713b2147 749 }
donatien 0:8f57713b2147 750
donatien 0:8f57713b2147 751 int ATCommandsInterface::ATResultToReturnCode(ATResult result) //Helper
donatien 0:8f57713b2147 752 {
donatien 0:8f57713b2147 753 if(result.result == ATResult::AT_OK)
donatien 0:8f57713b2147 754 {
donatien 0:8f57713b2147 755 return OK;
donatien 0:8f57713b2147 756 }
donatien 0:8f57713b2147 757 else
donatien 0:8f57713b2147 758 {
donatien 0:8f57713b2147 759 return NET_MOREINFO;
donatien 0:8f57713b2147 760 }
donatien 0:8f57713b2147 761 }
donatien 0:8f57713b2147 762
donatien 0:8f57713b2147 763 /*virtual*/ int ATCommandsInterface::onNewATResponseLine(ATCommandsInterface* pInst, const char* line) //Default implementation for simple commands handling
donatien 0:8f57713b2147 764 {
donatien 0:8f57713b2147 765 return OK;
donatien 0:8f57713b2147 766 }
donatien 0:8f57713b2147 767
donatien 0:8f57713b2147 768 /*virtual*/ int ATCommandsInterface::onNewEntryPrompt(ATCommandsInterface* pInst) //Default implementation (just sends Ctrl+Z to exit the prompt by returning OK right-away)
donatien 0:8f57713b2147 769 {
donatien 0:8f57713b2147 770 return OK;
donatien 0:8f57713b2147 771 }
donatien 0:8f57713b2147 772
donatien 0:8f57713b2147 773 void ATCommandsInterface::process() //Processing thread
donatien 0:8f57713b2147 774 {
donatien 0:8f57713b2147 775 DBG("AT Thread started");
donatien 0:8f57713b2147 776 while(true)
donatien 0:8f57713b2147 777 {
donatien 0:8f57713b2147 778 DBG("AT Processing on hold");
donatien 0:8f57713b2147 779 m_processingThread.signal_wait(AT_SIG_PROCESSING_START); //Block until the process is started
donatien 0:8f57713b2147 780
donatien 0:8f57713b2147 781 m_processingMtx.lock();
donatien 0:8f57713b2147 782 DBG("AT Processing started");
donatien 0:8f57713b2147 783 //First of all discard buffer
donatien 0:8f57713b2147 784 int ret;
donatien 0:8f57713b2147 785 size_t readLen;
donatien 0:8f57713b2147 786 do //Drop everything
donatien 0:8f57713b2147 787 {
donatien 0:8f57713b2147 788 ret = m_pStream->read((uint8_t*)m_inputBuf, &readLen, AT_INPUT_BUF_SIZE - 1, 0); //Do NOT wait at this point
donatien 0:8f57713b2147 789 } while(ret == OK);
donatien 0:8f57713b2147 790 m_inputPos = 0; //Clear input buffer
donatien 0:8f57713b2147 791 do
donatien 0:8f57713b2147 792 {
donatien 0:8f57713b2147 793 DBG("Trying to read a new line");
donatien 0:8f57713b2147 794 tryReadLine();
donatien 0:8f57713b2147 795 DBG("Trying to send a pending command");
donatien 0:8f57713b2147 796 trySendCommand();
donatien 0:8f57713b2147 797 } while( m_processingThread.signal_wait(AT_SIG_PROCESSING_STOP, 0).status != osEventSignal ); //Loop until the process is interrupted
donatien 0:8f57713b2147 798 m_processingMtx.unlock();
donatien 0:8f57713b2147 799 DBG("AT Processing stopped");
donatien 0:8f57713b2147 800 }
donatien 0:8f57713b2147 801 }
donatien 0:8f57713b2147 802