phs fan / AbitModemInterface

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Dependencies:   Socket lwip-sys lwip

Fork of AbitUSBModem by phs fan

at/ATCommandsInterface.cpp@59:593fb493172f, 2012-10-24 (annotated)

Committer:
donatien
Date:
Wed Oct 24 14:13:49 2012 +0000
Revision:
59:593fb493172f
Parent:
55:07b9b48cfe09
Child:
60:763eefc845b1
- Disabling/Re-enabling of unsollicited response codes between commands to avoid having unsollicited result codes mixed up with commands responses; - Suppressed 100ms guard time in ATCommandsInterface; - Fixed race condition in ATCommandsInterface

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:3b2f052c333b 1 /* ATCommandsInterface.cpp */
donatien 22:06fb2a93a1f6 2 /* Copyright (C) 2012 mbed.org, MIT License
donatien 22:06fb2a93a1f6 3 *
donatien 22:06fb2a93a1f6 4 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
donatien 22:06fb2a93a1f6 5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
donatien 22:06fb2a93a1f6 6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
donatien 22:06fb2a93a1f6 7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
donatien 22:06fb2a93a1f6 8 * furnished to do so, subject to the following conditions:
donatien 22:06fb2a93a1f6 9 *
donatien 22:06fb2a93a1f6 10 * The above copyright notice and this permission notice shall be included in all copies or
donatien 22:06fb2a93a1f6 11 * substantial portions of the Software.
donatien 22:06fb2a93a1f6 12 *
donatien 22:06fb2a93a1f6 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
donatien 22:06fb2a93a1f6 14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
donatien 22:06fb2a93a1f6 15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
donatien 22:06fb2a93a1f6 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
donatien 22:06fb2a93a1f6 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
donatien 22:06fb2a93a1f6 18 */
donatien 0:3b2f052c333b 19
donatien 55:07b9b48cfe09 20 #define __DEBUG__ 2 //ERR+WARN
donatien 0:3b2f052c333b 21 #ifndef __MODULE__
donatien 0:3b2f052c333b 22 #define __MODULE__ "ATCommandsInterface.cpp"
donatien 0:3b2f052c333b 23 #endif
donatien 0:3b2f052c333b 24
donatien 0:3b2f052c333b 25 #include "core/fwk.h"
donatien 0:3b2f052c333b 26
donatien 0:3b2f052c333b 27 #include <cstdio>
donatien 0:3b2f052c333b 28 //#include <cstring> //For memset, strstr...
donatien 0:3b2f052c333b 29
donatien 0:3b2f052c333b 30 using std::memmove;
donatien 0:3b2f052c333b 31
donatien 0:3b2f052c333b 32 #include "ATCommandsInterface.h"
donatien 0:3b2f052c333b 33
donatien 0:3b2f052c333b 34 ATCommandsInterface::ATCommandsInterface(IOStream* pStream) :
donatien 0:3b2f052c333b 35 m_pStream(pStream), m_open(false), m_env2AT(), m_AT2Env(), m_processingMtx(),
donatien 0:3b2f052c333b 36 m_processingThread(&ATCommandsInterface::staticCallback, this, (osPriority)AT_THREAD_PRIORITY, 4*192),
donatien 59:593fb493172f 37 m_eventsMgmtMtx(), m_eventsProcessingMtx()
donatien 0:3b2f052c333b 38 {
donatien 0:3b2f052c333b 39 memset(m_eventsHandlers, 0, MAX_AT_EVENTS_HANDLERS * sizeof(IATEventsHandler*));
donatien 0:3b2f052c333b 40
donatien 0:3b2f052c333b 41 m_processingMtx.lock();
donatien 0:3b2f052c333b 42 }
donatien 0:3b2f052c333b 43
donatien 0:3b2f052c333b 44 //Open connection to AT Interface in order to execute command & register/unregister events
donatien 0:3b2f052c333b 45 int ATCommandsInterface::open()
donatien 0:3b2f052c333b 46 {
donatien 0:3b2f052c333b 47 if( m_open )
donatien 0:3b2f052c333b 48 {
donatien 0:3b2f052c333b 49 WARN("AT interface is already open");
donatien 0:3b2f052c333b 50 return OK;
donatien 0:3b2f052c333b 51 }
donatien 0:3b2f052c333b 52 DBG("Opening AT interface");
donatien 0:3b2f052c333b 53 //Start processing
donatien 0:3b2f052c333b 54 m_processingThread.signal_set(AT_SIG_PROCESSING_START);
donatien 0:3b2f052c333b 55
donatien 0:3b2f052c333b 56 m_processingMtx.unlock();
donatien 0:3b2f052c333b 57
donatien 0:3b2f052c333b 58 m_open = true;
donatien 0:3b2f052c333b 59
donatien 0:3b2f052c333b 60 DBG("AT interface opened");
donatien 59:593fb493172f 61
donatien 0:3b2f052c333b 62 return OK;
donatien 0:3b2f052c333b 63 }
donatien 0:3b2f052c333b 64
donatien 59:593fb493172f 65 //Initialize AT link & start events processing
donatien 0:3b2f052c333b 66 int ATCommandsInterface::init()
donatien 0:3b2f052c333b 67 {
donatien 0:3b2f052c333b 68 DBG("Sending ATZ E1 V1");
donatien 59:593fb493172f 69
donatien 59:593fb493172f 70 //Lock transaction mutex
donatien 59:593fb493172f 71 m_transactionMtx.lock();
donatien 59:593fb493172f 72
donatien 0:3b2f052c333b 73 //Should we flush m_pStream at this point ???
donatien 0:3b2f052c333b 74 int err;
donatien 0:3b2f052c333b 75 int tries = 5;
donatien 0:3b2f052c333b 76 do
donatien 0:3b2f052c333b 77 {
donatien 59:593fb493172f 78 err = executeInternal("ATZ E1 V1", this, NULL, 3000); //Enable echo and verbosity
donatien 0:3b2f052c333b 79 if(err && tries)
donatien 0:3b2f052c333b 80 {
donatien 0:3b2f052c333b 81 WARN("No response, trying again");
donatien 0:3b2f052c333b 82 Thread::wait(1000); //Give dongle time to recover
donatien 0:3b2f052c333b 83 }
donatien 0:3b2f052c333b 84 } while(err && tries--);
donatien 0:3b2f052c333b 85 if( err )
donatien 0:3b2f052c333b 86 {
donatien 0:3b2f052c333b 87 ERR("Sending ATZ E1 V1 returned with err code %d", err);
donatien 59:593fb493172f 88 m_transactionMtx.unlock();
donatien 0:3b2f052c333b 89 return err;
donatien 0:3b2f052c333b 90 }
donatien 59:593fb493172f 91
donatien 59:593fb493172f 92 //Enable events handling and execute events enabling commands
donatien 59:593fb493172f 93 enableEvents();
donatien 0:3b2f052c333b 94
donatien 0:3b2f052c333b 95 DBG("AT interface initialized");
donatien 59:593fb493172f 96
donatien 59:593fb493172f 97 //Unlock transaction mutex
donatien 59:593fb493172f 98 m_transactionMtx.unlock();
donatien 0:3b2f052c333b 99
donatien 0:3b2f052c333b 100 return OK;
donatien 0:3b2f052c333b 101 }
donatien 0:3b2f052c333b 102
donatien 0:3b2f052c333b 103 //Close connection
donatien 0:3b2f052c333b 104 int ATCommandsInterface::close()
donatien 0:3b2f052c333b 105 {
donatien 0:3b2f052c333b 106 if( !m_open )
donatien 0:3b2f052c333b 107 {
donatien 0:3b2f052c333b 108 WARN("AT interface is already closed");
donatien 0:3b2f052c333b 109 return OK;
donatien 0:3b2f052c333b 110 }
donatien 0:3b2f052c333b 111
donatien 0:3b2f052c333b 112 DBG("Closing AT interface");
donatien 0:3b2f052c333b 113
donatien 0:3b2f052c333b 114 //Stop processing
donatien 0:3b2f052c333b 115 m_processingThread.signal_set(AT_SIG_PROCESSING_STOP);
donatien 0:3b2f052c333b 116 //m_stopSphre.release();
donatien 0:3b2f052c333b 117
donatien 0:3b2f052c333b 118 int* msg = m_env2AT.alloc(osWaitForever);
donatien 0:3b2f052c333b 119 *msg = AT_STOP;
donatien 0:3b2f052c333b 120 m_env2AT.put(msg); //Used to unstall the process if needed
donatien 0:3b2f052c333b 121
donatien 0:3b2f052c333b 122 //Unlock process routine (abort read)
donatien 0:3b2f052c333b 123 m_pStream->abortRead(); //This is thread-safe
donatien 0:3b2f052c333b 124 m_processingMtx.lock();
donatien 0:3b2f052c333b 125 m_open = false;
donatien 0:3b2f052c333b 126
donatien 59:593fb493172f 127 //Disable events handling and advertize this to the events handlers
donatien 59:593fb493172f 128 disableEvents();
donatien 0:3b2f052c333b 129
donatien 0:3b2f052c333b 130 DBG("AT interface closed");
donatien 0:3b2f052c333b 131 return OK;
donatien 0:3b2f052c333b 132 }
donatien 0:3b2f052c333b 133
donatien 0:3b2f052c333b 134 bool ATCommandsInterface::isOpen()
donatien 0:3b2f052c333b 135 {
donatien 0:3b2f052c333b 136 return m_open;
donatien 0:3b2f052c333b 137 }
donatien 0:3b2f052c333b 138
donatien 0:3b2f052c333b 139 int ATCommandsInterface::executeSimple(const char* command, ATResult* pResult, uint32_t timeout/*=1000*/)
donatien 0:3b2f052c333b 140 {
donatien 0:3b2f052c333b 141 return execute(command, this, pResult, timeout);
donatien 0:3b2f052c333b 142 }
donatien 0:3b2f052c333b 143
donatien 0:3b2f052c333b 144 int ATCommandsInterface::execute(const char* command, IATCommandsProcessor* pProcessor, ATResult* pResult, uint32_t timeout/*=1000*/)
donatien 0:3b2f052c333b 145 {
donatien 0:3b2f052c333b 146 if(!m_open)
donatien 0:3b2f052c333b 147 {
donatien 0:3b2f052c333b 148 WARN("Interface is not open!");
donatien 0:3b2f052c333b 149 return NET_INVALID;
donatien 0:3b2f052c333b 150 }
donatien 0:3b2f052c333b 151
donatien 0:3b2f052c333b 152 //Lock transaction mutex
donatien 0:3b2f052c333b 153 m_transactionMtx.lock();
donatien 59:593fb493172f 154
donatien 59:593fb493172f 155 disableEvents(); //Disable unsollicited result codes
donatien 59:593fb493172f 156 int ret = executeInternal(command, pProcessor, pResult, timeout);
donatien 59:593fb493172f 157 enableEvents(); //Re-enable unsollicited result codes whatever the result of the command is
donatien 59:593fb493172f 158
donatien 59:593fb493172f 159 //Unlock transaction mutex
donatien 59:593fb493172f 160 m_transactionMtx.unlock();
donatien 59:593fb493172f 161
donatien 59:593fb493172f 162 return ret;
donatien 59:593fb493172f 163 }
donatien 59:593fb493172f 164
donatien 59:593fb493172f 165 int ATCommandsInterface::registerEventsHandler(IATEventsHandler* pHdlr)
donatien 59:593fb493172f 166 {
donatien 59:593fb493172f 167 m_eventsMgmtMtx.lock();
donatien 59:593fb493172f 168 m_eventsProcessingMtx.lock();
donatien 59:593fb493172f 169 for(int i = 0; i < MAX_AT_EVENTS_HANDLERS; i++) //Find a free slot
donatien 59:593fb493172f 170 {
donatien 59:593fb493172f 171 if( m_eventsHandlers[i] == NULL )
donatien 59:593fb493172f 172 {
donatien 59:593fb493172f 173 m_eventsHandlers[i] = pHdlr;
donatien 59:593fb493172f 174 m_eventsProcessingMtx.unlock();
donatien 59:593fb493172f 175 m_eventsMgmtMtx.unlock();
donatien 59:593fb493172f 176 return OK;
donatien 59:593fb493172f 177 }
donatien 59:593fb493172f 178 }
donatien 59:593fb493172f 179 m_eventsProcessingMtx.unlock();
donatien 59:593fb493172f 180 m_eventsMgmtMtx.unlock();
donatien 59:593fb493172f 181 return NET_OOM; //No room left
donatien 59:593fb493172f 182 }
donatien 59:593fb493172f 183
donatien 59:593fb493172f 184 int ATCommandsInterface::deregisterEventsHandler(IATEventsHandler* pHdlr)
donatien 59:593fb493172f 185 {
donatien 59:593fb493172f 186 m_eventsMgmtMtx.lock();
donatien 59:593fb493172f 187 m_eventsProcessingMtx.lock();
donatien 59:593fb493172f 188 for(int i = 0; i < MAX_AT_EVENTS_HANDLERS; i++) //Find handler in list
donatien 59:593fb493172f 189 {
donatien 59:593fb493172f 190 if( m_eventsHandlers[i] == pHdlr )
donatien 59:593fb493172f 191 {
donatien 59:593fb493172f 192 m_eventsHandlers[i] = NULL;
donatien 59:593fb493172f 193 m_eventsProcessingMtx.unlock();
donatien 59:593fb493172f 194 m_eventsMgmtMtx.unlock();
donatien 59:593fb493172f 195 return OK;
donatien 59:593fb493172f 196 }
donatien 59:593fb493172f 197 }
donatien 59:593fb493172f 198 m_eventsProcessingMtx.unlock();
donatien 59:593fb493172f 199 m_eventsMgmtMtx.unlock();
donatien 59:593fb493172f 200 return NET_NOTFOUND; //Not found
donatien 59:593fb493172f 201 }
donatien 59:593fb493172f 202
donatien 59:593fb493172f 203 //Private methods
donatien 59:593fb493172f 204
donatien 59:593fb493172f 205 int ATCommandsInterface::executeInternal(const char* command, IATCommandsProcessor* pProcessor, ATResult* pResult, uint32_t timeout/*=1000*/)
donatien 59:593fb493172f 206 {
donatien 59:593fb493172f 207 DBG("Executing command %s", command);
donatien 0:3b2f052c333b 208
donatien 0:3b2f052c333b 209 //Discard previous result if it arrived too late
donatien 0:3b2f052c333b 210 osEvent evt = m_AT2Env.get(0);
donatien 0:3b2f052c333b 211
donatien 0:3b2f052c333b 212 if(evt.status == osEventMail)
donatien 0:3b2f052c333b 213 {
donatien 0:3b2f052c333b 214 m_AT2Env.free((int*)evt.value.p);
donatien 0:3b2f052c333b 215 WARN("Previous result discarded");
donatien 0:3b2f052c333b 216 }
donatien 0:3b2f052c333b 217
donatien 0:3b2f052c333b 218 //Send params to the process routine
donatien 0:3b2f052c333b 219 m_transactionCommand = command;
donatien 0:3b2f052c333b 220 if(pProcessor != NULL)
donatien 0:3b2f052c333b 221 {
donatien 0:3b2f052c333b 222 m_pTransactionProcessor = pProcessor;
donatien 0:3b2f052c333b 223 }
donatien 0:3b2f052c333b 224 else
donatien 0:3b2f052c333b 225 {
donatien 0:3b2f052c333b 226 m_pTransactionProcessor = this; //Use default behaviour
donatien 0:3b2f052c333b 227 }
donatien 0:3b2f052c333b 228
donatien 0:3b2f052c333b 229 DBG("Sending command ready signal to AT thread & aborting current blocking read operation");
donatien 0:3b2f052c333b 230
donatien 0:3b2f052c333b 231 //Produce command ready signal
donatien 0:3b2f052c333b 232 int* msg = m_env2AT.alloc(osWaitForever);
donatien 0:3b2f052c333b 233 *msg = AT_CMD_READY;
donatien 0:3b2f052c333b 234 m_env2AT.put(msg);
donatien 0:3b2f052c333b 235
donatien 0:3b2f052c333b 236 DBG("Trying to enter abortRead()");
donatien 0:3b2f052c333b 237 //Unlock process routine (abort read)
donatien 0:3b2f052c333b 238 m_pStream->abortRead(); //This is thread-safe
donatien 0:3b2f052c333b 239
donatien 0:3b2f052c333b 240 //Wait for a result (get result message)
donatien 0:3b2f052c333b 241 evt = m_AT2Env.get(timeout);
donatien 0:3b2f052c333b 242
donatien 0:3b2f052c333b 243 if(evt.status != osEventMail)
donatien 0:3b2f052c333b 244 {
donatien 0:3b2f052c333b 245 //Cancel request
donatien 0:3b2f052c333b 246 msg = m_env2AT.alloc(osWaitForever);
donatien 0:3b2f052c333b 247 *msg = AT_TIMEOUT;
donatien 0:3b2f052c333b 248 m_env2AT.put(msg);
donatien 0:3b2f052c333b 249
donatien 0:3b2f052c333b 250 DBG("Trying to enter abortRead()");
donatien 0:3b2f052c333b 251 //Unlock process routine (abort read)
donatien 0:3b2f052c333b 252 m_pStream->abortRead(); //This is thread-safe
donatien 0:3b2f052c333b 253
donatien 0:3b2f052c333b 254 WARN("Command returned no message");
donatien 0:3b2f052c333b 255 return NET_TIMEOUT;
donatien 0:3b2f052c333b 256 }
donatien 0:3b2f052c333b 257 DBG("Command returned with message %d", *msg);
donatien 0:3b2f052c333b 258
donatien 0:3b2f052c333b 259 m_AT2Env.free((int*)evt.value.p);
donatien 0:3b2f052c333b 260
donatien 0:3b2f052c333b 261 if(pResult != NULL)
donatien 0:3b2f052c333b 262 {
donatien 0:3b2f052c333b 263 *pResult = m_transactionResult;
donatien 0:3b2f052c333b 264 }
donatien 0:3b2f052c333b 265
donatien 0:3b2f052c333b 266 int ret = ATResultToReturnCode(m_transactionResult);
donatien 0:3b2f052c333b 267 if(ret != OK)
donatien 0:3b2f052c333b 268 {
donatien 0:3b2f052c333b 269 WARN("Command returned AT result %d with code %d", m_transactionResult.result, m_transactionResult.code);
donatien 0:3b2f052c333b 270 }
donatien 0:3b2f052c333b 271
donatien 0:3b2f052c333b 272 DBG("Command returned successfully");
donatien 0:3b2f052c333b 273
donatien 0:3b2f052c333b 274 return ret;
donatien 0:3b2f052c333b 275 }
donatien 59:593fb493172f 276 #include "mbed.h"
donatien 59:593fb493172f 277 DigitalOut led_test(LED4);
donatien 0:3b2f052c333b 278
donatien 0:3b2f052c333b 279 int ATCommandsInterface::tryReadLine()
donatien 0:3b2f052c333b 280 {
donatien 0:3b2f052c333b 281 static bool lineDetected = false;
donatien 0:3b2f052c333b 282
donatien 0:3b2f052c333b 283 //Block on serial read or incoming command
donatien 0:3b2f052c333b 284 DBG("Trying to read a new line from stream");
donatien 59:593fb493172f 285 led_test=1;
donatien 0:3b2f052c333b 286 int ret = m_pStream->waitAvailable(); //This can be aborted
donatien 0:3b2f052c333b 287 size_t readLen = 0;
donatien 0:3b2f052c333b 288 if(ret == OK)
donatien 0:3b2f052c333b 289 {
donatien 0:3b2f052c333b 290 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 0:3b2f052c333b 291 }
donatien 59:593fb493172f 292 led_test=0;
donatien 0:3b2f052c333b 293 if(ret == OK)
donatien 0:3b2f052c333b 294 {
donatien 0:3b2f052c333b 295 m_inputPos+=readLen;
donatien 0:3b2f052c333b 296 m_inputBuf[m_inputPos] = '\0'; //Add null terminating character to ease the use of str* functions
donatien 0:3b2f052c333b 297 DBG("In buffer: [%s]", m_inputBuf);
donatien 0:3b2f052c333b 298 }
donatien 0:3b2f052c333b 299
donatien 0:3b2f052c333b 300 if( ret == NET_INTERRUPTED ) //It is worth checking readLen as data might have been read even though the read was interrupted
donatien 0:3b2f052c333b 301 {
donatien 0:3b2f052c333b 302 DBG("Read was interrupted");
donatien 0:3b2f052c333b 303 return NET_INTERRUPTED; //0 chars were read
donatien 0:3b2f052c333b 304 }
donatien 0:3b2f052c333b 305 else if(readLen == 0)
donatien 0:3b2f052c333b 306 {
donatien 0:3b2f052c333b 307 DBG("Nothing read");
donatien 0:3b2f052c333b 308 return OK; //0 chars were read
donatien 0:3b2f052c333b 309 }
donatien 0:3b2f052c333b 310
donatien 0:3b2f052c333b 311 DBG("Trying to process incoming line");
donatien 0:3b2f052c333b 312 bool lineProcessed = false;
donatien 0:3b2f052c333b 313
donatien 0:3b2f052c333b 314 do
donatien 0:3b2f052c333b 315 {
donatien 0:3b2f052c333b 316 lineProcessed = false; //Reset flag
donatien 0:3b2f052c333b 317
donatien 0:3b2f052c333b 318 DBG("New iteration");
donatien 0:3b2f052c333b 319
donatien 0:3b2f052c333b 320 //Look for a new line
donatien 0:3b2f052c333b 321 if(!lineDetected)
donatien 0:3b2f052c333b 322 {
donatien 0:3b2f052c333b 323 DBG("No line detected yet");
donatien 0:3b2f052c333b 324 //Try to look for a starting CRLF
donatien 0:3b2f052c333b 325 char* crPtr = strchr(m_inputBuf, CR);
donatien 0:3b2f052c333b 326 /*
donatien 0:3b2f052c333b 327 Different cases at this point:
donatien 0:3b2f052c333b 328 - CRLF%c sequence: this is the start of a line
donatien 0:3b2f052c333b 329 - CRLFCR(LF) sequence: this is the end of a line (followed by the beginning of the next one)
donatien 0:3b2f052c333b 330 - LF: this is the trailing LF char of the previous line, discard
donatien 0:3b2f052c333b 331 - CR / CRLF incomplete sequence: more data is needed to determine which action to take
donatien 0:3b2f052c333b 332 - %c ... CR sequence: this should be the echo of the previous sequence
donatien 0:3b2f052c333b 333 - %c sequence: This might be the echo of the previous command; more data is needed to determine which action to take
donatien 0:3b2f052c333b 334
donatien 0:3b2f052c333b 335 In every case, move mem at the beginning
donatien 0:3b2f052c333b 336 */
donatien 0:3b2f052c333b 337 if(crPtr != NULL)
donatien 0:3b2f052c333b 338 {
donatien 0:3b2f052c333b 339 DBG("CR char found");
donatien 0:3b2f052c333b 340
donatien 0:3b2f052c333b 341 #if 0
donatien 0:3b2f052c333b 342 //Discard all preceding characters (can do nothing if m_inputBuf == crPtr)
donatien 0:3b2f052c333b 343 memmove(m_inputBuf, crPtr, (m_inputPos + 1) - (crPtr-m_inputBuf)); //Move null-terminating char as well
donatien 0:3b2f052c333b 344 m_inputPos = m_inputPos - (crPtr-m_inputBuf); //Adjust m_inputPos
donatien 0:3b2f052c333b 345 #endif
donatien 0:3b2f052c333b 346
donatien 0:3b2f052c333b 347 //If the line starts with CR, this should be a result code
donatien 0:3b2f052c333b 348 if( crPtr == m_inputBuf )
donatien 0:3b2f052c333b 349 {
donatien 0:3b2f052c333b 350 //To determine the sequence we need at least 3 chars
donatien 0:3b2f052c333b 351 if(m_inputPos >= 3)
donatien 0:3b2f052c333b 352 {
donatien 0:3b2f052c333b 353 //Look for a LF char next to the CR char
donatien 0:3b2f052c333b 354 if(m_inputBuf[1] == LF)
donatien 0:3b2f052c333b 355 {
donatien 0:3b2f052c333b 356 //At this point we can check whether this is the end of a preceding line or the beginning of a new one
donatien 0:3b2f052c333b 357 if(m_inputBuf[2] != CR)
donatien 0:3b2f052c333b 358 {
donatien 0:3b2f052c333b 359 DBG("Beginning of new line found");
donatien 0:3b2f052c333b 360 //Beginning of a line
donatien 0:3b2f052c333b 361 lineDetected = true; //Move to next state-machine step
donatien 0:3b2f052c333b 362 }
donatien 0:3b2f052c333b 363 else
donatien 0:3b2f052c333b 364 {
donatien 0:3b2f052c333b 365 //End of an unprocessed line
donatien 0:3b2f052c333b 366 WARN("End of unprocessed line");
donatien 0:3b2f052c333b 367 }
donatien 0:3b2f052c333b 368 //In both cases discard CRLF
donatien 0:3b2f052c333b 369 DBG("Discarding CRLF");
donatien 0:3b2f052c333b 370 memmove(m_inputBuf, m_inputBuf + 2, (m_inputPos + 1) - 2); //Move null-terminating char as well
donatien 0:3b2f052c333b 371 m_inputPos = m_inputPos - 2; //Adjust m_inputPos
donatien 0:3b2f052c333b 372 }
donatien 0:3b2f052c333b 373 else
donatien 0:3b2f052c333b 374 {
donatien 0:3b2f052c333b 375 //This is completely unexpected, discard the CR char to try to recover good state
donatien 0:3b2f052c333b 376 WARN("Unexpected %c char (%02d code) found after CR char", m_inputBuf[1]);
donatien 0:3b2f052c333b 377 memmove(m_inputBuf, m_inputBuf + 1, (m_inputPos + 1) - 1); //Move null-terminating char as well
donatien 0:3b2f052c333b 378 m_inputPos = m_inputPos - 1; //Adjust m_inputPos
donatien 0:3b2f052c333b 379 }
donatien 0:3b2f052c333b 380 }
donatien 0:3b2f052c333b 381 }
donatien 0:3b2f052c333b 382 //if the line does NOT begin with CR, this can be an echo of the previous command, process it
donatien 0:3b2f052c333b 383 else
donatien 0:3b2f052c333b 384 {
donatien 0:3b2f052c333b 385 int crPos = crPtr - m_inputBuf;
donatien 0:3b2f052c333b 386 int lfOff = 0; //Offset for LF if present
donatien 0:3b2f052c333b 387 DBG("New line found (possible echo of command)");
donatien 0:3b2f052c333b 388 //This is the end of line
donatien 0:3b2f052c333b 389 //Replace m_inputBuf[crPos] with null-terminating char
donatien 0:3b2f052c333b 390 m_inputBuf[crPos] = '\0';
donatien 0:3b2f052c333b 391 //Check if there is a LF char afterwards
donatien 0:3b2f052c333b 392 if(m_inputPos - crPos >= 1)
donatien 0:3b2f052c333b 393 {
donatien 0:3b2f052c333b 394 if(m_inputBuf[crPos+1] == LF)
donatien 0:3b2f052c333b 395 {
donatien 0:3b2f052c333b 396 lfOff++; //We will discard LF char as well
donatien 0:3b2f052c333b 397 }
donatien 0:3b2f052c333b 398 }
donatien 0:3b2f052c333b 399 //Process line
donatien 51:54ca82a7644c 400 int ret = processReadLine();
donatien 51:54ca82a7644c 401 if(ret)
donatien 51:54ca82a7644c 402 {
donatien 51:54ca82a7644c 403 m_inputPos = 0;
donatien 51:54ca82a7644c 404 m_inputBuf[0] = '\0'; //Always have a null-terminating char at start of buffer
donatien 51:54ca82a7644c 405 lineDetected = false;
donatien 51:54ca82a7644c 406 return ret;
donatien 51:54ca82a7644c 407 }
donatien 51:54ca82a7644c 408
donatien 51:54ca82a7644c 409 //If sendData has been called, all incoming data has been discarded
donatien 51:54ca82a7644c 410 if(m_inputPos > 0)
donatien 51:54ca82a7644c 411 {
donatien 51:54ca82a7644c 412 memmove(m_inputBuf, m_inputBuf + crPos + lfOff + 1, (m_inputPos + 1) - (crPos + lfOff + 1)); //Move null-terminating char as well
donatien 51:54ca82a7644c 413 m_inputPos = m_inputPos - (crPos + lfOff + 1); //Adjust m_inputPos
donatien 51:54ca82a7644c 414 }
donatien 0:3b2f052c333b 415 DBG("One line was successfully processed");
donatien 0:3b2f052c333b 416 lineProcessed = true; //Line was processed with success
donatien 0:3b2f052c333b 417 lineDetected = false; //Search now for a new line
donatien 0:3b2f052c333b 418 }
donatien 0:3b2f052c333b 419 }
donatien 0:3b2f052c333b 420 else if(m_inputBuf[0] == LF) //If there is a remaining LF char from the previous line, discard it
donatien 0:3b2f052c333b 421 {
donatien 0:3b2f052c333b 422 DBG("Discarding single LF char");
donatien 0:3b2f052c333b 423 memmove(m_inputBuf, m_inputBuf + 1, (m_inputPos + 1) - 1); //Move null-terminating char as well
donatien 0:3b2f052c333b 424 m_inputPos = m_inputPos - 1; //Adjust m_inputPos
donatien 0:3b2f052c333b 425 }
donatien 0:3b2f052c333b 426 }
donatien 0:3b2f052c333b 427
donatien 0:3b2f052c333b 428 //Look for the end of line
donatien 0:3b2f052c333b 429 if(lineDetected)
donatien 0:3b2f052c333b 430 {
donatien 0:3b2f052c333b 431 DBG("Looking for end of line");
donatien 0:3b2f052c333b 432 //Try to look for a terminating CRLF
donatien 0:3b2f052c333b 433 char* crPtr = strchr(m_inputBuf, CR);
donatien 0:3b2f052c333b 434 /*
donatien 0:3b2f052c333b 435 Different cases at this point:
donatien 0:3b2f052c333b 436 - CRLF sequence: this is the end of the line
donatien 0:3b2f052c333b 437 - CR%c sequence : unexpected
donatien 0:3b2f052c333b 438 - CR incomplete sequence: more data is needed to determine which action to take
donatien 0:3b2f052c333b 439 */
donatien 0:3b2f052c333b 440
donatien 0:3b2f052c333b 441 //Try to look for a '>' (greater than character) that marks an entry prompt
donatien 0:3b2f052c333b 442 char* greaterThanPtr = strchr(m_inputBuf, GD);
donatien 0:3b2f052c333b 443 /*
donatien 0:3b2f052c333b 444 This character must be detected as there is no CRLF sequence at the end of an entry prompt
donatien 0:3b2f052c333b 445 */
donatien 0:3b2f052c333b 446
donatien 0:3b2f052c333b 447 if(crPtr != NULL)
donatien 0:3b2f052c333b 448 {
donatien 0:3b2f052c333b 449 DBG("CR char found");
donatien 0:3b2f052c333b 450 int crPos = crPtr - m_inputBuf;
donatien 0:3b2f052c333b 451 //To determine the sequence we need at least 2 chars
donatien 0:3b2f052c333b 452 if(m_inputPos - crPos >= 2)
donatien 0:3b2f052c333b 453 {
donatien 0:3b2f052c333b 454 //Look for a LF char next to the CR char
donatien 0:3b2f052c333b 455 if(m_inputBuf[crPos + 1] == LF)
donatien 0:3b2f052c333b 456 {
donatien 0:3b2f052c333b 457 DBG("End of new line found");
donatien 0:3b2f052c333b 458 //This is the end of line
donatien 0:3b2f052c333b 459 //Replace m_inputBuf[crPos] with null-terminating char
donatien 0:3b2f052c333b 460 m_inputBuf[crPos] = '\0';
donatien 0:3b2f052c333b 461 //Process line
donatien 0:3b2f052c333b 462 int ret = processReadLine();
donatien 0:3b2f052c333b 463 if(ret)
donatien 0:3b2f052c333b 464 {
donatien 0:3b2f052c333b 465 m_inputPos = 0;
donatien 51:54ca82a7644c 466 m_inputBuf[0] = '\0'; //Always have a null-terminating char at start of buffer
donatien 0:3b2f052c333b 467 lineDetected = false;
donatien 0:3b2f052c333b 468 return ret;
donatien 0:3b2f052c333b 469 }
donatien 0:3b2f052c333b 470
donatien 0:3b2f052c333b 471 //If sendData has been called, all incoming data has been discarded
donatien 0:3b2f052c333b 472 if(m_inputPos > 0)
donatien 0:3b2f052c333b 473 {
donatien 0:3b2f052c333b 474 //Shift remaining data to beginning of buffer
donatien 0:3b2f052c333b 475 memmove(m_inputBuf, m_inputBuf + crPos + 2, (m_inputPos + 1) - (crPos + 2)); //Move null-terminating char as well
donatien 0:3b2f052c333b 476 m_inputPos = m_inputPos - (crPos + 2); //Adjust m_inputPos
donatien 0:3b2f052c333b 477 }
donatien 0:3b2f052c333b 478
donatien 0:3b2f052c333b 479 DBG("One line was successfully processed");
donatien 0:3b2f052c333b 480 lineProcessed = true; //Line was processed with success
donatien 0:3b2f052c333b 481 }
donatien 0:3b2f052c333b 482 else
donatien 0:3b2f052c333b 483 {
donatien 0:3b2f052c333b 484 //This is completely unexpected, discard all chars till the CR char to try to recover good state
donatien 0:3b2f052c333b 485 WARN("Unexpected %c char (%02d code) found in incoming line", m_inputBuf[crPos + 1]);
donatien 0:3b2f052c333b 486 memmove(m_inputBuf, m_inputBuf + crPos + 1, (m_inputPos + 1) - (crPos + 1)); //Move null-terminating char as well
donatien 0:3b2f052c333b 487 m_inputPos = m_inputPos - (crPos + 1); //Adjust m_inputPos
donatien 0:3b2f052c333b 488 }
donatien 0:3b2f052c333b 489 lineDetected = false; //In both case search now for a new line
donatien 0:3b2f052c333b 490 }
donatien 0:3b2f052c333b 491 }
donatien 0:3b2f052c333b 492 else if(greaterThanPtr != NULL)
donatien 0:3b2f052c333b 493 {
donatien 0:3b2f052c333b 494 DBG("> char found");
donatien 0:3b2f052c333b 495 int gdPos = greaterThanPtr - m_inputBuf;
donatien 0:3b2f052c333b 496 //To determine the sequence we need at least 2 chars
donatien 0:3b2f052c333b 497 if(m_inputPos - gdPos >= 2)
donatien 0:3b2f052c333b 498 {
donatien 0:3b2f052c333b 499 //Look for a space char next to the GD char
donatien 0:3b2f052c333b 500 if(m_inputBuf[gdPos + 1] == ' ')
donatien 0:3b2f052c333b 501 {
donatien 0:3b2f052c333b 502 //This is an entry prompt
donatien 0:3b2f052c333b 503 //Replace m_inputBuf[gdPos] with null-terminating char
donatien 0:3b2f052c333b 504 m_inputBuf[gdPos] = '\0';
donatien 0:3b2f052c333b 505
donatien 0:3b2f052c333b 506 //Shift remaining data to beginning of buffer
donatien 0:3b2f052c333b 507 memmove(m_inputBuf, m_inputBuf + gdPos + 1, (m_inputPos + 1) - (gdPos + 1)); //Move null-terminating char as well
donatien 0:3b2f052c333b 508 m_inputPos = m_inputPos - (gdPos + 1); //Adjust m_inputPos
donatien 0:3b2f052c333b 509
donatien 0:3b2f052c333b 510 //Process prompt
donatien 0:3b2f052c333b 511 ret = processEntryPrompt();
donatien 0:3b2f052c333b 512 if(ret)
donatien 0:3b2f052c333b 513 {
donatien 0:3b2f052c333b 514 m_inputPos = 0;
donatien 51:54ca82a7644c 515 m_inputBuf[0] = '\0'; //Always have a null-terminating char at start of buffer
donatien 0:3b2f052c333b 516 lineDetected = false;
donatien 0:3b2f052c333b 517 return ret;
donatien 0:3b2f052c333b 518 }
donatien 0:3b2f052c333b 519
donatien 0:3b2f052c333b 520 DBG("One line was successfully processed");
donatien 0:3b2f052c333b 521 lineProcessed = true; //Line was processed with success
donatien 0:3b2f052c333b 522 }
donatien 0:3b2f052c333b 523 else
donatien 0:3b2f052c333b 524 {
donatien 0:3b2f052c333b 525 //This is completely unexpected, discard all chars till the GD char to try to recover good state
donatien 0:3b2f052c333b 526 WARN("Unexpected %c char (%02d code) found in incoming line", m_inputBuf[gdPos + 1]);
donatien 0:3b2f052c333b 527 memmove(m_inputBuf, m_inputBuf + gdPos + 1, (m_inputPos + 1) - (gdPos + 1)); //Move null-terminating char as well
donatien 0:3b2f052c333b 528 m_inputPos = m_inputPos - (gdPos + 1); //Adjust m_inputPos
donatien 0:3b2f052c333b 529 }
donatien 0:3b2f052c333b 530 lineDetected = false; //In both case search now for a new line
donatien 0:3b2f052c333b 531 }
donatien 0:3b2f052c333b 532 }
donatien 0:3b2f052c333b 533 }
donatien 0:3b2f052c333b 534 } 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 0:3b2f052c333b 535
donatien 0:3b2f052c333b 536 //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 0:3b2f052c333b 537 if(m_inputPos == AT_INPUT_BUF_SIZE - 1)
donatien 0:3b2f052c333b 538 {
donatien 0:3b2f052c333b 539 //Discard everything
donatien 0:3b2f052c333b 540 m_inputPos = 0;
donatien 51:54ca82a7644c 541 m_inputBuf[0] = '\0'; //Always have a null-terminating char at start of buffer
donatien 0:3b2f052c333b 542 WARN("Incoming buffer is too short to process incoming line");
donatien 0:3b2f052c333b 543 //Look for a new line
donatien 0:3b2f052c333b 544 lineDetected = false;
donatien 0:3b2f052c333b 545 }
donatien 0:3b2f052c333b 546
donatien 0:3b2f052c333b 547 DBG("Processed every full incoming lines");
donatien 0:3b2f052c333b 548
donatien 0:3b2f052c333b 549 return OK;
donatien 0:3b2f052c333b 550 }
donatien 0:3b2f052c333b 551
donatien 0:3b2f052c333b 552 int ATCommandsInterface::trySendCommand()
donatien 0:3b2f052c333b 553 {
donatien 0:3b2f052c333b 554 osEvent evt = m_env2AT.get(0);
donatien 0:3b2f052c333b 555 DBG("status = %d, msg = %d", evt.status, evt.value.p);
donatien 0:3b2f052c333b 556 if(evt.status == osEventMail)
donatien 0:3b2f052c333b 557 {
donatien 0:3b2f052c333b 558 int* msg = (int*) evt.value.p;
donatien 0:3b2f052c333b 559 if( *msg == AT_CMD_READY ) //Command pending
donatien 0:3b2f052c333b 560 {
donatien 0:3b2f052c333b 561 if(m_transactionState != IDLE)
donatien 0:3b2f052c333b 562 {
donatien 0:3b2f052c333b 563 WARN("Previous command not processed!");
donatien 0:3b2f052c333b 564 }
donatien 0:3b2f052c333b 565 DBG("Sending pending command");
donatien 0:3b2f052c333b 566 m_pStream->write((uint8_t*)m_transactionCommand, strlen(m_transactionCommand), osWaitForever);
donatien 0:3b2f052c333b 567 char cr = CR;
donatien 0:3b2f052c333b 568 m_pStream->write((uint8_t*)&cr, 1, osWaitForever); //Carriage return line terminator
donatien 0:3b2f052c333b 569 m_transactionState = COMMAND_SENT;
donatien 0:3b2f052c333b 570 }
donatien 0:3b2f052c333b 571 else
donatien 0:3b2f052c333b 572 {
donatien 0:3b2f052c333b 573 m_transactionState = IDLE; //State-machine reset
donatien 0:3b2f052c333b 574 }
donatien 0:3b2f052c333b 575 m_env2AT.free(msg);
donatien 0:3b2f052c333b 576 }
donatien 0:3b2f052c333b 577 return OK;
donatien 0:3b2f052c333b 578 }
donatien 0:3b2f052c333b 579
donatien 0:3b2f052c333b 580 int ATCommandsInterface::processReadLine()
donatien 0:3b2f052c333b 581 {
donatien 0:3b2f052c333b 582 DBG("Processing read line [%s]", m_inputBuf);
donatien 0:3b2f052c333b 583 //The line is stored in m_inputBuf
donatien 0:3b2f052c333b 584 if(m_transactionState == COMMAND_SENT)
donatien 0:3b2f052c333b 585 {
donatien 0:3b2f052c333b 586 //If the command has been sent, checks echo to see if it has been received properly
donatien 0:3b2f052c333b 587 if( strcmp(m_transactionCommand, m_inputBuf) == 0 )
donatien 0:3b2f052c333b 588 {
donatien 0:3b2f052c333b 589 DBG("Command echo received");
donatien 0:3b2f052c333b 590 //If so, it means that the following lines will only be solicited results
donatien 0:3b2f052c333b 591 m_transactionState = READING_RESULT;
donatien 0:3b2f052c333b 592 return OK;
donatien 0:3b2f052c333b 593 }
donatien 0:3b2f052c333b 594 }
donatien 0:3b2f052c333b 595 if(m_transactionState == IDLE || m_transactionState == COMMAND_SENT)
donatien 0:3b2f052c333b 596 {
donatien 0:3b2f052c333b 597 bool found = false;
donatien 0:3b2f052c333b 598 char* pSemicol = strchr(m_inputBuf, ':');
donatien 0:3b2f052c333b 599 char* pData = NULL;
donatien 0:3b2f052c333b 600 if( pSemicol != NULL ) //Split the identifier & the result code (if it exists)
donatien 0:3b2f052c333b 601 {
donatien 0:3b2f052c333b 602 *pSemicol = '\0';
donatien 0:3b2f052c333b 603 pData = pSemicol + 1;
donatien 0:3b2f052c333b 604 if(pData[0]==' ')
donatien 0:3b2f052c333b 605 {
donatien 0:3b2f052c333b 606 pData++; //Suppress whitespace
donatien 0:3b2f052c333b 607 }
donatien 0:3b2f052c333b 608 }
donatien 0:3b2f052c333b 609 //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 59:593fb493172f 610 m_eventsProcessingMtx.lock();
donatien 0:3b2f052c333b 611 //Go through the list
donatien 0:3b2f052c333b 612 for(int i = 0; i < MAX_AT_EVENTS_HANDLERS; i++) //Find a free slot
donatien 0:3b2f052c333b 613 {
donatien 0:3b2f052c333b 614 if( m_eventsHandlers[i] != NULL )
donatien 0:3b2f052c333b 615 {
donatien 0:3b2f052c333b 616 if( m_eventsHandlers[i]->isATCodeHandled(m_inputBuf) )
donatien 0:3b2f052c333b 617 {
donatien 0:3b2f052c333b 618 m_eventsHandlers[i]->onEvent(m_inputBuf, pData);
donatien 0:3b2f052c333b 619 found = true; //Do not break here as there might be multiple handlers for one event type
donatien 0:3b2f052c333b 620 }
donatien 0:3b2f052c333b 621 }
donatien 0:3b2f052c333b 622 }
donatien 59:593fb493172f 623 m_eventsProcessingMtx.unlock();
donatien 0:3b2f052c333b 624 if(found)
donatien 0:3b2f052c333b 625 {
donatien 0:3b2f052c333b 626 return OK;
donatien 0:3b2f052c333b 627 }
donatien 0:3b2f052c333b 628 }
donatien 0:3b2f052c333b 629 if(m_transactionState == READING_RESULT)
donatien 0:3b2f052c333b 630 {
donatien 0:3b2f052c333b 631 //The following lines can either be a command response or a result code (OK / ERROR / CONNECT / +CME ERROR: %s / +CMS ERROR: %s)
donatien 0:3b2f052c333b 632 if(strcmp("OK", m_inputBuf) == 0)
donatien 0:3b2f052c333b 633 {
donatien 0:3b2f052c333b 634 DBG("OK result received");
donatien 0:3b2f052c333b 635 m_transactionResult.code = 0;
donatien 0:3b2f052c333b 636 m_transactionResult.result = ATResult::AT_OK;
donatien 0:3b2f052c333b 637 m_transactionState = IDLE;
donatien 0:3b2f052c333b 638 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:3b2f052c333b 639 *msg = AT_RESULT_READY;
donatien 0:3b2f052c333b 640 m_AT2Env.put(msg); //Command has been processed
donatien 0:3b2f052c333b 641 return OK;
donatien 0:3b2f052c333b 642 }
donatien 0:3b2f052c333b 643 else if(strcmp("ERROR", m_inputBuf) == 0)
donatien 0:3b2f052c333b 644 {
donatien 0:3b2f052c333b 645 DBG("ERROR result received");
donatien 0:3b2f052c333b 646 m_transactionResult.code = 0;
donatien 0:3b2f052c333b 647 m_transactionResult.result = ATResult::AT_ERROR;
donatien 0:3b2f052c333b 648 m_transactionState = IDLE;
donatien 0:3b2f052c333b 649 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:3b2f052c333b 650 *msg = AT_RESULT_READY;
donatien 0:3b2f052c333b 651 m_AT2Env.put(msg); //Command has been processed
donatien 0:3b2f052c333b 652 return OK;
donatien 0:3b2f052c333b 653 }
donatien 0:3b2f052c333b 654 else if(strncmp("CONNECT", m_inputBuf, 7 /*=strlen("CONNECT")*/) == 0) //Result can be "CONNECT" or "CONNECT %d", indicating baudrate
donatien 0:3b2f052c333b 655 {
donatien 0:3b2f052c333b 656 DBG("CONNECT result received");
donatien 0:3b2f052c333b 657 m_transactionResult.code = 0;
donatien 0:3b2f052c333b 658 m_transactionResult.result = ATResult::AT_CONNECT;
donatien 0:3b2f052c333b 659 m_transactionState = IDLE;
donatien 0:3b2f052c333b 660 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:3b2f052c333b 661 *msg = AT_RESULT_READY;
donatien 0:3b2f052c333b 662 m_AT2Env.put(msg); //Command has been processed
donatien 0:3b2f052c333b 663 return OK;
donatien 0:3b2f052c333b 664 }
donatien 0:3b2f052c333b 665 else if(strcmp("COMMAND NOT SUPPORT", m_inputBuf) == 0) //Huawei-specific, not normalized
donatien 0:3b2f052c333b 666 {
donatien 0:3b2f052c333b 667 DBG("COMMAND NOT SUPPORT result received");
donatien 0:3b2f052c333b 668 m_transactionResult.code = 0;
donatien 0:3b2f052c333b 669 m_transactionResult.result = ATResult::AT_ERROR;
donatien 0:3b2f052c333b 670 m_transactionState = IDLE;
donatien 0:3b2f052c333b 671 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:3b2f052c333b 672 *msg = AT_RESULT_READY;
donatien 0:3b2f052c333b 673 m_AT2Env.put(msg); //Command has been processed
donatien 0:3b2f052c333b 674 return OK;
donatien 0:3b2f052c333b 675 }
donatien 0:3b2f052c333b 676 else if(strstr(m_inputBuf, "+CME ERROR:") == m_inputBuf) //Mobile Equipment Error
donatien 0:3b2f052c333b 677 {
donatien 0:3b2f052c333b 678 std::sscanf(m_inputBuf + 12 /* =strlen("+CME ERROR: ") */, "%d", &m_transactionResult.code);
donatien 0:3b2f052c333b 679 DBG("+CME ERROR: %d result received", m_transactionResult.code);
donatien 0:3b2f052c333b 680 m_transactionResult.result = ATResult::AT_CME_ERROR;
donatien 0:3b2f052c333b 681 m_transactionState = IDLE;
donatien 0:3b2f052c333b 682 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:3b2f052c333b 683 *msg = AT_RESULT_READY;
donatien 0:3b2f052c333b 684 m_AT2Env.put(msg); //Command has been processed
donatien 0:3b2f052c333b 685 return OK;
donatien 0:3b2f052c333b 686 }
donatien 0:3b2f052c333b 687 else if(strstr(m_inputBuf, "+CMS ERROR:") == m_inputBuf) //SIM Error
donatien 0:3b2f052c333b 688 {
donatien 0:3b2f052c333b 689 std::sscanf(m_inputBuf + 13 /* =strlen("+CME ERROR: ") */, "%d", &m_transactionResult.code);
donatien 0:3b2f052c333b 690 DBG("+CMS ERROR: %d result received", m_transactionResult.code);
donatien 0:3b2f052c333b 691 m_transactionResult.result = ATResult::AT_CMS_ERROR;
donatien 0:3b2f052c333b 692 m_transactionState = IDLE;
donatien 0:3b2f052c333b 693 int* msg = m_AT2Env.alloc(osWaitForever);
donatien 0:3b2f052c333b 694 *msg = AT_RESULT_READY;
donatien 0:3b2f052c333b 695 m_AT2Env.put(msg); //Command has been processed
donatien 0:3b2f052c333b 696 return OK;
donatien 0:3b2f052c333b 697 }
donatien 0:3b2f052c333b 698 else
donatien 0:3b2f052c333b 699 {
donatien 0:3b2f052c333b 700 DBG("Unprocessed result received: '%s'", m_inputBuf);
donatien 0:3b2f052c333b 701 //Must call transaction processor to complete line processing
donatien 0:3b2f052c333b 702 int ret = m_pTransactionProcessor->onNewATResponseLine(this, m_inputBuf); //Here sendData can be called
donatien 0:3b2f052c333b 703 return ret;
donatien 0:3b2f052c333b 704 }
donatien 0:3b2f052c333b 705 }
donatien 0:3b2f052c333b 706
donatien 0:3b2f052c333b 707 return OK;
donatien 0:3b2f052c333b 708 }
donatien 0:3b2f052c333b 709
donatien 0:3b2f052c333b 710 int ATCommandsInterface::processEntryPrompt()
donatien 0:3b2f052c333b 711 {
donatien 0:3b2f052c333b 712 DBG("Calling prompt handler");
donatien 0:3b2f052c333b 713 int ret = m_pTransactionProcessor->onNewEntryPrompt(this); //Here sendData can be called
donatien 0:3b2f052c333b 714
donatien 0:3b2f052c333b 715 if( ret != NET_MOREINFO ) //A new prompt is expected
donatien 0:3b2f052c333b 716 {
donatien 0:3b2f052c333b 717 DBG("Sending break character");
donatien 0:3b2f052c333b 718 //Send CTRL+Z (break sequence) to exit prompt
donatien 0:3b2f052c333b 719 char seq[2] = {BRK, 0x00};
donatien 0:3b2f052c333b 720 sendData(seq);
donatien 0:3b2f052c333b 721 }
donatien 0:3b2f052c333b 722 return OK;
donatien 0:3b2f052c333b 723 }
donatien 0:3b2f052c333b 724
donatien 59:593fb493172f 725 //This will be called on initialization & after the execution of a command
donatien 59:593fb493172f 726 void ATCommandsInterface::enableEvents()
donatien 59:593fb493172f 727 {
donatien 59:593fb493172f 728 //Advertize this to events handlers
donatien 59:593fb493172f 729 m_eventsMgmtMtx.lock();
donatien 59:593fb493172f 730 for(int i = 0; i < MAX_AT_EVENTS_HANDLERS; i++) //Find a free slot
donatien 59:593fb493172f 731 {
donatien 59:593fb493172f 732 if( m_eventsHandlers[i] != NULL )
donatien 59:593fb493172f 733 {
donatien 59:593fb493172f 734 m_eventsHandlers[i]->onDispatchStart();
donatien 59:593fb493172f 735 //Enable this kind of events
donatien 59:593fb493172f 736 if(m_eventsHandlers[i]->getEventsEnableCommand() != NULL)
donatien 59:593fb493172f 737 {
donatien 59:593fb493172f 738 int ret = executeInternal(m_eventsHandlers[i]->getEventsEnableCommand(), this, NULL); //Execute enable command
donatien 59:593fb493172f 739 if(ret)
donatien 59:593fb493172f 740 {
donatien 59:593fb493172f 741 WARN("Events enabling command failed");
donatien 59:593fb493172f 742 }
donatien 59:593fb493172f 743 }
donatien 59:593fb493172f 744 }
donatien 59:593fb493172f 745 }
donatien 59:593fb493172f 746 m_eventsMgmtMtx.unlock();
donatien 59:593fb493172f 747 }
donatien 59:593fb493172f 748
donatien 59:593fb493172f 749 //This will be called on de-initialization & before the execution of a command to prevent unsollicited result codes from polluting the results
donatien 59:593fb493172f 750 void ATCommandsInterface::disableEvents()
donatien 59:593fb493172f 751 {
donatien 59:593fb493172f 752 //Advertize this to events handlers
donatien 59:593fb493172f 753 m_eventsMgmtMtx.lock();
donatien 59:593fb493172f 754 for(int i = 0; i < MAX_AT_EVENTS_HANDLERS; i++) //Find a free slot
donatien 59:593fb493172f 755 {
donatien 59:593fb493172f 756 if( m_eventsHandlers[i] != NULL )
donatien 59:593fb493172f 757 {
donatien 59:593fb493172f 758 m_eventsHandlers[i]->onDispatchStart();
donatien 59:593fb493172f 759 //Disable this kind of events
donatien 59:593fb493172f 760 if(m_eventsHandlers[i]->getEventsDisableCommand() != NULL)
donatien 59:593fb493172f 761 {
donatien 59:593fb493172f 762 int ret = executeInternal(m_eventsHandlers[i]->getEventsDisableCommand(), this, NULL); //Execute disable command
donatien 59:593fb493172f 763 if(ret)
donatien 59:593fb493172f 764 {
donatien 59:593fb493172f 765 WARN("Events disabling command failed");
donatien 59:593fb493172f 766 }
donatien 59:593fb493172f 767 }
donatien 59:593fb493172f 768 }
donatien 59:593fb493172f 769 }
donatien 59:593fb493172f 770 m_eventsMgmtMtx.unlock();
donatien 59:593fb493172f 771 }
donatien 59:593fb493172f 772
donatien 0:3b2f052c333b 773 //Commands that can be called during onNewATResponseLine callback, additionally to close()
donatien 0:3b2f052c333b 774 //Access to this method is protected (can ONLY be called on processing thread during IATCommandsProcessor::onNewATResponseLine execution)
donatien 0:3b2f052c333b 775 int ATCommandsInterface::sendData(const char* data)
donatien 0:3b2f052c333b 776 {
donatien 0:3b2f052c333b 777 //m_inputBuf is cleared at this point (and MUST therefore be empty)
donatien 0:3b2f052c333b 778 int dataLen = strlen(data);
donatien 0:3b2f052c333b 779 DBG("Sending raw string of length %d", dataLen);
donatien 0:3b2f052c333b 780 int ret = m_pStream->write((uint8_t*)data, dataLen, osWaitForever);
donatien 0:3b2f052c333b 781 if(ret)
donatien 0:3b2f052c333b 782 {
donatien 0:3b2f052c333b 783 WARN("Could not write to stream (returned %d)", ret);
donatien 0:3b2f052c333b 784 return ret;
donatien 0:3b2f052c333b 785 }
donatien 0:3b2f052c333b 786
donatien 0:3b2f052c333b 787 int dataPos = 0;
donatien 0:3b2f052c333b 788 do
donatien 0:3b2f052c333b 789 {
donatien 0:3b2f052c333b 790 //Read echo
donatien 0:3b2f052c333b 791 size_t readLen;
donatien 0:3b2f052c333b 792 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 0:3b2f052c333b 793 if(ret)
donatien 0:3b2f052c333b 794 {
donatien 0:3b2f052c333b 795 WARN("Could not read from stream (returned %d)", ret);
donatien 51:54ca82a7644c 796 m_inputPos = 0; //Reset input buffer state
donatien 51:54ca82a7644c 797 m_inputBuf[0] = '\0'; //Always have a null-terminating char at start of buffer
donatien 0:3b2f052c333b 798 return ret;
donatien 51:54ca82a7644c 799 }
donatien 0:3b2f052c333b 800
donatien 0:3b2f052c333b 801 if( memcmp(m_inputBuf, data + dataPos, readLen) != 0 )
donatien 0:3b2f052c333b 802 {
donatien 0:3b2f052c333b 803 //Echo does not match output
donatien 59:593fb493172f 804 m_inputBuf[readLen] = '\0';
donatien 59:593fb493172f 805 WARN("Echo does not match output, got '%s' instead", m_inputBuf);
donatien 51:54ca82a7644c 806 m_inputPos = 0; //Reset input buffer state
donatien 51:54ca82a7644c 807 m_inputBuf[0] = '\0'; //Always have a null-terminating char at start of buffer
donatien 0:3b2f052c333b 808 return NET_DIFF;
donatien 0:3b2f052c333b 809 }
donatien 0:3b2f052c333b 810
donatien 0:3b2f052c333b 811 dataPos += readLen;
donatien 0:3b2f052c333b 812 //If all characters have not been read yet
donatien 0:3b2f052c333b 813
donatien 0:3b2f052c333b 814 } while(dataPos < dataLen);
donatien 0:3b2f052c333b 815
donatien 0:3b2f052c333b 816 DBG("String sent successfully");
donatien 0:3b2f052c333b 817
donatien 0:3b2f052c333b 818 m_inputPos = 0; //Reset input buffer state
donatien 51:54ca82a7644c 819 m_inputBuf[0] = '\0'; //Always have a null-terminating char at start of buffer
donatien 0:3b2f052c333b 820
donatien 0:3b2f052c333b 821 return OK;
donatien 0:3b2f052c333b 822 }
donatien 0:3b2f052c333b 823
donatien 0:3b2f052c333b 824 /*static*/ void ATCommandsInterface::staticCallback(void const* p)
donatien 0:3b2f052c333b 825 {
donatien 0:3b2f052c333b 826 ((ATCommandsInterface*)p)->process();
donatien 0:3b2f052c333b 827 }
donatien 0:3b2f052c333b 828
donatien 0:3b2f052c333b 829 int ATCommandsInterface::ATResultToReturnCode(ATResult result) //Helper
donatien 0:3b2f052c333b 830 {
donatien 0:3b2f052c333b 831 if(result.result == ATResult::AT_OK)
donatien 0:3b2f052c333b 832 {
donatien 0:3b2f052c333b 833 return OK;
donatien 0:3b2f052c333b 834 }
donatien 0:3b2f052c333b 835 else
donatien 0:3b2f052c333b 836 {
donatien 0:3b2f052c333b 837 return NET_MOREINFO;
donatien 0:3b2f052c333b 838 }
donatien 0:3b2f052c333b 839 }
donatien 0:3b2f052c333b 840
donatien 0:3b2f052c333b 841 /*virtual*/ int ATCommandsInterface::onNewATResponseLine(ATCommandsInterface* pInst, const char* line) //Default implementation for simple commands handling
donatien 0:3b2f052c333b 842 {
donatien 0:3b2f052c333b 843 return OK;
donatien 0:3b2f052c333b 844 }
donatien 0:3b2f052c333b 845
donatien 0:3b2f052c333b 846 /*virtual*/ int ATCommandsInterface::onNewEntryPrompt(ATCommandsInterface* pInst) //Default implementation (just sends Ctrl+Z to exit the prompt by returning OK right-away)
donatien 0:3b2f052c333b 847 {
donatien 0:3b2f052c333b 848 return OK;
donatien 0:3b2f052c333b 849 }
donatien 0:3b2f052c333b 850
donatien 0:3b2f052c333b 851 void ATCommandsInterface::process() //Processing thread
donatien 0:3b2f052c333b 852 {
donatien 0:3b2f052c333b 853 DBG("AT Thread started");
donatien 0:3b2f052c333b 854 while(true)
donatien 0:3b2f052c333b 855 {
donatien 0:3b2f052c333b 856 DBG("AT Processing on hold");
donatien 0:3b2f052c333b 857 m_processingThread.signal_wait(AT_SIG_PROCESSING_START); //Block until the process is started
donatien 0:3b2f052c333b 858
donatien 0:3b2f052c333b 859 m_processingMtx.lock();
donatien 0:3b2f052c333b 860 DBG("AT Processing started");
donatien 0:3b2f052c333b 861 //First of all discard buffer
donatien 0:3b2f052c333b 862 int ret;
donatien 0:3b2f052c333b 863 size_t readLen;
donatien 0:3b2f052c333b 864 do //Drop everything
donatien 0:3b2f052c333b 865 {
donatien 0:3b2f052c333b 866 ret = m_pStream->read((uint8_t*)m_inputBuf, &readLen, AT_INPUT_BUF_SIZE - 1, 0); //Do NOT wait at this point
donatien 0:3b2f052c333b 867 } while(ret == OK);
donatien 0:3b2f052c333b 868 m_inputPos = 0; //Clear input buffer
donatien 0:3b2f052c333b 869 do
donatien 0:3b2f052c333b 870 {
donatien 59:593fb493172f 871 DBG("Trying to send a pending command");
donatien 59:593fb493172f 872 trySendCommand(); //This must be tried first as we discarded the buffer before and therefore would be blocking though there is a pending command
donatien 0:3b2f052c333b 873 DBG("Trying to read a new line");
donatien 0:3b2f052c333b 874 tryReadLine();
donatien 0:3b2f052c333b 875 } while( m_processingThread.signal_wait(AT_SIG_PROCESSING_STOP, 0).status != osEventSignal ); //Loop until the process is interrupted
donatien 0:3b2f052c333b 876 m_processingMtx.unlock();
donatien 0:3b2f052c333b 877 DBG("AT Processing stopped");
donatien 0:3b2f052c333b 878 }
donatien 0:3b2f052c333b 879 }
donatien 0:3b2f052c333b 880