Diff: drv/gprs/GPRSModem.cpp

Revision:

0:ec559500a63f

diff -r 000000000000 -r ec559500a63f drv/gprs/GPRSModem.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/drv/gprs/GPRSModem.cpp	Fri Apr 08 14:39:41 2011 +0000
@@ -0,0 +1,292 @@
+
+/*
+Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
+ 
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+ 
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+ 
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "GPRSModem.h"
+#include "mbed.h"
+
+//#define __DEBUG
+#include "dbg/dbg.h"
+
+#define WAIT_BTW_NETW_POLLS 3.
+
+#include "netCfg.h"
+#if NET_GPRS
+
+GPRSModem::GPRSModem() : ATIf()
+{
+  DBG("New GPRSModem@%p\n", this);
+}
+
+GPRSModem::~GPRSModem()
+{
+
+}
+  
+GPRSErr GPRSModem::getNetworkState()
+{
+  ATIf::flushBuffer();
+  /*
+  netState can be : (Telit_AT_Reference_Guide.pdf p.98)
+  0 - not registered, ME is not currently searching a new operator to register to
+  1 - registered, home network
+  2 - not registered, but ME is currently searching a new operator to register to
+  3 - registration denied
+  4 - unknown
+  5 - registered, roaming
+  */
+ // DBG("Network?...\r\n");
+  ATIf::setReadMode(false); //Discard chars
+  ATIf::setTimeout(10000);
+  ATIf::setLineMode(true); //Line mode
+  int netState = 0;
+  int len;
+  len = ATIf::printf("AT+CREG?"); //Registered ?
+  if(!len) DBG("\r\nprintf - len=%d\r\n",len);
+  if(!len)
+    return GPRS_MODEM; //Nothing was actually sent
+    
+  len = ATIf::scanf("+CREG: 0,%d", &netState); //Get status
+  if(len != 1) DBG("\r\nscanf - len=%d\r\n",len);
+  if(len != 1) //Likely +CMS ERROR was returned
+    return GPRS_MODEM;
+
+  if( !!ATIf::checkOK() ) //Should not be a problem
+    {DBG("\r\nNOK\r\n"); return GPRS_MODEM; }
+    
+  switch(netState)
+  {
+  case 1:
+  case 5: //TODO: Option allow roaming
+    DBG("\r\nNetwork is up!\r\n");
+    return GPRS_OK;
+  case 3:
+    DBG("\r\nAccess to network denied.\r\n");
+    return GPRS_DENIED;
+  case 0:
+    DBG("\r\nNo network.\r\n");
+    return GPRS_NONETWORK;
+  case 4:
+  case 2:
+    //DBG("\r\nRegistering...\r\n");
+    return GPRS_REGISTERING;
+  }
+    
+  return GPRS_MODEM; // Should not reach this
+  
+}
+
+GPRSErr GPRSModem::setNetworkUp()
+{
+  ATIf::flushBuffer();
+  GPRSErr err = GPRS_REGISTERING;
+  while(true)
+  {
+    err = getNetworkState();
+    if(err != GPRS_REGISTERING)
+      break;
+    wait(WAIT_BTW_NETW_POLLS);
+  }
+  return err;
+}
+
+//Same, but for GPRS
+GPRSErr GPRSModem::getGPRSState()
+{
+  ATIf::flushBuffer();
+  /*
+  netState can be : (Telit_AT_Reference_Guide.pdf p.192)
+  0 - not registered, terminal is not currently searching a new operator to register to
+  1 - registered, home network
+  2 - not registered, but terminal is currently searching a new operator to register to
+  3 - registration denied
+  4 - unknown
+  5 - registered, roaming
+  */
+  
+  DBG("GPRS?...\r\n");
+  ATIf::setReadMode(false); //Discard chars
+  ATIf::setTimeout(10000);
+  ATIf::setLineMode(true); //Line mode
+  int netState = 0;
+  int len;
+  len = ATIf::printf("AT+CGREG?"); //Registered ?
+  if(!len)
+    return GPRS_MODEM; //Nothing was actually sent
+    
+  len = ATIf::scanf("+CGREG: %*d,%d", &netState); //Get GPRS status, see GSM 07.07 spec as Telit AT ref is wrong
+  if(len != 1) DBG("\r\nscanf - len=%d\r\n",len);
+  if(len != 1) //Likely +CMS ERROR was returned
+    return GPRS_MODEM;
+
+  if( !!ATIf::checkOK() ) //Should not be a problem
+    return GPRS_MODEM;
+    
+  switch(netState)
+  {
+  case 1:
+  case 5: //TODO: Option allow roaming
+    DBG("\r\nNetwork is up!\r\n");
+    return GPRS_OK;
+  case 3:
+    DBG("\r\nAccess to network denied.\r\n");
+    return GPRS_DENIED;
+  case 0:
+    DBG("\r\nNo network.\r\n");
+    return GPRS_NONETWORK;
+  case 4:
+  case 2:
+    DBG("\r\nRegistering...\r\n");
+    return GPRS_REGISTERING;
+  }
+    
+  return GPRS_MODEM; // Should not reach this
+  
+}
+
+GPRSErr GPRSModem::setGPRSUp()
+{
+  ATIf::flushBuffer();
+  GPRSErr err;
+  
+  err = setNetworkUp();
+  if(err)
+    return err;
+  
+  DBG("\r\nAttaching GPRS...\r\n");
+  ATIf::setReadMode(false); //Discard chars
+  ATIf::setTimeout(10000);
+  ATIf::setLineMode(true); //Line mode
+  int len;  
+  
+  err = getGPRSState();
+  if(err == GPRS_NONETWORK)
+  {  
+    len = ATIf::printf("AT+CGATT=1"); //Attach
+    if(!len)
+      return GPRS_MODEM; //Nothing was actually sent  
+
+    if( !!ATIf::checkOK() ) //Should not be a problem
+      return GPRS_MODEM;
+  }
+  
+  while(true)
+  {
+    err = getGPRSState();
+    if(err != GPRS_REGISTERING)
+      break;
+    wait(WAIT_BTW_NETW_POLLS);
+  }
+  return err;
+}
+
+GPRSErr GPRSModem::setGPRSDown()
+{ 
+  ATIf::flushBuffer();
+  DBG("\r\nDetaching GPRS...\r\n");
+  ATIf::setReadMode(false); //Discard chars
+  ATIf::setTimeout(10000);
+  ATIf::setLineMode(true); //Line mode
+  int len;
+  
+  len = ATIf::printf("AT+CGATT=0"); //Detach
+  if(!len)
+    return GPRS_MODEM; //Nothing was actually sent  
+
+  if( !!ATIf::checkOK() ) //Should not be a problem
+    return GPRS_MODEM;
+ 
+  return GPRS_OK;
+}
+
+  
+GPRSErr GPRSModem::connect(const char* apn /*=NULL*/)
+{
+  ATIf::flushBuffer();
+  GPRSErr err;
+    
+  ATIf::setReadMode(false); //Discard chars
+  ATIf::setTimeout(5000);
+  ATIf::setLineMode(true); //Line mode
+  
+  DBG("\r\nConnecting...\r\n");  
+  
+  int len;
+  
+  if( apn != NULL ) //Config APN
+  {
+    len = ATIf::printf("AT+CGDCONT=1,\"IP\",\"%s\"",apn); //Define APN
+    if(!len)
+      return GPRS_MODEM; //Nothing was actually sent
+
+    if( !!ATIf::checkOK() ) //Should not be a problem
+      return GPRS_MODEM;
+  }
+    
+  err = setGPRSUp();
+  if(err)
+    return err;
+    
+  ATIf::setReadMode(false); //Discard chars
+  ATIf::setTimeout(60000);
+  ATIf::setLineMode(true); //Line mode
+  //
+  //len = ATIf::printf("AT+CGDATA=\"PPP\",1"); //Connect using PDP context #1
+//  len = ATIf::printf("ATDT *99***1#");
+  len = ATIf::printf("ATDT *99#");
+  if(!len)
+    return GPRS_MODEM; //Nothing was actually sent
+    
+  len = ATIf::scanf("CONNECT"); //Beginning of session
+  if(len != 0) //Likely +CME ERROR was returned or NO CARRIER
+    return GPRS_MODEM;
+    
+  //ATIf::setSignals(false);
+  
+  DBG("\r\nConnected.\r\n");
+    
+  return GPRS_OK; //Time to enter a PPP Session !   
+  
+}
+
+GPRSErr GPRSModem::disconnect()
+{
+  ATIf::flushBuffer();
+  ATIf::setReadMode(false); //Discard chars
+  ATIf::setTimeout(5000);
+  ATIf::setLineMode(true); //Line mode
+  
+  if( !!ATIf::checkOK() ) //Should be present at the end of connection
+    return GPRS_MODEM;
+  
+  GPRSErr err;  
+  err = setGPRSDown();
+  if(err)
+    return err;
+    
+  DBG("\r\nDisconnected.\r\n");
+    
+  return GPRS_OK;
+}
+
+#endif
+