tmk_core/tool/mbed/mbed-sdk/libraries/net/cellular/CellularModem/link/LinkMonitor.cpp

   1 /* LinkMonitor.cpp */
   2 /* Copyright (C) 2012 mbed.org, MIT License
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
   5  * and associated documentation files (the "Software"), to deal in the Software without restriction,
   6  * including without limitation the rights to use, copy, modify, merge, publish, distribute,
   7  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
   8  * furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice shall be included in all copies or
  11  * substantial portions of the Software.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
  14  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  15  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  17  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  18  */
  19
  20 #define __DEBUG__ 0
  21 #ifndef __MODULE__
  22 #define __MODULE__ "LinkMonitor.cpp"
  23 #endif
  24
  25 #include "core/fwk.h"
  26
  27 #include "LinkMonitor.h"
  28
  29 #include <cstdio>
  30 using std::sscanf;
  31
  32 #define DEFAULT_TIMEOUT 10000
  33
  34 LinkMonitor::LinkMonitor(ATCommandsInterface* pIf) : m_pIf(pIf), m_rssi(0), m_registrationState(REGISTRATION_STATE_UNKNOWN), m_bearer(BEARER_UNKNOWN)
  35 {
  36   m_gsm = true;
  37 }
  38
  39 int LinkMonitor::init(bool gsm)
  40 {
  41   m_gsm = gsm;
  42   if (m_gsm)
  43   {
  44     // we need to make sure that we setup the operator selection to be in 'numeric' format.
  45     // i.e. it is made up of a network and country code when returned by the modem e.g. Operator = 23415. This allows easy logic parsing for
  46     // setting up other network parameters in future.
  47     DBG("LinkMonitor::init() being called. This should only happen once: executinging AT+COPS=0,2");
  48     int ret = m_pIf->executeSimple("AT+COPS=0,2", NULL, DEFAULT_TIMEOUT); //Configure to set the operator string to Country Code and mobile network code
  49     if(ret != OK)
  50     {
  51       WARN(" NET_PROTOCOL error from sending the AT+COPS command to the modem. ");
  52       return NET_PROTOCOL;
  53     }
  54   }
  55   return OK;
  56 }
  57
  58 /*virtual*/ int LinkMonitor::onNewATResponseLine(ATCommandsInterface* pInst, const char* line)
  59 {
  60   DBG("Line is %s", line);
  61   char n[32] = "";
  62   char s[32] = "";
  63   int v;
  64   if( sscanf(line, "+CREG: %*d,%d", &v) >= 1 ) //Reg state is valid
  65   {
  66     DBG("+CREG %d", v);
  67     switch( v )
  68     {
  69       case 0:
  70         m_registrationState = REGISTRATION_STATE_UNKNOWN;
  71         break;
  72       case 1:
  73         m_registrationState = REGISTRATION_STATE_HOME_NETWORK;
  74         break;
  75       case 2:
  76         m_registrationState = REGISTRATION_STATE_REGISTERING;
  77         break;
  78       case 3:
  79         m_registrationState = REGISTRATION_STATE_DENIED;
  80         break;
  81       case 4:
  82         m_registrationState = REGISTRATION_STATE_NO_SIGNAL;
  83         break;
  84       case 5:
  85         m_registrationState = REGISTRATION_STATE_ROAMING;
  86         break;
  87       default:
  88         m_registrationState = REGISTRATION_STATE_UNKNOWN;
  89         break;
  90     }
  91   }
  92   else if( sscanf(line, "+COPS: %*d,%*d,\"%*[^\"]\",%d", &v) >= 1 )
  93   {
  94     DBG("+COPS %d", v);
  95     switch( v )
  96     {
  97       case 0:
  98         m_bearer = BEARER_GSM;
  99         break;
 100       case 2:
 101         m_bearer = BEARER_UMTS;
 102         break;
 103       case 3:
 104         m_bearer = BEARER_EDGE;
 105         break;
 106       case 4: //HSDPA
 107       case 5: //HSUPA
 108       case 6: //HSDPA + HSUPA
 109         m_bearer = BEARER_HSPA;
 110         break;
 111       case 7:
 112         m_bearer = BEARER_LTE;
 113         break;
 114       case 1: //GSM Compact
 115       default:
 116         m_bearer = BEARER_UNKNOWN;
 117         break;
 118     }
 119   }
 120   else if( sscanf(line, "+CSQ: %d,%*d", &v) >= 1 )
 121   {
 122     DBG("+CSQ %d", v);
 123     if(v == 99) //Unknown
 124     {
 125       m_rssi = 0; //Unknown
 126     }
 127     else
 128     {
 129       m_rssi = -113 + 2*v;
 130     }
 131   }
 132   else if ( (sscanf(line, "+CNUM: \"%[^\"]\",\"%[^\"]\",%d", n, s, &v) == 3) ||
 133             (sscanf(line, "+CNUM: \"\",\"%[^\"]\",%d", s, &v) == 2) )
 134   {
 135       if (*s && ((v == 145/*number includes + */) || (v == 129/*otherwise*/))) {
 136         strcpy(m_phoneNumber, s);
 137       }
 138   }
 139   return OK;
 140 }
 141
 142 /*virtual*/ int LinkMonitor::onNewEntryPrompt(ATCommandsInterface* pInst)
 143 {
 144   return OK;
 145 }
 146
 147 int LinkMonitor::getState(int* pRssi, REGISTRATION_STATE* pRegistrationState, BEARER* pBearer)
 148 {
 149   m_rssi = 0;
 150   m_registrationState = REGISTRATION_STATE_UNKNOWN;
 151   m_bearer = BEARER_UNKNOWN;
 152   int ret = m_pIf->execute(m_gsm ? "AT+CREG?;+COPS?;+CSQ" : "AT+CREG?;+CSQ", this, NULL, DEFAULT_TIMEOUT); //Configure to get registration info & get it; get signal quality
 153   if(ret != OK)
 154   {
 155     return NET_PROTOCOL;
 156   }
 157   *pRssi = m_rssi;
 158   *pRegistrationState = m_registrationState;
 159   *pBearer = m_bearer;
 160   return OK;
 161 }
 162
 163 int LinkMonitor::getPhoneNumber(char* phoneNumber)
 164 {
 165   *m_phoneNumber = '\0';
 166   if (m_gsm) {
 167     int ret = m_pIf->execute("AT+CNUM", this, NULL, DEFAULT_TIMEOUT);
 168     if(ret != OK)
 169     {
 170       return NET_PROTOCOL;
 171     }
 172   }
 173   strcpy(phoneNumber, m_phoneNumber);
 174   return OK;
 175 }