File content as of revision 12:66dc2c8eba2d:

/* LinkMonitor.cpp */
/*
Copyright (C) 2012 ARM Limited.

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.
*/

#define __DEBUG__ 0
#ifndef __MODULE__
#define __MODULE__ "LinkMonitor.cpp"
#endif

#include "core/fwk.h"

#include "LinkMonitor.h"

#include <cstdio>

#define DEFAULT_TIMEOUT 10000

LinkMonitor::LinkMonitor(ATCommandsInterface* pIf) : m_pIf(pIf), m_rssi(0), m_registrationState(REGISTRATION_STATE_UNKNOWN), m_bearer(BEARER_UNKNOWN)
{

}

int LinkMonitor::init()
{
  return OK;
}

/*virtual*/ int LinkMonitor::onNewATResponseLine(ATCommandsInterface* pInst, const char* line)
{
  DBG("Line is %s", line);
  int v;
  if( sscanf(line, "+CREG: %*d,%d", &v) >= 1 ) //Reg state is valid
  {
    DBG("+CREG %d", v);
    switch( v )
    {
      case 0:
        m_registrationState = REGISTRATION_STATE_UNKNOWN;
        break;
      case 1:
        m_registrationState = REGISTRATION_STATE_HOME_NETWORK;
        break;
      case 2:
        m_registrationState = REGISTRATION_STATE_REGISTERING;
        break;
      case 3:
        m_registrationState = REGISTRATION_STATE_DENIED;  
        break;
      case 4:
        m_registrationState = REGISTRATION_STATE_NO_SIGNAL;  
        break;        
      case 5:
        m_registrationState = REGISTRATION_STATE_ROAMING;  
        break;
      default:
        m_registrationState = REGISTRATION_STATE_UNKNOWN;  
        break;
    }
  }
  else if( sscanf(line, "+COPS: %*d,%*d,\"%*[^\"]\",%d", &v) >= 1 )
  {
    DBG("+COPS %d", v);
    switch( v )
    {
      case 0:
        m_bearer = BEARER_GSM;
        break;
      case 2:
        m_bearer = BEARER_UMTS;
        break;
      case 3:
        m_bearer = BEARER_EDGE;
        break;
      case 4: //HSDPA
      case 5: //HSUPA
      case 6: //HSDPA + HSUPA
        m_bearer = BEARER_HSPA;
        break;
      case 7:
        m_bearer = BEARER_LTE;
        break;  
      case 1: //GSM Compact
      default:
        m_bearer = BEARER_UNKNOWN;
        break;
    }
  }
  else if( sscanf(line, "+CSQ: %d,%*d", &v) >= 1 )
  {
    DBG("+CSQ %d", v);
    if(v == 99) //Unknown
    {
      m_rssi = 0; //Unknown
    }
    else
    {
      m_rssi = -113 + 2*v;
    }
  }
  return OK;
}

/*virtual*/ int LinkMonitor::onNewEntryPrompt(ATCommandsInterface* pInst)
{
  return OK;
}

int LinkMonitor::getState(int* pRssi, REGISTRATION_STATE* pRegistrationState, BEARER* pBearer)
{
  m_rssi = 0;
  m_registrationState = REGISTRATION_STATE_UNKNOWN;
  m_bearer = BEARER_UNKNOWN;
  int ret = m_pIf->execute("AT+CREG=2;+CREG?;+CREG=0;+COPS?;+CSQ", this, NULL, DEFAULT_TIMEOUT); //Configure to get registration info & get it; get signal quality
  if(ret != OK)
  {
    return NET_PROTOCOL;
  }
  *pRssi = m_rssi;
  *pRegistrationState = m_registrationState;
  *pBearer = m_bearer;
  return OK;
}