在WM5.0下獲得CELLID、LAC的途徑有兩條：利用串口發送AT指令或是利用RIL來獲取。RIL(Radio Interface Layer)是微軟自己開發的一個庫，它的程序有固有的特點，在獲取CELLID上，它其實是對第一種方法的封裝，兩者本質是一樣的。但要注意是：串口一旦打開，就難以關閉，除非重啟機器（可能涉及到底層的中斷），另外并不是所有的設備都可以取到CELLID。
下面的這段代碼就是利用COM口來獲取CELLID，并不保證所有的設備都支持。
typedef struct
{
char c[12];
char iLac[4];
char s[4];
char iId[4];
} TCREG_DATA;
void Get_Cellid(void)
{
char m_sTemp[12] = {0};
strcat(m_sTemp,"COM");
for(int i = 9; i > 0; -- i)
{
char ch1;
_itoa(i,&ch1,10);
strcat(m_sTemp,&ch1);
strcat(m_sTemp,":");
TCREG_DATA* pData = (TCREG_DATA*)GetCREG(m_sTemp);
if(!pData)
continue;
char szNum1[8] = {0};
char szNum2[8] = {0};
strcpy(szNum1,pData->iLac);
strcpy(szNum2,pData->iId);
int iLac = (int)strtol(szNum1,NULL,16);
int iId = (int)strtol(szNum2,NULL,16);
if (iLac && iId)
{
sprintf(m_sCell.LAC,"%06d",iLac);
sprintf(m_sCell.ID,"%06d",iId);
break;
}
}
}
char* GetCREG( char * comPort )
{
HANDLE hCom;
int bufpos;
DCB dcb;
COMMTIMEOUTS to;
DWORD nWritten;
DWORD event;
DWORD nRead;
static char outbuf[20], buf[256];
BYTE comdevcmd[2]= {0x84, 0x00};
WCHAR m_sCom[12] = {0};
mbstowcs(m_sCom,comPort,strlen(comPort));
hCom= CreateFile( m_sCom ,GENERIC_READ|GENERIC_WRITE,0,0,OPEN_EXISTING,0,0);
if (hCom==NULL || hCom==INVALID_HANDLE_VALUE)
{
hCom= NULL;
return NULL;
}
if (!GetCommState(hCom, &dcb))
{
return "ERROR:GetCommState Failed";
}
dcb.BaudRate= CBR_115200;
dcb.ByteSize= 8;
dcb.fParity= false;
dcb.StopBits= ONESTOPBIT;
if (!SetCommState(hCom, &dcb))
{
return "ERROR:SetCommState Failed";
}
EscapeCommFunction(hCom, SETDTR);
EscapeCommFunction(hCom, SETRTS);
GetCommTimeouts(hCom, &to);
//if (!EscapeCommFunction(hCom, SETDTR))
//{
// return "-4";
//}
//if (!EscapeCommFunction(hCom, SETRTS))
//{
// return "-5";
//}
//if (!GetCommTimeouts(hCom, &to))
//{
// return "-6";
//}
to.ReadIntervalTimeout= 0;
to.ReadTotalTimeoutConstant= 200;
to.ReadTotalTimeoutMultiplier= 0;
to.WriteTotalTimeoutConstant= 20000;
to.WriteTotalTimeoutMultiplier= 0;
SetCommTimeouts(hCom, &to);
//if (!SetCommTimeouts(hCom, &to))
//{
// return "-7";
//}
if (!SetCommMask(hCom, EV_RXCHAR))
{
return "-8";
}
DWORD rildevresult=0,nReturned=0;
if (!DeviceIoControl (hCom,0xAAAA5679L, comdevcmd, sizeof(comdevcmd),0,0,0,0))
{
return "-9";
}
bufpos = 0;
strcpy(outbuf,"AT+creg=2\r");
if (!WriteFile(hCom, outbuf, 10, &nWritten, NULL))
{
return "-10";
}
if (nWritten != 10)
{
return "-11";
}
if (!WaitCommEvent(hCom, &event, NULL))
{
return "-12";
}
while(1)
{
if (!ReadFile(hCom, buf+bufpos, 256 - bufpos, &nRead, NULL))
{
return "-13";
}
if (nRead == 0)
break;
bufpos += nRead;
if (bufpos >= 256)
break;
}
strcpy(outbuf,"AT+creg?\r");
if (!WriteFile(hCom, outbuf, 9, &nWritten, NULL))
{
return "-14";
}
if (nWritten != 9)
{
return "-15";
}
if (!WaitCommEvent(hCom, &event, NULL))
{
return "-16";
}
while(1)
{
if (!ReadFile(hCom, buf+bufpos, 256 - bufpos, &nRead, NULL))
{
return "-17";
}
if (nRead == 0)
break;
bufpos += nRead;
if (bufpos >= 256)
break;
}
puts(buf);
rildevresult = 0;
if (!EscapeCommFunction(hCom, CLRDTR))
{
return "-4";
}
if (hCom!=NULL)
{
CloseHandle(hCom);
hCom= NULL;
}
char* cregResponse = strpbrk( buf, "CREG\0" );
return cregResponse;
}
void Get_Cellid(void)
{
char m_sTemp[12] = {0};
strcat(m_sTemp,"COM");
for(int i = 9; i > 0; -- i)
{
char ch1;
_itoa(i,&ch1,10);
strcat(m_sTemp,&ch1);
strcat(m_sTemp,":");
TCREG_DATA* pData = (TCREG_DATA*)GetCREG(m_sTemp);
if(!pData)
continue;
char szNum1[8] = {0};
char szNum2[8] = {0};
strcpy(szNum1,pData->iLac);
strcpy(szNum2,pData->iId);
int iLac = (int)strtol(szNum1,NULL,16);
int iId = (int)strtol(szNum2,NULL,16);
if (iLac && iId)
{
sprintf(m_sCell.LAC,"%06d",iLac);
sprintf(m_sCell.ID,"%06d",iId);
break;
}
}
}