wince中的MAC地址是在驅動中寫死的。如果不修改會造成一些網絡方面的功能故障。比如不能互ping

 

1.添加如下注冊表
[HKEY_LOCAL_MACHINE\Comm\CS8900\Parms]
"MAC12"=dword:3322
"MAC34"=dword:5544
"MAC56"=dword:0F66

 

2.修改CS8900驅動
在CS8900.c文件中，作如下修改：


DWORD iMAC[3]={0x3322,0x5544,0x0F66};  //添加MAC地址的原始數據 
//添加函數，讀取注冊表中的MAC地址的值 
void ReadRegsister() 
{ 
    HKEY hkMAC = NULL; 
    DWORD MAC; 
    DWORD dwStatus, dwType, dwSize; 
        TCHAR gszBaseInstance[256] = _T("\\Comm\\CS8900\\Parms"); 
    // open the registry key and read our configuration 
    dwStatus = RegOpenKeyEx(HKEY_LOCAL_MACHINE, gszBaseInstance, 0, KEY_ALL_ACCESS, &hkMAC); 
    dwType = REG_DWORD; 

    if(dwStatus == ERROR_SUCCESS && dwType == REG_DWORD)  
        { 
        dwSize = sizeof(DWORD); 
        //下面讀取失敗的話那么就用初始值作為MAC地址 
        dwStatus = RegQueryValueEx(hkMAC, _T("MAC12"), NULL, &dwType, (LPBYTE) &MAC, &dwSize); 
        if (dwStatus == ERROR_SUCCESS) 
        { 
            iMAC[0]=MAC; 
        } 
        dwStatus = RegQueryValueEx(hkMAC, _T("MAC34"), NULL, &dwType, (LPBYTE) &MAC, &dwSize);   
        if (dwStatus == ERROR_SUCCESS) 
        { 
            iMAC[1]=MAC; 
        } 
        dwStatus = RegQueryValueEx(hkMAC, _T("MAC56"), NULL, &dwType, (LPBYTE) &MAC, &dwSize);   
        if (dwStatus == ERROR_SUCCESS) 
        { 
            iMAC[2]=MAC; 
        } 
    } 

} 

int initCS() 
{    
    CS8900WriteRegister(PKTPG_LINE_CTL, LINE_CTL_10_BASE_T); 
    CS8900WriteRegister(PKTPG_RX_CFG, RX_CFG_RX_OK_I_E); 
    CS8900WriteRegister(PKTPG_RX_CTL,RX_CTL_RX_OK_A | RX_CTL_IND_ADDR_A |RX_CTL_BROADCAST_A); 
    CS8900WriteRegister(PKTPG_TX_CFG, 0);  
    CS8900WriteRegister(PKTPG_BUF_CFG, 0);  
     
    //modify by constantine  
    ReadRegsister(); 
    CS8900WriteRegister(PKTPG_INDIVISUAL_ADDR + 0, iMAC[0]); 
    CS8900WriteRegister(PKTPG_INDIVISUAL_ADDR + 2, iMAC[1]); 
    CS8900WriteRegister(PKTPG_INDIVISUAL_ADDR + 4, iMAC[2]); 

    initIrq(); 
    return TRUE; 
} 

BOOLEAN CS8900ReadEthernetAddress( 
    IN PCS8900_ADAPTER Adapter 
) 
{ 
//modify by constantine 
    //Adapter->PermanentAddress[0] = 0x22; 
    //Adapter->PermanentAddress[1] = 0x33; 
    //Adapter->PermanentAddress[2] = 0x44; 
    //Adapter->PermanentAddress[3] = 0x55; 
    //Adapter->PermanentAddress[4] = 0x66; 
    //Adapter->PermanentAddress[5] = 0x0F; 
     
    Adapter->PermanentAddress[0] = iMAC[0]& 0x00FF; 
    Adapter->PermanentAddress[1] = iMAC[0]>>8; 
    Adapter->PermanentAddress[2] = iMAC[1]& 0x00FF; 
    Adapter->PermanentAddress[3] = iMAC[1]>>8; 
    Adapter->PermanentAddress[4] = iMAC[2]& 0x00FF; 
    Adapter->PermanentAddress[5] = iMAC[2]>>8;  
//end     
    RETAILMSG(1, 
        (TEXT("CS8900: PermanentAddress [ %02x-%02x-%02x-%02x-%02x-%02x ]\r\n"), 
            Adapter->PermanentAddress[0], 
            Adapter->PermanentAddress[1], 
            Adapter->PermanentAddress[2], 
            Adapter->PermanentAddress[3], 
            Adapter->PermanentAddress[4], 
            Adapter->PermanentAddress[5])); 

    // 
    // Use the burned in address as the station address, unless the 
    // registry specified an override value. 
    // 
    if ((Adapter->StationAddress[0] == 0x00) & 
        (Adapter->StationAddress[1] == 0x00) & 
        (Adapter->StationAddress[2] == 0x00) & 
        (Adapter->StationAddress[3] == 0x00) & 
        (Adapter->StationAddress[4] == 0x00) & 
        (Adapter->StationAddress[5] == 0x00) 
        ) 
    { 
        RETAILMSG(1, (TEXT("CS8900: StationAddress Modified!...\r\n"))); 
        Adapter->StationAddress[0] = Adapter->PermanentAddress[0]; 
        Adapter->StationAddress[1] = Adapter->PermanentAddress[1]; 
        Adapter->StationAddress[2] = Adapter->PermanentAddress[2]; 
        Adapter->StationAddress[3] = Adapter->PermanentAddress[3]; 
        Adapter->StationAddress[4] = Adapter->PermanentAddress[4]; 
        Adapter->StationAddress[5] = Adapter->PermanentAddress[5]; 
    } 

    return(TRUE); 
}
 

編譯后就可以了，這樣就讓驅動是從注冊表中讀取MAC地址了。那么接下來我們就有辦法修改這個MAC地址了。

 

3.寫代碼修改注冊表

下面是關鍵代碼：

 

void CWINCEMACDlg::ReadRegsister() 
{ 
    HKEY hkMAC = NULL; 
    DWORD MAC=0; 
    DWORD dwStatus, dwType, dwSize; 
    TCHAR gszBaseInstance[256] = _T("\\Comm\\CS8900\\Parms"); 
    // open the registry key and read our configuration 
    dwStatus = RegOpenKeyEx(HKEY_LOCAL_MACHINE, gszBaseInstance, 0, KEY_ALL_ACCESS, &hkMAC); 
    dwType = REG_DWORD; 

    if(dwStatus == ERROR_SUCCESS && dwType == REG_DWORD)  
    { 
        dwSize = sizeof(DWORD); 
        dwStatus = RegQueryValueEx(hkMAC, _T("MAC12"), NULL, &dwType, (LPBYTE) &MAC, &dwSize); 
        if (dwStatus == ERROR_SUCCESS) 
        { 
            m_EDT0.Format(_T("%02x"),(MAC & 0x00ff)); 
            m_EDT1.Format(_T("%02x"),(MAC >> 8)); 
        } 
        dwStatus = RegQueryValueEx(hkMAC, _T("MAC34"), NULL, &dwType, (LPBYTE) &MAC, &dwSize); 
        if (dwStatus == ERROR_SUCCESS) 
        { 
            m_EDT2.Format(_T("%02x"),(MAC & 0x00ff)); 
            m_EDT3.Format(_T("%02x"),(MAC >> 8)); 
        } 
        dwStatus = RegQueryValueEx(hkMAC, _T("MAC56"), NULL, &dwType, (LPBYTE) &MAC, &dwSize); 
        if (dwStatus == ERROR_SUCCESS) 
        { 
            m_EDT4.Format(_T("%02x"),(MAC & 0x00ff)); 
            m_EDT5.Format(_T("%02x"),(MAC >> 8)); 
        } 
    } 
    RegCloseKey( hkMAC ); 
    UpdateData(FALSE); 
} 


void CWINCEMACDlg::WriteRegsister() 
{ 
    HKEY hkMAC = NULL; 
    DWORD dwStatus, dwSize; 
    TCHAR gszBaseInstance[256] = _T("\\Comm\\CS8900\\Parms"); 
    dwStatus = RegOpenKeyEx(HKEY_LOCAL_MACHINE, gszBaseInstance, 0, KEY_ALL_ACCESS, &hkMAC); 

    if(dwStatus == ERROR_SUCCESS )  
    { 
        dwSize = sizeof(DWORD); 
        int value; 
        TCHAR num[4]={0}; 
        BYTE * lpBuffer; 
        UpdateData(TRUE); 
                value=0; 
        wsprintf(num,L"0x%s", m_EDT1.GetBuffer(0)); 
        value += _ttoi(num)<<8; 
        wsprintf(num,L"0x%s", m_EDT0.GetBuffer(0)); 
        value += _ttoi(num); 
        lpBuffer = (BYTE *)&value; 
        RegSetValueEx(hkMAC, _T("MAC12"), 0, REG_DWORD, lpBuffer,dwSize); 

        value=0; 
        wsprintf(num,L"0x%s", m_EDT3.GetBuffer(0)); 
        value += _ttoi(num)<<8; 
        wsprintf(num,L"0x%s", m_EDT2.GetBuffer(0)); 
        value += _ttoi(num); 
        lpBuffer = (BYTE *)&value; 
        RegSetValueEx(hkMAC, _T("MAC34"), 0, REG_DWORD, lpBuffer,dwSize); 

        value=0; 
        wsprintf(num,L"0x%s", m_EDT5.GetBuffer(0)); 
        value += _ttoi(num)<<8; 
        wsprintf(num,L"0x%s", m_EDT4.GetBuffer(0)); 
        value += _ttoi(num); 
        lpBuffer = (BYTE *)&value; 
        RegSetValueEx(hkMAC, _T("MAC56"), 0, REG_DWORD, lpBuffer,dwSize); 
    } 
    RegCloseKey( hkMAC ); 
}
 

4.如果有外接EEPROM之類的話，那么一般是寫在EEPROM里面的，而不是寫注冊表。如果這種實現方式必須采用Hive方式的注冊表。不然也是保存不了的。

5.特別說明
MAC地址一般由12個16進制數字組成，每2個為一組，前面3組代表網絡硬件制造商的編號，這個一般是由IEEE來分配。
后面3組代表該制造商所制造的某個網絡產品的序列號。這樣也就為什么我們說MAC地址是唯一的了（當然前提是你沒有自己修改過）。
wince驅動由于比較特殊，6組值要寫入3個IO里面一個IO只能寫入16個字節，為了方便我就不按照正常定義為兩個部分，
而是簡單定義成3個部分，這樣容易寫代碼。
必須說明的是MAC地址前3組值不是能隨便更改的，我們一般就改動后3組就行了。非要改就要找一個制造商的編號才行。
另外如果不修改MAC地址不組網是沒有問題的，但是如果組網就會有一些小問題，比如ping，wince之間無法相互ping。當然還有別的。