如何修改wince(s3c2410)的MAC地址？

wince中的MAC地址是在驱动中写死的。如果不修改会造成一些网络方面的功能故障。比如不能互ping。

 

下面是我解决的方法：

 

1.添加如下注册表
[HKEY_LOCAL_MACHINE/Comm/CS8900/Parms]
"MAC12"=dword:3322
"MAC34"=dword:5544
"MAC56"=dword:0F66

 

2.修改CS8900驱动
在CS8900.c文件中，作如下修改：

WORD iMAC[3]={0x3322,0x5544,0x0F66};  //添加MAC地址的原始数据
//添加函数，读取注册表中的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);
        //下面读取失败的话那么就用初始值作为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);
}
 

编译后就可以了，这样就让驱动是从注册表中读取MAC地址了。那么接下来我们就有办法修改这个MAC地址了。

 

3.写代码修改注册表

下面是关键代码：

 

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之类的话，那么一般是写在EEPROM里面的，而不是写注册表。如果这种实现方式必须采用Hive方式的注册表。不然也是保存不了的。

5.特别说明
MAC地址一般由12个16进制数字组成，每2个为一组，前面3组代表网络硬件制造商的编号，这个一般是由IEEE来分配。
后面3组代表该制造商所制造的某个网络产品的序列号。这样也就为什么我们说MAC地址是唯一的了（当然前提是你没有自己修改过）。
wince驱动由于比较特殊，6组值要写入3个IO里面一个IO只能写入16个字节，为了方便我就不按照正常定义为两个部分，
而是简单定义成3个部分，这样容易写代码。
必须说明的是MAC地址前3组值不是能随便更改的，我们一般就改动后3组就行了。非要改就要找一个制造商的编号才行。
另外如果不修改MAC地址不组网是没有问题的，但是如果组网就会有一些小问题，比如ping，wince之间无法相互ping。当然还有别的。

 

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/constantine/archive/2008/08/28/2842286.aspx