WinCE开机Logo的实现(USB下载图片到nandflash)

WinCE开机启动Logo使用Eboot读取NandFlash中的图片数据，然后显示的方式。对于开机logo的方式网友http://jazka.blog.51cto.com/809003/664131有了详细的描述。但是自己在运用的时候遇到了一些问题。现在重新进行整理。

在loader.h中增加保留的block提供给图片用。

#define LOGO_BLOCK              8
#define LOGO_SECTOR_SIZE            FILE_TO_SECTOR_SIZE(LOGO_RAM_IMAGE_SIZE)
#define LOGO_BLOCK_SIZE             8//SECTOR_TO_BLOCK(LOGO_SECTOR_SIZE)
#define LOGO_SECTOR             BLOCK_TO_SECTOR(LOGO_BLOCK)
/*
#define CONFIG_BLOCK            16
#define  CONFIG_BLOCK_SIZE      1
#define  CONFIG_SECTOR          BLOCK_TO_SECTOR(CONFIG_BLOCK)
*/
#define RESERVED_BOOT_BLOCKS            (NBOOT_BLOCK_SIZE + TOC_BLOCK_SIZE + EBOOT_BLOCK_SIZE + LOGO_BLOCK_SIZE )

main.c中的MainMenu函数中增加通过USB下载图片的菜单

case 'G':
case 'g':

{
    DWORD dwDWNAddress;
    DWORD dwDWNlength;
    DWORD i;
    BYTE Temp[10];
    DWORD dwStartAddr = 0;
    LPBYTE lpDes = NULL;
    lpDes = (LPBYTE)(FILE_CACHE_START);

        OALMSG(TRUE, (TEXT("Please send the Logo through USB.
")));
        g_bUSBDownload = TRUE;
<span style="white-space:pre">  </span>if (!OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
            !OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
            !OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNlength))
    {
    <span style="white-space:pre">  </span>KITLOutputDebugString ("
Unable to read add + size message.
");
        return (FALSE);
    }
    else
    {
    <span style="white-space:pre">  </span>KITLOutputDebugString ("
Addr: 0x%x ; Size: 0x%x
",dwDWNAddress,dwDWNlength);
    }

        if (!OEMReadData(640*480*2, lpDes))
        {
        <span style="white-space:pre">  </span>OALMSG(TRUE, (TEXT("Error when sending the Logo through USB.
")));
                SpinForever();
        }
        for( i=0; i<20; i++)
              <span style="white-space:pre">    </span>OALMSG(0, (TEXT("->0x%x
"),*(lpDes+(640*480*2-10)+i)));

        dwStartAddr = (DWORD)lpDes;

        if (!WriteLogoToBootMedia(dwStartAddr, (DWORD)(640*480*2), dwStartAddr))
        {
        <span style="white-space:pre">  </span>OALMSG(TRUE, (TEXT("Error when WriteLogoToBootMedia.
")));
                SpinForever();
        }
    break;
}

在OEMPlatformInit()函数初始化LCD完成之后进行读取NandFlash中的数据进行显示，EXT_Logo()函数在nand.cpp中

void    EXT_Logo(void)
{
    SectorInfo si;
    DWORD i,j,k;
    UINT32 start_addr = 0x100000;

    k =     start_addr >> 9;

    for (i=0;i<2048;i++)
    {
        j = i + k;
        FMD_ReadSector(j, (PUCHAR)(IMAGE_FRAMEBUFFER_UA_BASE_eboot+(512*i)), &si, 1);
    }

}

在Nand.cpp中添加写图片数据到NandFlash的函数WriteLogoToBootMedia()

BOOL WriteLogoToBootMedia(DWORD dwImageStart, DWORD dwImageLength, DWORD dwLaunchAddr)
{
  DWORD dwBlock,dwNumBlocks;
  LPBYTE pbBuffer;
  SectorInfo si;

  OALMSG(TRUE, (TEXT("+WriteLogoToBootMedia
")));

  dwBlock = LOGO_BLOCK;
  pbBuffer = (LPBYTE)dwImageStart;

  OALMSG(0, (TEXT("^^^^^^^^ 0x%x ^^^^^^^^
"), (unsigned short *)pbBuffer));

  dwNumBlocks = (dwImageLength/(g_FlashInfo.wDataBytesPerSector*g_FlashInfo.wSectorsPerBlock)) +
                                                 (dwImageLength%(g_FlashInfo.wDataBytesPerSector*g_FlashInfo.wSectorsPerBlock) ? 1: 0);

  OALMSG(0, (TEXT("dwImageLength = 0x%x 
"), dwImageLength)); // 600k = 640 * 480 * 2
  OALMSG(0, (TEXT("dwNumBlocks = 0x%x 
"), dwNumBlocks));  //     5 = 600 /128

  while (dwNumBlocks--)
  {
    OALMSG(0, (TEXT("dwBlock(0x%x) X "), dwBlock)); // 8, 9, a, b, c
    OALMSG(0, (TEXT("g_FlashInfo.wSectorsPerBlock(0x%x)"), g_FlashInfo.wSectorsPerBlock)); // 64
    OALMSG(0, (TEXT(" = 0x%x 
"), dwBlock*g_FlashInfo.wSectorsPerBlock));

    FMD_ReadSector(dwBlock*g_FlashInfo.wSectorsPerBlock, NULL, &si, 1);

    // Stepldr & Eboot image in nand flash
    // block mark as BLOCK_STATUS_RESERVED & BLOCK_STATUS_READONLY & BLOCK_STATUS_BAD
    if ((si.bBadBlock == 0x0) && (si.bOEMReserved !=3 ))
    {
      ++dwBlock;
      ++dwNumBlocks;                // Compensate for fact that we didn't write any blocks.
      continue;
    }

    if (!ReadBlock(dwBlock, NULL, g_pSectorInfoBuf))
    {
      OALMSG(OAL_ERROR, (TEXT("WriteData: failed to read block (0x%x).
"), dwBlock));
      return(FALSE);
    }

    if (!FMD_EraseBlock(dwBlock))
    {
      OALMSG(OAL_ERROR, (TEXT("WriteData: failed to erase block (0x%x).
"), dwBlock));
      return FALSE;
    }

    if (!WriteBlock(dwBlock, pbBuffer, g_pSectorInfoBuf))
    { <pre name="code" class="cpp">if (!OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
                        !OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
                        !OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNlength))
                    {
                        KITLOutputDebugString ("
Unable to read add + size message.
");
                        return (FALSE);
                    }
                    else
                    {
                        KITLOutputDebugString ("
Addr: 0x%x ; Size: 0x%x
",dwDWNAddress,dwDWNlength);
                    }</pre><br>
OALMSG(OAL_ERROR, (TEXT("WriteData: failed to write block (0x%x).
"), dwBlock)); return(FALSE); } ++dwBlock; pbBuffer += g_FlashInfo.dwBytesPerBlock; OALMSG(0, (TEXT("dwBytesPerBlock : %d
"), g_FlashInfo.dwBytesPerBlock)); } OALMSG(1, (TEXT(" DownLoading
 Logo success!
"))); return TRUE; }<p></p>
<pre></pre>
<br>
<br>
对于图片提取可以直接写入到NandFlash格式的数据使用Image2LCD这个软件选择16位彩色，RGB565生成BIN文件。下载地址<a href="http://download.csdn.net/detail/qq236106303/4371268">http://download.csdn.net/detail/qq236106303/4371268</a>
<p></p>
<p><br>
</p>
<p>开始使用USB下载图片时候，遇到花屏的问题，使用H-JTAG下载上面生成的bin格式的图片。能够正常显示。因此确定是USB下载有问题。而显示函数和图片格式已经正确。但是HJTAG并口下载速度太慢，不适合生产使用。所以找了下原因。 发现时因为DNW通过USB下载的时候会自动在我们选择的文件之前加上头信息。因此在程序mainMenu中，我使用了</p><pre name="code" class="cpp">if (!OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
                        !OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
                        !OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNlength))
                    {
                        KITLOutputDebugString ("
Unable to read add + size message.
");
                        return (FALSE);
                    }
                    else
                    {
                        KITLOutputDebugString ("
Addr: 0x%x ; Size: 0x%x
",dwDWNAddress,dwDWNlength);
                    }</pre>先读取DNW强加的非图片的数据，之后没有出现花屏的现象。但是对于DNW的源码没有研究，所以也不是特别确定，幸亏问题可以解决。 调试的时候可以采用打印SDRAM中的数据的方法进行调试，因为程序中指定的下载到SDRAM的地址是FILE_CACHE_START这个地址。<p></p>
<p><br>
</p>
<p>下载完成logo以后，选择菜单马上进行下载NK.BIN文件，发现出现错误，说BIN文件的格式不支持。以为下载内核BIN文件，会根据开始7个字节的数据判断文件时Eboot还是nk。打印出来的信息看到开始的几个字节和NK,BIN里面的数据出现了偏移。因此也怀疑是DNW搞的鬼，最后在blcommon.c的DownloadImage函数中修改</p>
<p></p><pre name="code" class="cpp">if (!OEMReadData (2*sizeof (UCHAR), (LPBYTE) &dwDWNAddress) ||   //根据打印调试出来看，出现的2个字节偏移是因为在这里读取了DWORD，所以改成2个char
        !OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
        !OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNlength))
    {
            KITLOutputDebugString ("
Unable to read add + size message.
");
            return (FALSE);
     }
    else
    {
            KITLOutputDebugString ("
Addr: 0x%x ; Size: 0x%x
",dwDWNAddress,dwDWNlength);
    }
</pre><p></p>
<p><br>
</p>
<span style="white-space:pre"></span>通过上面的修改可以顺利的使用USB先下载LOGO.BIN然后再下载NK.BIN。<br>
<br>
<p><br>
</p>

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