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。

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#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

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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.\r\n")));
g_bUSBDownload = TRUE;
if (!OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
!OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
!OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNlength))
{
KITLOutputDebugString ("\r\nUnable to read add + size message.\r\n");
return (FALSE);
}
else
{
KITLOutputDebugString ("\rAddr: 0x%x ; Size: 0x%x\n",dwDWNAddress,dwDWNlength);
}
if (!OEMReadData(640*480*2, lpDes))
{
OALMSG(TRUE, (TEXT("Error when sending the Logo through USB.\r\n")));
SpinForever();
}
for( i=0; i<20; i++)
OALMSG(0, (TEXT("->0x%x\r\n"),*(lpDes+(640*480*2-10)+i)));
dwStartAddr = (DWORD)lpDes;
if (!WriteLogoToBootMedia(dwStartAddr, (DWORD)(640*480*2), dwStartAddr))
{
OALMSG(TRUE, (TEXT("Error when WriteLogoToBootMedia.\r\n")));
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

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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()

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BOOL WriteLogoToBootMedia(DWORD dwImageStart, DWORD dwImageLength, DWORD dwLaunchAddr)
{
DWORD dwBlock,dwNumBlocks;
LPBYTE pbBuffer;
SectorInfo si;
OALMSG(TRUE, (TEXT("+WriteLogoToBootMedia\r\n")));
dwBlock = LOGO_BLOCK;
pbBuffer = (LPBYTE)dwImageStart;
OALMSG(0, (TEXT("^^^^^^^^ 0x%x ^^^^^^^^\r\n"), (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 \r\n"), dwImageLength)); // 600k = 640 * 480 * 2
OALMSG(0, (TEXT("dwNumBlocks = 0x%x \r\n"), 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 \r\n"), 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).\r\n"), dwBlock));
return(FALSE);
}
if (!FMD_EraseBlock(dwBlock))
{
OALMSG(OAL_ERROR, (TEXT("WriteData: failed to erase block (0x%x).\r\n"), 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 ("\r\nUnable to read add + size message.\r\n");
return (FALSE);
}
else
{
KITLOutputDebugString ("\rAddr: 0x%x ; Size: 0x%x\n",dwDWNAddress,dwDWNlength);
}</pre>
OALMSG(OAL_ERROR, (TEXT("WriteData: failed to write block (0x%x).\r\n"), dwBlock)); return(FALSE); } ++dwBlock; pbBuffer += g_FlashInfo.dwBytesPerBlock; OALMSG(0, (TEXT("dwBytesPerBlock : %d\r\n"), g_FlashInfo.dwBytesPerBlock)); } OALMSG(1, (TEXT(" DownLoading
Logo success!\r\n"))); return TRUE; }
<pre></pre>
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>
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<pre name="code" class="cpp">if (!OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
!OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNAddress) ||
!OEMReadData (sizeof (DWORD), (LPBYTE) &dwDWNlength))
{
KITLOutputDebugString ("\r\nUnable to read add + size message.\r\n");
return (FALSE);
}
else
{
KITLOutputDebugString ("\rAddr: 0x%x ; Size: 0x%x\n",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。
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
<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 ("\r\nUnable to read add + size message.\r\n");
return (FALSE);
}
else
{
KITLOutputDebugString ("\rAddr: 0x%x ; Size: 0x%x\n",dwDWNAddress,dwDWNlength);
}
</pre>
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。
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WinCE开机Logo的实现(USB下载图片到nandflash)

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