WinCE6.0 修改开机Logo方法集锦（二）
发布时间：2020-12-15 06:49:30 所属栏目：百科 来源：网络整理
导读：?? 中秋假期已过，回来继续该博文主题。今天讲解第二种方法，将 Logo 图片的数据写入到 Nand Flash 中，在启动初始化 LCD 的时候，从固定的地址将数据读出并填充到显示缓存中。 ?????? 实验平台： WinCE6.0+Android6410 +4.3 寸 CLD 。 ?????? 以下内容参考
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?? 中秋假期已过，回来继续该博文主题。今天讲解第二种方法，将Logo图片的数据写入到Nand Flash中，在启动初始化LCD的时候，从固定的地址将数据读出并填充到显示缓存中。
?????? 实验平台：WinCE6.0+Android6410 +4.3寸CLD。
?????? 以下内容参考自CSDN论坛的一个帖子，不过里面的描述不是特别清楚，该主题博文进行了整理。为尊重原创，给出链接http://topic.csdn.net/u/20100126/14/ef1fc7c4-d8db-426b-b6bf-b74d74cdd05a.html。
??????
?????? 将Logo图片写Flash的思路继续细分，又可以分为几种不同的实现方法，今天先描述实现方法一，这是其中比较简单的一种方法，不需要修改bib文件等配置性文件，只需要修改代码即可。
?????? 首先提几个问题：
?????? 1、在什么时候将Logo数据写入Nand Flash？
?????? 2、在什么时候读Nand Flash数据到显示缓存？
?????? 3、要写的Logo的数据是什么？
?????? 4、写入Flash的什么位置，又从什么位置读数据？
?????? 5、写Flash的函数和读Flash的函数如何实现？
?????? 上面几个问题弄清楚了，方法一基本就出来了。给出上面几个问题的解决方法：
?????? 1
、答：为了增加后期更加方便的升级开机启动
Logo
，在启动
Eboot
的主菜单中添加下载
Logo
的选项，如下图所示，选项
G)
便是通过
USB
下载
Logo
数据，同时将
Logo
数据写入到
Nand Flash
的某一位置上。
?
??????
?????? ?2
、答：在
Eboot
的初始化
InitializeDisplay
中，可以找到关于填充显示缓存的代码，改为从
Flash
的某一位置读取即可。
????? 3
、
答：
关于写
Logo
的数据，可以是
bin
格式的，也可以是原始的
bmp
格式。其实
bin
格式的内容也都是通过读取
bmp
文件的位图阵列而生成的。两者的差别就在于一个在
Eboot
里面实现读取
bmp
的位图阵列，一个是在独立的应用程序中读取的。
????? 4
、
答：
关于操作
Nand Flash
的位置问题，需要查看
loader.h
文件的相关代码，有关于
Block
的使用情况，如下所示。在这里为
Logo
数据分配一定的
Block
。
// NAND Boot (loads into SteppingStone) @ Block 0
#define NBOOT_BLOCK???????????????????????????????? 0 #define NBOOT_BLOCK_SIZE????????????????????????1 #define NBOOT_SECTOR????????????????????????????????BLOCK_TO_SECTOR(NBOOT_BLOCK) // TOC @ Block 1 #define TOC_BLOCK???????????????????????????????????? 1 #define TOC_BLOCK_SIZE????????????????????????????1 #define TOC_SECTOR????????????????????????????????????BLOCK_TO_SECTOR(TOC_BLOCK) // Eboot @ Block 2 #define EBOOT_BLOCK???????????????????????????????? 2 #define EBOOT_SECTOR_SIZE???????????????????? FILE_TO_SECTOR_SIZE(EBOOT_RAM_IMAGE_SIZE) #define EBOOT_BLOCK_SIZE????????????????????????SECTOR_TO_BLOCK(EBOOT_SECTOR_SIZE) #define EBOOT_SECTOR????????????????????????????????BLOCK_TO_SECTOR(EBOOT_BLOCK)
?????? 5
、答：
Flash
的读写操作函数实现主要在
nand.cpp
文件中，具体实现可以参考函数
ReadOSImageFromBootMedia
和
WriteOSImageToBootMedia
。
?
?????
下面给出详细的修改步骤：
????? 1
、首先修改
loader.h
文件，为
Logo
数据分配一定的
Block
空间。添加如下代码：
// Eboot @ Block 2
#define EBOOT_BLOCK???????????????????????????????? 2 #define EBOOT_SECTOR_SIZE???????????????????? FILE_TO_SECTOR_SIZE(EBOOT_RAM_IMAGE_SIZE) #define EBOOT_BLOCK_SIZE????????????????????????SECTOR_TO_BLOCK(EBOOT_SECTOR_SIZE) #define EBOOT_SECTOR????????????????????????????????BLOCK_TO_SECTOR(EBOOT_BLOCK) //-----------------------add by jazka 2011.09.04------------------------- //-----------------------------start-------------------------------------- // Logo @ Block 6~ #define LOGO_BLOCK????????????????????6 #define LOGO_BLOCK_SIZE????????????????20 #define LOGO_SECTOR????????????????????????????BLOCK_TO_SECTOR(LOGO_BLOCK) //----------------------------- end --------------------------------------- //-----------------------modify by jazka 2011.09.04----------------------- //-----------------------------start--------------------------------------- //#define RESERVED_BOOT_BLOCKS????????????????(NBOOT_BLOCK_SIZE + TOC_BLOCK_SIZE + EBOOT_BLOCK_SIZE) #define RESERVED_BOOT_BLOCKS????????????????(NBOOT_BLOCK_SIZE + TOC_BLOCK_SIZE + EBOOT_BLOCK_SIZE + LOGO_BLOCK_SIZE)
从上面可以看出从
Block6
开始，为
Logo
分配了
20
个
Block
的
Flash
空间，这样可以存放
64KB*20=1280KB
大小的
Logo
数据，即
?????? 2
、在
Eboot
启动主菜单中增加下载
Logo
数据的相应的选项。修改的代码如下：
????????????????EdbgOutputDebugString ( "F) Low-level format the Smart Media cardrn");
????//add by jazka 2011.09.05 ????//-----------------------------start--------------------------------- ????EdbgOutputDebugString ( "G) DOWNLOAD Logo now(USB)rn"); ????//----------------------------- end --------------------------------- ????????????????EdbgOutputDebugString ( "L) LAUNCH existing Boot Media imagern"); ????????????????EdbgOutputDebugString ( "R) Read Configuration rn"); ????????????????EdbgOutputDebugString ( "U) DOWNLOAD image now(USB)rn"); ????????????????EdbgOutputDebugString ( "W) Write Configuration Right Nowrn"); ????????????????EdbgOutputDebugString ( "rnEnter your selection: "); ????????????????while (! ( ( (KeySelect >= '0') && (KeySelect <= '9') ) || ???????????????????????????????????? ( (KeySelect == 'A') || (KeySelect == 'a') ) || ???????????????????????????????????? ( (KeySelect == 'B') || (KeySelect == 'b') ) || ???????????????????????????????????? ( (KeySelect == 'C') || (KeySelect == 'c') ) || ???????????????????????????????????? ( (KeySelect == 'D') || (KeySelect == 'd') ) || ???????????????????????????????????? ( (KeySelect == 'E') || (KeySelect == 'e') ) || ???????????????????????????????????? ( (KeySelect == 'F') || (KeySelect == 'f') ) || ???????????? ( (KeySelect == 'G') || (KeySelect == 'g') ) ||???????????????? //add by jazak 2011.09.05 ???????????????????????????????????? ( (KeySelect == 'L') || (KeySelect == 'l') ) || ???????????????????????????????????? ( (KeySelect == 'R') || (KeySelect == 'r') ) || ???????????????????????????????????? ( (KeySelect == 'U') || (KeySelect == 'u') ) || ???????????????????????????????????? ( (KeySelect == 'W') || (KeySelect == 'w') ) )) ????????????????{ ????????????????????????KeySelect = OEMReadDebugByte(); ????????????????}
????//add by jazka 2011.09.05
????//--------------------------start----------------------------- ????case 'G': ????case 'g': ??????{ ????????OALMSG(TRUE,(TEXT("Please send the Logo through USB.rn"))); ????????g_bUSBDownload = TRUE; ????????{ ??????????DWORD dwStartAddr = 0; ??????????LPBYTE lpDes = NULL;???????? ??????????lpDes = (LPBYTE)(FILE_CACHE_START); ??????????if (!OEMReadData(LCD_WIDTH*LCD_HEIGHT*2,lpDes)) ??????????{ ????????????OALMSG(TRUE,(TEXT("Error when sending the Logo through USB.rn"))); ????????????SpinForever(); ??????????} ??????????dwStartAddr = (DWORD)lpDes; ??????????if (!WriteLogoToBootMedia(dwStartAddr,(DWORD)(LCD_WIDTH*LCD_HEIGHT*2),dwStartAddr)) ??????????{ ????????????OALMSG(TRUE,(TEXT("Error when WriteLogoToBootMedia.rn"))); ????????????SpinForever(); ??????????} ????????} ??????} ??????break; ????//-------------------------- end -----------------------------
这里把
g_bUSBDownload
设置为
TRUE
，以便后面选择
USB
进行下载。由于
USB
下载的速度和写
Flash
速度不匹配，所以先下载到内存中，然后在一下子写入
Flash
中（这部分详解见博客
http://www.voidcn.com/article/p-hzhmplfz-kc.html
）。
WriteLogoToBootMedia
便是
Flash
的写函数，后面给出实现。
?????? 3
、修改
LCD
初始化函数
InitializeDisplay
，修改代码如下：
????????// Fill Framebuffer
#if(SMDK6410_LCD_MODULE == LCD_MODULE_UT_LCD35A) ????????memcpy((void *)EBOOT_FRAMEBUFFER_UA_START,(void *)InitialImage_rgb16_320x240,320*240*2); #elif????????(LCD_BPP == 16) ????????{ ????//delete by jazka 2011.08.31????修改开机启动界面 ???????????? /* int i; ????????????????unsigned short *pFB; ????????????????pFB = (unsigned short *)EBOOT_FRAMEBUFFER_UA_START; ????????????????for (i=0; i<LCD_WIDTH*LCD_HEIGHT; i++) ????{ ????????????????????????//*pFB++ = 0x0000;//0x001F;????????????????// Blue ??????//*pFB++ = 0x001F;???????????????????????????????????????????? //modify by jazka 2011.07.22 ??????*pFB++ = InitialImage_rgb16_480x272[i]; ????} ????*/ ????//add by jazka 2011.08.31 ????//memcpy((void *)EBOOT_FRAMEBUFFER_UA_START,(void *)InitialImage_rgb16_480x272,480*272*2); ????//modify by jazka 2011.09.07 ????DWORD dwReadAddr = (DWORD)EBOOT_FRAMEBUFFER_UA_START; ????if (!DisplayLogoFromBootMedia(dwReadAddr,(DWORD)LCD_WIDTH*LCD_HEIGHT*2,dwReadAddr)) ????{ ??????int i; ??????unsigned short *pFB; ??????pFB = (unsigned short *)EBOOT_FRAMEBUFFER_UA_START; ??????for (i=0; i<LCD_WIDTH*LCD_HEIGHT; i++) ????????*pFB++ = 0x0000;//0x001F;????????????????// Blue ????}
DisplayLogoFromBootMedia
函数便是
Flash
的度函数，这里将读出的数据写入到显示缓存
EBOOT_FRAMEBUFFER_US_START
中，该函数的实现后面给出。
????? 4
、修改
nand.cpp
文件，添加
WriteLogoToBootMedia
和
DisplayLogoFromBootMedia
两个函数的实现。
/*
??Write the Logo data to Nand Flash ??add by jazka 2011.09.05 */ BOOL WriteLogoToBootMedia(DWORD dwImageStart,DWORD dwImageLength,DWORD dwLaunchAddr) { ??DWORD dwBlock,dwNumBlocks; ??LPBYTE pbBuffer; ??SectorInfo si; ??OALMSG(TRUE,(TEXT("+WriteLogoToBootMediarn"))); ??dwBlock = LOGO_BLOCK; ??pbBuffer = (LPBYTE)dwImageStart; ??OALMSG(TRUE,(TEXT("^^^^^^^^ 0x%x ^^^^^^^^rn"),(unsigned short *)pbBuffer)); ??dwNumBlocks = (dwImageLength/(g_FlashInfo.wDataBytesPerSector*g_FlashInfo.wSectorsPerBlock)) +???? ???????????????????????????????????????????????? (dwImageLength%(g_FlashInfo.wDataBytesPerSector*g_FlashInfo.wSectorsPerBlock) ? 1: 0); ??OALMSG(TRUE,(TEXT("dwImageLength = 0x%x rn"),dwImageLength)); ??OALMSG(TRUE,(TEXT("dwNumBlocks = 0x%x rn"),dwNumBlocks)); ??while (dwNumBlocks--) ??{ ????OALMSG(TRUE,(TEXT("dwBlock(0x%x) X "),dwBlock)); ????OALMSG(TRUE,(TEXT("g_FlashInfo.wSectorsPerBlock(0x%x)"),g_FlashInfo.wSectorsPerBlock)); ????OALMSG(TRUE,(TEXT(" = 0x%x rn"),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,g_pSectorInfoBuf)) ????{ ??????OALMSG(OAL_ERROR,(TEXT("WriteData: failed to read block (0x%x).rn"),dwBlock)); ??????return(FALSE); ????} ????if (!FMD_EraseBlock(dwBlock)) ????{ ??????OALMSG(OAL_ERROR,(TEXT("WriteData: failed to erase block (0x%x).rn"),dwBlock)); ??????return FALSE; ????} ????if (!WriteBlock(dwBlock,pbBuffer,(TEXT("WriteData: failed to write block (0x%x).rn"),dwBlock)); ??????return(FALSE); ????} ????++dwBlock; ????pbBuffer += g_FlashInfo.dwBytesPerBlock; ????OALMSG(TRUE,(TEXT("dwBytesPerBlock : %drn"),g_FlashInfo.dwBytesPerBlock)); ??} ??OALMSG(TRUE,(TEXT("_WriteLogoToBootMediarn"))); ??return TRUE; }
/*
??Read the Logo data from Nand Flash ??add by jazka 2011.09.05 */ BOOL DisplayLogoFromBootMedia(DWORD dwImageStart,DWORD dwLaunchAddr) { ??unsigned int * pFB32 = (unsigned int *)EBOOT_FRAMEBUFFER_UA_START; ??unsigned int * dst = pFB32;???????? ??//unsigned int * p = NULL; ??SectorInfo si; ??DWORD dwBlock,dwNumBlocks; ??OALMSG(TRUE,(TEXT("+ReadLogoFromBootMediarn"))); ??dwBlock = LOGO_BLOCK; ??OALMSG(TRUE,dwImageLength)); ??OALMSG(TRUE,g_FlashInfo.wDataBytesPerSector)); ??OALMSG(TRUE,g_FlashInfo.wSectorsPerBlock)); ??if (0 == g_FlashInfo.wDataBytesPerSector || 0 == g_FlashInfo.wSectorsPerBlock) ??{ ????return FALSE; ??} ??dwNumBlocks = (dwImageLength / (g_FlashInfo.wDataBytesPerSector*g_FlashInfo.wSectorsPerBlock)) + ????????????????(dwImageLength%(g_FlashInfo.wDataBytesPerSector*g_FlashInfo.wSectorsPerBlock) ? 1: 0); ??OALMSG(TRUE,dwNumBlocks)); ??while (dwNumBlocks--) ??{???? ????OALMSG(TRUE,dwBlock)); ????OALMSG(TRUE,g_FlashInfo.wSectorsPerBlock)); ????OALMSG(TRUE,dwBlock*g_FlashInfo.wSectorsPerBlock)); ????//BOOL ReadBlock(DWORD dwBlock,LPBYTE pbBlock,PSectorInfo pSectorInfoTable) ????if (!ReadBlock(dwBlock,(LPBYTE)dst,g_pSectorInfoBuf)) ????{ ??????OALMSG(OAL_ERROR,dwBlock)); ??????return(FALSE);???? ????} ????dst += g_FlashInfo.dwBytesPerBlock/4; ????++dwBlock; ??} ??OALMSG(TRUE,(TEXT("_ReadLogoFromBootMediarn"))); ??return TRUE; }
?????? 5、关于Logo数据的文件bin的生成，网上有很多工具可以实现，其实可以自己写一个应用程序完成该功能。本人编写了24位Bmp文件生成RGB565格式的bin文件的程序，这部分代码也可以在nand.app中写成一个函数，在写入Flash时调用转换为相应的RGB565数据即可，这样更新Logo时可以更直接。注意下载时的数据量是现在的3倍。
?????? 这里就不给出源代码了，如果需要，请留言。
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