WinCE6.0 修改开机Logo方法集锦(二)
发布时间:2020-12-15 18:31:01 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
?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
格式的内容也都是通过读取
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
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
1M
以内的图片数据。由于
Logo
占用了一定的
Block
空间,所以后面
Nk
的起始位置
RESERVED_BOOT_BLOCKS
需要向后移动。
???????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
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。
、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,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*g_FlashInfo.wSectorsPerBlock));? ????//BOOL ReadBlock(DWORD dwBlock,LPBYTE pbBlock,PSectorInfo pSectorInfoTable)? ????if (!ReadBlock(dwBlock,(LPBYTE)dst,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。
?
???????
今天就到这里,改天上实现方法二:将
Logo.bin
做成和
Eboot.bin
一样的格式,这样下载
Eboot.bin
的很多代码就可以直接使用。
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