DM642学习笔记程序注释.docx

1、DM642学习笔记程序注释张伟刚 QQ:263298490用的是瑞泰创新的实验箱（ICETEK-DM642-IDK-M），主要是视频处理部分的程序注释及思考题思路。DM642视频驱动程序的注释：/* * Copyright 2003 by Texas Instruments Incorporated. * All rights reserved. Property of Texas Instruments Incorporated. * Restricted rights to use, duplicate or disclose this code are * granted through

2、 contract. * */* (#) DDK 1.10.00.23 07-02-03 (ddk-b12) */#include /如果使用C语言，必须将此文件作为第一个头文件#include #include #include #include #include /使用CSL库，要用到的一些头文件，可参考CSL#include /视频驱动头文件#include #include #include #include #include #include #include /芯片头文件#include colorbar.h/如果显示彩色滚动条，就必须有此头文件；否则不需要#include evm

3、dm642_vcapparams.h#include evmdm642_vdisparams.h /* heap IDs defined in the BIOS configuration file */extern Int EXTERNALHEAP;/DSP/BIOS/* * = main = */main() /*/ /* open CSL DAT module for fast copy */ /*/ CSL_init(); /调用任何CSL库中的函数，必须先在此调用函数 CACHE_clean(CACHE_L2ALL, 0, 0); /清洗Cache模式 CACHE_setL2Mode

4、(CACHE_256KCACHE); /设置Cache模式CACHE_enableCaching(CACHE_EMIFA_CE00); /使能EMIFA CE0空间CACHE_enableCaching(CACHE_EMIFA_CE01); /使能EMIFA CE1空间 DAT_open(DAT_CHAANY, DAT_PRI_LOW, DAT_OPEN_2D); /打开数据传输/* * = tskVideoLoopback = * video loopback function. */void tskVideoLoopback() Int i; int m_nWork; Int status

5、; FVID_Handle disChan; /设置设备句柄 Int frames = 0; FVID_Frame *disFrameBuf; Int numLinesDis = EVMDM642_vDisParamsChan.imgVSizeFld1;/设置显示的行数，VGA为480，PAL为576Int numLinesCap =EVMDM642_vCapParamsChan.fldYStop1 - /设置采集行数 EVMDM642_vCapParamsChan.fldYStrt1+1; /*判断是显示区域大，还是采集区域大，取其小者*/ Int numLines = (numLinesD

6、is numLinesCap) ? numLinesCap : numLinesDis;#ifdef _LOOPBACK FVID_Handle capChan; /*设置每行显示的像素数，PAL制为720*/ Int numPixels = EVMDM642_vCapParamsChan.fldXStop1 - EVMDM642_vCapParamsChan.fldXStrt1+1; FVID_Frame *capFrameBuf; /*设置采集图像一行的总像素*/ Int capLinePitch = EVMDM642_vCapParamsChan.fldXStop1 - EVMDM642

7、_vCapParamsChan.fldXStrt1+1; /*设置显示图像一行的总像素*/ Int disLinePitch = EVMDM642_vDisParamsChan.imgHSizeFld1;#ifdef _PIP VPORTCAP_Params EVMDM642_vCapParamsChan2 = EVMDM642_vCapParamsChan; FVID_Handle capChan2; FVID_Frame *capFrameBuf2; Int yPitch = capLinePitch 1; Int cPitch = (capLinePitch 2) + 7) & ( 7)

8、;#endif#endif numLines *= 2; /* both fields */如果输出为PAL制,前面numLinesCap不要*2,这里再*2？ /*/ /* allocate both capture and display frame buffers */ /* in external heap memory */ /*/ /*分配采集和显示图像的存放缓冲区*/ EVMDM642_vCapParamsChan.segId = EXTERNALHEAP; EVMDM642_vDisParamsChan.segId = EXTERNALHEAP; EVMDM642_vDisPa

9、ramsSAA7105.hI2C = EVMDM642_I2C_hI2C; EVMDM642_vCapParamsSAA7115.hI2C = EVMDM642_I2C_hI2C; /*/ /* initialization of capture driver */ /*/ /*建立并初始化采集设备对象*/#ifdef _LOOPBACK capChan = FVID_create(/VP0CAPTURE/A/0, IOM_INPUT, &status, (Ptr)&EVMDM642_vCapParamsChan, NULL);#ifdef _PIP EVMDM642_vCapParamsCh

10、an2.scale = VPORT_SCALING_ENABLE; EVMDM642_vCapParamsChan2.fldOp = VPORT_FLDOP_FLD1; EVMDM642_vCapParamsChan2.thrld =1; capChan2 = FVID_create(/VP1CAPTURE/A/1, IOM_INPUT, &status, (Ptr)&EVMDM642_vCapParamsChan2, NULL);#endif #endif /*/ /* initialization of display driver */ /*/ /*建立并初始化显示设备对象*/ disC

11、han = FVID_create(/VP2DISPLAY, IOM_OUTPUT, &status, (Ptr)&EVMDM642_vDisParamsChan, NULL); /*/ /* configure video encoder & decoder */ /*/ for ( m_nWork=0;m_nWork6;m_nWork+ )/这里的循环有何用？一直没有弄清楚 /*为保证采集和显示设备正常工作，为其设置驱动*/ FVID_control(disChan, VPORT_CMD_EDC_BASE + EDC_CONFIG, (Ptr)&EVMDM642_vDisParamsSAA

12、7105);#ifdef _LOOPBACK FVID_control(capChan, VPORT_CMD_EDC_BASE + EDC_CONFIG, (Ptr)&EVMDM642_vCapParamsSAA7115);#ifdef _PIP EVMDM642_vCapParamsSAA7115.aFmt = SAA7115_AFMT_COMPOSITE; FVID_control(capChan2, VPORT_CMD_EDC_BASE+EDC_CONFIG, (Ptr)&EVMDM642_vCapParamsSAA7115);#endif#endif /*/ /* start capt

13、ure & display operation */ /*/ /*开始采集和显示操作*/ FVID_control(disChan, VPORT_CMD_START, NULL);#ifdef _LOOPBACK FVID_control(capChan, VPORT_CMD_START, NULL);#ifdef _PIP FVID_control(capChan2, VPORT_CMD_START, NULL);#endif #endif /*/ /* request a frame buffer from display & capture driver */ /*/ /*分配采集和显示

14、一帧图像存放的缓冲区*/ FVID_alloc(disChan, &disFrameBuf);#ifdef _LOOPBACK FVID_alloc(capChan, &capFrameBuf);#ifdef _PIP FVID_alloc(capChan2, &capFrameBuf2);#endif #endif frames +; while(1)/* loop forever */#ifdef _LOOPBACK /* copy data from capture buffer to display buffer */ /*/ /*将采集缓冲区的内容复制到显示缓冲区*/ for(i =

15、 0; i frame.iFrm.y1 + i * capLinePitch, disFrameBuf-frame.iFrm.y1 + i * disLinePitch, numPixels); DAT_copy(capFrameBuf-frame.iFrm.cb1 + i * (capLinePitch 1), disFrameBuf-frame.iFrm.cb1 + i * (disLinePitch 1), numPixels1); DAT_copy(capFrameBuf-frame.iFrm.cr1 + i * (capLinePitch 1), disFrameBuf-frame.

16、iFrm.cr1 + i * (disLinePitch 1), numPixels1); #ifdef _PIP for(i = 0; i 1); i +) DAT_copy(capFrameBuf2-frame.iFrm.y1 + i * yPitch, disFrameBuf-frame.iFrm.y1 + i * disLinePitch + (disLinePitch 1), (numPixels1); DAT_copy(capFrameBuf2-frame.iFrm.cb1 + i * cPitch, disFrameBuf-frame.iFrm.cb1 + i * (disLin

17、ePitch 1) + (disLinePitch 2 ), (numPixels 2); DAT_copy(capFrameBuf2-frame.iFrm.cr1 + i * cPitch, disFrameBuf-frame.iFrm.cr1 + i * (disLinePitch 1) +(disLinePitch 2), (numPixels 2); #endif DAT_wait(DAT_XFRID_WAITALL); FVID_exchange(capChan, &capFrameBuf);/采集一帧图像#ifdef _PIP FVID_exchange(capChan2, &ca

18、pFrameBuf2);#endif#else /如果定义CAPTURE则填充图像缓冲区为8条带 fillFrmBuf(&disFrameBuf-frame.iFrm, EVMDM642_vDisParamsChan.imgHSizeFld1, EVMDM642_vDisParamsChan.imgVSizeFld1 + EVMDM642_vDisParamsChan.imgVSizeFld2, frames % 360);#endif FVID_exchange(disChan, &disFrameBuf);/将显示缓冲区中一帧图像送给显示设备 frames +; /处理下一帧图像 实验5.

19、20 视频图像处理-取反1将程序改成屏幕1/4进行取反，而其他不变在主程序中ICETEKDM642PCIImageProcessReverse()函数前加if(i(numLines/2)，即：if(i(numLines/2) ICETEKDM642PCIImageProcessReverse();并将ICETEKDM642PCIImageProcessReverse()函数中的循环体改为如下： for ( i=0;i720/2;i+ ) nMemTempi=nMemTempi;2例程中处理了亮度信号，以下是处理色差信号：for ( i = 0; i frame.iFrm.cb1+i*(capL

20、inePitch1),nMemTemp,numPixels1);DAT_wait(m_nID);ICETEKDM642PCIImageProcessReverse();DAT_copy(nMemTemp,disFrameBuf-frame.iFrm.cb1+i*(disLinePitch1),numPixels1); for ( m_nWork=0;m_nWork1;m_nWork+ ) nMemTempm_nWork=0x080; DAT_copy(nMemTemp,disFrameBuf-frame.iFrm.y1+i*disLinePitch,numPixels); DAT_copy(n

21、MemTemp,disFrameBuf-frame.iFrm.cr1+i*(disLinePitch1),numPixels1);出现的问题：图像显示时右半屏有闪烁？实验5.21 视频图像处理-直方图统计程序注释：源程序中定义的js变量不知为何用，于是就删除了#include ICETEK-DM642-PCI.h/工作变量#pragma DATA_SECTION(nMemTemp, .INTPROCBUFF);#pragma DATA_ALIGN(nMemTemp,128);unsigned char nMemTemp720;#pragma DATA_SECTION(nHisto, .INTP

22、ROCBUFF);#pragma DATA_ALIGN(nHisto,128);unsigned int nHisto256;unsigned char imgHistoHISTOHIGH*HISTOWIDTH;/128*256int mi,mj,m_nWork1;unsigned int m_nWork,*pWork;unsigned char *pImg,*pImg1;void ICETEKDM642PCIBoardInit()/直方图显示区域初始化 for ( mi=0;miHISTOHIGH*HISTOWIDTH;mi+ ) imgHistomi=1; for ( mi=0;mi256

23、;mi+ ) nHistomi=0;#pragma CODE_SECTION(ICETEKDM642PCIStatistic,.text1)void ICETEKDM642PCIStatistic()/统计一帧图像的直方图 int i; for ( i=0;i720;i+ ) nHistonMemTempi+; #pragma CODE_SECTION(ICETEKDM642PCIHistogram,.text1)void ICETEKDM642PCIHistogram()/将统计的一帧图像的直方图显示在显示区域上 m_nWork=0; for ( mi=0;mi256;mi+ )/找出各灰度

24、级别像素总数最大的 if ( m_nWorknHistomi ) m_nWork=nHistomi; m_nWork/=(HISTOHIGH-1);/求出比例因子（即像素总数最大值/显示区域的高度） for ( mi=0;mi256;mi+ )/转换各灰度级，将其映射到显示区域（即：各个灰度级的像素/比例因子） nHistomi/=m_nWork; for ( mi=0;miHISTOHIGH*HISTOWIDTH;mi+ )/将显示区域置白 imgHistomi=1; pImg = imgHisto; /pImg指针指向显示区域首地址 pImg += (HISTOHIGH-1)*HISTOW

25、IDTH); /mImg指针指向显示区域尾地址 pImg+;/? for ( mi=1;mi255;mi+,pImg+ ) for ( mj=0,pImg1=pImg;mjnHistomi;mj+,pImg1-=HISTOWIDTH ) (*pImg1)=HISTOCOLOR;/对应的显示区域填充颜色，这里还是不太明白 for ( mi=0;mi256;mi+ ) /清除直方图统计的数组 nHistomi=0;实验5.22 视频图像处理-直方图均衡化增强程序注释：直方图均衡化，其实质是图像增强的一种。#include math.h#include ICETEK-DM642-PCI.h/工作变量

26、#pragma DATA_SECTION(nMemTemp, .INTPROCBUFF);#pragma DATA_ALIGN(nMemTemp,128);unsigned char nMemTemp720;#pragma DATA_SECTION(fHisto, .INTPROCBUFF);#pragma DATA_ALIGN(fHisto,128);float fHisto256;/#pragma DATA_SECTION(lut, .INTPROCBUFF);#pragma DATA_ALIGN(lut,128);unsigned char lut256;/保存新的灰度级，是通过上一帧图像计算的int mi,mj,m_nWork1;unsigned int m_nWork,*pWork,js;unsigned char *pImg,*pImg1;float m_fWork;void ICETEKDM642PCIBoardInit() js