vportcap1.c

基于DM642

//#define VCB_HBLNK_SIZE 138 /* (858-720),horizontal blanking */
//#define VCB_IMG_VSIZE1 244 /* (263-20+1), fld1 vertical image size */
//#define VCB_IMG_VSIZE2 243 /* (525-283+1), fld2 vertical image size */

/*PAL*/
#define VCB_HBLNK_SIZE 144 /* (864-720),horizontal blanking */
/*确定第一场图像的重直像素为288*/
#define VCB_IMG_VSIZE1 288 /* (311-24+1), fld1 vertical image size */
/*确定第一场图像的重直像素为288*/
#define VCB_IMG_VSIZE2 288 /* (625-338+1), fld2 vertical image size */

/*确定第一场图像的水平像素为720*/
#define VCB_IMG_HSIZE1 720 /* field1 horizontal image size */
/*确定第二场图像的水平像素为720*/
#define VCB_IMG_HSIZE2 720 /* field2 horizontal image size */

/* 确定一场像素的大小为720×288 */
#define VCB_IMAGE_SIZE1 (VCB_IMG_HSIZE1 * VCB_IMG_VSIZE1)
/* 确定二场像素的大小为720×288 */
#define VCB_IMAGE_SIZE2 (VCB_IMG_HSIZE2 * VCB_IMG_VSIZE2)
/* Define threshold values in double-words- Both fields should have same threshold value*/
/* 确定FIFO的事件的门槛，为一行的长度，因为DM642为64位DMA，所以长度/8 */
#define VCB_VDTHRLD1 (VCB_IMG_HSIZE1/8) /* line length in */
#define VCB_VDTHRLD2 VCB_VDTHRLD1 /* double-words */
/* ------------------------------------------------------- */
/* Define channel A capture window co-ordinates for Field1 */
/* ------------------------------------------------------- */
/*设置图像的采集框*/
/* HRST = 0, start of horizontal blanking，HCOUNT在EAV后复位
   即一行是从EAV之后开始 ，那行消隐在前，图像在后*/
#define VCB_XSTART1 (VCB_HBLNK_SIZE-2)/*EAV*/
#define VCB_XSTOP1 (VCB_XSTART1 + VCB_IMG_HSIZE1-1)
/* VRST = 1, end of vertical blanking */
#define VCB_YSTART1 1
#define VCB_YSTOP1 (VCB_YSTART1 + VCB_IMG_VSIZE1-1)

/* ------------------------------------------------------- */
/* Define channel A capture window co-ordinates for Field2 */
/* ------------------------------------------------------- */
/* HRST = 0, start of horizontal blanking */
#define VCB_XSTART2 (VCB_HBLNK_SIZE-2/*EAV*/)
#define VCB_XSTOP2 (VCB_XSTART2 + VCB_IMG_HSIZE2-1)
/* VRST = 1, end of vertical blanking */
#define VCB_YSTART2 1
#define VCB_YSTOP2 (VCB_YSTART2 + VCB_IMG_VSIZE2-1)

/* Define threshold values in double-words- Both fields should same threshold value */
/* 确定FIFO触发的长度*/
#define VCB_THRLD_FIELD1 (VCB_IMG_HSIZE1/8) /* line length in */
#define VCB_THRLD_FIELD2 VCB_THRLD_FIELD1 /* double-words */

/* Define number of events to be generated for field1 and field2 
   定义奇场（244）与偶场的行数（243）*/
#define VCB_CAPEVT1 (VCB_IMAGE_SIZE1 / (VCB_VDTHRLD1 * 8))
#define VCB_CAPEVT2 (VCB_IMAGE_SIZE2 / (VCB_VDTHRLD2 * 8))
/* in this example 定义采1帧  */
#define CAPCHA_FRAME_COUNT 1 
/* -------------------------------------------- */
/* EDMA parameters for capture Y event that are */
/* specific to this example- */
/* -------------------------------------------- */

/* because VCB_THRLD_FIELDn is in double-words and element size is 32-bit */
#define VCB_Y_EDMA_ELECNT (VCB_THRLD_FIELD1 * 2) 

#define VCB_Y_EDMA_FRMCNT ((VCB_CAPEVT1 + VCB_CAPEVT2) * CAPCHA_FRAME_COUNT)





/*NTSC*/
//#define VCA_HBLNK_SIZE 138 /* (858-720),horizontal blanking */
//#define VCA_IMG_VSIZE1 244 /* (263-20+1), fld1 vertical image size */
//#define VCA_IMG_VSIZE2 243 /* (525-283+1), fld2 vertical image size */

/*PAL*/
#define VCA_HBLNK_SIZE 144 /* (864-720),horizontal blanking */
/*确定第一场图像的重直像素为288*/
#define VCA_IMG_VSIZE1 288 /* (311-24+1), fld1 vertical image size */
/*确定第二场图像的重直像素为288*/
#define VCA_IMG_VSIZE2 288 /* (625-338+1), fld2 vertical image size */

/*确定第一场图像的水平像素为720*/
#define VCA_IMG_HSIZE1 720 /* field1 horizontal image size */
/*确定第二场图像的水平像素为720*/
#define VCA_IMG_HSIZE2 720 /* field2 horizontal image size */

/* 确定一场像素的大小为720×288 */
#define VCA_IMAGE_SIZE1 (VCA_IMG_HSIZE1 * VCA_IMG_VSIZE1)
/* 确定二场像素的大小为720×288 */
#define VCA_IMAGE_SIZE2 (VCA_IMG_HSIZE2 * VCA_IMG_VSIZE2)
/* Define threshold values in double-words- Both fields should have same threshold value*/
/* 确定FIFO的事件的门槛，为一行的长度，因为DM642为64位DMA，所以长度/8 */
#define VCA_VDTHRLD1 (VCA_IMG_HSIZE1/8) /* line length in */
#define VCA_VDTHRLD2 VCA_VDTHRLD1 /* double-words */
/* ------------------------------------------------------- */
/* Define channel A capture window co-ordinates for Field1 */
/* ------------------------------------------------------- */
/*设置图像的采集框*/
/* HRST = 0, start of horizontal blanking，HCOUNT在EAV后复位
   即一行是从EAV之后开始 ，那行消隐在前，图像在后*/
#define VCA_XSTART1 0//(VCA_HBLNK_SIZE-2)/*EAV*/
#define VCA_XSTOP1 (VCA_XSTART1 + VCA_IMG_HSIZE1-1)
/* VRST = 1, end of vertical blanking */
#define VCA_YSTART1 1
#define VCA_YSTOP1 (VCA_YSTART1 + VCA_IMG_VSIZE1-1)

/* ------------------------------------------------------- */
/* Define channel A capture window co-ordinates for Field2 */
/* ------------------------------------------------------- */
/* HRST = 0, start of horizontal blanking */
#define VCA_XSTART2 0//(VCA_HBLNK_SIZE-2/*EAV*/)
#define VCA_XSTOP2 (VCA_XSTART2 + VCA_IMG_HSIZE2-1)
/* VRST = 1, end of vertical blanking */
#define VCA_YSTART2 1
#define VCA_YSTOP2 (VCA_YSTART2 + VCA_IMG_VSIZE2-1)

/* Define threshold values in double-words- Both fields should same threshold value */
/* 确定FIFO触发的长度*/
#define VCA_THRLD_FIELD1 (VCA_IMG_HSIZE1/8) /* line length in */
#define VCA_THRLD_FIELD2 VCA_THRLD_FIELD1 /* double-words */

/* Define number of events to be generated for field1 and field2 
   定义奇场（288）与偶场的行数（288）*/
#define VCA_CAPEVT1 (VCA_IMAGE_SIZE1 / (VCA_VDTHRLD1 * 8))
#define VCA_CAPEVT2 (VCA_IMAGE_SIZE2 / (VCA_VDTHRLD2 * 8))
/* in this example 定义采1帧  */
#define CAPCHA_FRAME_COUNT 1 
/* -------------------------------------------- */
/* EDMA parameters for capture Y event that are */
/* specific to this example- */
/* -------------------------------------------- */

/* because VCA_THRLD_FIELDn is in double-words and element size is 32-bit */
#define VCA_Y_EDMA_ELECNT (VCA_THRLD_FIELD1 * 2) 

#define VCA_Y_EDMA_FRMCNT ((VCA_CAPEVT1 + VCA_CAPEVT2) * CAPCHA_FRAME_COUNT)
/******************************************************************/
/* Description : 8-bit BT-656 non-continuous frame capture 		  */
/* 																  */
/* Some important field descriptions:                             */
/*                                                                */
/* CMODE = 000, 8-bit BT-656 mode                                 */
/* CON = 0                                                        */
/* FRAME = 1, capture frame                                       */
/* CF2 = 0                                                        */
/* CF1 = 0, (8-bit non-continuous frame capture)                  */
/* SCALE = 0, no scaling                                          */
/* RESMPL= 0, no resampling                                       */
/* 10BPK = X, not used in 8-bit capture                           */
/* EXC = 0, use EAV/SAV codes                                     */
/* VRST = 1, end of vertical blanking                             */
/* HRST = 0, start of horizontal blanking                         */
/* FLDD = 0, 1st line EAV or FID input                            */
/* FINV = 0, no field invert                                      */
/* RDFE = X, used in Raw mode only(Enable field identification)   */
/* SSE = X, used in Raw mode only(Startup synch enable)           */
/******************************************************************/
#include <vportcap.h>
/*---------------------------------------------------------------- */
/* global variable declarations 								   */
/* --------------------------------------------------------------- */

	#pragma DATA_SECTION(capChaAYSpace, "-capChaAYSpace") 
	/* buffer to store captured Y-data */
	Uint8 capChaAYSpace[720*588]; 
	#pragma DATA_SECTION(capChaACbSpace, "-capChaACbSpace")
	/* buffer to store captured Cb-data */
	Uint8 capChaACbSpace[360*588]; 
	#pragma DATA_SECTION(capChaACrSpace, "-capChaACrSpace")
	/* buffer to store captured Cr-data */
	Uint8 capChaACrSpace[360*588];

	/* handle of vp that to be configured */
	VP_Handle vpCaptureHandle; 
	EDMA_Handle hEdmaVPCapChaAY;
	EDMA_Handle hEdmaVPCapChaACb;
	EDMA_Handle hEdmaVPCapChaACr;
	Int32 edmaCapChaAYTccNum = 0; /* EDMA tcc for Y channel */
	Int32 edmaCapChaACbTccNum = 0; /* EDMA tcc for Cb channel */
	Int32 edmaCapChaACrTccNum = 0; /* EDMA tcc for Cb channel */
	volatile Uint32 capChaAFrameCount = 0; /* no of frames captured */
	/* Error flags */
	volatile Uint32 capNewFrame = 0;
	volatile Uint32 capChaAOverrun = 0;
	volatile Uint32 capChaASyncError = 0;
	volatile Uint32 capChaAShortFieldDetect = 0;
	volatile Uint32 capChaALongFieldDetect = 0;
	volatile Uint32 capChaAField1Cnt = 0;
	volatile Uint32 capChaAField2Cnt = 0;
/* --------------------------------------------------------------- */
/* Function : bt656_8bit_ncfc */
/* Input(s) : portNumber, video port number i-e- 0, 1 or 2- */
/* Description : Configures given video port for 8-bit BT-656 non- */
/* continuos frame capture on channel A- */
/* --------------------------------------------------------------- */
VP_Handle bt656_8bit_ncfc(int portNumber)
{
		/* Open video port for capture */
		vpCaptureHandle = VP_open(portNumber, VP_OPEN_RESET);
		if(vpCaptureHandle == INV)
			return (VP_Handle)0xffff;
		/* Enable video port functionality in VP Peripheral */
		/* Control Reg(PCR) */
		VP_FSETH(vpCaptureHandle, PCR, PEREN, VP_PCR_PEREN_ENABLE);
		/* --------------------- */
		/* Enable all interrupts */
		/* --------------------- */
		/* Enable capture overrun interrupt(COVRA) for VP channel A */
		VP_FSETH(vpCaptureHandle, VPIE, COVRA, VP_VPIE_COVRA_ENABLE);
		/* Enable capture complete interrupt(CCMPA) for VP channel A */
		VP_FSETH(vpCaptureHandle, VPIE, CCMPA, VP_VPIE_CCMPA_ENABLE);
		/* Enable channel synchronization error interrupt(SERRA) for */
		/* VP channel A */
		VP_FSETH(vpCaptureHandle, VPIE, SERRA, VP_VPIE_SERRA_ENABLE);
		/* Enable short field detect interrupt(SFDA) for VP channel A */
		VP_FSETH(vpCaptureHandle, VPIE, SFDA, VP_VPIE_SFDA_ENABLE);
		/* Enable Vertical interrupt(VINTA1) for VP channel A */
		VP_FSETH(vpCaptureHandle, VPIE, VINTA1, VP_VPIE_VINTA1_ENABLE);
		/* Enable Vertical interrupt(VINTA2) for VP channel A */
		VP_FSETH(vpCaptureHandle, VPIE, VINTA2, VP_VPIE_VINTA2_ENABLE);
		/* Enable video port global interrupt enable */
		VP_FSETH(vpCaptureHandle, VPIE, VIE, VP_VPIE_VIE_ENABLE);
		
		/* ---------------------- */
		/* Setup all other fields */
		/* ---------------------- */
		/* Enable short field detect */