vportcap.c

DM642四路图像采集存储程序

	VP_FSETH(vpCaptureHandle, VPCTL, VPHLT, VP_VPCTL_VPHLT_CLEAR);
	/* .............. */
	/* enable capture */
	/* .............. */
	/* set VCEN bit to enable capture，使能VCB口 */
	VP_FSETH(vpCaptureHandle, VCBCTL, VCEN, VP_VCBCTL_VCEN_ENABLE);
	/* clear BLKCAP in VCB_CTL to enable capture DMA events */
	VP_FSETH(vpCaptureHandle, VCBCTL, BLKCAP,VP_VCBCTL_BLKCAP_CLEAR);
	
	return (vpCaptureHandle);
}









VP_Handle bt656_8bit_ncfc( int portNumber)//VP0，VP1，VP2通道A初始化函数
{
	/* Open video port for capture ,打开一个视频端口*/
	vpCaptureHandle = VP_open(portNumber, VP_OPEN_RESET);
	if(vpCaptureHandle == INV)
	{
		return (VP_Handle)0xffff;
	}
	/* Enable video port functionality in VP Peripheral Control Reg(PCR)，使能视频端口*/
	VP_FSETH(vpCaptureHandle, PCR, PEREN, VP_PCR_PEREN_ENABLE);
	/* ..................... */
	/* Enable all interrupts */
	/* ..................... */
	/*便能VCA的中断源*/
	/* 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 video port global interrupt enable */
	VP_FSETH(vpCaptureHandle, VPIE, VIE, VP_VPIE_VIE_ENABLE);
	/* ...................... */
	/* Setup all other fields */
	/* ...................... */
	
	/* Enable short field detect，使能缺场探测*/
	VP_FSETH(vpCaptureHandle, VCACTL, SFDE, VP_VCACTL_SFDE_ENABLE);
	/* Set last pixel to be captured in Field1 (VCA_STOP1 reg) */
	/*设置第一场的最后一个像素的Y轴与X轴的坐标*/
	VP_RSETH(vpCaptureHandle, VCASTOP1,VP_VCASTOP1_RMK(VCA_YSTOP1, VCA_XSTOP1));
	/* Set last pixel to be captured in Field2 (VCA_STOP2 reg) */
	/*设置第二场的最后一个像素的Y轴与X轴的坐标*/
	VP_RSETH(vpCaptureHandle, VCASTOP2,VP_VCASTOP2_RMK(VCA_YSTOP2, VCA_XSTOP2));
	/* Set first pixel to be captured in Field1 (VCA_STRT1 reg) */
	/*设置第一场的第一个像素的Y轴与X轴的坐标*/
	VP_RSETH(vpCaptureHandle, VCASTRT1, VP_VCASTRT1_RMK(VCA_YSTART1,VP_VCASTRT1_SSE_ENABLE, VCA_XSTART1));
	/* Set first pixel to be captured in Field2 (VCA_STRT2 reg) */
	/*设置第二场的第一个像素的Y轴与X轴的坐标*/
	VP_RSETH(vpCaptureHandle, VCASTRT2,VP_VCASTRT2_RMK(VCA_YSTART2, VCA_XSTART2));
	/* Set threshold values ，设置EDMA启动的门限*/
	VP_RSETH(vpCaptureHandle, VCATHRLD,VP_VCATHRLD_RMK(VCA_THRLD_FIELD2, VCA_THRLD_FIELD1));
	/* Set capture event.register values，设置一场的需要的EDMA的次数 */
	VP_RSETH(vpCaptureHandle, VCAEVTCT,VP_VCAEVTCT_RMK(VCA_CAPEVT2,VCA_CAPEVT1));
	/* Vertical interrupts (VCA_INT) are not enabled in this example. */
	/* Set CMODE to 8.bit BT.656，采用BT656格式的数据流 */
	VP_FSETH(vpCaptureHandle, VCACTL, CMODE, VP_VCACTL_CMODE_BT656B);
	/* Set non.continuous frame capture，设置为电视显示格式的采集，即不连续的采集，
	   CON/FRAME/CF2/CF1的值为0100 */
	VP_FSETH(vpCaptureHandle, VCACTL, CON, VP_VCACTL_CON_DISABLE);
	VP_FSETH(vpCaptureHandle, VCACTL, FRAME, VP_VCACTL_FRAME_FRMCAP);
	VP_FSETH(vpCaptureHandle, VCACTL, CF2, VP_VCACTL_CF2_NONE);
	VP_FSETH(vpCaptureHandle, VCACTL, CF1, VP_VCACTL_CF1_NONE);
	/* Let FLDD and FINV to be their defaults */
	/* Set VRST to end of vertical blanking,VCOUNT复位在场消隐之后 */
	VP_FSETH(vpCaptureHandle, VCACTL, VRST, VP_VCACTL_VRST_V0EAV);
	/* Set HRST to start of horizontal blanking，行计数复位在EAV之后 */
	VP_FSETH(vpCaptureHandle, VCACTL, HRST, VP_VCACTL_HRST_OF(0));
	/* 10.bit pack mode(10BPK bit) in this 8.bit example */
	/* No (1/2) scaling and no chroma re.sampling in this example */
	/*初始化EDMA通路，由portNumber判断需要配置哪个DMA通道*/
	if(portNumber==0)
	IRQ_enable(IRQ_EVT_VINT1);
	else if(portNumber==1)
	IRQ_enable(IRQ_EVT_VINT1);
	else
	IRQ_enable(IRQ_EVT_VINT2);
	/* Enable video port interrupts */
	IRQ_enable(vpCaptureHandle->eventId);
	/*根据标志位判断需要设置的EDMA通路 Setup Y, Cb and Cr EDMA channels */
	if (portNumber==0)
	setupVPCapChaAEDMA0(portNumber);
	else if(portNumber==1)
	setupVPCapChaAEDMA1(portNumber);
	else if(portNumber==2&WV==0)
	setupVPCapChaAEDMA2(portNumber);

	/* Clear VPHLT in VP_CTL to make video port function，清除VPHLT位?
	   使能其它位 */
	VP_FSETH(vpCaptureHandle, VPCTL, VPHLT, VP_VPCTL_VPHLT_CLEAR);
	/* .............. */
	/* enable capture */
	/* .............. */
	/* set VCEN bit to enable capture，使能VCA口 */
	VP_FSETH(vpCaptureHandle, VCACTL, VCEN, VP_VCACTL_VCEN_ENABLE);
	/* clear BLKCAP in VCA_CTL to enable capture DMA events */
	VP_FSETH(vpCaptureHandle, VCACTL, BLKCAP,VP_VCACTL_BLKCAP_CLEAR);
	
	return (vpCaptureHandle);
}
/*******************************************************************/
/* Function : bt656_capture_start    							   */
/* Input(s) : VP_handle									           */
/* Description : Configures given video port for 8.bit BT.656 non. */
/* continuos frame capture on channel A.                           */
/*******************************************************************/
void bt656_capture_start(VP_Handle videoHandle)
{	
}
/*................................................................ */
/* Function : VPCapChaAIsr */
/* Description : This capture ISR clears FRMC to continue capture */
/* in this non.continuous mode and also clears other */
/* status bits. */
/*................................................................ */
interrupt void VPCapChaAIsr(void)
{
	Uint32 vpis = 0;
	/* Get video port status register value */
	vpis = VP_RGETH(vpCaptureHandle, VPIS);
	if(vpis & _VP_VPIS_CCMPA_MASK) /* capture complete */
	{
		/* Clear frame complete bit in VCX_CTL to continue capture in non-continuous mode*/
		VP_FSETH(vpCaptureHandle, VCASTAT, FRMC,VP_VCASTAT_FRMC_CLEAR);
		/* Clear CCMPA to enable next frame complete interrupts*/
		VP_FSETH(vpCaptureHandle, VPIS, CCMPA,VP_VPIS_CCMPA_CLEAR);
		capChaAFrameCount++; /* increment captured frame count */
		capNewFrame = 1;
	}
	if(vpis & _VP_VPIS_COVRA_MASK) /* overrun error */
	{
		capChaAOverrun++;
		VP_FSETH(vpCaptureHandle, VPIS, COVRA,VP_VPIS_COVRA_CLEAR);
	}
	if(vpis & _VP_VPIS_SERRA_MASK) /* synchronization error */
	{
		capChaASyncError++;
		VP_FSETH(vpCaptureHandle, VPIS, SERRA,VP_VPIS_SERRA_CLEAR);
	}
	if(vpis & _VP_VPIS_SFDA_MASK) /* short field detect */
	{
		capChaAShortFieldDetect++;
		VP_FSETH(vpCaptureHandle, VPIS, SFDA, VP_VPIS_SFDA_CLEAR);
	}
	if(vpis & _VP_VPIS_LFDA_MASK) /* long field detect */
	{
		capChaALongFieldDetect++;
		VP_FSETH(vpCaptureHandle, VPIS, LFDA, VP_VPIS_LFDA_CLEAR);
	}
}




interrupt void cap1(void)
{
    Uint32 vpis = 0;   
	/* Get video port status register value */
	vpis = VP_RGETH(vpCaptureHandle, VPIS);
	if(vpis & _VP_VPIS_CCMPA_MASK) /* capture complete */
	{
		/* Clear frame complete bit in VCX_CTL to continue capture in non-continuous mode*/
		VP_FSETH(vpCaptureHandle, VCASTAT, FRMC,VP_VCASTAT_FRMC_CLEAR);
		/* Clear CCMPA to enable next frame complete interrupts*/
		VP_FSETH(vpCaptureHandle, VPIS, CCMPA,VP_VPIS_CCMPA_CLEAR);
		capChaAFrameCount++; /* increment captured frame count */
		capNewFrame1 = 1;
	}
	if(vpis & _VP_VPIS_COVRA_MASK) /* overrun error */
	{
		capChaAOverrun++;
		VP_FSETH(vpCaptureHandle, VPIS, COVRA,VP_VPIS_COVRA_CLEAR);
	}
	if(vpis & _VP_VPIS_SERRA_MASK) /* synchronization error */
	{
		capChaASyncError++;
		VP_FSETH(vpCaptureHandle, VPIS, SERRA,VP_VPIS_SERRA_CLEAR);
	}
	if(vpis & _VP_VPIS_SFDA_MASK) /* short field detect */
	{
		capChaAShortFieldDetect++;
		VP_FSETH(vpCaptureHandle, VPIS, SFDA, VP_VPIS_SFDA_CLEAR);
	}
	if(vpis & _VP_VPIS_LFDA_MASK) /* long field detect */
	{
		capChaALongFieldDetect++;
		VP_FSETH(vpCaptureHandle, VPIS, LFDA, VP_VPIS_LFDA_CLEAR);
	}
}



interrupt void cap2(void)
{
    if(WV==0)
    {
    Uint32 vpis = 0;   
	/* Get video port status register value */
	vpis = VP_RGETH(vpCaptureHandle, VPIS);
	if(vpis & _VP_VPIS_CCMPA_MASK) /* capture complete */
	{
		/* Clear frame complete bit in VCX_CTL to continue capture in non-continuous mode*/
		VP_FSETH(vpCaptureHandle, VCASTAT, FRMC,VP_VCASTAT_FRMC_CLEAR);
		/* Clear CCMPA to enable next frame complete interrupts*/
		VP_FSETH(vpCaptureHandle, VPIS, CCMPA,VP_VPIS_CCMPA_CLEAR);
		capChaAFrameCount++; /* increment captured frame count */
		capNewFrame2 = 1;
	}
	if(vpis & _VP_VPIS_COVRA_MASK) /* overrun error */
	{
		capChaAOverrun++;
		VP_FSETH(vpCaptureHandle, VPIS, COVRA,VP_VPIS_COVRA_CLEAR);
	}
	if(vpis & _VP_VPIS_SERRA_MASK) /* synchronization error */
	{
		capChaASyncError++;
		VP_FSETH(vpCaptureHandle, VPIS, SERRA,VP_VPIS_SERRA_CLEAR);
	}
	if(vpis & _VP_VPIS_SFDA_MASK) /* short field detect */
	{
		capChaAShortFieldDetect++;
		VP_FSETH(vpCaptureHandle, VPIS, SFDA, VP_VPIS_SFDA_CLEAR);
	}
	if(vpis & _VP_VPIS_LFDA_MASK) /* long field detect */
	{
		capChaALongFieldDetect++;
		VP_FSETH(vpCaptureHandle, VPIS, LFDA, VP_VPIS_LFDA_CLEAR);
	}
	}
	if(WV==1)
	{
	Uint32 vpis = 0;
	/* Get video port status register value */
	vpis = VP_RGETH(vpCaptureHandle, VPIS);
	if(vpis & _VP_VPIS_CCMPB_MASK) /* capture complete */
	{
		/* Clear frame complete bit in VCX_CTL to continue capture in non-continuous mode*/
		VP_FSETH(vpCaptureHandle, VCBSTAT, FRMC,VP_VCBSTAT_FRMC_CLEAR);
		/* Clear CCMPA to enable next frame complete interrupts*/
		VP_FSETH(vpCaptureHandle, VPIS, CCMPB,VP_VPIS_CCMPA_CLEAR);
		capChaAFrameCount++; /* increment captured frame count */
		capNewFrame3 = 1;
	}
	if(vpis & _VP_VPIS_COVRB_MASK) /* overrun error */
	{
		capChaAOverrun++;
		VP_FSETH(vpCaptureHandle, VPIS, COVRB,VP_VPIS_COVRB_CLEAR);
	}
	if(vpis & _VP_VPIS_SERRA_MASK) /* synchronization error */
	{
		capChaASyncError++;
		VP_FSETH(vpCaptureHandle, VPIS, SERRB,VP_VPIS_SERRB_CLEAR);
	}
	if(vpis & _VP_VPIS_SFDA_MASK) /* short field detect */
	{
		capChaAShortFieldDetect++;
		VP_FSETH(vpCaptureHandle, VPIS, SFDB, VP_VPIS_SFDB_CLEAR);
	}
	if(vpis & _VP_VPIS_LFDA_MASK) /* long field detect */
	{
		capChaALongFieldDetect++;
		VP_FSETH(vpCaptureHandle, VPIS, LFDB, VP_VPIS_LFDB_CLEAR);
	}
	}
}





/*................................................................ */
/* Function : setupVPCapChaAEDMA(Int32 portNumber) */
/* Input(s) : portNumber, video port number i.e. 0, 1 or 2. */
/* Description : Sets up EDMA channels for Y, U, V events for */
/* channel A capture. */
/*功能描述：将为Y，U，V建立EDMA的通路*/
/*................................................................ */
void setupVPCapChaAEDMA0(int portNumber)//初始化VP0视频口的B通路对应的DMA通道
{
	Int32 YEvent, UEvent, VEvent;
	/* get channelA Y, U, V EDMA event numbers，选择触发事件 */
	switch(portNumber)
	{
		/*确定相应的DMA通路*/
		case VP_DEV0: 
			YEvent = EDMA_CHA_VP0EVTYA;
			UEvent = EDMA_CHA_VP0EVTUA;
			VEvent = EDMA_CHA_VP0EVTVA;
			break;
		case VP_DEV1: 
			YEvent = EDMA_CHA_VP1EVTYA;
			UEvent = EDMA_CHA_VP1EVTUA;
			VEvent = EDMA_CHA_VP1EVTVA;