icetek-dm642-pci.c

基于DM642的视频图象处理-边缘检测(Sobel 算子)源码1（VDParamForPAL.c）

#include "ICETEK-DM642-PCI.h"
#pragma DATA_SECTION(nMemTemp, ".INTPROCBUFF");
#pragma DATA_ALIGN(nMemTemp,128);
unsigned char nMemTemp[720];
#pragma DATA_SECTION(cLines, ".INTPROCBUFF");
#pragma DATA_ALIGN(cLines,128);
unsigned char cLines[MWIDTH*3];
int mi,mj,m_nWork1,m_nWork2;
unsigned int m_nWork,*pWork,m_nOffset1,m_nOffset2,m_nOffset3;
unsigned char *pImg1,*pImg2,*pImg3;
unsigned char x1,x2,x3,x4,x5,x6,x7,x8,x9;
#pragma DATA_SECTION(cBuffer, ".INTPROCBUFF");
#pragma DATA_ALIGN(cBuffer,128);
unsigned char cBuffer[9],cWork;



void ICETEKDM642PCIBoardInit()
{
	m_nOffset1=0;
	m_nOffset2=MWIDTH;
	m_nOffset3=MWIDTH*2;
	for ( mi=0;mi<MWIDTH*2;mi++ )
		cLines[mi]=0;
}

#pragma CODE_SECTION(ICETEKDM642PCISobel,".text1")
void ICETEKDM642PCISobel()
{
	unsigned int m_nID;
	
    m_nID=DAT_copy(nMemTemp+180,cLines+m_nOffset3,MWIDTH);
	pImg1=cLines; pImg1+=m_nOffset1;
	pImg2=cLines; pImg2+=m_nOffset2;
	pImg3=cLines; pImg3+=m_nOffset3;
	x1=(*pImg1); pImg1++; x2=(*pImg1); pImg1++;
	x4=(*pImg2); pImg2++; x5=(*pImg2); pImg2++;
	x7=(*pImg3); pImg3++; x8=(*pImg3); pImg3++;
	for ( mi=0;mi<MWIDTH;mi++,pImg1++,pImg2++,pImg3++ )
	{
		x3=(*pImg1); x6=(*pImg2); x9=(*pImg3);
		m_nWork1=x7+x8+x8-x2-x2-x3;
		m_nWork2=x3+x6+x6-x4-x4-x7;
		if ( m_nWork1<m_nWork2 )
			m_nWork1=m_nWork2;
		m_nWork2=m_nWork1+x9-x1;
		if ( m_nWork2>255 )	m_nWork2=255;
		else if ( m_nWork2<0 )	m_nWork2=0;
		nMemTemp[mi+180]=m_nWork2;
		x1=x2; x2=x3;
		x4=x5; x5=x6;
		x7=x8; x8=x9;
	}
	nMemTemp[mi]=0;
	m_nWork=m_nOffset1; m_nOffset1=m_nOffset2;
	m_nOffset2=m_nOffset3; m_nOffset3=m_nWork;
}

void mInitVPort()
{
	unsigned long int ii;
	
    /* Unlock PERCFG through PCFGLOCK */
    *((unsigned long *)0x1b3f018) = 0x10c0010c;
    
    /* Enable VP0-VP2, I2C and McASP0 in PERCFG */
    *((unsigned long *)0x1b3f000) = 0x78;

    /* Read back PERCFG */
    ii = *((unsigned long *)0x1b3f000);
    
    /* Wait at least 128 CPU cycles */
    EVMDM642_wait(128);

	*((unsigned long *)0x1c400c0)=0x8000; //reset vport0
	*((unsigned long *)0x1c440c0)=0x8000; //reset vport1
    EVMDM642_wait(256);
	*((unsigned long *)0x1c400c0)=0x00001; //enable double chn
	*((unsigned long *)0x1c440c0)=0x00001; //enable double chn
    EVMDM642_wait(256);
}