main.c

dsp中的模拟数字转换的算法

#include "myapp.h"
#include "ICETEK-VC5509-EDU.h"
#include "scancode.h"

void InitADC();

unsigned int nADC[256],nADC1[256];

main()
{
	int i;
	unsigned int uWork;
	
	CLK_init();
	SDRAM_init();
	InitCTR();
	SetDSPPLL(SPEED144MHz);
	while ( 1 )
	{
		for ( i=0;i<256;i++ )
		{
			ADCCTL=0x8000;	// 启动AD转换，通道0
			do
			{
				uWork=ADCDATA;
			} while ( uWork&0x8000 );
			nADC[i]=uWork&0x0fff;
		}
		for ( i=0;i<256;i++ )
		{
			ADCCTL=0x9000;	// 启动AD转换，通道1
			do
			{
				uWork=ADCDATA;
			} while ( uWork&0x8000 );
			nADC1[i]=uWork&0x0fff;
		}
		asm( " nop");
	}
}

void InitADC()
{
	ADCCLKCTL=0x23; // 4MHz ADCLK
	ADCCLKDIV=0x4f00;
}