adc.c

这是基于5402DSP的C语言程序

/////////////////////////////////////////////////
//  Example For ICETEK-VC5416-EDU              //
//          CTR Version : V4                   //
//  Filename: ADC.c                            //
//  Project : ADC.pjt                          //
//  Version : 2.00                             //
//  Write by: Daniel Hawk                      //
//  Company : Realtimedsp Co.Ltd               //
//                                             //
//  All Rights opened & no Onus  2005.06       //
/////////////////////////////////////////////////
#include "c5416regs.h"  

#define	TIM		*(int *)0x24
#define	PRD     *(int *)0x25
#define	TCR		*(int *)0x26
#define REGISTERCLKMD *(int *)0x58

ioport unsigned int port3002;
#define LBDS port3002
ioport unsigned int port3006;
void interrupt time(void);
void initMcBSP2( void );
unsigned int nCount;
int flage;
int uWork;
int inp[256];
int length;
int channel;
main()
{
	int j;
	asm("	ssbx	INTM");	// 关闭可屏蔽中断
	*(int *)0x58=0x0;	

	j= PMST; 		      
	PMST = j&0xff;
	
	IMR = 0x8;
	TCR = 0x417;		// 计数器分频系数=8
	TIM = 8;
	PRD = 0x157;		
	TCR = 0x427;		//                         
	IFR = 0x100;		//   其中，时钟周期为8MHz

    flage=0;
    channel=0;
    port3006=1;
    *(int *)0x58=0x1007;
    initMcBSP2();
	asm("	rsbx	INTM");	// 开中断进行转换
      
	while ( 1 );
}

// 定时器中断服务程序，完成：保存转换结果、启动下次转换
void interrupt time(void)	
{
    if(channel)
    {
        DXR12=0xe000;
    }
    else
    {
        DXR12=0xc000;
    }
    /*DXR12=0xe000;*/
    uWork=DRR12;
    uWork=uWork>>4;
    uWork&=0xff;
    inp[length]=uWork;
    length++;
    length%=256;
    if(length==0)
    {
        asm(" nop");    //此处设软件断点
    }
    LBDS=flage;
    flage=1-flage;

}

void initMcBSP2( void )/*configuation the McBSP1 as SPI mode*/
{  
    SPSA2=SPCR1;
    SPSD2=0;     
    SPSA2=SPCR2; 
    SPSD2=0;
    SPSA2=RCR1;
    SPSD2=0x40;
    SPSA2=RCR2;
    SPSD2=0x01;
    SPSA2=XCR1;
    SPSD2=0x40;
    SPSA2=XCR2;
    SPSD2=0x01;
    SPSA2=SRGR1;
    SPSD2=0x83;//
    SPSA2=SRGR2;
    SPSD2=0x2000;
    SPSA2=PCR;
    SPSD2=0xA08;
    SPSA2=SPCR1;
    SPSD2=0x5801;     
    SPSA2=SPCR2; 
    SPSD2=0xc1;

}