ad.c

TMS320C6713DSP模数转换程序源代码

#include"ICETEK-C6713-A.h"

#define AD_CTL       *(unsigned char*)0x90100006
#define AD_DATA_BASE          0x90140000
#define ORDER         2
#define AD_CHA0      *(unsigned short int*)(AD_DATA_BASE+0*ORDER)
#define AD_CHC0      *(unsigned short int*)(AD_DATA_BASE+1*ORDER)
#define AD_CHB0      *(unsigned short int*)(AD_DATA_BASE+2*ORDER)
#define AD_CHA1      *(unsigned short int*)(AD_DATA_BASE+4*ORDER)
#define AD_CHC1      *(unsigned short int*)(AD_DATA_BASE+5*ORDER)
#define AD_CHB1      *(unsigned short int*)(AD_DATA_BASE+6*ORDER)

void interrupt Timer( void );
void initInterrupt(void);
unsigned short int a,b,c,d,e,f;
short int nChannelA0[256],nChannelA1[256];
short int nAD0[256],nAD1[256];
int nPointNumber;
main()
{
//	unsigned char dbScanCode;

    nPointNumber=0;
    init_emif();	// 初始化emif
    InitCTR();		// 初始化ICETEK-CTR
    initInterrupt();
	while ( 1 )
	{
	}
}
void interrupt Timer( void )
{
     int i;
     short int nWork;
     
     a= AD_CHA0 ;
     b= AD_CHA1 ;
     c= AD_CHB0 ;
     d= AD_CHB1 ;
     e= AD_CHC0 ;
     f= AD_CHC1 ; 
     if ( (a&0x8000)&&(b&0x8000) )	// 数据有效性判断
     {
		a<<=4; nWork=a; nWork/=16;	// 去除高4位
		nChannelA0[nPointNumber]=nWork;
		b<<=4; nWork=b; nWork/=16;	// 去除高4位
		nChannelA1[nPointNumber]=nWork;
		nPointNumber++;
		if ( nPointNumber>=256 )
		{
			for ( i=0;i<256;i++ )
			{
				nAD0[i]=nChannelA0[i];
				nAD1[i]=nChannelA1[i];
			}
			nPointNumber=0;		// 软中断位置
		}
     }
     AD_CTL = 0x0;	// 发送控制脉冲信号，进行下次转换 如果只需A0,A1通道只需送6即可
     for (i=0;i<50;i++);
     AD_CTL = 0x7;	// 产生高电平
}
void initInterrupt(void)
{
	// 设置中断控制寄存器
	CSR&=0xfffffffe;	// 关中断 GIE=0
	ISTP=0x00000c00;	// 重置中断向量表到0C00h
   	IMH=0x08000000;		// 指定Timer1产生int15中断
   	IML=0;
   	ICR=0xff;			// 清除等待的中断
	IER=0x8003;			// 使能int15中断
	// 设置定时器产生中断信号的频率
	TIMER1PRD=0x1000;	// 定时器1的周期=0x1000
	TIMER1CTL=0x3c0;	// 开始计数
	CSR=CSR|1; 			// 开中断
}