dac.c

初学DSP2812 的AD和DA得演示程序

#include "DSP28_Device.h"

float	ADResult[16];
unsigned int a2=0;
float	adclo=0.0;


#define  SPI_SEL_REG  *(unsigned  int*)0x2004 
#define  DA_SPI    0X03

interrupt void ad(void);
void WriteDAC(unsigned data);
void delay(unsigned int);

void main(void)
{
	unsigned char temp;
    
	InitSysCtrl();				//初始化系统

	DINT;						//关中断
	IER = 0x0000;
	IFR = 0x0000;


   
	InitPieCtrl();				//初始化PIE控制寄存器
	InitPieVectTable();			//初始化PIE参数表
	InitSpi();
	EALLOW;	
	PieVectTable.ADCINT=&ad;
	EDIS;   
    SPI_SEL_REG=DA_SPI;
    WriteDAC(0x300);
    InitAdc();					//初始化ADC
  	IER |= M_INT1;				// Enable INT14 which is connected to CPU-Timer 2:

	EINT;  						// Enable INTM
	ERTM;						// Enable DBGM
    
	while(AdcRegs.ADC_ST_FLAG.bit.SEQ1_BSY==0)
	{			
		AdcRegs.ADCTRL2.bit.SOC_SEQ1=1;
	}

	GpioDataRegs.GPASET.all|=0x8000;
    temp=46;
	 
	for(;;)
	{
		KickDog();
		   

	}

} 	

void WriteDAC(unsigned data)
{
	if(Spi_TxReady() == 1)
		SpiaRegs.SPITXBUF = data;
	delay(10000);
	if(Spi_TxReady() == 1)
		SpiaRegs.SPITXBUF = data;
	delay(50000);
	
}

void delay(unsigned int t)
{
	while(t>0)
    	t--;
}

interrupt void ad(void)
{
    adclo=5;				
	IFR=0x0000;

	PieCtrl.PIEACK.all=0xffff;
	a2++;
	ADResult[0]=((AdcRegs.RESULT0>>4)*3)/4095.0+adclo;
	ADResult[1]=((AdcRegs.RESULT1>>4)*3)/4095.0+adclo;
	ADResult[2]=((AdcRegs.RESULT2>>4)*3)/4095.0+adclo;
	ADResult[3]=((AdcRegs.RESULT3>>4)*3)/4095.0+adclo;
	ADResult[4]=((AdcRegs.RESULT4>>4)*3)/4095.0+adclo;
	ADResult[5]=((AdcRegs.RESULT5>>4)*3)/4095.0+adclo;
	ADResult[6]=((AdcRegs.RESULT6>>4)*3)/4095.0+adclo;
	ADResult[7]=((AdcRegs.RESULT7>>4)*3)/4095.0+adclo;
	ADResult[8]=((AdcRegs.RESULT8>>4)*3)/4095.0+adclo;
	ADResult[9]=((AdcRegs.RESULT9>>4)*3)/4095.0+adclo;
	ADResult[10]=((AdcRegs.RESULT10>>4)*3)/4095.0+adclo;
	ADResult[11]=((AdcRegs.RESULT11>>4)*3)/4095.0+adclo;
	ADResult[12]=((AdcRegs.RESULT12>>4)*3)/4095.0+adclo;
	ADResult[13]=((AdcRegs.RESULT13>>4)*3)/4095.0+adclo;
	ADResult[14]=((AdcRegs.RESULT14>>4)*3)/4095.0+adclo;
	ADResult[15]=((AdcRegs.RESULT15>>4)*3)/4095.0+adclo;
	AdcRegs.ADC_ST_FLAG.bit.INT_SEQ1_CLR=1;
	AdcRegs.ADCTRL2.bit.SOC_SEQ1=1; //在这儿设断点
	EINT;
	
}