ad.c

dsp2812的源程序

// A/D 转换实验

#include <stdio.h>
#include "DSP28_Device.h"
#include "DSP28_Globalprototypes.h"

unsigned int a2=0;
float a1,adclo=0.0;
unsigned int n1,n2;

unsigned int Discode[16]={0x3F,0x06,0x5B,0x4F,
						  0x66,0x6D,0x7D,0x07,
						  0x7F,0x6F,0x77,0x7C,
						  0x39,0x3E,0x79,0x71
						  };// 0-9及A-F的显示代码

// Prototype statements for functions found within this file.

interrupt void ad(void);
void Gpio_select(void);
void Display(void);
void delay_loop(void);

void main(void)
{


	InitSysCtrl();

	DINT;
	IER = 0x0000;
	IFR = 0x0000;

	InitPieCtrl();


	InitPieVectTable();	
			
	Gpio_select();
	
	GpioDataRegs.GPADAT.all=0x00FF;
	
	EALLOW;	// This is needed to write to EALLOW protected registers
	PieVectTable.ADCINT=&ad;
	EDIS;   // This is needed to disable write to EALLOW protected registers
    
    InitAdc();

    // Enable INT14 which is connected to CPU-Timer 2:
	IER |= M_INT1;
	//KickDog();
    // Enable global Interrupts and higher priority real-time debug events:
	
	EINT;   // Enable Global interrupt INTM
	ERTM;	// Enable Global realtime interrupt DBGM
	while(AdcRegs.ADC_ST_FLAG.bit.SEQ1_BSY==0)
		{			

			AdcRegs.ADCTRL2.bit.SOC_SEQ1=1;

		}

	for(;;)
	{
			KickDog();
	}
} 	


interrupt void ad(void)
{
	IFR=0x0000;
//	PieCtrl.PIEIFR1.all = 0;
	PieCtrl.PIEACK.all=0xffff;
	a2++;
	a1=((float)AdcRegs.RESULT0)*3.0/65520.0+adclo;

	n1=(int)(a1/0.03)%10;
	n2=(int)(a1/0.3);
	if(n2==10)	 n2=9;
	if(n2==9 && (a1/0.03)==100)   n1=9;
	Display();
	
	AdcRegs.ADC_ST_FLAG.bit.INT_SEQ1_CLR=1;
	AdcRegs.ADCTRL2.bit.SOC_SEQ1=1;
	EINT;
	
}

void Gpio_select(void)
{
	EALLOW;
	 
	GpioMuxRegs.GPAMUX.all=0x0000;
	GpioMuxRegs.GPDMUX.all=0x0000;									
    GpioMuxRegs.GPADIR.all=0xC7FF;		// GPIO PORTs  as output
	GpioMuxRegs.GPDDIR.all=0xC7FF;
    GpioMuxRegs.GPAQUAL.all=0x0000;  		// Set GPIO input qualifier values
 	GpioMuxRegs.GPDQUAL.all=0x0000;
    EDIS;
     
} 


void Display() 
{
	GpioDataRegs.GPADAT.all =Discode[n2];
 	GpioDataRegs.GPDDAT.bit.GPIOD1=1;  
   	delay_loop();
	GpioDataRegs.GPDDAT.bit.GPIOD1=0;  
 
	GpioDataRegs.GPADAT.all =Discode[n1];
  	GpioDataRegs.GPDDAT.bit.GPIOD0=1;
    delay_loop();
    GpioDataRegs.GPDDAT.bit.GPIOD0=0;   
}
void delay_loop()
{
	short k;
	for(k=0;k<1000;k++) {}
}

//===========================================================================
// End Of The Program.
//===========================================================================