example_dps2812m_ad.c

合众达开发的2812板的测试例程

/* =================================================================================
File name:       	Example_DPS2812M_DA.C                    
                    
Originator:				SEED R&D Group
		
Description: 
                  DPS2812M Device Digital to Analog test program. 
=====================================================================================
 History:
-------------------------------------------------------------------------------------
 10-20-2005		Release	Rev 1.0         Jijunhui                                          
------------------------------------------------------------------------------*/

#include "DSP281x_Device.h"     // DSP281x Headerfile Include File
#include "DSP281x_Examples.h"   // DSP281x Examples Include File
#include "Example_DPS2812M_AD.H"
#include "Example_DPS2812M_DA.H"

DAC_DRV DAC=DAC_DRV_DEFAULTS;
ADC_DRV AD=ADC_DRV_DEFAULTS;

Uint16 EVAInterruptCount;
Uint16 temp[128],x=0,temp2[128];
unsigned int ADflag=1;
unsigned int channal=5;

interrupt void ADC_T1TOADC_isr(void);
interrupt void ADC_SampleINT(void);	
// ADC start parameters
//#define ADC_MODCLK 0x3   // HSPCLK = SYSCLKOUT/2*ADC_MODCLK2 = 150/(2*3)         = 25MHz
// Global variable for this example

void main(void)
{
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP281x_SysCtrl.c file.
   InitSysCtrl();
    
// Step 2. Initialize GPIO: 
// This example function is found in the DSP281x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio();   

// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts 
   DINT;
   IER=0x0000;
   IFR=0x0000;

// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.  
// This function is found in the DSP281x_PieCtrl.c file.
   InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:
   //IER = 0x0000;
   //IFR = 0x0000;

// Initialize the PIE vector table with pointers to the shell Interrupt 
// Service Routines (ISR).  
// This will populate the entire table, even if the interrupt
// is not used in this example.  This is useful for debug purposes.
// The shell ISR routines are found in DSP281x_DefaultIsr.c.
// This function is found in DSP281x_PieVect.c.
   InitPieVectTable();
   
// 初始化EVA定时器1   
   ADREG=0;
   EvaRegs.GPTCONA.all=0;
   
//设置通用目的定时器1的周期为0x200;
   EvaRegs.T1PR=0x0200;      	//周期
   EvaRegs.T1CMPR=0x0000;       //比较寄存器
   
//使能通用目的定时器1的周期中断
//向上计数、预定标x128、内部时钟、使能比较、使用自己的周期值
   EvaRegs.EVAIMRA.bit.T1PINT=1;   
   EvaRegs.EVAIFRA.bit.T1PINT=1; 
   
//清除通用目的定时器1的计数器值
   EvaRegs.T1CNT=0x0000;
   EvaRegs.T1CON.all=0x1742;
   
//当通用目的定时器1产生中断时启动ADC变换
   EvaRegs.GPTCONA.bit.T1TOADC=2;
   	
// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.  
   EALLOW;  // This is needed to write to EALLOW protected registers
   PieVectTable.T1PINT = &ADC_T1TOADC_isr;
   PieVectTable.XINT1  = &ADC_SampleINT;
   EDIS;    // This is needed to disable write to EALLOW protected registers
   
   XIntruptRegs.XINT1CR.all=0x0001;
   XIntruptRegs.XINT2CR.all=0x0001;
   PieCtrlRegs.PIEIER1.bit.INTx3=1;
   PieCtrlRegs.PIEIER1.bit.INTx4=1;
   PieCtrlRegs.PIEIER2.all=M_INT4;
// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP281x_InitPeripherals.c
// InitPeripherals(); 
	DAC.DACChannelSel=0x00;
    DAC.DACDataCycle=128;
    DAC.DACDataOffset=0;
    DAC.DataSel=0;
// Step 5. User specific code, enable interrupts:
   // Step 5. User specific code, enable interrupts:
   IER |=(M_INT2|0x0001);
   
// Enable global Interrupts and higher priority real-time debug events:
   EINT;   // Enable Global interrupt INTM
   ERTM;   // Enable Global realtime interrupt DBGM

   for(;;)
   {
     if(AD.ADCFlag.bit.ADCSampleFlag==1)
     {
     		if(AD.LoopVar>=128) AD.LoopVar=0;
     		//AD.ADChannelSel=0;
     		if(ADflag==0)
   				ADCSmplePro(&AD);
   			//AD.LoopVar++;
   			AD.ADCFlag.bit.ADCSampleFlag=0;
     }
   }
}

interrupt void ADC_T1TOADC_isr(void)
{
    if(ADflag==1)
	{
		DAC.DACPro(&DAC);
		ADflag=0;
		*AD_CONVST=0;
		EvaRegs.EVAIMRA.bit.T1PINT=1;
		EvaRegs.EVAIFRA .all =BIT7;
	} 
	PieCtrlRegs.PIEACK .all =PIEACK_GROUP2;
	return;
}

interrupt void ADC_SampleINT(void)
{
	XIntruptRegs.XINT1CR .all =0x0000;
	AD.ADCFlag.bit.ADCSampleFlag=1;
	XIntruptRegs.XINT1CR .all =0x0001;
	PieCtrlRegs.PIEACK .all =PIEACK_GROUP1;	
	return;
}

void ADCSmplePro(ADC_DRV *v)
{
    unsigned int Temp1;
    if(v->ADChannelSel==6) v->ADChannelSel=0;
    if(v->ADCFlag.bit.ADCCS0==1)
    {
		v->ADSampleResult0[x]=*AD_CHIPSEL0;
		v->ADSampleResult1[x]=*AD_CHIPSEL0;
		v->ADSampleResult2[x]=*AD_CHIPSEL0;
		v->ADSampleResult3[x]=*AD_CHIPSEL0;
		v->ADSampleResult4[x]=*AD_CHIPSEL0;
		v->ADSampleResult5[x]=*AD_CHIPSEL0;
	}
	if(v->ADCFlag.bit.ADCCS1==1)
    {
		v->ADSampleResult0[x]=*AD_CHIPSEL1;
		v->ADSampleResult1[x]=*AD_CHIPSEL1;
		v->ADSampleResult2[x]=*AD_CHIPSEL1;
		v->ADSampleResult3[x]=*AD_CHIPSEL1;
		v->ADSampleResult4[x]=*AD_CHIPSEL1;
		v->ADSampleResult5[x]=*AD_CHIPSEL1;
	}	
    if(channal==0)
    {
    	Temp1=v->ADSampleResult0[x];
    }
    else if(channal==1)
    {
    	Temp1=v->ADSampleResult1[x];
    }
    else if(channal==2)
    {
    	Temp1=v->ADSampleResult2[x];
    }
    else if(channal==3)
    {
    	Temp1=v->ADSampleResult3[x];
    }
    else if(channal==4)
    {
    	Temp1=v->ADSampleResult4[x];
    }
    else if(channal==5)
    {
    	Temp1=v->ADSampleResult5[x];
    }
    if(Temp1>32768)
    	temp2[x]=0-Temp1;
    else
    	temp2[x]=Temp1;
    ADflag=1;
    x++;
    if(x>=128)
		x=0;
	
}

void DAC_Core(DAC_DRV *v)
{
	 Uint16 OutData;

	 /*********************************************************/
	 /*data processing                                        */
	 /*********************************************************/
	 if(v->DataSel==0)
	 {
	   if((v->DACDataOffset>100)||(v->DACDataOffset<-100))
	    	v->DACDataOffset=0;
	   else 
	   	    OutData=65536*(v->DACDataOffset/10+10)/20;
	 }
	 else if(v->DataSel==1)
	 {
	 	OutData=(int)((sin((v->DACCycleCount)/6.2832)/2+1)*32767);
	 }
	 else if(v->DataSel==2)
	 {
	 	float TempVar;
	 	TempVar=v->DACDataCycle/2;
	 	TempVar=(abs(v->DACDataCycle/2-v->DACCycleCount))/(TempVar);
	 	OutData=(int)((TempVar)*32767)+16384;
	 }  
	 else
	    OutData=0; 
   	 temp[x]=OutData;

	 /*********************************************************/
	 /*DATA OUT                                               */
	 /*********************************************************/
	 switch(v->DACChannelSel)
	 {
	 	case 0:
	 	{
	 		*DA_CHANNEL0=OutData;
	 	}break;
	 	
	 	case 1:
	 	{
	 		*DA_CHANNEL1=OutData;
	 	}break;
	 	
	 	case 2:
	 	{
	 		*DA_CHANNEL2=OutData;
	 	}break;
	 	
	 	case 3:
	 	{
	 		*DA_CHANNEL3=OutData;
	 	}break;
	 	
	 	case 4:
	 	{
	 	    *DA_CHANNEL0 = v->DACch0Data;
	 		*DA_CHANNEL1 = v->DACch1Data;
	 		*DA_CHANNEL2 = v->DACch2Data;
	 		*DA_CHANNEL3 = v->DACch3Data;
	 	}break;
	 	
	 	default:
	 	{
	 		*DA_CHANNEL0=OutData;
	 		*DA_CHANNEL1=OutData;
	 		*DA_CHANNEL2=OutData;
	 		*DA_CHANNEL3=OutData;
	 	}break;
	 }
	

	 *DA_OUT=0;
	 
	 /*********************************************************/
	 /*DATA cycle                                             */
	 /*********************************************************/
	 if(v->DACCycleCount<v->DACDataCycle)
	 	v->DACCycleCount++;
	 else 
	 	v->DACCycleCount=0;
}
//===========================================================================
// No more.
//===========================================================================