example_dps2812m_da.c

TMS320F2812控制DAC7744驱动程序

/* =================================================================================
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_DA.H"

unsigned int temp[256],x;

DAC_DRV DAC=DAC_DRV_DEFAULTS;
const   long 	Tp = 7500;			//PeriodCounter=ControlPeriod*Freq(us*M);HISPCP  
const   long	CPUTime_T0 = 100;       	   //CPU定时时间

interrupt void cpu_timer0_isr(void);	

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. Initalize 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();  // Skipped for this example  


// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts 
   DINT;

// 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();

// 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.TINT0 = &cpu_timer0_isr;
   EDIS;    // This is needed to disable write to EALLOW protected registers

// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP281x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
   InitCpuTimers();   // For this example, only initialize the Cpu Timers

// Configure CPU-Timer 0 to interrupt every second:
// 100MHz CPU Freq, 1 second Period (in uSeconds)
   ConfigCpuTimer(&CpuTimer0, 150, CPUTime_T0);   
   StartCpuTimer0();

// Step 5. User specific code, enable interrupts:


// Enable CPU INT1 which is connected to CPU-Timer 0:
   IER |= M_INT1;

// Enable TINT0 in the PIE: Group 1 interrupt 7
   PieCtrlRegs.PIEIER1.bit.INTx7 = 1;

// Enable global Interrupts and higher priority real-time debug events:
   EINT;   // Enable Global interrupt INTM
   ERTM;   // Enable Global realtime interrupt DBGM

// Step 6. IDLE loop. Just sit and loop forever (optional):
   for(;;)
   {
   		//KickDog();
   };

} 
    
	
interrupt void cpu_timer0_isr(void)
{
   //DAC.DACChannelSel=0x05;
   //DAC.DACDataCycle=100;
   //DAC.DACDataOffset=0;
   //DAC.DataSel=1;
   DAC.DACPro(&DAC); 

   PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;	

}

void DAC_Core(DAC_DRV *v)
{
	 unsigned int OutData;
     v->DataSel=1;
	 /*********************************************************/
	 /*data processing                                        */
	 /*********************************************************/
	 if(v->DataSel==0)
	 {
	   if((v->DACDataOffset>100)||(v->DACDataOffset<-100))
	    	v->DACDataOffset=0;
	   else 
	   	    OutData=328*v->DACDataOffset+REF;
	 }
	 else if(v->DataSel==1)
	 {
	 	OutData=(int)((sin((v->DACCycleCount)/6.28)+1)*REF);
	 }
	 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;
	 if(x>=256)
	 	x=0;
	 /*********************************************************/
	 /*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.
//===========================================================================