mymain.c

一个28系列dsp应用的程序,包括adc,cpu_timer,pwm,gpio,sci,spi等模块

#include "DSP281x_Device.h"     // DSP281x Headerfile Include File
#include "DSP281x_Examples.h"   // DSP281x Examples Include File
#include "math.h"


#define   POINTMAX   64
  
  int pwmdata[POINTMAX];
  int pwmcount=0;
  int peak=0x0237;
  int spidata;
  int datainflag;
  
   //
  int spibuf[100];
  int spicount;
  //
  double buffer[100];
  int bufcount;
  double lpfbuf[100];
  int lpfcount;
  double temp_bpf[1];
  double temp_lpf[1];
 int testnum,j;
 int txstate;
interrupt void sciarxint_isr(void);
interrupt void spirxint_isr(void);
interrupt void t1ufint_isr(void);  
 void writeint(int dwdata);
 void filterc(double b[],double a[],int n,int ns,double x[],int len,double px[],double py[]);
//   
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP281x_SysCtrl.c file.
 void main(void)
{ 
 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();  
  
   
// 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();
   
	/*设置中断服务程序入口地址*/
	EALLOW;	// This is needed to write to EALLOW protected registers

	PieVectTable.RXAINT = &sciarxint_isr;
	PieVectTable.SPIRXINTA=&spirxint_isr;
	PieVectTable.T1UFINT=&t1ufint_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();
  GpioDataRegs.GPFCLEAR.bit.GPIOF14=1;  //SET XF=0;clear for set 0
  GpioDataRegs.GPFSET.bit.GPIOF14=1;    //SET XF=1;
  GpioDataRegs.GPFCLEAR.bit.GPIOF6=1;    //cal  signal
  datainflag=0;
  	/*开中断*/
  IER |= (M_INT9 | M_INT6 | M_INT2);
  EINT;   // Enable Global interrupt INTM
  ERTM;	// Enable Global realtime interrupt DBGM
// Step 6. IDLE loop. Just sit and loop forever (optional):
EvaRegs.T1CON.bit.TENABLE=1;   //启动定时器1
   for(;;)   
   {
   	 		for(testnum=-300;testnum<300;testnum++)//for delay
   	 		{for(j=-200;j<200;j++);}                   //for delay  
   	   		while(!(((txstate=SciaRegs.SCIFFTX.all)&0x1f00)==0))
   			{;}
   			writeint(85); 
   	      if (GpioDataRegs.GPFDAT.bit.GPIOF14==1)
   	        { 
   	          GpioDataRegs.GPFCLEAR.bit.GPIOF14=1;//adcov1(dsp2810)--led is off   2005.10.29
   	        }
   	      else
   	       {
   	          GpioDataRegs.GPFSET.bit.GPIOF14=1; //adcov1(dsp2810)--led is on     2005.10.29
   	       }
   	        
   	}
 
}



interrupt void spirxint_isr(void)
{
	PieCtrlRegs.PIEACK.bit.ACK6=1;
	spidata=SpiaRegs.SPIRXBUF;
	
	
		if(spicount<100)
	{
	spibuf[spicount]=spidata;
	spicount++;
	}
	
	datainflag=1; 			   			   			  			
     
	EINT;
}


interrupt void sciarxint_isr(void)
 {
	PieCtrlRegs.PIEACK.bit.ACK9=1;

 
	if(SciaRegs.SCIRXST.bit.RXRDY==1)
	{
	
	SciaRegs.SCITXBUF=SciaRegs.SCIRXBUF.all;


	}
	
	EINT;
	

 }


interrupt void t1ufint_isr(void)   // EV-A
{
  PieCtrlRegs.PIEACK.bit.ACK2=1;
  EvaRegs.CMPR1=pwmdata[pwmcount];
	pwmcount++;
	if(pwmcount>=POINTMAX)
	
		{	
		pwmcount=0;
		}
		
//	EvaRegs.EVAIMRA.bit.T1UFINT=1;
	EvaRegs.EVAIFRA.bit.T1UFINT=1;

	EINT;
}


void writeint(int dwdata)
{
	//SciaRegs.SCITXBUF=0xFF;	
	SciaRegs.SCITXBUF=dwdata;	
	//dwdata=(dwdata>>8);	
	//SciaRegs.SCITXBUF=dwdata;	
}