sindata.c

本程序通过F2812实现SPWM,开发平台CCS

#include "DSP281x_Device.h"     // DSP281x Headerfile Include File
#include "DSP281x_Examples.h"   // DSP281x Examples Include File
#include "float.h"
#include "math.h"	
volatile Uint16 angel_step,*Dataram=(Uint16*)0x100000;//RAM 起始地址为0X100000
volatile float sindata,angel;   /*k代表角度*/
//延时
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 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();
   angel_step=0;
   while(1)
   {if(Dataram<(Uint16*)0x107a13)//256K
    {angel=180.0/31250*angel_step;
     angel=3.1415926*angel;
     angel=angel/180;/*数据类型优先级,sin弧度计算*/
     sindata=sin(angel);
     sindata=sindata*1024;
     sindata=sindata+1024;
     sindata=sindata*32;
     if(sindata>=65536)
       {*Dataram++=65535;
        angel_step++;
       }
     else 
       {*Dataram++=sindata;
        angel_step++;
       }
    }
    else
    asm(" nop");
   }                       

}
//===========================================================================
// No more.
//=====