example_281xgpiotoggle.c

基于TI公司的dsp芯片TMS320F2812读写外扩空间的源代码

//###########################################################################
//
// FILE:    DS18B20.c
//
//###########################################################################

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


void main(void)
{

// Define a Variable
   unsigned int *Pointer=(unsigned int *)0x2000;
   unsigned int Count;   
// Step 1. Initialize System Control registers, PLL, WatchDog, 
// peripheral Clocks to default state:
// This function is found in the DSP281x_SysCtrl.c file.
   InitSysCtrl();



// 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();
   InitXintf();
// Step 6. User specific code
   for(Count=0;Count<=0xFF;Count++)
      {
      *Pointer=0x55AA;
      Pointer++;
      }

    

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