cputimer.c

来自「DEC_2812的最简单测试程序,在原来的程序上经过更改」· C语言 代码 · 共 90 行

/************************************************************************************
	版权(c) 	2003-		北京合众达电子技术有限责任公司			                *
*  	设计者：	戴展波	
*************************************************************************************/
#include "DSP28_Device.h"
#include "ext_inf.h"
unsigned int Led_Flag;
unsigned int count=0;
Uint32 countbetween=0;
Uint32 countold=0;
Uint32 countnew=0;

interrupt void ISRTimer2(void);

void main(void)
{

	/*初始化系统*/
	InitSysCtrl();

	/*关中断*/
	DINT;
	IER = 0x0000;
	IFR = 0x0000;
	Led_Flag = 0;

	/*初始化PIE*/
	InitPieCtrl();

	/*初始化PIE中断矢量表*/
	InitPieVectTable();	
	
	/*初始化外设*/
    InitPeripherals();
    

	EALLOW;	
	PieVectTable.TINT2 = &ISRTimer2;
	EDIS;   
    
	/*设置CPU*/
	ConfigCpuTimer(&CpuTimer2, 150, 50000);	
 	StartCpuTimer2();

    /*开中断*/
	IER |= M_INT14;

	EINT;   // Enable Global interrupt INTM
	ERTM;	// Enable Global realtime interrupt DBGM
    
    countold=CpuTimer2.RegsAddr->TPR.all;
	for(;;);

} 	

interrupt void ISRTimer2(void)
{

	CpuTimer2.InterruptCount++;
	
	
	countnew=CpuTimer2.RegsAddr->TIM.all;
	countbetween=countold-countnew;
	countold=countnew;

	if(Led_Flag == 1)
	{
		countold=CpuTimer2.InterruptCount;
		
		*LED2 = 0;
		
		LED1_ON;
		count++;
		Led_Flag = 0;
		
	}
	else
	{
		*LED2 = 1;
		LED1_OFF;
		Led_Flag = 1;
	}
	

}

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