jsq.c

本程序能够在dsp2812的开发板上实现按键控制计数

// 倒数计时器实验

#include "DSP28_Device.h"
#include "DSP28_Globalprototypes.h"

interrupt void ISRTimer1(void);
interrupt void ISRTimer2(void);

void delay_loop(void);	 //短延时子程序
void delay_loop1(void);  //长延时子程序
void Gpio_select(void);  //设置GPIO端口
void Display(void);   	 //显示子程序

unsigned int cont1=1;	 //十位数设置
unsigned int cont2=0;	 //个位数设置
unsigned int Set_Flag;
//unsigned int Stop_Flag=0;
long int k;

unsigned int Discode[16]={0x3F,0x06,0x5B,0x4F,
						  0x66,0x6D,0x7D,0x07,
						  0x7F,0x6F,0x77,0x7C,
						  0x39,0x3E,0x79,0x71
						  };// 0-9及A-F的显示代码				

void main(void)
{

	InitSysCtrl();

	// Disable and clear all CPU interrupts:
	DINT;
	IER = 0x0000;
	IFR = 0x0000;

	InitPieCtrl();
	InitPieVectTable();	
	InitCpuTimers();
	
	EALLOW;	
	PieVectTable.XINT13 = &ISRTimer1;
	PieVectTable.TINT2  = &ISRTimer2;
	EDIS;   
	
	IER |= M_INT13;
	IER |= M_INT14;
	
	EINT;   
	ERTM;

	Gpio_select();	

	while(1)
	{
	Display();//显示初始数据
	
	//设置记数值
	if(GpioDataRegs.GPADAT.bit.GPIOA12==0)
	 	{ 
		Set_Flag=0;
  		Display();	
		ConfigCpuTimer(&CpuTimer1, 150, 1000);  
		StartCpuTimer1();
		}	
 
	if(GpioDataRegs.GPADAT.bit.GPIOA13==0)
		{ 
		Set_Flag=1;
		Display();
		ConfigCpuTimer(&CpuTimer1, 150, 1000);  
		StartCpuTimer1();
		}	

	//倒计数判断
	if(GpioDataRegs.GPADAT.bit.GPIOA11==0)
		{ 
		ConfigCpuTimer(&CpuTimer2, 150, 1000000);  
		StartCpuTimer2();
		}
	}
} 	


void Gpio_select(void)
{
	EALLOW;	 
	GpioMuxRegs.GPAMUX.all=0x0000;
	GpioMuxRegs.GPDMUX.all=0x0000;									
    GpioMuxRegs.GPADIR.all=0xC7FF;		//Set GPIOA PORTs DIR
    GpioMuxRegs.GPDDIR.all=0xC7FF;		//Set GPIOD PORTs DIR
    GpioMuxRegs.GPAQUAL.all=0x0000;  	// Set GPIOA input qualifier values
	GpioMuxRegs.GPDQUAL.all=0x0000;		// Set GPIOD input qualifier values 
    EDIS;
}



void Display() 
{
	GpioDataRegs.GPADAT.all =Discode[cont1];//显示十位数
 	GpioDataRegs.GPDDAT.bit.GPIOD1=1;  
   	delay_loop();
	GpioDataRegs.GPDDAT.bit.GPIOD1=0;  
 
	GpioDataRegs.GPADAT.all =Discode[cont2];//显示个位数
  	GpioDataRegs.GPDDAT.bit.GPIOD0=1;
    delay_loop();
    GpioDataRegs.GPDDAT.bit.GPIOD0=0;   
}


//CUPTimer1中断服务子程序
interrupt void ISRTimer1(void)
{
	StopCpuTimer1(); 
	
	//个位数设定
	if( Set_Flag==1)
		{
		if(cont2==9)	cont2=0;	
		else			cont2++;
		}
	
	//十位数设定
	if( Set_Flag==0)
		{ 
		if(cont1==9)	cont1=0;
		else			cont1++;
		}
	Display();
}


//CUPTimer2中断服务子程序
interrupt void ISRTimer2(void)	//倒计数
{
//	CpuTimer2.InterruptCount++;

 	if(cont2!=0)				//个位减
		cont2--;
	else
	 if(cont1!=0)	//十位减
		{	
		cont2=9;
		cont1--;
		}	
    
    if(cont1==0 && cont2==0)	//中止并复位
		{	  
		StopCpuTimer2();
		Display();
		
		GpioDataRegs.GPADAT.bit.GPIOA7=1;	//蜂鸣器置位
		GpioDataRegs.GPADAT.bit.GPIOA14=1;	//发光管置位 
		delay_loop1();	
		
		GpioDataRegs.GPADAT.bit.GPIOA14=0;	
		GpioDataRegs.GPADAT.bit.GPIOA15=0;		
		}
	Display();
 
}


void delay_loop()
{
	for(k=0;k<1000;k++) {}
}

void delay_loop1()
{
	for(k=0;k<11000000; k++) {}
}


//===========================================================================
// End Of Program.
//===========================================================================