main.c

键盘示例程序

/*************************************************************************
	filename:	main.c		键盘测试程序
	designer:	黄黎明
	date:		2004/12/24
*************************************************************************/

#include "DSP28_Device.h"

interrupt void Scan(void);
void KeyValue(unsigned int k);
unsigned int  Save_keyvalue[9] = {0,0,0,0,0,0,0,0,0};
unsigned int  a,k,x;
unsigned int  flag[9] = {0,0,0,0,0,0,0,0,0};

void main(void)
{

	a = 0;
	x = 0;

	//初始化系统
	InitSysCtrl();
	
	//关中断
	DINT;
	IER = 0x0000;
	IFR = 0x0000;
	
	//初始化PIE
    InitPieCtrl();
    
    //初始化PIE中断矢量表
	InitPieVectTable();	
	
	//初始化CPUtimer
	InitCpuTimers();
	
	//设置timer0中断入口地址
    EALLOW;
    PieVectTable.TINT0 = &Scan;
	EDIS;
	
	ConfigureCputimer();
	
	Setport();
    
    //使能中断
    PieCtrl.PIEIER1.bit.INTx7 = 1;/*使能cputimer0中断*/
    

	//启动CpuTimer0
	StartCpuTimer0();
	
	/*开中断*/
	IER |= M_INT1;

	EINT;   //使能INTM
	ERTM;	

	for(;;)
	{
		if(x != 0)
		{
			Save_keyvalue[x-1] = x;
			a++;
			x = 0;
		}
	
	}

}

interrupt void Scan(void)
{
	GpioDataRegs.GPBDAT.bit.GPIOB13 = 0;
	GpioDataRegs.GPBDAT.bit.GPIOB14 = 1;
	GpioDataRegs.GPBDAT.bit.GPIOB15 = 1;
	KeyValue(1);
	
	GpioDataRegs.GPBDAT.bit.GPIOB13 = 1;
	GpioDataRegs.GPBDAT.bit.GPIOB14 = 0;
	GpioDataRegs.GPBDAT.bit.GPIOB15 = 1;
	KeyValue(2);
		
	GpioDataRegs.GPBDAT.bit.GPIOB13 = 1;
	GpioDataRegs.GPBDAT.bit.GPIOB14 = 1;
	GpioDataRegs.GPBDAT.bit.GPIOB15 = 0;
	KeyValue(3);	
	
	PieCtrl.PIEACK.bit.ACK7 = 1;
	EINT;

}

void KeyValue(unsigned int k)	
{	
	if(GpioDataRegs.GPADAT.bit.GPIOA8 == 1)
	{	
		flag[k-1] = 0; 	
	}
	else
	{
		if(flag[k-1] == 0)
		{
			x = k;
			flag[k-1] = 1;
		}
	}
	
	if(GpioDataRegs.GPADAT.bit.GPIOA9 == 1)		
	{	
		flag[k+2] = 0; 	
	}
	else
	{
		if(flag[k+2] == 0)
		{
			x = k+3;
			flag[k+2] = 1;
		}
	}
	
	if(GpioDataRegs.GPADAT.bit.GPIOA10 == 1)		
	{	
		flag[k+5] = 0; 	
	}
	else
	{
		if(flag[k+5] == 0)
		{
			x = k+6;
			flag[k+5] = 1;
		}
	}
}