key.c

DSP原程序 有多个数据包 下载学习之用

ioport unsigned int port8001;
ioport unsigned int port8005;

void Delay(unsigned int nTime);		// 延时子程序
void RefreshLEDArray();			// 刷新显示
void SetLEDArray(int nNumber);		// 修改显示内容
char ConvertScanToChar(unsigned char cScanCode);	// 将键盘扫描码转换为字符

unsigned char ledbuf[8],ledx[8];
unsigned char ledkey[16][8]=
{
	{0x00,0x00,0x7C,0x82,0x82,0x82,0x7C,0x00},
	{0x00,0x00,0x00,0x84,0xFE,0x80,0x00,0x00},	//1
	{0x00,0x00,0x84,0xC2,0xA2,0x92,0x8C,0x00},	//2
	{0x00,0x00,0x44,0x92,0x92,0x92,0x6C,0x00},
	{0x00,0x00,0x30,0x28,0x24,0xFE,0x20,0x00},
	{0x00,0x00,0x4E,0x92,0x92,0x92,0x62,0x00},
	{0x00,0x00,0x7C,0x92,0x92,0x92,0x64,0x00},
	{0x00,0x00,0x02,0xC2,0x32,0x0A,0x06,0x00},
	{0x00,0x00,0x6C,0x92,0x92,0x92,0x6C,0x00},
	{0x00,0x00,0x4C,0x92,0x92,0x92,0x7C,0x00},
	{0x00,0x00,0xF8,0x24,0x22,0x24,0xF8,0x00},
	{0x00,0x00,0xFE,0x92,0x92,0x92,0x6C,0x00},
	{0x00,0x00,0x7C,0x82,0x82,0x82,0x44,0x00},
	{0x00,0x00,0xFE,0x82,0x82,0x82,0x7C,0x00},
	{0x00,0x00,0xFE,0x92,0x92,0x92,0x92,0x00},
	{0x00,0x00,0xFE,0x12,0x12,0x12,0x12,0x00}
};
char KeyLUT[16]={ '0','1','2','3','4','5','6','7',
			'8','9','A','B','C','D','E','F'
		};

main()
{
	int nCount;
	unsigned int nScanCode,nKeyCode;
	unsigned char cKey;

	for ( nCount=0;nCount<8;nCount++ )
	{
		ledbuf[nCount]=0x0ff;		// 显示为空白
		ledx[nCount]=(1<<nCount);	// 生成显示列控制字
	}
	RefreshLEDArray();
	nCount=0;
	for (;;)
	{
		nScanCode=port8001;
		nScanCode&=0x0ff;
		if ( nScanCode!=0 )
		{
			cKey=ConvertScanToChar(nScanCode);
		}
		if ( nScanCode!=0 )
		{
			nKeyCode=( cKey>='0' && cKey<='9' )?(cKey-'0'):(cKey-'A'+10);
			SetLEDArray(nKeyCode);
		}
		Delay(16);
	}
}               

void Delay(unsigned int nDelay)
{
	int ii,jj,kk=0;
	for ( ii=0;ii<nDelay;ii++ )
	{
		for ( jj=0;jj<64;jj++ )
		{
			RefreshLEDArray();
			kk++;
		}
	}
}

void RefreshLEDArray()
{
	int i;
	for ( i=0;i<8;i++ )
	{
		port8005=ledx[i];
		port8005=ledbuf[i];
	}
}

void SetLEDArray(int nNumber)
{
	int i;
	for ( i=0;i<8;i++ )
		ledbuf[i]=~ledkey[nNumber][7-i];
}

char ConvertScanToChar(unsigned char cScanCode)
{
	int nWork;
	unsigned int uWork1,uWork2;
	 
	uWork1=uWork2=cScanCode;
	uWork1>>=4;
	uWork2&=0x0f;
	switch ( uWork1 )
	{
		case 1: nWork=0; break;
		case 2: nWork=4; break;
		case 4: nWork=8; break;
		case 8: nWork=12; break;
	}
	switch ( uWork2 )
	{
		case 1: nWork+=3; break;
		case 2: nWork+=2; break;
		case 4: nWork+=1; break;
	}
	return KeyLUT[nWork];
}