key.c

在CCS环境下基于TMS320C5416开发的小键盘输入数字并在LED显示器上显示出来的课程设计。

#include "scancode1.h"

#define REGISTERCLKMD (*(unsigned int *)0x58)
ioport unsigned int port8000;
ioport unsigned int port8001;
ioport unsigned int port8002;
ioport unsigned int port8005;
ioport unsigned int port8007;

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 int nScreenBuffer[1024];
unsigned char ledbuf[8],ledx[8];
unsigned char ledkey[10][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}
};
unsigned int uPort8000;

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

	REGISTERCLKMD=0;
	port8000=0;		// 初始化ICETEK-CTR
	port8000=0x80;
	port8000=0;
	port8007=0;			// 关闭东西方向的交通灯
	port8007=0x40;	// 关闭南北方向的交通灯
        port8007=0xc1;  //打开发光二级管
	uPort8000=port8002;		// 清键盘缓冲区
	for ( nCount=0;nCount<8;nCount++ )
	{
		ledbuf[nCount]=0x0ff;		// 显示为空白
		ledx[nCount]=(nCount<<4);	// 生成显示列控制字
	}
	RefreshLEDArray();
	nCount=nCursorCount=0;
	
	for (;;)
	{
		nScanCode=port8001;
		nScanCode&=0x0ff;
		uPort8000=port8002;
		if ( nScanCode!=0 && nScanCode!=0x0ff )
		{
			if ( nScanCode==SCANCODE_Enter )	break;
			else
			{
				cKey=ConvertScanToChar(nScanCode);
				if ( cKey!=0 )
				{
					nKeyCode=cKey-'0';
					SetLEDArray(nKeyCode);
				}
			}
		}
		Delay(16);
		nCursorCount++; nCursorCount%=4;
		if ( nCursorCount==0 )	ledbuf[7]^=0x80;
	}
	for ( nCount=0;nCount<8;nCount++ )
	{
		ledbuf[nCount]=0x0ff;		// 显示为空白
		ledx[nCount]=(nCount<<4);	// 生成显示列控制字
	}
	RefreshLEDArray();
	exit(0);
}

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++ )
	{
		port8000=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)
{
	char cReturn;
	
	cReturn=0;
	switch ( cScanCode )
	{
		case SCANCODE_0: cReturn='0'; break;
		case SCANCODE_1: cReturn='1'; break;
		case SCANCODE_2: cReturn='2'; break;
		case SCANCODE_3: cReturn='3'; break;
		case SCANCODE_4: cReturn='4'; break;
		case SCANCODE_5: cReturn='5'; break;
		case SCANCODE_6: cReturn='6'; break;
		case SCANCODE_7: cReturn='7'; break;
		case SCANCODE_8: cReturn='8'; break;
		case SCANCODE_9: cReturn='9'; break;
	}
	 
	return cReturn;
}