lcd.c

本程序是基于5416DSP的液晶显示器控制实验

#define LCDDELAY 1
#define LCDCMDTURNON 0x3f
#define LCDCMDTURNOFF 0x3e
#define LCDCMDSTARTLINE 0xc0
#define LCDCMDPAGE 0xb8
#define LCDCMDVERADDRESS 0x40
#define REGISTERCLKMD (*(unsigned int *)0x58)
#define WAITSTATUS (*(unsigned int *)0x28)

ioport unsigned int port8000;
ioport unsigned int port8001;
ioport unsigned int port8002;
ioport unsigned int port8003;
ioport unsigned int port8004;
ioport unsigned int port8007;

void Delay(unsigned int nTime);		// 延时子程序
void TurnOnLCD();			// 打开显示
void LCDCLS();				// 清除屏幕显示内容

unsigned char ledkey[10][8]=
{
	{0x00,0x00,0x7C,0x82,0x82,0x82,0x7C,0x00},	//0
	{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}
};

main()
{
	int i,nCount=0,nBW=0;

	REGISTERCLKMD=0;
	port8000=0;		// 初始化ICETEK-CTR
	Delay(LCDDELAY);
	port8000=0x80;
	Delay(LCDDELAY);
	port8000=0;
	Delay(LCDDELAY);
	port8007=0;			// 关闭东西方向的交通灯
	Delay(LCDDELAY);
	port8007=0x40;	// 关闭南北方向的交通灯
	Delay(LCDDELAY);
	TurnOnLCD();				// 打开显示
	LCDCLS();				// 清除显示内存
	port8001=LCDCMDSTARTLINE;		// 设置显示起始行
	Delay(LCDDELAY);
	port8002=0;
	Delay(LCDDELAY);
	for (;;)
	{
		port8001=LCDCMDPAGE;		// 设置操作页=0
		Delay(LCDDELAY);
		port8002=0;
		Delay(LCDDELAY);
		port8001=LCDCMDVERADDRESS;	// 起始列=0
		Delay(LCDDELAY);
		port8002=0;
		Delay(LCDDELAY);
		for ( i=0;i<8;i++ )
		{
			port8003=( nBW==0 )?(ledkey[nCount][i]):(~ledkey[nCount][i]);	// 屏幕左侧第1至8行第i列赋值							port8002=0;			// (赋值后当前操作列自动加1，所以不需设置)
			Delay(LCDDELAY);
			port8002=0;
			Delay(LCDDELAY);
		}
		Delay(512);
		nCount++;
		if ( nCount==10 )
		{
			nCount=0;
			nBW=1-nBW;
		}
	}
}               

void Delay(unsigned int nDelay)
{
	int ii,jj,kk=0;
	for ( ii=0;ii<nDelay;ii++ )
	{
		for ( jj=0;jj<1024;jj++ )
		{
			kk++;
		}
	}
}

void TurnOnLCD()
{
	port8001=LCDCMDTURNON;
	Delay(LCDDELAY);
	port8002=0;
	Delay(1024);  
	port8001=LCDCMDSTARTLINE;
	Delay(LCDDELAY);
	port8002=0;
	Delay(LCDDELAY);
}

void LCDCLS()
{
	int i,j;
	port8001=LCDCMDSTARTLINE;
	Delay(LCDDELAY);
	port8002=0;
	Delay(LCDDELAY);
	for ( i=0;i<8;i++ )
	{
		port8001=LCDCMDPAGE+i;
		Delay(LCDDELAY);
		port8002=0;
		Delay(LCDDELAY);
		port8001=LCDCMDVERADDRESS;
		Delay(LCDDELAY);
		port8002=0;
		Delay(LCDDELAY);
		for ( j=0;j<64;j++ )
		{
			port8003=0;
			Delay(LCDDELAY);
			port8002=0;
			Delay(LCDDELAY);
		}
		port8001=LCDCMDPAGE+i;
		Delay(LCDDELAY);
		port8002=0;
		Delay(LCDDELAY);
		port8001=LCDCMDVERADDRESS;
		Delay(LCDDELAY);
		port8002=0;
		Delay(LCDDELAY);
		for ( j=0;j<64;j++ )
		{
			port8004=0;
			Delay(LCDDELAY);
			port8002=0;
			Delay(LCDDELAY);
		}
	}
}