lcd.c

2808程序

/******************************************************
** 功能描述:该程序对CF12864液晶屏进行初始化并开启显示 
*****************************************************/ 
#include "DSP280x_Device.h"

#define	 LCD_DI   GpioDataRegs.GPADAT.bit.GPIO10 //指令/数据，低为数据
#define	 LCD_RW   GpioDataRegs.GPADAT.bit.GPIO9 //读/写，低为写
#define	 LCD_E    GpioDataRegs.GPADAT.bit.GPIO8 //使能信号，下降沿写入

char table1[300]={       
0x08,0x08,0x0A,0xEA,0xAA,0xAA,0xAA,0xFF,0xA9,0xA9,0xA9,0xE9,0x08,0x08,0x08,0x00,
0x40,0x40,0x48,0x4B,0x4A,0x4A,0x4A,0x7F,0x4A,0x4A,0x4A,0x4B,0x48,0x40,0x40,0x00,  
// 重                     
0x00,0x00,0xFC,0x44,0x44,0x44,0x44,0xC5,0x7E,0xC4,0x44,0x44,0x44,0x44,0x44,0x00,
0x40,0x30,0x0F,0x40,0x20,0x10,0x0C,0x03,0x00,0x01,0x06,0x18,0x30,0x60,0x20,0x00, 
// 庆                         
0x20,0x20,0x20,0x20,0x20,0x20,0xA0,0x7F,0xA0,0x20,0x20,0x20,0x20,0x20,0x20,0x00,
0x00,0x80,0x40,0x20,0x10,0x0C,0x03,0x00,0x01,0x06,0x08,0x30,0x60,0xC0,0x40,0x00, 
// 大                              
0x40,0x30,0x10,0x12,0x5C,0x54,0x50,0x51,0x5E,0xD4,0x50,0x18,0x57,0x32,0x10,0x00,
0x00,0x02,0x02,0x02,0x02,0x02,0x42,0x82,0x7F,0x02,0x02,0x02,0x02,0x02,0x02,0x00, 
// 学                      
};     

void ReadLcdState (Uint16 E) //读状态字，判断忙否，E为区分左右
{
	unsigned long int i = 0;
	Uint32	STAFLAG;
	EALLOW;  
	GpioCtrlRegs.GPADIR.all =GpioCtrlRegs.GPADIR.all&0xfff00fff;//D0~D7输入
    EDIS;
	if(E==1)
		GpioDataRegs.GPBDAT.all = 0xfffa; //CSA=0,CSB=1左
	else	
		GpioDataRegs.GPBDAT.all = 0xfffb; //CSA=1,CSB=0右

	LCD_DI = 0;
	for(i=0; i<2; i++){}
	LCD_RW = 1;
	for(i=0; i<2; i++){}
	
	while(1)
	{		
		LCD_E = 1;
		for(i=0; i<2; i++){}
//		LCD_E = 0;

		STAFLAG = GpioDataRegs.GPADAT.all&0x80000;// 读液晶状态
		if(STAFLAG==0x0000)break;
	}
}

void WriteLcdIns (Uint32 INS,Uint16 E) //写指令，E为区分左右
{
	unsigned long int i = 0;
	ReadLcdState (E);
	EALLOW;  
	GpioCtrlRegs.GPADIR.all =GpioCtrlRegs.GPADIR.all|0x000ff000;//D0~D7输出
    EDIS;
	if(E==1)
		GpioDataRegs.GPBDAT.all = 0xfffa; //CSA=0,CSB=1左
	else	
		GpioDataRegs.GPBDAT.all = 0xfffb; //CSA=1,CSB=0右
	LCD_RW = 0;
	for(i=0; i<2; i++){}
	LCD_DI = 0;
	for(i=0; i<2; i++){}
    LCD_E = 1;
    GpioDataRegs.GPADAT.all=(GpioDataRegs.GPADAT.all&0xfff00fff)|(INS<<12);       // 指令写入LCD
	for(i=0; i<2; i++){}	
	LCD_E = 0;
}

void WriteLcdData (Uint32 DATA,Uint16 Yaddress,Uint16 E)   //写数据，E为区分左右
{
	unsigned long int i = 0;
	WriteLcdIns(Yaddress,E);		//设置列地址
	ReadLcdState (E);			//查询液晶是否为空闲
	EALLOW;  
	GpioCtrlRegs.GPADIR.all =GpioCtrlRegs.GPADIR.all|0x000ff000;//D0~D7输出
    EDIS;
    if(E==1)
		GpioDataRegs.GPBDAT.all = 0xfffa;   //CSA=0,CSB=1左
	else	
		GpioDataRegs.GPBDAT.all = 0xfffb;   //CSA=1,CSB=0右	
	LCD_RW = 0;
	for(i=0; i<2; i++){}
	LCD_DI = 1;
	for(i=0; i<2; i++){}
	LCD_E = 1;
	GpioDataRegs.GPADAT.all=(GpioDataRegs.GPADAT.all&0xfff00fff)|(DATA<<12);    // 数据写入LCD
	for(i=0; i<2; i++){}
	LCD_E = 0;	
}

void OffLcdDis (Uint16 E) //关显示
{
	unsigned long int i = 0;
	Uint32 STAFLAG;
	while(1)
	{
	    WriteLcdIns (0X3E,E);	   //写指令：关闭显示
      	ReadLcdState (E);		   //查询液晶是否为空闲
	EALLOW;  
	GpioCtrlRegs.GPADIR.all =GpioCtrlRegs.GPADIR.all&0xfff00fff;//D0~D7输入
    EDIS;
      	if(E==1)
			GpioDataRegs.GPBDAT.all = 0xfffa; //CSA=0,CSB=1左
		else	
			GpioDataRegs.GPBDAT.all = 0xfffb; //CSA=1,CSB=0右
		LCD_RW = 1;
		for(i=0; i<2; i++){}
		LCD_DI = 0;
		for(i=0; i<2; i++){}
    	LCD_E = 1;
		for(i=0; i<2; i++){}
		LCD_E = 0;

		STAFLAG = GpioDataRegs.GPADAT.all&0X20000;   // 读液晶状态
		if(STAFLAG==0X20000)break;          //如液晶关闭,则退出循环
	}
}

void OpenLcdDis (Uint16 E)      //开显示
{
	unsigned long int i = 0;
	Uint32	STAFLAG;
	while(1)
	{
		WriteLcdIns (0x3F,E);	   //写指令：LCD显示RAM中的内容
      	ReadLcdState (E);		   //查询液晶是否为空闲
	EALLOW;  
	GpioCtrlRegs.GPADIR.all =GpioCtrlRegs.GPADIR.all&0xfff00fff;//D0~D7输入
    EDIS;
    		if(E==1)
			GpioDataRegs.GPBDAT.all = 0xfffa;   //CSA=0,CSB=1左
		else	
			GpioDataRegs.GPBDAT.all = 0xfffb;   //CSA=1,CSB=0右	
		LCD_RW = 1;
		for(i=0; i<2; i++){}
		LCD_DI = 0;
		for(i=0; i<2; i++){}
		LCD_E = 1;
		for(i=0; i<2; i++){}
		LCD_E = 0;

		STAFLAG = GpioDataRegs.GPADAT.all&0X20000;    // 读液晶状态	
		if(STAFLAG==0x00000)break;        //如果液晶被打开,则退出循环
	}
}

void ClrLcdDis (Uint16 E) //清屏
{
	Uint16 PAGENUM;          //页地址B8～BF
	Uint16 Yaddress;         // Y地址40～7F
	for (PAGENUM=0xB8; PAGENUM<=0xBF; PAGENUM++)
    	{
        WriteLcdIns (PAGENUM, E); 		 //设置相应的页地址
        	for (Yaddress=0x40; Yaddress<=0x7F; Yaddress++)
         {
           	WriteLcdData(0x00, Yaddress, E);  //送0清屏
          }
     }
}

void LCDinit (Uint16 E) // LCD初始化子程序
{
	OffLcdDis (E);			  //关显示
	WriteLcdIns (0x0A4,E);    //设置显示驱动，占空比，复位，ADC选择等
   	WriteLcdIns (0x0A9,E);   
  	WriteLcdIns (0x0E2,E);   
 	WriteLcdIns (0x0A0,E);   
    ClrLcdDis (E);			  //清屏
	WriteLcdIns (0x3F,E);	   //写指令：LCD显示RAM中的内容
    OpenLcdDis (E);		       //开显示
}

void DISPLAY(Uint16 n,Uint16 E,Uint16 PAGADD,Uint16 Yaddress)    // 送显汉字子程序
{ 
	Uint16 K;
    char TEMP;
	WriteLcdIns (0X0c0,E);
   	WriteLcdIns (PAGADD,E);
    n=n*32;
    for(K=0;K<16;K++,Yaddress++) 
	{
	    TEMP=table1[K+n];
	     WriteLcdData (TEMP,Yaddress,E);
	}
	Yaddress=Yaddress-16;
	PAGADD=PAGADD+1;
	WriteLcdIns (PAGADD,E);
	for(;K<32;K++,Yaddress++)
	{
	    TEMP=table1[K+n];
	    WriteLcdData (TEMP,Yaddress,E);
	}
	WriteLcdIns (0X0C0,E);
	PAGADD=PAGADD-1;
    	WriteLcdIns (PAGADD,E);
}

void IOinit()                                               // I/O初始化子程序
{
 	EALLOW;
	GpioCtrlRegs.GPAMUX1.all = GpioCtrlRegs.GPAMUX1.all&0x00000000;
	GpioCtrlRegs.GPAMUX2.all = GpioCtrlRegs.GPAMUX2.all&0x00000000;
	GpioCtrlRegs.GPADIR.all = GpioCtrlRegs.GPADIR.all|0xfff00fff;
    GpioCtrlRegs.GPBMUX1.all = GpioCtrlRegs.GPBMUX1.all&0x00000000;
	GpioCtrlRegs.GPBDIR.all = GpioCtrlRegs.GPBDIR.all|0x0ff;
	EDIS;			
}

main() 
{
    InitSysCtrl();        // 系统初始化程序，该子程序在DSP28_sysctrl.c中
 	DINT;            // 关闭总中断
	IER = 0x0000;     // 关闭外围中断
	IFR = 0x0000;     // 请中断标志	
	IOinit();	        // I/O初始化子程序
	LCDinit(1);       // LCD初始化子程序
	LCDinit(2);
	DISPLAY (0,1,0xBA,0x47); //重
    DISPLAY (1,1,0xBA,0x67); //庆
    DISPLAY (2,2,0xBA,0x47); //大
    DISPLAY (3,2,0xBA,0x67); //学
    for( ; ; ){}
}