lcdceshi2.c

LM192 64D的点阵驱动程序

//              19264 Demo Program
//***************************************************************************
//连线表:  CPU=89C52                                                        *
//RS=P3.0     R/W=P3.1     E=P3.2     CS1=P3.3     CS2=P3.4     CS3=P3.5    *
//SysClock=12MHz           DB0-DB7=P0.0-P0.7       /Reset=InBoard           *
//***************************************************************************

#include <reg52.h>
#include <stdlib.h>
#include <intrins.h>
#include <stdio.h>

/********************引脚定义********************/

sbit RST = P2^4;

sbit    RS  =P2^7;      //数据指令
sbit    RW  =P2^6;      //读写
sbit    E   =P2^5;      //使能
sbit    CSL =P2^0;      //左片选
sbit    CSM =P2^1;      //中片选
sbit    CSR =P2^2;      //右片选

unsigned char Page;     //页 地址
unsigned char Col;      //列 地址

unsigned char code BMP0[];
unsigned char code BMP2[];

void Delay(unsigned int MS);
void wtcom(void);

/***************************/
/*检查Busy                 */
/***************************/
void BusyL(void)
{
        CSL= 0;
        CSM= 1;
        CSR= 1;
        wtcom();
}

void BusyM(void)
{
        CSL= 1;
        CSM= 0;
        CSR= 1;
        wtcom();
}

void BusyR(void)
{
        CSL= 1;
        CSM= 1;
        CSR= 0;
        wtcom();
}

void wtcom(void)
{
        RS = 0;         //指令
        RW = 1;
        P0 = 0xFF;      //输出0xff以便读取正确
        E  = 1;
        _nop_();
        while(P0 & 0x80);       //Status Read Bit7 = BUSY  ??????????
        E  = 0;
        _nop_();
}

/********************************************************/
/*根据设定的坐标数据，定位LCM上的下一个操作单元位置     */
/********************************************************/
void Locatexy(void)
{
        unsigned char x,y;
        switch (Col&0xc0)       /*  col.and.0xC0        */
        {                       /*条件分支执行          */
                case 0: {BusyL();break;}/*左区  */
                case 0x40:      {BusyM();break;}/*中区  */
                case 0x80:      {BusyR();break;}/*右区  */
        }
        x = Col&0x3F|0x40;      /* col.and.0x3f.or.Set Y Address*/
        y = Page&0x07|0xB8;     /* row.and.0x07.or.set Page     */
        wtcom();                /* waitting for enable  */
        RS = 0;                 //指令
        RW = 0;                 //写
        P0 = y;                 //设置页面地址
        E  = 1;
        _nop_();
        E  = 0;
        _nop_();
        wtcom();                /*  waitting for enable */
        RS = 0;
        RW = 0;
        P0 = x;                 //设置列地址
        E  = 1;
        _nop_();
        E  = 0;
        _nop_();
}

/***************************/
/*写指令                   */
/***************************/
void WriteCommandL( unsigned char CommandByte )
{
        BusyL();
        P0 = CommandByte;
        RS = 0;         //指令
        RW = 0;
        E  = 1;
        _nop_();
        E  = 0;
        _nop_();
}

void WriteCommandM( unsigned char CommandByte )
{
        BusyM();
        P0 = CommandByte;
        RS = 0;         //指令
        RW = 0;
        E  = 1;
        _nop_();
        E  = 0;
        _nop_();
}

void WriteCommandR( unsigned char CommandByte )
{
        BusyR();
        P0 = CommandByte;
        RS = 0;         //指令
        RW = 0;
        E  = 1;
        _nop_();
        E  = 0;
        _nop_();
}

/***************************/
/*读数据                   */
/***************************/
unsigned char ReadData( void )
{
        unsigned char DataByte;
        Locatexy();     /*坐标定位，返回时保留分区状态不变      */
        RS = 1;         /*数据输出*/
        RW = 1;         /*读入  */
        P0 = 0xFF;              //输出0xff以便读取正确
        E  = 1;         /*读入到LCM*/
        _nop_();
        DataByte = P0;  /*数据读出到数据口P0 */
        E  = 0;
        _nop_();
        return DataByte;
}

/***************************/
/*写数据                   */
/***************************/
void WriteData( unsigned char DataByte )
{
        Locatexy();     /*坐标定位，返回时保留分区状态不变      */
        RS = 1;         /*数据输出*/
        RW = 0;         /*写输出  */
        P0 = DataByte;  /*数据输出到数据口 */
        E  = 1;         /*写入到LCM*/
        _nop_();
        E  = 0;
        _nop_();
}

void LcmClear( void )
{
        Page = 0;
        Col  = 0;
        for(Page=0;Page<8;Page++)
                for(Col=0;Col<192;Col++)
                        WriteData(0);
}

void LcmInit( void )
{
        RST = 0; //补充
	    //Delay（10);
	    RST = 1;


		WriteCommandL(0x3f);    //开显示
        WriteCommandM(0x3f);
        WriteCommandR(0x3f);
        
        WriteCommandL(0xc0);    //设置起始地址=0
        WriteCommandM(0xc0);
        WriteCommandR(0xc0);

        WriteCommandL(0x3f);    //开显示
        WriteCommandM(0x3f);
        WriteCommandR(0x3f);

        LcmClear();
        Col = 0;
        Page= 0;
        Locatexy();
}

void LcmPutDots( unsigned char DotByte )
{
        Page = 0;
        Col  = 0;
        for(Page=0;Page<8;Page++)
        {
                for(Col=0;Col<192;Col++)
                {
                        WriteData( DotByte );
                        DotByte = ~DotByte;
                }
        }
}

void LcmPutBMP( unsigned char *puts )
{
        unsigned int X=0;
        Page = 0;
        Col  = 0;
        for(Page=0;Page<8;Page++)
        {
                for(Col=0;Col<192;Col++)
                {
                        WriteData( puts[X] );
                        X++;
                }
        }
}

void LcmReverseBMP( void )
{
        unsigned char temp;
        Page = 0;
        Col  = 0;
        for(Page=0;Page<8;Page++)
        {