新建 文本文档 (4).txt

很實用的12864LCD驅動函數 KEilC51開發

12864液晶显示驱功程序
#include <reg51.h>   //头函数
sbit P1_4 = P1^4;
sbit P1_3 = P1^3;
sbit P1_5 = P1^5;
#define LCM_RW P1_4   //定义引脚
#define LCM_RS P1_3 
#define LCM_E   P1_5
#define LCM_Data P2   //数据线
#define Busy    0x80 //用于检测LCM状态字中的Busy标识
void WriteDataLCM(unsigned char WDLCM);
void WriteCommandLCM(unsigned char WCLCM,BuysC);
unsigned char ReadDataLCM(void);
unsigned char ReadStatusLCM(void);
void LCMInit(void);
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
void delay(unsigned int MS);
void Lcd12864_Location_XY(unsigned char x,unsigned char y);
void lcd_12864_clr(void); 
void Display(unsigned char dd );
void PHO_DISP(unsigned char code *s);
void lcd_12864_16x16(unsigned char x,unsigned char y,unsigned char code *w);
void main(void)
{
程序设计区


                
}

//写数据
void WriteDataLCM(unsigned char WDLCM)
{
ReadStatusLCM(); //检测忙
LCM_Data = WDLCM;
LCM_RS = 1;
LCM_RW = 0;
LCM_E = 0;      //若晶振速度太高可以在这后加小的延时
LCM_E = 0;      //延时
LCM_E = 1;
}

//写指令
void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测
{
if (BuysC) ReadStatusLCM();    //根据需要检测忙
LCM_Data = WCLCM;
LCM_RS = 0;
LCM_RW = 0; 
LCM_E = 0;
LCM_E = 0;
LCM_E = 1; 
}

//读数据
unsigned char ReadDataLCM(void)
{
LCM_RS = 1; 
LCM_RW = 1;
LCM_E = 0;
LCM_E = 0;
LCM_E = 1;
return(LCM_Data);
}

//读状态
unsigned char ReadStatusLCM(void)
{
LCM_Data = 0xFF; 
LCM_RS = 0;
LCM_RW = 1;
LCM_E = 0;
LCM_E = 0;
LCM_E = 1;
while (LCM_Data & Busy); //检测忙信号
return(LCM_Data);
}

void LCMInit(void) //LCM初始化
{
LCM_Data = 0;
WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号
delay(5); 
WriteCommandLCM(0x38,0);
delay(5); 
WriteCommandLCM(0x38,0);
delay(5); 
WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号
WriteCommandLCM(0x08,1); //关闭显示
WriteCommandLCM(0x01,1); //显示清屏
WriteCommandLCM(0x06,1); // 显示光标移动设置
WriteCommandLCM(0x0F,1); // 显示开及光标设置
lcd_12864_clr();
}

//按指定位置显示一个字符
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData) 
                                   //x表示列、y 表示行
{
Y &= 0x03;
X &= 0x07;
switch(Y)
{
case 0:
   Y=0x80;break;
case 1:
   Y=0x90;break;
case 2:
   Y=0x88;break;
case 3:
   Y=0x98;break;
default:break;
}
WriteCommandLCM(Y+X,1);
WriteDataLCM(DData);
}

//按指定位置显示一串字符
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
{
unsigned char ListLength;
ListLength = 0;
Y &= 0x03;
X &= 0x07;
switch(Y)
{
case 0:
   Y=0x80;break;
case 1:
   Y=0x90;break;
case 2:
   Y=0x88;break;
case 3:
   Y=0x98;break;
default:break;
} 
WriteCommandLCM(Y+X,1);                    //限制X不能大于15，Y不能大于1
while (DData[ListLength]!='\0') //若到达字串尾则退出,字符长度小于32
{
WriteDataLCM(DData[ListLength]);
ListLength++;
}
}

void delay(unsigned int MS)
{
        unsigned char us,usn;
        while(MS!=0)
        {
                usn = 2;        //for 12M
                while(usn!=0)
                {
                        us=0xf6;
                        while (us!=0){us--;};
                        usn--;
                }
                MS--;
        }
}
/*=======================================================
显示光标定位
=======================================================*/
void Lcd12864_Location_XY(unsigned char x,unsigned char y)
{ 
y &= 0x03;
x &= 0x07;
switch(y)
{
case 0:
   y=0x80;break;
case 1:
   y=0x90;break;
case 2:
   y=0x88;break;
case 3:
   y=0x98;break;
default:break;
}
WriteCommandLCM(y+x,1);
}

//**********显示图形子程序********************* 
void PHO_DISP(unsigned char code *s) 
{ unsigned char Page;     //页 地址
unsigned char Col;      //列 地址
unsigned char COUNT1,COUNT2,COUNT3;
COUNT3=0X02; 
Col=0X80; 
for (;COUNT3!=0;COUNT3--) 
{ 
Page=0X80; 
COUNT2=0X20;//32 
for (;COUNT2!=0;COUNT2--) 
{ 
COUNT1=0X10;//16 
WriteCommandLCM(0x34,1); 
WriteCommandLCM(Page,1); 
WriteCommandLCM(Col,1); 
WriteCommandLCM(0x30,1); 
for (;COUNT1!=0;COUNT1--) 
{ 
WriteDataLCM(*s++); 
} 
Page+=1; 
} 
Col=0X88; 
} 
WriteCommandLCM(0x36,1);
delay(20); 
WriteCommandLCM(0x30,1);
WriteCommandLCM(0x0C,1); 
}

void lcd_12864_clr(void) 
{ unsigned char Page;     //页 地址
unsigned char Col;      //列 地址
unsigned char COUNT1,COUNT2,COUNT3;
COUNT3=0X02; 
Col=0X80; 
for (;COUNT3!=0;COUNT3--) 
{ 
Page=0X80; 
COUNT2=0X20;//32 
for (;COUNT2!=0;COUNT2--) 
{ 
COUNT1=0X10;//16 
WriteCommandLCM(0x34,1); 
WriteCommandLCM(Page,1); 
WriteCommandLCM(Col,1); 
WriteCommandLCM(0x30,1); 
for (;COUNT1!=0;COUNT1--) 
{ 
WriteDataLCM(0x00); 
} 
Page+=1; 
} 
Col=0X88; 
} 
WriteCommandLCM(0x36,1); 
delay(20);
WriteCommandLCM(0x30,1); 
WriteCommandLCM(0x0C,1); 
}
void lcd_12864_16x16(unsigned char x,unsigned char y,unsigned char code *w)
{ unsigned char Page;     //页 地址
unsigned char Col;      //列 地址
    unsigned char shu,ju;
x&=0x07;
y&=0x03;
if(y==0){Page=0x80;Col=x|0x80;}
if(y==1){Page=0x90;Col=x|0x80;}
if(y==2){Page=0x80;Col=x|0x88;}
if(y==3){Page=0x90;Col=x|0x88;}
shu=0x10;
for(;shu!=0;shu--)
{ 
    WriteCommandLCM(0x34,1); 
WriteCommandLCM(Page,1); 
WriteCommandLCM(Col,1); 
WriteCommandLCM(0x30,1); 
ju=0x02;
     for(;ju!=0;ju--)
{
    WriteDataLCM(*w++); 
}

Page+=1;
}
WriteCommandLCM(0x36,1); 
    WriteCommandLCM(0x30,1);
   delay(20);
   WriteCommandLCM(0x0c,1); 
}