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LCD12864.c
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LCD12864.c
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#include"msp430x54x.h"
#include"LCD12864.h"
#include"UCS.h"
//#include"delay.h"
//用户可用函数：LCD12864_DrawPoint();LCD12864_drawLine();DisplayCgrom();
//需要放在开总中断之后
void LCD12864_init() //初始化函数：初始化引脚，初始化设备
{
P9DIR |= BIT0+BIT1+BIT2+BIT3+BIT4;
P10SEL = 0x00;
DataOut;
PSB_SET;
delay_ms(5);
DataOut;
OutData = 0;
RST_SET;
//以上引脚初始化
LCD12864_WriteCmd(FUN_MODE); //显示模式设置
delay_ms(5);
LCD12864_WriteCmd(FUN_MODE); //显示模式设置
delay_ms(5);
LCD12864_WriteCmd(DISPLAY_ON); //显示开
delay_ms(5);
LCD12864_WriteCmd(CLEAR_SCREEN); //清屏
delay_ms(5);
}
void LCD12864_CheckBusy() //检测是否忙，是则等待
{
unsigned char read;
DataIn;
do{
RS_CLR;
RW_SET;
EN_SET;
_NOP();
read=InData;
EN_CLR;
}while((read&0x80)!=0);
}
void LCD12864_WriteCmd(char cmd) //写命令
{
LCD12864_CheckBusy();
RS_CLR;
RW_CLR;
EN_SET;
DataOut;
OutData = cmd;
//delay_ms(5);
EN_CLR;
}
void LCD12864_WriteData(char dat) //写数据
{
LCD12864_CheckBusy();
RS_SET;
RW_CLR;
EN_SET;
DataOut;
OutData = dat;
//delay_ms(5);
EN_CLR;
}
char LCD12864_ReadData(void) //读数据
{
char dat;
LCD12864_CheckBusy();
RS_SET;
RW_SET;
EN_SET;
DataIn;
dat = InData;
EN_CLR;
return dat;
}
void LCD12864_DisplayStr(unsigned char x,unsigned char y,unsigned char *c) //向第x(0~3)行，y(0~7)列写字符串,每列可显示1汉字或2西文字符
{
LCD12864_WriteCmd(0x30);//关闭扩充指令集
switch(x)
{
case 0:DisplayCgrom(0x80+y,c);break;
case 1:DisplayCgrom(0x90+y,c);break;
case 2:DisplayCgrom(0x88+y,c);break;
case 3:DisplayCgrom(0x98+y,c);break;
default:break;
}
}
void LCD12864_ClearGRAM(void)
{
char i,j;
LCD12864_WriteCmd(0x34); //打开扩充指令集
for (i=0;i<32;i++)
{
LCD12864_WriteCmd(0x80+i);//先写Y地址(行数)
LCD12864_WriteCmd(0x80); //再写X地址(列数)
for (j=0;j<32;j++)
LCD12864_WriteData(0x00);
}
LCD12864_WriteCmd(0x30);//关闭扩充指令集
}
void LCD12864_ClearScreen(void)
{
LCD12864_WriteCmd(CLEAR_SCREEN);
delay_ms(5);
}
void DisplayCgrom(unsigned char addr,unsigned char *hz) //向起始地址addr写汉字字符串的指针hz
{
LCD12864_WriteCmd(addr);
delay_ms(5);
while(*hz != '\0')
{
LCD12864_WriteData(*hz);
hz++;
delay_ms(5);
}
}
void LCD12864_DisplayChar(unsigned char addr,unsigned char hz) //向地址addr写汉字字符hz
{
LCD12864_WriteCmd(addr);
delay_ms(5);
LCD12864_WriteData(hz);
delay_ms(5);
}
void LCD12864_DisplayNum(unsigned char addr,int num)
{
unsigned char str[7]={0};
int i,t=0;
if(num<0) t=1,num=-num;
for(i=5;num>0;i--)
{
str[i]=num%10+'0';
num/=10;
}
if(t) str[i]='-',DisplayCgrom(addr,str+i);
else DisplayCgrom(addr,str+i+1);
}
void LCD12864_DrawPoint(unsigned char x,unsigned char y,unsigned char type)//画点到显存,x(0~127),y(0~63)、0为白色，1 为黑色，2为取反
{
unsigned char X,Y,k; //X存储行地址，Y存储列地址、k存储点在字中的位置从左至右为0~15
unsigned char DH,DL; //存放读出数据的高字节和低字节
if(y<64 && x<128)
{
if(y < 32) //确定所画点的地址行与列地址
{
X = 0x80 + (x >> 4);
Y = 0x80 + y;
}
else
{
X = 0x88 + (x >> 4);
Y = 0x80 + (y - 32);
}
LCD12864_WriteCmd(0x36); //开启扩展指令，关闭绘图显示
LCD12864_WriteCmd(Y); //写入所确定的点的行位地址
LCD12864_WriteCmd(X); //写入所确定的点的列字地址
DH = LCD12864_ReadData(); //假读
DH = LCD12864_ReadData(); //读高字节
DL = LCD12864_ReadData(); //读低字节
k = x % 16; //余数为点在字中的位置
//画点
switch(type){ //画点类型，1黑或0白或2取反
case 0:
if(k<8)DH &= ~(0x01 << (7 - k)); //点在高字节
else DL &= ~(0x01 << (7 - (k % 8))); //点在低字节
break;
case 1:
if(k < 8)DH |= (0x01 << (7 - k)); //修改该点同时保持其他位不变
else DL |= (0x01 << (7 - (k % 8))); //修改该点同时保持其他位不变
break;
case 2:
if(k < 8)DH ^= (0x01 << (7 - k)); //修改该点同时保持其他位不变
else DL ^= (0x01 << (7 - (k % 8))); //修改该点同时保持其他位不变
break;
default:
break;
}
LCD12864_WriteCmd(Y); //写行位地址
LCD12864_WriteCmd(X); //写列字地址
LCD12864_WriteData(DH); //将高字节数据写回
LCD12864_WriteData(DL); //将低字节数据写回
LCD12864_WriteCmd(0x30); //转回普通指令
}
}
void LCD12864_DrawLine(unsigned char x1,unsigned char y1,unsigned char x2,unsigned char y2,unsigned char type)
{
signed int temp;
signed int dx,dy; //定义起点到终点的横、纵坐标增加值
signed char s1,s2,status,i;
signed int Dx,Dy,sub;
dx=x2-x1;
if(dx>=0)s1=1; //X的方向是增加的
else s1=-1; //X的方向是降低的
dy=y2-y1; //判断Y的方向是增加还是降到的
if(dy>=0)s2=1;
else s2=-1;
Dx=(x2-x1)*s1; //计算横、纵标志增加值的绝对值
Dy=(y2-y1)*s2;
if(Dy>Dx)
{ //以45度角为分界线，靠进Y轴是status=1,靠近X轴是status=0
temp=Dx;
Dx=Dy;
Dy=temp;
status=1;
}
else status=0;
if(dx==0) //横向上没有增量，画一条垂直线
{
for(i=y1;i!=y2;i+=s2) LCD12864_DrawPoint(x1, i, type);
return;
}
if(dy==0) //纵向上没有增量，画一条水平线
{
for(i=x1;i!=x2;i+=s1)
LCD12864_DrawPoint(i, y1, type);
return;
}
sub=(Dy<<1)-Dx; //第1次判断下个点的位置
for(i=0;i<Dx;i++)
{
LCD12864_DrawPoint(x1, y1, type); //画点
if(sub>=0)
{
if(status==1)x1+=s1; //在靠近Y轴区，x值加1
else y1+=s2; //在靠近X轴区，y值加1
sub-=Dx<<1; //判断下下个点的位置
}
if(status==1)y1+=s2;
else x1+=s1;
sub+=Dy<<1;
}
LCD12864_DrawPoint(x2,y2,type);
}
void LCD12864_DrawRectangle(unsigned char x1,unsigned char y1,unsigned char x2,unsigned char y2,unsigned char type)
{
LCD12864_DrawLine(x1,y1,x2,y1,type);
LCD12864_DrawLine(x1,y1,x1,y2,type);
LCD12864_DrawLine(x2,y1,x2,y2,type);
LCD12864_DrawLine(x1,y2,x2,y2,type);
}
void LCD12864_DrawCircle(unsigned char x0,unsigned char y0,unsigned char r, unsigned char type)
{
int x=0,y=r,f=0;
while(x<=y)
{
LCD12864_DrawPoint(x0+x,y0+y,type);
LCD12864_DrawPoint(x0+x,y0-y,type);
LCD12864_DrawPoint(x0-x,y0+y,type);
LCD12864_DrawPoint(x0-x,y0-y,type);
LCD12864_DrawPoint(x0+y,y0+x,type);
LCD12864_DrawPoint(x0+y,y0-x,type);
LCD12864_DrawPoint(x0-y,y0+x,type);
LCD12864_DrawPoint(x0-y,y0-x,type);
if(f<=0)
{
f=f+2*x+1;
x++;
}
else
{
f=f-2*y+1;
y--;
}
}
}