液晶12864 反白 1,3两行

只看该作者 · 2010-4-7 17:40

能给个比较容易理解的说明吗？

1万 · 2010-4-8 09:40

这个时由驱动芯片决定的，ST7920，反正时反白时1、3一组，2、4一组，其实你仔细看datasheet就会发现，汉字显示时，1和3行的地址是连续的，2和4的地址是连续的，不过可以通过一定手段实现单独反白

只看该作者 · 2010-4-8 12:45

哦谢谢
:$

只看该作者 · 2010-4-8 14:58

2楼说的很好！

只看该作者 · 2010-4-9 22:18

我们一直在学习

只看该作者 · 2010-12-5 18:07

是可以实现单行甚至是随便某处的反白，要向7920的绘图区写 1 。

只看该作者 · 2012-4-18 17:04

:(给个实例啊！

只看该作者 · 2012-4-27 15:48

帖个实例给大家看看。单字或者多字反白
#include <reg52.h>

#define uint  unsigned int
#define uchar unsigned char
#define x1 0x80
#define x2 0x88
#define y    0x80
#define comm  0
#define dat 1

sbit rs = P3^0; //H=data; L=command;
sbit rw = P3^1; //H=read; L=write;
sbit  e = P3^2; //input enable;
sbit psb= P3^3; //H=并口; L=串口;
sbit rst= P3^4; //Reset Signal 低电平有效

sbit busy=P1^7; //lcd busy bit

void wr_lcd (uchar dat_comm,uchar content);
void chk_busy (void);
void delay (uint us);
void delay1 (uint ms);
uchar code tab1[]={
"锐显科技有限公司"
"ES:www.rxlcd.com"
"中文图形液晶模块"
"TEL:020-62619437"
};

unsigned char code tab5[]=
{
/*------------------------------------------------------------------------------
;  宽×高（像素）: 128×64
;  字模格式/大小 : 单色点阵液晶字模，横向取模，字节正序/1024字节
------------------------------------------------------------------------------*/
0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,
0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,
0x80,0x00,0x60,0x00,0x00,0x00,0x00,0x0F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x01,
0x00,0x00,0xF0,0x00,0x00,0x3F,0x8F,0xFF,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x01,0xF8,0x00,0x00,0x3F,0x8F,0xFF,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xFC,0x00,0x00,0x3F,0x8F,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x07,0xFE,0x00,0x00,0x3F,0xCF,0xEF,0xC0,0xFF,0xC7,0xE3,0xE7,0xF0,0x00,0x00,
0x00,0x0F,0xBF,0x03,0x00,0x1F,0xDF,0xCF,0xC3,0xFF,0xF7,0xF7,0xF3,0xF0,0x00,0x00,
0x00,0x1F,0x1F,0x87,0x80,0x1F,0xDF,0xCF,0xC7,0xFF,0xFF,0xF3,0xF3,0xF0,0x00,0x00,
0x00,0x3E,0x0F,0xCF,0xC0,0x1F,0xDF,0xCF,0xC7,0xE3,0xFB,0xFF,0xF7,0xE0,0x00,0x00,
0x00,0x7C,0x07,0xFF,0xE0,0x0F,0xDF,0x8F,0xC7,0xFF,0xFB,0xFF,0xFF,0xE0,0x00,0x00,
0x00,0xF8,0x03,0xFE,0xF0,0x0F,0xFF,0x8F,0xC7,0xFF,0xFB,0xFF,0xFF,0xE0,0x00,0x00,
0x01,0xF0,0x01,0xFC,0x78,0x07,0xFF,0x0F,0xC7,0xE0,0x01,0xFF,0xFF,0xC0,0x00,0x00,
0x03,0xE0,0x00,0xF8,0x3C,0x07,0xFF,0x0F,0xC7,0xEF,0xF9,0xFF,0xFF,0xC0,0x00,0x00,
0x07,0xC0,0x01,0xF0,0x1E,0x03,0xFE,0x0F,0xC7,0xFF,0xF9,0xFF,0x7F,0xC0,0x00,0x00,
0x0F,0x80,0x03,0xE0,0x0F,0x01,0xFE,0x0F,0xC3,0xFF,0xF0,0xFF,0x7F,0x80,0x00,0x00,
0x1F,0x00,0x07,0xC0,0x07,0x81,0xFC,0x0F,0xC0,0xFF,0xC0,0xFE,0x7F,0x80,0x00,0x00,
0x3F,0x00,0x0F,0x80,0x03,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x1F,0x80,0x0F,0x80,0x03,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x0F,0xC0,0x07,0xC0,0x07,0x87,0xFF,0x83,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x07,0xE0,0x03,0xE0,0x0F,0x0F,0xFF,0xC3,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x03,0xF0,0x01,0xF0,0x1E,0x3F,0xFF,0xE3,0xF0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x01,0xF8,0x03,0xF8,0x3C,0x3F,0x87,0xE3,0xFF,0xE1,0xFF,0xF0,0x7F,0xF1,0xFF,0xF8,
0x00,0xFC,0x07,0xFC,0x78,0x3F,0xF8,0x03,0xFF,0xF3,0xFF,0xFC,0x7F,0xF1,0xFF,0xFC,
0x00,0x7E,0x0F,0xFE,0xF0,0x3F,0xFF,0xC3,0xFF,0xF3,0xFF,0xFC,0x7F,0xF9,0xFF,0xFE,
0x00,0x3F,0x1F,0x9F,0xE0,0x3F,0xFF,0xE3,0xFF,0xF0,0x03,0xFC,0x7E,0xF9,0xFF,0xFE,
0x00,0x1F,0xBF,0x0F,0xC0,0x0F,0xFF,0xF3,0xF3,0xF1,0xFF,0xFC,0x7E,0xF9,0xFC,0xFE,
0x00,0x0F,0xFE,0x07,0x80,0x07,0xFF,0xF3,0xF3,0xF3,0xFF,0xFC,0x7E,0x01,0xF8,0x7E,
0x00,0x07,0xFC,0x03,0x00,0x00,0x0F,0xF3,0xF3,0xF3,0xF9,0xFC,0x7E,0x01,0xFC,0xFE,
0x00,0x03,0xF8,0x00,0x00,0x3F,0xC7,0xF3,0xF3,0xF3,0xF9,0xFC,0x7E,0x01,0xFF,0xFE,
0x00,0x01,0xF0,0x00,0x00,0x3F,0xFF,0xF3,0xF3,0xF3,0xFF,0xFC,0x7E,0x01,0xFF,0xFE,
0x00,0x00,0xE0,0x00,0x00,0x3F,0xFF,0xE3,0xF3,0xF3,0xFF,0xFC,0x7E,0x01,0xFF,0xFC,
0x00,0x00,0x40,0x00,0x00,0x07,0xFF,0x83,0xF3,0xF1,0xFF,0x7C,0x7E,0x01,0xFF,0xF8,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xF8,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xF8,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0xF8,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x1C,0x00,0x1C,0x0F,0x00,0x00,
0x00,0x08,0x00,0x00,0x00,0x00,0x0C,0x00,0x00,0x38,0x1C,0x00,0x1E,0x0F,0x00,0x00,
0x00,0x0E,0x00,0x38,0x00,0x07,0xFF,0x00,0x00,0x7C,0x0C,0x00,0x1E,0x07,0x00,0x00,
0x00,0x0F,0x00,0x38,0x00,0xFF,0xFF,0x80,0x01,0xFC,0x0C,0x00,0x0E,0x07,0x00,0x00,
0x00,0x0E,0x3C,0x78,0x00,0x70,0x0F,0x00,0x03,0xF0,0x1C,0x00,0x0E,0x07,0x00,0x00,
0x00,0x1E,0x1E,0xF0,0x00,0x73,0xFF,0x00,0x07,0xE3,0xFC,0x00,0x0E,0x07,0xE0,0x00,
0x00,0x1F,0xFF,0xC0,0x00,0x7F,0xFE,0x00,0x00,0xE0,0xEC,0x00,0x0C,0x0F,0xF0,0x00,
0x00,0x3F,0xCF,0xE0,0x00,0x1C,0x0E,0x00,0x00,0xEC,0x0C,0x00,0x1F,0xFF,0x80,0x00,
0x00,0x3C,0x07,0xF8,0x00,0x18,0x1E,0x00,0x00,0xFE,0x0C,0x00,0xFF,0x3E,0x00,0x00,
0x00,0x63,0xFF,0xF8,0x00,0x3F,0xFC,0x00,0x1F,0xFF,0xEC,0x01,0xFC,0x0E,0x00,0x00,
0x00,0xFF,0xF8,0x70,0x00,0x1F,0xFC,0x00,0x3F,0xC0,0xEC,0x00,0x0C,0x07,0xC0,0x00,
0x00,0xFE,0x18,0xF0,0x00,0x00,0x33,0x00,0x3F,0xFC,0x0F,0xE0,0x0F,0x1F,0xE0,0x00,
0x01,0xCE,0x1F,0xE0,0x00,0x0E,0x73,0xC0,0x03,0xFC,0x3F,0xF0,0x0E,0xFF,0xC0,0x00,
0x01,0x8F,0xDE,0xC0,0x00,0x07,0x73,0xC0,0x07,0xE7,0xFC,0x40,0x3C,0x63,0xC0,0x00,
0x00,0x7F,0x8E,0xC0,0x01,0xC7,0x77,0x80,0x07,0xEF,0xFC,0x00,0xFC,0x73,0x80,0x00,
0x00,0xFE,0x0E,0xC0,0x00,0xFF,0x7F,0x00,0x0E,0xE0,0x1C,0x07,0xFC,0x3F,0x80,0x00,
0x00,0x0E,0x1E,0xC1,0x80,0xFE,0x7E,0x00,0x1C,0xE0,0x1C,0x07,0x9C,0x1F,0x00,0x00,
0x00,0x0C,0x98,0x83,0x80,0x7E,0x70,0x00,0x78,0xC0,0x1C,0x03,0x9C,0x0E,0x00,0x00,
0x00,0x0F,0xB8,0x83,0x80,0x3E,0x60,0x00,0x60,0xC0,0x1C,0x00,0x1C,0x0F,0xC0,0x00,
0x00,0x0F,0x70,0xC3,0x80,0x0E,0x7F,0xF0,0x00,0xC0,0x1C,0x00,0x1C,0x7D,0xF0,0x00,
0x00,0x3E,0xE0,0xFF,0xC1,0xFF,0xFF,0xF8,0x00,0xE0,0x0C,0x00,0x3D,0xF0,0x7E,0x00,
0x00,0x3D,0xC0,0x7F,0x8F,0xFF,0x80,0x00,0x00,0xE0,0x0C,0x00,0x7F,0xC0,0x7F,0x80,
0x00,0x18,0x00,0x3C,0x07,0x80,0x00,0x00,0x00,0x80,0x08,0x00,0x3C,0x00,0x3F,0x00,
0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x00,0x18,0x00,0x00,0x01,
0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,
0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x07,
};

/*------------------初始化-----------------*/
void init_lcd (void)
{
  rst=0;
delay1 (900);
  rst=1;
  psb=1;
  wr_lcd (comm,0x30);  /*30---基本指令动作*/
  wr_lcd (comm,0x01);  /*清屏，地址指针指向00H*/
  wr_lcd (comm,0x06);  /*光标的移动方向*/
  wr_lcd (comm,0x08);  /*开显示，关游标*/
}
/*---------------显示汉字或字符----------------*/
void chn_disp (uchar code *chn)
{
  uchar i,j;
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x80);
  for (j=0;j<4;j++)
  {
for (i=0;i<16;i++)
wr_lcd (dat,chn[j*16+i]);
  }
}
/*-----------上半屏显示汉字或字符------------*/
void chn_disp1 (uchar code *chn)
{
  uchar i,j;
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x80);
  j=0;
  for (i=0;i<16;i++)
  wr_lcd (dat,chn[j*16+i]);
  wr_lcd (comm,0x90);
  j=1;
  for (i=0;i<16;i++)
  wr_lcd (dat,chn[j*16+i]);
}
/*----------------显示图形-----------------*/
void img_disp (uchar code *img)
{
  uchar i,j;
  for(j=0;j<32;j++)
  {
for(i=0;i<8;i++)
{
   wr_lcd (comm,0x34);
   wr_lcd (comm,y+j);
   wr_lcd (comm,x1+i);
   wr_lcd (comm,0x30);
   wr_lcd (dat,img[j*16+i*2]);
   wr_lcd (dat,img[j*16+i*2+1]);
}
  }
  for(j=32;j<64;j++)
  {
for(i=0;i<8;i++)
{
   wr_lcd (comm,0x34);
   wr_lcd (comm,y+j-32);
   wr_lcd (comm,x2+i);
   wr_lcd (comm,0x30);
   wr_lcd (dat,img[j*16+i*2]);
   wr_lcd (dat,img[j*16+i*2+1]);
}
  }
  wr_lcd (comm,0x36);
}
/*-------------下半屏显示图形--------------*/
void img_disp1 (uchar code *img)
{
  uchar i,j;
  for(j=0;j<32;j++)
  {
for(i=0;i<8;i++)
{
   wr_lcd (comm,0x34);
   wr_lcd (comm,y+j);
   wr_lcd (comm,x2+i);
   wr_lcd (comm,0x30);
   wr_lcd (dat,img[j*16+i*2]);
   wr_lcd (dat,img[j*16+i*2+1]);
}
  }
  wr_lcd (comm,0x36);
}
/*--------------显示点阵----------------*/
void lat_disp (uchar data1,uchar data2)
{
  uchar i,j,k,x;
  x=x1;
  for(k=0;k<2;k++)
  {
for(j=0;j<16;j++)
{
   for(i=0;i<8;i++)
   {
      wr_lcd (comm,0x34);
      wr_lcd (comm,y+j*2);
      wr_lcd (comm,x+i);
      wr_lcd (comm,0x30);
      wr_lcd (dat,data1);
      wr_lcd (dat,data1);
   }
   for(i=0;i<8;i++)
   {
      wr_lcd (comm,0x34);
      wr_lcd (comm,y+j*2+1);
      wr_lcd (comm,x+i);
      wr_lcd (comm,0x30);
      wr_lcd (dat,data2);
      wr_lcd (dat,data2);
   }
}
x=x2;
  }
  wr_lcd (comm,0x36);
}
/*-----------------------------------------------*/
//当data1=0xff,data2=0xff时,在x0,y0处反白显示16xl*yl.
void con_disp (uchar data1,uchar data2,uchar x0,uchar y0,uchar xl,uchar yl)
{
  uchar i,j;
  for(j=0;j<yl;j++)
  {
for(i=0;i<xl;i++)
{
   wr_lcd (comm,0x34);
   wr_lcd (comm,y0+j);
   wr_lcd (comm,x0+i);
   wr_lcd (comm,0x30);
   wr_lcd (dat,data1);
   wr_lcd (dat,data2);
}
  }
  wr_lcd (comm,0x36);
}
/*--------------清DDRAM------------------*/
void clrram (void)
{
  wr_lcd (comm,0x30);
  wr_lcd (comm,0x01);
}
/*---------------------------------------*/
void wr_lcd (uchar dat_comm,uchar content)
{
  chk_busy ();
  if(dat_comm)
{
rs=1; //data
rw=0; //write
}
  else
{
rs=0; //command
rw=0; //write
}
  P1=content; //output data or comm
  e=1;
  ;
  e=0;
}

void chk_busy (void)
{
  P1=0xff;
  rs=0;
  rw=1;
  e =1;
  while(busy==1);
  e =0;
}

void delay (uint us) //delay time
{
  while(us--);
}
void delay1 (uint ms)
{
  uint i,j;
  for(i=0;i<ms;i++)
  for(j=0;j<15;j++)
  delay(1);
}
/*------------------主程序--------------------*/
void main ()
{
  SP=0x5f;
  init_lcd ();
  while (1)
  {
lat_disp (0x00,0x00);
chn_disp (tab1);
   wr_lcd (comm,0x0f);  //开光标
con_disp (0xff,0xff,0x82,0x90,2,16);//文字反白
   wr_lcd (comm,0x8f);  //光标位置
delay1 (5000);
wr_lcd (comm,0x30);  //基本指令
   wr_lcd (comm,0x08);  //关光标
clrram();          //文字清屏
lat_disp (0xcc,0xcc);
delay1 (5000);
lat_disp (0x00,0x00);//图形清屏
lat_disp (0xff,0x00);
delay1 (5000);
img_disp (tab5);
delay1 (5000);
  }
}

液晶12864 反白 1,3两行

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