89C52单片机LCD液晶显示

ID:220488 · 发表于 2017-7-18 11:21

#include "lcd_show.h"

#define uint unsigned int
#define uchar unsigned char

#define CSA P2_1
#define CSB P2_0
#define E P2_3
#define RW P2_5
#define DI P2_6

sbit busy_bit=ACC^7; //lcd state byte bit 7

/*下面是对液晶屏gxm12864d操作的函数, 128x64点阵，汉字显示，CSA,CSB用来进行左右显示区的选择。*/

/*  发命令i到主窗口*/
void lcd_mwc(uchar i)
{
   CSA=1;
   CSB=0;
   RW=1;
   DI=0;
   do {ACC=LCD;}
   while (busy_bit) ;//wait for lcd not busy
   RW=0;
   LCD=i;
}

/*  写数据i到主窗口*/
void lcd_mwd(uchar i)
{
   CSA=1;
   CSB=0;
   RW=1;
   DI=0;
   do {ACC=LCD;} while (busy_bit);//wait for lcd not busy
   RW=0;
   DI=1;
   LCD=i;
}

/* 清屏 */
void lcd_clear(void)
{
   uchar i;
   uchar page;
   for (page=0xb8;page<0xc0;page++)
      {
         lcd_mwc(page);    /*设置显示页面*/

         lcd_mwc(0x40);    /*设置列地址*/

         for (i=0;i<64;i++)
         {

               lcd_mwd(0);
         }
      }
}

//初始化lcd
void lcd_init(void)
{
lcd_mwc(0xc0);

lcd_mwc(0x3f);

}

//dispm_hz_up() display up half of a hanzi in left area
void dispm_hz_up(uchar code * hz)
{
uchar i;
for (i=0;i<16;i++) lcd_mwd(*(hz+i));
}

//dispm_hz_down() display down half of a hanzi in left area
void dispm_hz_down(uchar code * hz)
{
uchar i;
for (i=16;i<32;i++) lcd_mwd(*(hz+i));
}

void main(void)
{
E=1;
lcd_clear();
lcd_init();

lcd_mwc(0xb8);
lcd_mwc(0x40);

dispm_hz_up(&QING);
dispm_hz_up(&CHA);
dispm_hz_up(&KA);

lcd_mwc(0xb9);
lcd_mwc(0x40);

dispm_hz_down(&QING);
dispm_hz_down(&CHA);
dispm_hz_down(&KA);//display

}

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