Lcd1602液晶显示程序

ID:973406 · 发表于 2021-10-28 18:38

#include<reg51.h>
#include<string.h>
#define LCD1602_DB P2

sbit LCD1602_RS = P3^5;
sbit LCD1602_RW = P3^6;
sbit LCD1602_E = P3^7;
void InitLcd1602() ;
void LcdWaitReady() ;
void LcdWriteCmd(unsigned char cmd) ;
void LcdwriteDat(unsigned char dat) ;
void LcdSetCursor(unsigned char x,unsigned char y) ;
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str) ;

void main()
{
unsigned char str[]="My NO:19031105";
      //init_uart();初始化串口
      InitLcd1602();
      LcdShowStr(0,0,str);
      LcdShowStr(0,1,"Welcome to JYPC");
}

void LcdWaitReady()
{
      unsigned char sta;
LCD1602_DB = 0xFF;
      LCD1602_RS = 0;
      LCD1602_RW = 1;
      do
      {
      LCD1602_E = 1;
      sta = LCD1602_DB;
      LCD1602_E = 0;
      }
      while(sta & 0x80);
}

void LcdWriteCmd(unsigned char cmd)
{
      LcdWaitReady();
      LCD1602_RS = 0;
      LCD1602_RW = 0;
      LCD1602_DB = cmd;
      LCD1602_E = 1;
      LCD1602_E = 0;
}

void LcdWriteDat(unsigned char dat)
{
      LcdWaitReady();
      LCD1602_RS = 1;
      LCD1602_RW = 0;
      LCD1602_DB = dat;
      LCD1602_E = 1;
      LCD1602_E = 0;
}

void LcdSetCursor(unsigned char x, unsigned char y)
{
      unsigned char addr;
      if(y == 0)
            addr = 0x00 + x;
      else
            addr = 0x40 + x;
      LcdWriteCmd(addr | 0x80);
}

void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str)
{
      LcdSetCursor(x,y);
      while(*str != '\0')
      {
      LcdWriteDat(*str++);
      }
}

void InitLcd1602()
{
      LcdWriteCmd(0x38);
      LcdWriteCmd(0x0C);//开显示，不显示光标，且不闪烁
      LcdWriteCmd(0x06);//每次写入数据后地址指针加1
      LcdWriteCmd(0x01);//清屏
}

ID:928284 · 发表于 2021-11-30 15:52

和教程上的程序一样的，缺水了文字说明。理解意义不大。

ID:719082 · 发表于 2022-2-4 21:33

我用LCD1602一直呈现一个现象就是运行一段时间之后，屏幕出现乱码，用了您这个程序测试之后，好了，谢谢

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