lcd1602不顯示?(已解決:vee接地才顯示)

ID:437615 · 發(fā)表于 2019-11-6 10:45

為什么這個(gè)程序在proteus中可以顯示，下載到單片機(jī)后就不能顯示，大家看下怎么回事

#include<stc52.h>
# define uchar unsigned char
sbit RS=P3^5;
sbit RW=P3^6;
sbit E=P3^7;
void Delay5ms();
void write_com(uchar com);
void write_dat(uchar dat);
void init_lcd(void);
uchar x;

uchar code st1[]=" stady-hard";
uchar code st2[]="  ************";
void main()
{
      init_lcd();
      while(1)
      {
            for(x=0;x<13;x++)
            {
               write_dat(st1[x]);
            }
            write_com(0xc0);
            for(x=0;x<14;x++)
            {
               write_dat(st2[x]);
            }
            while(1);
      }
}

void init_lcd(void)
{
            write_com(0x38);             //éèÖÃÏÔê¾μãÕó
            write_com(0x08);
            write_com(0x01);
            write_com(0x06);             //1a±ê1éÎ»
            write_com(0x0f);             //¿aÏÔê¾1a±êéá￡¬0x0c,ÎT1a±ê
}

void write_com(uchar com)
{
            RS=0;
            RW=0;
            E=0;
            P2=com;
            E=1;
            Delay5ms();
            E=0;
}

void write_dat(uchar dat)
{
            RS=1;
            RW=0;
            E=0;
            P2=dat;
            E=1;
            Delay5ms();
            E=0;
}
void Delay5ms()             //@11.0592MHz
{
      unsigned char i, j;

      i = 9;
      j = 244;
      do
      {
            while (--j);
      } while (--i);
}