lcd1602只亮不显示求帮助 -

标题: lcd1602只亮不显示求帮助 [打印本页]

作者: adadad123 时间: 2019-12-20 10:41
标题: lcd1602只亮不显示求帮助
#include <reg51.h>

sbit       rw=P3^3;
sbit       rs=P3^2;
sbit       en=P3^4;

char hour=10;
char minute=13;
char second=30;
char count=20;
char time[8];

void LCD_startup();
void LCD_inst(char);
void LCD_ldata(char);
void delay1ms(char);
void time1(void);
main()
{
      char num;
      LCD_startup();
      IE=0X82; //T0
      TMOD=0X01;
      TH0=(65636-50000)/256; //50ms
      TL0=(65636-50000)%256;
      TR0=1;
      while(1)
      {
            time1();
            LCD_inst(0x80);
            for(num=0;num<8;num++)
            {
                     LCD_ldata(time[num]);
            }
      }
}

void LCD_startup()
{
      LCD_inst(0x38);
      LCD_inst(0x08);
      LCD_inst(0x01);
      LCD_inst(0x06);
      LCD_inst(0x0C);
}
void LCD_inst(char inst)
{
      en=0;
      rs=0;
      rw=0;
      delay1ms(5);
      en=1;
      P2=inst;
      delay1ms(5);
      en=0;
}
void LCD_ldata(char ldata)
{
      en=0;
      rs=1;
      rw=0;
      delay1ms(5);
      en=1;
      P2=ldata;
      delay1ms(5);
      en=0;
}
void delay1ms(char x)
{
      char i,j;
      for(i=0;i<x;i++)
      {
            for(j=0;j<120;j++)
            {;}
      }
}
void t0(void) interrupt 1
{
      TH0=(65636-50000)/256; //50ms
      TL0=(65636-50000)%256;
      if(--count==0)
      {
            count=20;
            second++;
            if(second==60)
            {
                     second=0;
                     minute++;
                     if(minute==60)
                     {
                              minute=0;
                              hour++;
                              if(hour==13)
                                    hour=0;
                     }
            }
      }
}
void time1(void)
{
      time[0]=hour/10+0X30;
      time[1]=hour%10+0X30;
      time[2]=':';
      time[3]=minute/10+0X30;
      time[4]=minute%10+0X30;
      time[5]=':';
      time[6]=second/10+0X30;
      time[7]=second%10+0X30;
}

作者: zhangyy 时间: 2020-1-20 16:19
3脚接电位器，调节电压

作者: w1179benp 时间: 2020-3-14 22:39
程序跑着正常，看看硬件吧

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