1602设置 不显示光标命令 失效 。输出后面还是有个光标

Question

#include<reg52.h>
#include<stddef.h>
#define uchar unsigned char
sbit lcden=P3^4;
sbit lcdrs=P3^5;
sbit dula=P2^6;
sbit wela=P2^7;
uchar num;
uchar code table2[]=" 2021/9/18";
void delayms(uchar i) //yanshi ms
{ uchar j;
for(i;i>0;i--)
for(j=110;j>0;j--);
}
void write_com(uchar com)
{ lcdrs=0;
P0=com;delayms(5);
lcden=1; delayms(5);
lcden=0;
}
void write_data(uchar datas)
{ lcdrs=1;
P0=datas;delayms(5);
lcden=1; delayms(5);
lcden=0;
}
void init()
{
wela=0; //suocunqi,,bimianyingxiang
dula=0;
lcden=0; //xie mingling
write_com(0x38); // kai xianshishanshuo guangbiao
write_com(0x0c);
write_com(0x06);
write_com(0x01);
}
void main()
{ init();
write_com(0x80); //guangbiaozhiyu diyihang
for(num=0;num<sizeof(table2);num++)
{
write_data(table2[num]);
delayms(5);
}
while(1);
}

Answer 1

不好意思，是我用错了sizeof函数，writedata输出null时，1602补了光标。