求指教，1602显示H为什么不行

ID:439927 · 发表于 2019-1-21 19:19

#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit  lcden=P0^5;
sbit  lcdrs=P0^7;
sbit  lcdrw=P0^6;

void read_busy()//判断忙不忙
{
uchar busy;
P2=0xff;
lcdrs = 0 ;
lcdrw = 1;
lcden = 1;
do
{
lcden = 1;
busy = P2;
lcden = 0;
}
while(busy & 0x80);
}

void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void write_com (uchar com)//写一个字节的指令
{
read_busy();//判断忙不忙
lcdrs = 0;
lcdrw = 1;
P2 = com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void write_data(uchar date) //写数据显示
{
read_busy();
lcdrs =1;
lcdrw =0;
P2 = date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void init()
{
lcden=0;
write_com(0x38); //设置16*2
write_com(0x0c); //开显示
write_com(0x06); //地址加一
write_com(0x80); //显示地址
write_com(0x01); //请屏幕
write_data(0x48);
}
void main()
{
init();
while(1);
}

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