利用1602A液晶屏显示
通过地址变量实现渐入显示
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit lcden=P3^4;
sbit rs=P3^5;
sbit rw=P3^6;
sbit dula=P2^6;
sbit wela=P2^7;
uchar table1[]=" Welcome! ";
uchar table2[]=" which one? ";
void delay(uint x)
{
uint a,b;
for(a=x;a>0;a--)
for(b=10;b>0;b--);
}
void delay1(uint x）
{
uint a,b;
for(a=x;a>0;a--)
for(b=100;b>0;b--);
}
void write_com(uchar com)
{
P0=com;
rs=0;
lcden=0;
delay(10);
lcden=1;
delay(10);
lcden=0;
}
void write_date(uchar date)
{
P0=date;
rs=1;
lcden=0;
delay(10);
lcden=1;
delay(10);
lcden=0;
}
void init()
{
rw=0;
dula=0;
wela=0;
write_com(0x38);
delay(20);
write_com(0x0f);
delay(20);
write_com(0x06);
delay(20);
write_com(0x01);
delay(20);
}
void main()
{
uchar a;
init();
write_com(0x80+17);
delay(20);
for(a=0;a<13;a++)
{
write_date(table1[a]);
delay(20);
}
write_com(0xc0+17);
delay(50);
for(a=0;a<13;a++)
{
write_date(table2[a]);
delay(40);
}
for(a=0;a<16;a++)
{
write_com(0x18)
delay1(600);
}
while(1);
}
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