/////////////////1602显示///////////
#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit wela = P2^7;
sbit dula = P2^6;
uchar code LCD1602firstline[] = " I LOVE YOU ";
uchar code LCD1602secondline[] = " WELCOME ";
sbit LCDRS = P3^5;
sbit LCDWR = P3^6;
sbit LCDEN = P3^4;
void Delay1MS(uint z)
{
uint x,y;
for(x=z;x>0;x--)
{
for(y=124;y>0;y--);
}
/*uint i = 124;
while (z--) //为什么改成这样就不可以了呢
{
i--;
}*/
}
void WriteCom1602(uchar com)
{
LCDEN = 0;
LCDRS = 0;
LCDWR = 0;
P0 = com;
LCDEN = 1;
Delay1MS(1);
LCDEN = 0;
}
void WriteDat1602(uchar dat)
{
LCDEN = 0;
LCDRS = 1;
LCDWR = 0;
P0 = dat;
LCDEN = 1;
Delay1MS(1);
LCDEN = 0;
}
void Writechar1602(uchar x , uchar y , uchar date )
{
x &= 0x0f;
y &= 0x01;
if (y==1)
{
x += 0x40;
}
x += 0x80;
WriteCom1602(x);
WriteDat1602(date);
}
void LCD1602Init()
{
LCDEN = 0 ;
WriteCom1602(0x38);
WriteCom1602(0x01);
WriteCom1602(0x06);
WriteCom1602(0x0c);
}
void main()
{
uint i = 0 ;
P0 = 0xff ; //ÊýÂë¹Ü¹Ø¶Ï
wela = 1 ;
wela = 0;
Delay1MS(5);
LCD1602Init();
for (i=0 ; i<12 ; i++)
{
Writechar1602(i ,0 , LCD1602firstline);
}
for (i=0 ; i<9 ; i++)
{
Writechar1602(i , 1, LCD1602secondline);
}
while(1);
}
/*
汗,今天我调了好久才发现好像延迟函数出了问题
上面Delay1MS()改成下面之后1602不能显示,是不是我延时函数写的不对
新手求教,还有一般延时函数怎么写好呢
*/
友情提示: 此问题已得到解决,问题已经关闭,关闭后问题禁止继续编辑,回答。
while (z--) //为什么改成这样就不可以了呢
{
i--;
}
这个循环在干什么?
z一直减到0退出循环,i在每次循环里就减一次
看起来是时间不够
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