基于51單片機(jī)的簡(jiǎn)易計(jì)算器1602顯示

#include
#include
#include
#define uchar unsigned char
#define uint unsigned int
#define CHECK_BUSY
sbit RS = P2^4;
sbit RW = P2^5;
sbit EN = P2^6;
void DelayMs(int z)
{
int x,y;
for (x=z;x>0;x--)
for(y=110;y>0;y--);
}
/***********判忙函數(shù)***********/
bit LCD_Check_Busy()
{
#ifdef CHECK_BUSY
P0= 0xFF;
RS=0;
RW=1;
EN=0;
_nop_();
EN=1;
return (bit)(P0 & 0x80);
#else
return 0;
#endif
}
/***********寫(xiě)入命令函數(shù)***********/
void write_com(uchar com)
{
while(LCD_Check_Busy()); //忙則等待
RS=0;
RW=0;
EN=1;
P0= com;
_nop_();
EN=0;
}
/**********寫(xiě)入數(shù)據(jù)函數(shù)**********/
void write_dat(uchar dat)
{
while(LCD_Check_Busy()); //忙則等待
RS=1;
RW=0;
EN=1;
P0= dat;
_nop_();
EN=0;
}
/*******寫(xiě)入字符函數(shù)***********/
void LCD_Write_Char(uchar x,uchar y,uchar dat)
{
if (y == 0)
{
write_com(0x80 + x);
}
else
{
write_com(0xC0 + x);
}
write_dat( dat);
}
/******寫(xiě)入字符串函數(shù)***********/
void Write_String(uchar x,uchar y,uchar *s)
{

while (*s)
{
LCD_Write_Char(x,y,*s);
s++;
x++;
}
}
/*****初始化函數(shù)******/
void LCD_Init()
{
write_com(0x38); /*顯示模式設(shè)置*/
DelayMs(5);
write_com(0x06);/*顯示光標(biāo)移動(dòng)設(shè)置*/
DelayMs(5);
write_com(0x0C); /*顯示開(kāi)及光標(biāo)設(shè)置*/
write_com(0x01); /*顯示清屏*/
}