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1602.h
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1602.h
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//#include"STC12C5A.h"
#include <intrins.h>
#define port P1
#define uchar unsigned char
sbit D7=port^7;
sbit D6=port^6;
sbit D5=port^5;
sbit D4=port^4;
sbit EN=port^3;
sbit RW=port^2;
sbit RS=port^1;
sbit LE=port^0;
bit lcd_busy();
void delay( int ms);
void write_com(uchar com);
void write_data(uchar date);
void init_1602();
void xiezfc(uchar hang,uchar lie,uchar *p);//字符串
void Delay1ms();
void delay( int ms)
{
while(ms--)
{
Delay1ms();
}
}
void Delay1ms() //@22.1184MHz
{
unsigned char i, j;
i = 22;
j = 128;
do
{
while (--j);
} while (--i);
}
void write_com(uchar com)//写指令
{
while(lcd_busy());
D7=com&0x80;
D6=com&0x40;
D5=com&0x20;
D4=com&0x10;
RS=0;
RW=0;
EN=0;
EN=1; //先传输高4位
EN=0;
D7=com&0x08; //再传输低4位
D6=com&0x04;
D5=com&0x02;
D4=com&0x01;
RS=0;
RW=0;
EN=0;
EN=1;
EN=0;
RS=0;
RW=0;
delay(5);
}
void write_data(uchar date)//写数据
{
while(lcd_busy());
D7=date&0x80;
D6=date&0x40;
D5=date&0x20;
D4=date&0x10;
RS=1;
RW=0;
EN=0;
EN=1; //使能高4位
EN=0;
D7=date&0x08;
D6=date&0x04;
D5=date&0x02;
D4=date&0x01;
RS=1;
RW=0;
EN=0;
EN=1; //使能低4位
EN=0;
delay(5);
}
bit lcd_busy() //忙碌标志位
{
bit result;
RS = 0;
RW = 1;
EN = 1;
result =D7;
EN = 0;
return result;
}
void xiezfc(uchar hang,uchar lie,uchar *p)
//在指定的位置放入字符串*P为字符串
{ //所在数组的首地址
uchar a;
if(hang == 1) a = 0x80;
if(hang == 2) a = 0xc0;
a = a + lie - 1;
write_com(a);
while(1)
{
if(*p == '\0') break;
write_data(*p);
p++;
}
}
void init_1602()
{
delay(10);//延时一下50
write_com(0x28);//4总线，双行显示，5x7点阵字符
write_com(0x28);
write_com(0x0c);//00001DCB{D:显示(1:开,0:关)
// C:光标(1:显示,0:不显)
// B:光标闪(1:闪,0:不闪)
// }
write_com(0x01);//清屏
}