51单片机——LCD1602

1.LCD1602显示一个字符C

#include "reg52.h"
#include "intrins.h"
/*
RS  -- P1.0
RW  -- P1.1 
E   -- P1.4 */
#define databuffer  P0 //定义8位数据线，Po端口组
sbit RS = P1^0;
sbit RW = P1^1;
sbit EN = P1^4;void check_busy()
{char tmp = 0x80;databuffer = 0x80;while(tmp & 0x80){//1000 0000RS = 0;RW = 1;EN = 0;_nop_();EN = 1;_nop_();_nop_();tmp = databuffer;EN = 0;_nop_();}
}void Write_Cmd_Func(char cmd)
{check_busy();RS = 0;RW = 0;EN = 0;_nop_();databuffer = cmd;_nop_();EN = 1;_nop_();_nop_();EN = 0;_nop_();	
}void Write_Data_Func(char dataShow)
{check_busy();RS = 1;RW = 0;EN = 0;_nop_();databuffer = dataShow;_nop_();EN = 1;_nop_();_nop_();EN = 0;_nop_();	
}void Delay15ms()		//@11.0592MHz
{unsigned char i, j;i = 27;j = 226;do{while (--j);} while (--i);
}
void Delay5ms()		//@11.0592MHz
{unsigned char i, j;i = 9;j = 244;do{while (--j);} while (--i);
}void LCD1602_INIT()
{//（1）延时 15msDelay15ms();
//（2）写指令 38H(不检测忙信号) Write_Cmd_Func(0x38);
//（3）延时 5msDelay5ms();
//（4）以后每次写指令，读/写数据操作均需要检测忙信号
//（5）写指令 38H：显示模式设置Write_Cmd_Func(0x38);
//（6）写指令 08H：显示关闭Write_Cmd_Func(0x08);
//（7）写指令 01H：显示清屏Write_Cmd_Func(0x01);
//（8）写指令 06H：显示光标移动设置Write_Cmd_Func(0x06);
//（9）写指令 0CH：显示开及光标设置}Write_Cmd_Func(0x0c);
}void main()
{char position = 0x80 + 0x05;char dataShow = 'C';LCD1602_INIT();Write_Cmd_Func(position);//选择要显示的地址Write_Data_Func(dataShow);//发送要显示的字符}

2.LCD1602显示一行

#include "reg52.h"
#include "intrins.h"
/*
RS  -- P1.0
RW  -- P1.1 
E   -- P1.4 */
#define databuffer  P0 //定义8位数据线，Po端口组
sbit RS = P1^0;
sbit RW = P1^1;
sbit EN = P1^4;void check_busy()
{char tmp = 0x80;databuffer = 0x80;while(tmp & 0x80){//1000 0000RS = 0;RW = 1;EN = 0;_nop_();EN = 1;_nop_();_nop_();tmp = databuffer;EN = 0;_nop_();}
}void Write_Cmd_Func(char cmd)
{check_busy();RS = 0;RW = 0;EN = 0;_nop_();databuffer = cmd;_nop_();EN = 1;_nop_();_nop_();EN = 0;_nop_();	
}void Write_Data_Func(char dataShow)
{check_busy();RS = 1;RW = 0;EN = 0;_nop_();databuffer = dataShow;_nop_();EN = 1;_nop_();_nop_();EN = 0;_nop_();	
}void Delay15ms()		//@11.0592MHz
{unsigned char i, j;i = 27;j = 226;do{while (--j);} while (--i);
}
void Delay5ms()		//@11.0592MHz
{unsigned char i, j;i = 9;j = 244;do{while (--j);} while (--i);
}void LCD1602_INIT()
{//（1）延时 15msDelay15ms();
//（2）写指令 38H(不检测忙信号) Write_Cmd_Func(0x38);
//（3）延时 5msDelay5ms();
//（4）以后每次写指令，读/写数据操作均需要检测忙信号
//（5）写指令 38H：显示模式设置Write_Cmd_Func(0x38);
//（6）写指令 08H：显示关闭Write_Cmd_Func(0x08);
//（7）写指令 01H：显示清屏Write_Cmd_Func(0x01);
//（8）写指令 06H：显示光标移动设置Write_Cmd_Func(0x06);
//（9）写指令 0CH：显示开及光标设置}Write_Cmd_Func(0x0c);
}void LCD1602_showLine(char row, char col, char *string)
{switch(row){case 1:Write_Cmd_Func(0x80+col);while(*string){Write_Data_Func(*string);string++;}break;case 2:Write_Cmd_Func(0x80+0x40+col);while(*string){Write_Data_Func(*string);string++;}break;}
}void main()
{char position = 0x80 + 0x05;//char dataShow = 'C';LCD1602_INIT();LCD1602_showLine(1,5,"NO.1");LCD1602_showLine(2,0,"clc handsome");}