/*------------------------------------------------------------------------------
函数说明
------------------------------------------------------------------------------*/
void LCD_init(void);
void LCD_en_write(void);
void LCD_write_command(unsigned char command) ;
void LCD_write_data(unsigned char data);
void LCD_set_xy (unsigned char x, unsigned char y);
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s);
void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data);
void delay_nus(unsigned int n);
void delay_nms(unsigned int n);
==============================================================================
#include "LCD.h"
void LCD_init(void) //液晶初始化
{
LCD_DATA_DDR|=LCD_DATA; //数据口方向为输出
LCD_EN_DDR|=LCD_EN; //设置EN方向为输出
LCD_RS_DDR|=LCD_RS; //设置RS方向为输出
LCD_write_command(0x28);
LCD_en_write();
delay_nus(40);
LCD_write_command(0x28); //4位显示
LCD_write_command(0x0c); //显示开
LCD_write_command(0x01); //清屏
delay_nms
(2);
}
void LCD_en_write(void) //液晶使能
{
LCD_EN_PORT|=LCD_EN;
delay_nus
(1);
LCD_EN_PORT&=~LCD_EN;
}
void LCD_write_command(unsigned char command) //写指令
{
delay_nus(16);
LCD_RS_PORT&=~LCD_RS; //RS=0
LCD_DATA_PORT&=0X0f; //清高四位
LCD_DATA_PORT|=command&0xf0; //写高四位
LCD_en_write();
command=command<<4; //低四位移到高四位
LCD_DATA_PORT&=0x0f; //清高四位
LCD_DATA_PORT|=command&0xf0; //写低四位
LCD_en_write();
}
void LCD_write_data(unsigned char data) //写数据
{
delay_nus(16);
LCD_RS_PORT|=LCD_RS; //RS=1
LCD_DATA_PORT&=0X0f; //清高四位
LCD_DATA_PORT|=data&0xf0; //写高四位
LCD_en_write();
data=data<<4; //低四位移到高四位
LCD_DATA_PORT&=0X0f; //清高四位
LCD_DATA_PORT|=data&0xf0; //写低四位
LCD_en_write();
}
void LCD_set_xy( unsigned char x, unsigned char y ) //写地址函数
{
unsigned char address;
if (y == 0) address = 0x80 + x;
else address = 0xc0 + x;
LCD_write_command( address);
}
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s) //列x=0~15,行y=0,1
{
LCD_set_xy( X, Y ); //写地址
while (*s) // 写显示字符
{
LCD_write_data( *s );
s ++;
}
}
void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data) //列x=0~15,行y=0,1
{
LCD_set_xy( X, Y ); //写地址
LCD_write_data( data);
}
=======================================================================
void delay_1us(void) //1us延时函数
{
asm("nop");
}
void delay_nus(unsigned int n) //N us延时函数
{
unsigned int i=0;
for (i=0;i delay_1us();
}
void delay_1ms(void) //1ms延时函数
{
unsigned int i;
for (i=0;i<1140;i++);
}
void delay_nms(unsigned int n) //N ms延时函数
{
unsigned int i=0;
for (i=0;i delay_1ms();
}
=========================================================================
#include "LCD.h"
void init_devices(void)
{
CLI(); //disable all interrupts
LCD_init();
MCUCR = 0x00;
GICR = 0x00;
TIMSK = 0x00; //timer interrupt sources
SEI(); //re-enable interrupts
}
//main.c文件
#include"LCD.h"
void main(void)
{
init_devices();
LCD_write_string(1,0,"Hi!
!
");
for(;;)
{
LCD_write_string(0,1,"archeng504");
LCD_write_char(6,0,'8');
}
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