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lcd_1602_6wires.c
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/*****************************************************
*File name:lcd_1602_6wires.c
*Author:Andy Zhu
*Date:2008.7.25
*Version:V1.01
*****************************************************/
#include <avr/io.h>
#include <util/delay.h>
#include "LCD_1602_6wires.h"
//==================================================
void LCD_init(void)
{
/*****************液晶使用的I/O口初始化*******************/
LCD_DATA_PORT = 0X00;
LCD_DATA_DDR |= LCD_DATA;
LCD_CONTROL_DDR |= RS|EN;
// BK_LIGHT_ON(); //开液晶背光
/*********************液晶初始化**************************/
_delay_ms(50);
LCD_write_byte(1,0x28); //4bit test 显示模式设置(不检测忙信号)
_delay_ms(1);
LCD_write_byte(1,0x08); // 显示关闭
_delay_ms(1);
LCD_write_byte(1,0x01); // 显示清屏
_delay_ms(1);
LCD_write_byte(1,0x06); // 显示光标移动设置
_delay_ms(1);
LCD_write_byte(1,0x0C); // 显示开及光标设置
_delay_ms(10);
}
/*--------------------------------------------------
LCD_write_byte : 英文字符显示函数
输入参数：*s ：英文字符串指针；
X、Y : 显示字符串的位置，X:1-16，Y:1-2
---------------------------------------------------*/
void LCD_write_byte(unsigned char cmd,unsigned char data)
{
unsigned char data_temp;
if (cmd==1)
{
CLR_RS();
}
if (cmd==0)
{
SET_RS();
}
data_temp=data;
//data_temp=data_temp>>4;
LCD_Write_half_byte(data_temp);
data_temp=data<<4;
LCD_Write_half_byte(data_temp);
_delay_ms(1);
}
/*----------------写高4bit到LCD------------------------*/
void LCD_Write_half_byte(unsigned char half_byte)
{
LCD_DATA_PORT&=0x0f; //
LCD_DATA_PORT=half_byte;//send high 4bit
SET_EN();
_delay_loop_1(1);
CLR_EN();
_delay_loop_1(1);
}
/*----------------------------------------------------
LCD_set_xy : 设置LCD显示的起始位置
输入参数：x、y : 显示字符串的位置，X:1-16，Y:1-2
-----------------------------------------------------*/
void LCD_set_xy( unsigned char x, unsigned char y )
{
unsigned char address;
if (y==1)
{
address=0x80-1+x;
}
else
{
address=0xc0-1+x;
}
LCD_write_byte(1,address);
}
/*---------------------------------------------------
LCD_write_string : 英文字符串显示函数
输入参数：*s ：英文字符串指针；
X、Y : 显示字符串的位置
---------------------------------------------------*/
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)
{
LCD_set_xy( X, Y );
while (*s)
{
LCD_write_byte(0,*s);
s++;
}
}
//=======================================================
void Move(unsigned char step,unsigned char dirction,unsigned int time)
{
unsigned char i;
for(i=0;i<step-1;i++)
{
LCD_write_byte(1,dirction); //字符移动方向
Delay_nms(time); //控制移动时间
}
}
//=========================================================
void Flash_lcd(unsigned int delay_t, unsigned char times)
{
unsigned char j;
for(j=0;j<times;j++)
{
LCD_write_byte(1,0x08);
Delay_nms(delay_t);
LCD_write_byte(1,0x0c);
Delay_nms(delay_t);
}
}
//========================================================
void Delay_nms( unsigned int ms)
{
for (; ms>0; ms--)
{
_delay_ms(1);
}
}
//========================================================