#include <iom16v.h>
#include <macros.h> 
#define LCD_RS   (1 << 4)
#define LCD_RW   (1 << 5)
#define LCD_E    (1 << 7)
#define set_e()  (PORTD |= LCD_E)
#define set_rs() (PORTD |= LCD_RS)
#define set_rw() (PORTD |= LCD_RW)
#define clr_e()  (PORTD &= ~LCD_E)
#define clr_rs() (PORTD &= ~LCD_RS)
#define clr_rw() (PORTD &= ~LCD_RW)
#define uchar unsigned char
#define uint unsigned int
/*-----------------------------------------------------------
delay       ：短延時(shí)函數(shù)
輸入?yún)?shù) x  ：粗略延時(shí)，x越大，延時(shí)越長(zhǎng)
輸出參數(shù)    ：無
------------------------------------------------------------*/
void delay(uint dk)
{
  while(dk--);
 }
/*------------------------------------------------------------
lcdwait   ：液晶延時(shí)函數(shù)
輸入?yún)?shù)  ：無
輸出參數(shù)  ：無
--------------------------------------------------------------*/
void lcdwait(void)
{
  delay(600);
 }
/*-----------------------------------------------------------
lcdpulse   ：脈沖函數(shù)，把數(shù)據(jù)寫入1602液晶
輸入?yún)?shù)   ：無
輸出參數(shù)   ：無
---------------------------------------------------------------*/
void lcdpulse(void)
{
  set_e();
  clr_e();
 }

/*----------------------------------------------------------------
lcdsend       ：發(fā)送一字節(jié)數(shù)據(jù)函數(shù)
輸入?yún)?shù) data ：要發(fā)送字節(jié)數(shù)據(jù)
輸出參數(shù)      ：無
------------------------------------------------------------------*/
void lcdsend(uchar data)
{
  lcdwait();
  PORTB=data;
  lcdpulse();
 }
/*------------------------------------------------------------------
wcom          ：寫一字節(jié)控制字函數(shù)
輸入?yún)?shù) com  ：要寫入控制字
輸出參數(shù)      ：無
-----------------------------------------------------------------*/
void wcom(uchar com)
{
  clr_rs();
  clr_rw();
  lcdsend(com);
  lcdwait();
 }

/*--------------------------------------------------------------
wdat          ：顯示一字節(jié)函數(shù)
輸入?yún)?shù) com  ：要顯示字符ASCⅡ碼
輸出參數(shù)      ：無
----------------------------------------------------------------*/
void wdat(uchar dat)
{
  set_rs();
  clr_rw();
  lcdsend(dat);
  lcdwait();
 }
/*------------------------------------------------------------------
LCM1602Reset  ：LCM1602復(fù)位
輸入?yún)?shù)      ：無
輸出參數(shù)      ：無
------------------------------------------------------------------*/
void LCM1602Reset(void)
{
  delay(65000);
  wcom(0x38);
  delay(5000);
  wcom(0x38);
  delay(5000);
  wcom(0x38);
  delay(5000);
  wcom(0x38);
 }

/*------------------------------------------------------------------
lcdinit       ：LCM1602初始化
輸入?yún)?shù)      ：無
輸出參數(shù)      ：無
-------------------------------------------------------------------*/
void lcdinit(void)
{
  wcom(0x01);           //清屏
  wcom(0x3c);           //顯示開關(guān)控制：8bit，2行顯示，5x7
  wcom(0x0c);           //光標(biāo)開，閃爍關(guān)
  wcom(0x06);           //輸入方式，增量方式，不移動(dòng)
 }

/*-----------------------------------------------------------------
disp_string   ：顯示一字符串函數(shù)
輸入?yún)?shù) data ：字符串指針
輸出參數(shù)      ：無
------------------------------------------------------------------*/
void disp_string( uchar *data )
{
  while(*data!=0) {wdat(*data);data++;}
 }

                                           //設(shè)置顯示坐標(biāo):X 0~39,Y:0~1
#define setxy(x,y) wcom(((x)|((y)<<6))|0x80) 

/*--------------------------------------------------------------
main       ：主函數(shù)
輸入?yún)?shù)   ：無
輸出參數(shù)   ：無
--------------------------------------------------------------*/
void main()
{
  DDRD=0xff;
  DDRB=0xff;
  LCM1602Reset();
  lcdinit();
  setxy(0,0);
  disp_string("Easy Learning..");
  setxy(2,1);
  disp_string("Avr Studio! ");

  while(1)
    {
      wcom(0x08);   //顯示關(guān)
      delay(65000);
      delay(65000);
      delay(65000);
      delay(65000);
      delay(65000);
      delay(65000);
      delay(65000);
      delay(65000);

      wcom(0x0c);   //顯示開
      delay(65000);
      delay(65000);
      delay(65000);
      delay(65000);
      delay(65000);
      delay(65000);
      delay(65000);
     }
 }