1602.c

DS1307的仿真实例

#include"comm.h"
#include"1602.h"

//定义MCU与LCD的接口
#define LCD_EN_PORT    PORTC
#define LCD_RS_PORT    PORTC
#define LCD_DATA_PORT  PORTD
#define LCD_DATA_DDR   DDRD
#define LCD_DATA_PIN   PIND

#define LCD_EN         0x20   //portc5         out
#define LCD_RS         0x10   //portc4         out
#define LCD_DATA       0xf0   //portd4/5/6/7   out

static unsigned char data_temp=0x00;

/*--------------------------------------------------------------------------------------------------
Public function prototypes
--------------------------------------------------------------------------------------------------
void LCD_init         		(void);
void LCD_INIT(void);
void LCD_write_char         (unsigned command,unsigned data);
void LCD_Write_half_char    (void);
void LCD_set_xy             (unsigned char x, unsigned char y);
void LCD_write_string       (unsigned char X,unsigned char Y,unsigned char *s);
void delay_nus              (unsigned int n);
void delay_nms              (unsigned int n);

光标命令
LCD_write_char(0x0e,0);    //光标开
LCD_write_char(0x0d,0);    //光标所在字符闪烁  
LCD_write_char(0x0c,0);    //光标关  
**********************************************************/
/**********************************************************
TC1602B LCD DISPLAY
建立时间：2003年11月9号
修改日期：2003年11月14号
LCD_write函数功能：当command＝0时，向LCD写入数据，否则向LCD写
                   入命令
LCD第一行显示寄存器地址：0X80-0X8F
LCD第二行显示寄存器地址：0XC0-0XCF
**********************************************************/
static void delay_nus              (unsigned int n);
static void delay_nms              (unsigned int n);
static void LCD_write_char         (unsigned command,unsigned data);
static void LCD_Write_half_char    (void);
static void LCD_INIT(void);

static void LCD_INIT(void)
{   
    DDRD |= LCD_DATA;
    DDRC |= LCD_RS | LCD_EN;
    LCD_DATA_PORT = 0x20;
    LCD_EN_PORT |= LCD_EN; // Write data to LCD
    delay_nus(2);
	//delay_nus(1);
    LCD_EN_PORT &= ~LCD_EN;// Disable LCD
    delay_nus(40);
} 

void LCD_init(void)
  {
    LCD_INIT();
    LCD_write_char(0,0x28);      //4bit test
    LCD_write_char(0,0x0c);      //显示开
    LCD_write_char(0,0x01);      //显示清屏
    LCD_write_char(0,0x06);      //显示光标移动设置
  }
/*-----------------------------------------------------------------------
LCD_write_char    : 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，X:0-15，Y:0-1
                    LCD第一行显示寄存器地址：0X80-0X8F
                    LCD第一行显示寄存器地址：0XC0-0XCF

编写日期          ：2003-11-19 
最后修改日期      ：2004-8-19 		
-----------------------------------------------------------------------*/
static void LCD_write_char(unsigned command,unsigned data)
  {       
    if (command == 0)
   	LCD_RS_PORT &= ~LCD_RS;   //RS=0
	else
    LCD_RS_PORT |= LCD_RS;    //RS=1
	
    data_temp = data;
    LCD_Write_half_char();
	data_temp = data;
	data_temp=data_temp << 4;
    LCD_Write_half_char();
	//delay_nus(1);	 
  }
/*---------写高4bit到LCD----*/
static void LCD_Write_half_char(void)
{
   	 LCD_DATA_PORT &= 0X0f; //portd4~7=0 
   	 LCD_DATA_PORT |= data_temp&0xf0; //send high 4bit
	 LCD_EN_PORT |= LCD_EN; //EN端产生一个由低电平变高电平，写LCD
	 delay_nus(2);
     LCD_EN_PORT &= ~LCD_EN; //EN端产生一个由高电平变低电平，写LCD
   	 //LCD_DATA_PORT &= 0X0f; 
	 delay_nus(2); 
   }

/*-----------------------------------------------------------------------
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:0-15，Y:0-1
                    LCD第一行显示寄存器地址：0X80-0X8F
                    LCD第一行显示寄存器地址：0XC0-0XCF

编写日期          ：2004-8-19 
最后修改日期      ：2004-8-19 		
-----------------------------------------------------------------------*/
void LCD_set_xy( unsigned char x, unsigned char y )
  {
    unsigned char address;
    if (y == 0) address = 0x80 + x;
    else 
       address = 0xc0 + x;
    LCD_write_char(0,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

编写日期          ：2004-8-19 
最后修改日期      ：2004-8-19 		
-----------------------------------------------------------------------*/
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)
  {
    LCD_set_xy( X, Y );
    
    while (*s) 
      {
        LCD_write_char(1,*s);
	s ++;
      }
  }
  /*-----------------------------------------------------------------------
延时函数
系统时钟：8M
-----------------------------------------------------------------------*/
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<n;i++)
   delay_1us();
  }
  
void delay_1ms(void)                 //1ms延时函数
  {
   unsigned int i;
   for (i=0;i<1140;i++);
  }
  
/************
static void delay_nms(unsigned int n)       //N ms延时函数
  {
   unsigned int i=0;
   for (i=0;i<n;i++)
   delay_1ms();
  }
********************/
/****************************  
void main(void)
  {
     //OSCCAL=0X9C;
	 LCD_init();	 
     //LCD_write_string(2,0,"We");
     while(1)
       {delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
	     LCD_write_char(0,0x01);  //显示清屏
		 delay_nms(2);		 
		 LCD_write_string(5,0,"Welcome");
		 LCD_write_string(1,1,"www.527dz.com!");
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 delay_nms(2000);
		 
		 LCD_write_char(0,0x01);  //显示清屏
		 delay_nms(2);		 
		 LCD_write_string(0,0,"Tel:[phone]");
		 LCD_write_string(0,1,"[e-mail]");
		 delay_nms(2000);
       }
}
************************************/