main.c

内外差值法

#include <hidef.h> /* for EnableInterrupts macro */
#include "derivative.h" /* include peripheral declarations */
#include <MC9S08AW60.h>
//char  sensor_temp_disp[]="000.00";

#define LCD_DATA_PORT PTBD
#define RS PTDD_PTDD4
#define RW PTDD_PTDD5
#define EN PTDD_PTDD6
#define LOW  0
#define HIGH 1
#define Clear_screen        0x01
#define Disp_on             0x0c
#define Disp_off            0x08
#define Cursor_on           0x0e
#define Cursor_off          0x0c
#define Cursor_flicker_on   0x0f
#define Cursor_flicker_off  0x0e

 void LCD_delay(unsigned char d)
 {
    while(d--)
    {
      __RESET_WATCHDOG();
    }
 } 

void MCU_Init(void)
{
   ICGC1=0X78;
   ICGC2=0X01;
}

void Lcd12864_Write_Data(char Data)
{
    RS=HIGH;
    RW=LOW;
    LCD_DATA_PORT=Data;
    LCD_delay(100);
    EN=HIGH;
    LCD_delay(100);
    EN=LOW;
    LCD_DATA_PORT=0xFF; 
    LCD_delay(100);
    LCD_delay(100);
}

void Lcd12864_Write_Command(char Command_Code)
{
    RS=LOW;
    RW=LOW;
    LCD_DATA_PORT=Command_Code;
    LCD_delay(100);
    EN=HIGH ;
    LCD_delay(100);
    EN=LOW;
    LCD_delay(100);
    LCD_delay(100);      
}

void Lcd12864_set_xy(unsigned char x, unsigned char y)
{
    unsigned char p;
    switch(x)
    {
        case 0: p = 0x80; break; //第一行开始地址
        case 1: p = 0x88; break; //第二行
        case 2: p = 0x90; break; //第三行
        case 3: p = 0x98; break; //第四行
    }
    p += y;
    __RESET_WATCHDOG();
    Lcd12864_Write_Command(p);
}	 

void Lcd12864_Write_words(char x, char y, char *str)
{
    unsigned char i = 0;
    Lcd12864_set_xy(x,y);
    while(str[i] != '\0')
    {
        Lcd12864_Write_Data(str[i++]);
    }
}



void Lcd12864_Int(void)
{
    LCD_delay(20);
    Lcd12864_Write_Command(0x30);
    LCD_delay(20);
    Lcd12864_Write_Command(Disp_on);  /*开显示，不显示光标*/
    LCD_delay(20);
    Lcd12864_Write_Command(Clear_screen);  /*显示清屏。*/
    LCD_delay(20);
    Lcd12864_set_xy(0,0);
}
void main(void) 
{
  MCU_Init(); 
  PTBDD=0XFF;
  PTDDD=0XFF; 
  Lcd12864_Int();
  Lcd12864_Write_Command(Clear_screen);  /*显示清屏。*/
  Lcd12864_set_xy(0,0);  
  Lcd12864_Write_words(0,1,"北京欢迎您！"); 
  Lcd12864_Write_words(1,0,"One word one dream！"); 
    for(;;) {
    __RESET_WATCHDOG();
   }                         /* feeds the dog */
                             /* please make sure that you never leave this function */
}