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#include<STC12C5A60S2.h> //包含頭文件，一般情況不需要改動，頭文件包含特殊功能寄存器的定義
#include<intrins.h>
sbit RS = P1 ^ 0; //定義端口
sbit RW = P1 ^ 1;
sbit EN = P2 ^ 5;
sbit DS = P2 ^ 2;
unsigned char code Table[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
bit flag;
unsigned char xdata a, b;
#define DataPort P0
/************************LCD1602函數************************/
/******延時函數******/
void DelayUs2x(unsigned char t)
{
while(--t);
}
/******延時函數******/
void DelayMs(unsigned char t)
{
while(t--)
{
//大致延時1mS
DelayUs2x(245);
DelayUs2x(245);
}
}
/******判忙函數******/
bit LCD_Check_Busy(void)
{
DataPort = 0xFF;
RS = 0;
RW = 1;
EN = 0;
_nop_( );
EN = 1;
return (bit)(DataPort & 0x80);
}
/******寫入命令函數******/
void LCD_Write_Com(unsigned char com)
{
while(LCD_Check_Busy( )); //忙則等待
RS = 0;
RW = 0;
EN = 1;
DataPort = com;
_nop_( );
EN = 0;
}
/******寫入數據函數******/
void LCD_Write_Data(unsigned char Data)
{
while(LCD_Check_Busy( )); //忙則等待
RS = 1;
RW = 0;
EN = 1;
DataPort = Data;
_nop_( );
EN = 0;
}
/******清屏函數******/
void LCD_Clear(void)
{
LCD_Write_Com(0x01);
DelayMs(5);
}
/******寫入字符串函數******/
void LCD_Write_String(unsigned char x, unsigned char y, unsigned char *s)
{
if (y == 0)
{
LCD_Write_Com(0x80 + x); //表示第一行
}
else
{
LCD_Write_Com(0xc0 + x); //表示第二行
}
while (*s)
{
LCD_Write_Data(*s);
s ++;
}
}
/******寫入字符函數******/
void LCD_Write_Char(unsigned char x, unsigned char y, unsigned char Data)
{
if (y == 0)
{
LCD_Write_Com(0x80 + x);
}
else
{
LCD_Write_Com(0xc0 + x);
}
LCD_Write_Data(Data);
}
/******初始化函數******/
void LCD_Init(void)
{
LCD_Write_Com(0x38); /*顯示模式設置*/
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
LCD_Write_Com(0x08); /*顯示關閉*/
LCD_Write_Com(0x01); /*顯示清屏*/
LCD_Write_Com(0x06); /*顯示光標移動設置*/
DelayMs(5);
LCD_Write_Com(0x0c); /*顯示開及光標設置*/
}
/************************DS18B20函數************************/
/******延時函數******/
void DS18B20_Delay(unsigned int j)//延時j * 1us
{
unsigned int i;
for(i = 0; i < j; i ++)
{
_nop_( );//@11.0592M晶振(12M晶振:_nop_( );_nop_( );)
}
}
/******初始化/復位函數******/
void DS_Rest( )
{
DS = 1;
DS18B20_Delay(60);
DS = 0;
DS18B20_Delay(700);
DS = 1;
DS18B20_Delay(150);
if(DS == 0)
{
flag = 1;
}
else
{
flag = 0;
}
DS18B20_Delay(200);
}
/******位讀取函數******/
bit DS_Read_Bit( )
{
bit Dat;
DS = 0;
_nop_( );_nop_( );
DS = 1;
_nop_( );
Dat = DS;
DS18B20_Delay(100);
return Dat;
}
/******字節讀取函數******/
unsigned char DS_Read_Byte( )
{
unsigned char idata i, j, k;
for(i = 0; i < 8; i ++)
{
j = DS_Read_Bit( );
k = (j << 7) | (k >> 1);
}
return k;
}
/******字節寫函數******/
void DS_Write_Byte(unsigned char Dat)
{
unsigned char idata i;
for(i = 0; i < 8; i ++)
{
DS = 0;
_nop_( );
DS = Dat & 0x01;
DS18B20_Delay(70);
DS = 1;
Dat >>= 1;
}
DS18B20_Delay(70);
}
/******讀取溫度數據函數******/
void Read_Temperature( )
{
unsigned char xdata tvalue_L, tvalue_H;
float num;
DS_Rest( );
DS_Write_Byte(0xcc);
DS_Write_Byte(0xbe);
tvalue_L = DS_Read_Byte( );
tvalue_H = DS_Read_Byte( );
tvalue_H <<= 4;
tvalue_H += (tvalue_L & 0xf0) >> 4;
a = tvalue_H;
num = (tvalue_L & 0x0f) * 0.0625;
b = (unsigned char)(num * 100);
}
/******溫度顯示函數******/
void DS18B20_Display( )
{
LCD_Write_String(0, 0, "The Temperature:");
LCD_Write_Char(0, 1, Table[a / 10]);
LCD_Write_Char(1, 1, Table[a % 10]);
LCD_Write_Char(2, 1, '.');
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