📄 ds1302.c
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/***********************************************************
实验名称：带有温度显示的数字钟（LCD12864显示）示例程序
程序说明：不能用STC89C52，因为容量不足。把程序烧到STC89C58上，然后正确插上12864，关闭点阵管显示，如果USB供电不足请用外部变压器供电。
作者：RF-X1开发板团队
日期：2008-08-01
***********************************************************/
#include <REG51.H>
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char
sbit DS1302_CLK = P3^2; //实时时钟时钟线引脚
sbit DS1302_IO = P3^3; //实时时钟数据线引脚
sbit DS1302_RST = P3^4; //实时时钟复位线引脚
sbit DQ = P3^5; //温度传送数据IO口
sbit ACC0 = ACC^0;
sbit ACC7 = ACC^7;
uchar hide_sec,hide_min,hide_hour,hide_day,hide_week,hide_month,hide_year; //秒,分,时到日,月,年位闪的计数
sbit Set = P3^5; //模式切换键 对应实验板S4
sbit Up = P3^6; //加法按钮 对应实验板S2
sbit Down= P3^7; //减法按钮 对应实验板S5
//sbit out = P3^4; //立刻跳出调整模式按钮 对应实验板S1
uchar done,count,temp,up_flag,down_flag;
uchar temp_value,temp1_value; //temp_value温度值正数部分 temp1_value温度值小数部分
uchar TempBuffer[8],week_value[3];
void show_time(); //液晶显示程序
//****************************************
//12864液晶显示部分子程序模块
//****************************************
sbit rs = P2^0;
sbit rw = P2^1;
sbit e = P2^2;
#define lcddata P1
sbit busy=P1^7; //lcd busy bit
void wr_d_lcd(uchar content);
void wr_i_lcd(uchar content);
void clrram_lcd (void);
void init_lcd(void);
void busy_lcd(void);
void rev_row_lcd(uchar row);
void rev_co_lcd(uchar row,uchar col,uchar mode);
void clr_lcd(void);
void wr_co_lcd(uchar row,uchar col,uchar lcddata1,uchar lcddtta2);
void wr_row_lcd(uchar row,char *p);
//**********************************
//液晶初始化
//**********************************
void init_lcd(void)
{
wr_i_lcd(0x06); /*光标的移动方向*/
wr_i_lcd(0x0c); /*开显示，关游标*/
}
//***********************************
//填充液晶DDRAM全为空格
//**********************************
void clrram_lcd (void)
{
wr_i_lcd(0x30);
wr_i_lcd(0x01);
}
//***********************************
//对液晶写数据
//content为要写入的数据
//***********************************
void wr_d_lcd(uchar content)
{
busy_lcd();
rs=1;
rw=0;
lcddata=content;
e=1;
;
e=0;
}
//********************************
//对液晶写指令
//content为要写入的指令代码
//*****************************
void wr_i_lcd(uchar content)
{
busy_lcd();
rs=0;
rw=0;
lcddata=content;
e=1;
;
e=0;
}
//********************************
//液晶检测忙状态
//在写入之前必须执行
//********************************
void busy_lcd(void)
{
lcddata=0xff;
rs=0;
rw=1;
e =1;
while(busy==1);
e =0;
}
//********************************
//指定要显示字符的坐标
//*******************************
void gotoxy(unsigned char y, unsigned char x)
{
if(y==1)
wr_i_lcd(0x80|x);
if(y==2)
wr_i_lcd(0x90|x);
if(y==3)
wr_i_lcd((0x80|x)+8);
if(y==4)
wr_i_lcd((0x90|x)+8);
}
//**********************************
//液晶显示字符串程序
//**********************************
void print(uchar *str)
{
while(*str!='\0')
{
wr_d_lcd(*str);
str++;
}
}
//***********************************
//DS1302时钟部分子程序模块
//***********************************
typedef struct __SYSTEMTIME__
{
uchar Second;
uchar Minute;
uchar Hour;
uchar Week;
uchar Day;
uchar Month;
uchar Year;
uchar DateString[11];
uchar TimeString[9];
}SYSTEMTIME; //定义的时间类型
SYSTEMTIME CurrentTime;
#define AM(X) X
#define PM(X) (X+12) // 转成24小时制
#define DS1302_SECOND 0x80 //时钟芯片的寄存器位置,存放时间
#define DS1302_MINUTE 0x82
#define DS1302_HOUR 0x84
#define DS1302_WEEK 0x8A
#define DS1302_DAY 0x86
#define DS1302_MONTH 0x88
#define DS1302_YEAR 0x8C
//**********************************
//实时时钟写入一字节(内部函数)
//**********************************
void DS1302InputByte(uchar d)
{
uchar i;
ACC = d;
for(i=8; i>0; i--)
{
DS1302_IO = ACC0; //相当于汇编中的 RRC
DS1302_CLK = 1;
DS1302_CLK = 0;
ACC = ACC >> 1;
}
}
//*************************************
//实时时钟读取一字节(内部函数)
//*************************************
uchar DS1302OutputByte(void)
{
uchar i;
for(i=8; i>0; i--)
{
ACC = ACC >>1; //相当于汇编中的 RRC
ACC7 = DS1302_IO;
DS1302_CLK = 1;
DS1302_CLK = 0;
}
return(ACC);
}
//**************************************
//ucAddr: DS1302地址, ucData: 要写的数据
//**************************************
void Write1302(uchar ucAddr, uchar ucDa)
{
DS1302_RST = 0;
DS1302_CLK = 0;
DS1302_RST = 1;
DS1302InputByte(ucAddr); // 地址，命令
DS1302InputByte(ucDa); // 写1Byte数据
DS1302_CLK = 1;
DS1302_RST = 0;
}
//**************************************
//读取DS1302某地址的数据
//**************************************
uchar Read1302(uchar ucAddr)
{
uchar ucData;
DS1302_RST = 0;
DS1302_CLK = 0;
DS1302_RST = 1;
DS1302InputByte(ucAddr|0x01); // 地址，命令
ucData = DS1302OutputByte(); // 读1Byte数据
DS1302_CLK = 1;
DS1302_RST = 0;
return(ucData);
}
//******************************************
//获取时钟芯片的时钟数据到自定义的结构型数组
//******************************************
void DS1302_GetTime(SYSTEMTIME *Time)
{
uchar ReadValue;
ReadValue = Read1302(DS1302_SECOND);
Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);//转换为相应的10进制数
ReadValue = Read1302(DS1302_MINUTE);
Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
ReadValue = Read1302(DS1302_HOUR);
Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
ReadValue = Read1302(DS1302_DAY);
Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
ReadValue = Read1302(DS1302_WEEK);
Time->Week = ((ReadValue&0x10)>>4)*10 + (ReadValue&0x0F);
ReadValue = Read1302(DS1302_MONTH);
Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
ReadValue = Read1302(DS1302_YEAR);
Time->Year = ((ReadValue&0xf0)>>4)*10 + (ReadValue&0x0F);
}
//******************************************
//将时间年,月,日,星期数据转换成液
//晶显示字符串,放到数组里DateString[]
//******************************************
void DateToStr(SYSTEMTIME *Time)
{
uchar tab[ ]={0XD2,0XBB,0XB6,0XFE,0XC8,0XFD,0XCB,0XC4,0XCE,0XE5,0XC1,0XF9,0XC8,0XD5};
if(hide_year<2) //这里的if,else语句都是判断位闪烁,<2显示数据,>2就不显示,输出字符串为 2008/08/03
{
Time->DateString[0] = '2';
Time->DateString[1] = '0';
Time->DateString[2] = Time->Year/10 + '0';
Time->DateString[3] = Time->Year%10 + '0';
}
else
{
Time->DateString[0] = ' ';
Time->DateString[1] = ' ';
Time->DateString[2] = ' ';
Time->DateString[3] = ' ';
}
Time->DateString[4]='-';
if(hide_month<2)
{
Time->DateString[5] = Time->Month/10 + '0';
Time->DateString[6] = Time->Month%10 + '0';
}
else
{
Time->DateString[5] = ' ';
Time->DateString[6] = ' ';
}
Time->DateString[7]='-';
if(hide_day<2)
{
Time->DateString[8] = Time->Day/10 + '0';
Time->DateString[9] = Time->Day%10 + '0';
}
else
{
Time->DateString[8] = ' ';
Time->DateString[9] = ' ';
}
if(hide_week<2)
{
week_value[0] =tab[2*(Time->Week%10)-2]; //星期的数据另外放到 week_value[]数组里,跟年,月,日的分开存放,因为等一下要在最后显示
week_value[1] =tab[2*(Time->Week%10)-1];
}
else
{
week_value[0] = ' ';
week_value[1]=' ';
}
week_value[2] = '\0';
Time->DateString[10] = '\0'; //字符串末尾加 '\0' ,判断结束字符
}
//******************************************
//将时,分,秒数据转换成液晶
//显示字符放到数组 TimeString[]
//*****************************************
void TimeToStr(SYSTEMTIME *Time)
{ if(hide_hour<2)
{
Time->TimeString[0] = Time->Hour/10 + '0';
Time->TimeString[1] = Time->Hour%10 + '0';
}
else
{
Time->TimeString[0] = ' ';
Time->TimeString[1] = ' ';
}
Time->TimeString[2] = ':';
if(hide_min<2)
{
Time->TimeString[3] = Time->Minute/10 + '0';
Time->TimeString[4] = Time->Minute%10 + '0';
}
else
{
Time->TimeString[3] = ' ';
Time->TimeString[4] = ' ';
}
Time->TimeString[5] = ':';
if(hide_sec<2)
{
Time->TimeString[6] = Time->Second/10 + '0';
Time->TimeString[7] = Time->Second%10 + '0';
}
else
{
Time->TimeString[6] = ' ';
Time->TimeString[7] = ' ';
}
Time->TimeString[8] = '\0';
}
//******************************
//时钟芯片初始化
//******************************
void Initial_DS1302(void)
{
uchar Second=Read1302(DS1302_SECOND);
if(Second&0x80) //判断时钟芯片是否关闭
{
Write1302(0x8e,0x00); //写入允许
Write1302(0x8c,0x08); //以下写入初始化时间 日期:08/08/03.星期: 3. 时间: 17:59:50
Write1302(0x88,0x08);
Write1302(0x86,0x03);
Write1302(0x8a,0x07);
Write1302(0x84,0x17);
Write1302(0x82,0x59);
Write1302(0x80,0x50);
Write1302(0x8e,0x80); //禁止写入
}
}
//****************************************
//ds18b20子程序模块
//****************************************
/***********ds18b20子程序*************************/
/***********ds18b20延迟子函数（晶振12MHz ）*******/
void delay_18B20(unsigned int i)
{
while(i--);
}
/**********ds18b20初始化函数**********************/
void Init_DS18B20(void)
{
unsigned char x=0;
DQ = 1; //DQ复位
delay_18B20(8); //稍做延时
DQ = 0; //单片机将DQ拉低
delay_18B20(40); //精确延时 大于 480us
DQ = 1; //拉高总线
delay_18B20(7);
x=DQ; //稍做延时后 如果x=0则初始化成功 x=1则初始化失败
delay_18B20(10);
}
/***********ds18b20读一个字节**************/
uchar ReadOneChar(void)
{
uchar i=0;
uchar dat = 0;
for (i=8;i>0;i--)
{
DQ = 0; // 给脉冲信号
dat>>=1;
DQ = 1; // 给脉冲信号
if(DQ)
dat|=0x80;
delay_18B20(4);
}
return(dat);
}
/*************ds18b20写一个字节****************/
void WriteOneChar(uchar dat)
{
uchar i=0;
for (i=8; i>0; i--)
{
DQ = 0;
DQ = dat&0x01;
delay_18B20(5);
DQ = 1;
dat>>=1;
}
}
/**************读取ds18b20当前温度************/
void ReadTemp(void)
{
uchar a=0;
uchar b=0;
uchar t;
Init_DS18B20();
WriteOneChar(0xCC); // 跳过读序号列号的操作
WriteOneChar(0x44); // 启动温度转换
delay_18B20(100); // this message is wery important
Init_DS18B20();
WriteOneChar(0xCC); //跳过读序号列号的操作
WriteOneChar(0xBE); //读取温度寄存器等（共可读9个寄存器） 前两个就是温度
delay_18B20(50);
a=ReadOneChar(); //读取温度值低位
b=ReadOneChar(); //读取温度值高位
t=b&0xf8;
if(t)
{
TempBuffer[0]=':';
TempBuffer[1]='-';
temp_value=b<<4;
temp_value+=(a&0xf0)>>4;
temp_value=~temp_value+1;
temp1_value=~a&0x0f;
}
else
{
temp_value=b<<4;
temp_value+=(a&0xf0)>>4;
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