基于ds1302万年历应用实例、基于ds18b20温度检测应用实例.doc

基于DS1302万年历以及基于DS18B20的温度检测电路/*主程序*/#include#include LCD1602.h#include 1302.h#includewendu.h#define uchar unsigned char#define uint unsigned intsbit speaker=P24;bit key_flag1=0,key_flag2=0; /*uchar shijian6=0;*/sec_add=0,min_add=0,hou_add=0,day_add=0,mon_add=0,yea_add=0;uchar data_alarm7=0;/*键盘控制*/int key_scan() /扫描是否有键按下 int i=0;uint temp;P1=0xf0;temp=P1;if(temp!=0xf0)i=1;elsei=0;return i; uchar key_value() /确定按键的值uint m=0,n=0,temp;uchar value;uchar code v43=2,1,0,5,4,3,8,7,6,b,a,9; /用二维数组进行按键查询P1=0xfe;temp=P1; if(temp!=0xfe)m=0;P1=0xfd;temp=P1;if(temp!=0xfd)m=1;P1=0xfb;temp=P1;if(temp!=0xfb)m=2;P1=0xf7;temp=P1;if(temp!=0xf7)m=3;P1=0xef;temp=P1;if(temp!=0xef)n=0;P1=0xdf;temp=P1;if(temp!=0xdf)n=1;P1=0xbf;temp=P1;if(temp!=0xbf)n=2;value=vmn;return value; /*设置闹铃函数*/ void naoling(void) uchar i=0,l=0,j; init1602(); while(key_flag2&i12) if(key_scan()j=key_value();write_data(j);if(i%2=0)data_alarml=(j-0)9)data11=0;data10+; if(data109)data10=0;data11=0; x1=(data10-0)9)data14=0;data13+; if(data13=1&data14=3)data13=0;data14=1; x2=(data13-0)9)data17=0;data16+; if(data16=3&data17=2)data16=0;data17=1; x3=(data16-0)9)time1=0;time0+; if(time0=2&time1=4) time0=0;time1=0; x4=(time0-0)9)time4=0;time3+; if(time3=6&time4=1) time3=0;time4=1; x5=(time3-0)9)time7=0;time6+; if(time6=6&time7=1) time6=0;time7=1; x6=(time6-0)4|(time7-0);dswrite(0x80,x6); break; /case b: reset() ;break; default: break; /*中断处理函数*/void changing(void) interrupt 0 using 0 /需要修改时间和日期，或者停止修改if(key_flag1)key_flag1=0;else key_flag1=1;void alarming(void) interrupt 3 using 0/需要设置闹铃或者停止设置 if(key_flag2)key_flag2=0;else key_flag2=1;/*主函数*/ main()uint i;/uchar *l;uchar p1=D:,p2=TM,p3=Wd;EA=1;EX0=1;IT0=1;EA=1;EX1=1;IT1=1;init1602();/LCD初始化Initial_DS1302() ; /1302初始化ds18b20(); baojing=1; /报警灯while(1) /write_com(0x80);/显示区域不够 去除 / write_string(p1,2); write_com(0x88) ; write_string(p3,2) ; write_com(0xc0); write_string(p2,2); gettime();/从1302中读取时间 datalcd( ); /日期显示转换 timelcd( ); /时间显示转换 xiugai( );/调用修改时间函数 if (key_flag2) naoling(); if (according() alarm(); write_com(0x80); write_string(data1,8); write_com(0xc2); write_string(time,8); ds18b20(); /12位转换时间最大为750ms get_temperature(); display( ); delay(10); /*1302子程序：*/#ifndef _REAL_TIMER_DS1302_2009_5_20_#define _REAL_TIMER_DS1302_2003_5_20_#include #define uchar unsigned char#define uint unsigned intvoid timelcd( );void datalcd( );sbit DS1302_CLK = P26; /实时时钟时钟线引脚 sbit DS1302_IO = P27; /实时时钟数据线引脚 sbit DS1302_RST = P25; /实时时钟复位线引脚sbit ACC0 = ACC0;sbit ACC7 = ACC7;uchar x7=0x20,0x10,0x04,0x18,0x10,0x0,0x00;/分别存放年月日，时分秒/uchar x6=0;uchar time7=0;/ 存放时间uchar data17=0;/存放日期void dswrite(unsigned char add,unsigned char dat) unsigned char i ;DS1302_CLK=0;DS1302_RST=0;DS1302_RST=1;for(i=0;i=1;DS1302_CLK=0;_nop_(); ACC=dat;for(i=0;i=1; DS1302_CLK=0;DS1302_RST=0;unsigned char dsread(unsigned char add) unsigned char i,dat;DS1302_CLK=0;DS1302_RST=0;DS1302_RST=1;ACC=add;for(i=0;i=1;DS1302_CLK=0;_nop_(); DS1302_IO=1;/送1呈输入状态dat=0; for(i=0;i= 1;_nop_();DS1302_CLK=0;_nop_();DS1302_CLK=0;DS1302_RST=0;return dat; void gettime()/从1302中读取时间 DS1302_RST=0;x1=dsread(0x8d);/年x2=dsread(0x89);/月x3=dsread(0x87);/日x4=dsread(0x85);/时x5=dsread(0x83);/分x6=dsread(0x81);/秒 void datalcd( ) data10=(x14)+0; data11=(x1&0x0f)+0); data12=-; data13=(x24)&0x0f)+0; data14=(x2&0x0f)+0; data15=-; data16=(x34)&0x0f)+0; data17=(x3&0x0f)+0; void timelcd( ) time0=(x44)&0x0f)+0; time1=(x4&0x0f)+0; time2=:; time3=(x54)&0x0f)+0; time4=(x5&0x0f)+0; time5=:; time6=(x64)&0x0f)+0; time7=(x6&0x0f)+0; void DS1302_SetProtect(bit flag) /是否写保护if(flag)dswrite(0x8E,0x10); elsedswrite(0x8E,0x00);void DS1302_SetTime(unsigned char Address, unsigned char Value) / 设置时间函数DS1302_SetProtect(0);dswrite(Address, (Value/10)4 | (Value%10); /将十进制数转换为BCD码/在DS1302中的与日历、时钟相关的寄存器存放的数据必须为BCD码形式void Initial_DS1302(void) /初始化1302unsigned char Second;Second=dsread(0x80);if(Second&0x80) /初始化时间 DS1302_SetTime(0x80,0);/*ds18b20子程序*/ #include #include /#include cd1602.h#define uchar unsigned char#define uint unsigned int void display( );void delay(uint z);sbit ds=P37;sbit baojing=P36;uchar flag ;uint temp; /参数temp一定要声明为 int 型uchar wendustring6=0; /显示温度用void TempDelay (uchar us) /延时函数 while(us-);void ds_reset(void) /18b20复位 ds=1; _nop_(); /延时1us ds=0; TempDelay(80); /最少480us _nop_(); ds=1; TempDelay(5); /存在检测高电平时间：1560us， 此处大约延时44us _nop_(); _nop_(); _nop_(); if(ds=0) flag=1; /detect 18b20 success else flag=0; /detect 18b20 fail TempDelay(20); /存在检测低电平时间：60240us，此处延时约140us _nop_(); _nop_(); ds=1; /拉高总线，让总线处于空闲状态bit ds_read_bit(void) /读一位 bit dat; ds=0; _nop_(); /读时隙起始总线拉低至少1us ds=1; _nop_(); _nop_(); dat=ds; TempDelay(10); /所有读时间隙必须60120us，此处延时约77us return(dat); uchar ds_read_byte(void ) /读一字节uchar value,i,j;value=0; for(i=0;i8;i+) j=ds_read_bit(); value=(j1); return(value); /返回一个字节的数据void ds_write_byte(uchar dat) /写一个字节 uchar i; bit onebit; for(i=1;i1;if(onebit) /写 1ds=0;_nop_(); _nop_(); ds=1; TempDelay(5); else /写 0ds=0; TempDelay(8); /写0 时间隙，低电平至少60s，此处大约64usds=1;_nop_(); _nop_(); void ds18b20() /初始化 ds_reset(); delay(1); /约2ms ds_write_byte(0xcc); ds_write_byte(0x44);uint get_temperature()/读取温度函数 float wendu; uchar a,b; ds_reset(); delay(1); /约2ms ds_write_byte(0xcc); ds_write_byte(0xbe); a=ds_read_byte(); b=ds_read_byte(); temp=b; temp=2&wendustring35) baojing=0;else if (wendustring2=3)baojing=0;else baojing=1;wendustring4=.;wendustring5=temp%10+0; elsewendustring0=+;wendustring1=temp/1000+0;if(temp750) baojing=0;else baojing=1;wendustring2=temp%1000/100+0; /显示温度用wendustring3=temp%100/10+0;wendustring4=.;wendustring5=temp%10+0; write_com(0x8a); write_string(wendustring,6); delay(5); /*1602液晶显示子程序*/#ifndef LCD_CHAR_1602_2005_