DS3231高精度时钟程序代码(单片机STC89c52RC与1602显示)

-------------精选文档------------------------------精选文档-----------------可编辑可编辑-------------精选文档-----------------可编辑//DS3231，经测试，日期，时间，星期，温度可以用1602显示#include<reg51.h>#include<intrins.h>#defineucharunsignedchar#defineuintunsignedint#defineyh0x80//第一行的初始位置#defineer0x80+0x40//第二行初始位置sbitwr=P1^1;sbitrs=P1^0;sbiten=P2^5;sbitSDA=P3^6;//模拟I2C数据传送位SDAsbitSCL=P3^7;//模拟I2C时钟控制位SCLsbitINT=P3^2;sbitkey1=P1^7;//功能键，修改键sbitkey2=P3^4;//上调键sbitkey3=P3^5;//下调键sbitRESET=P3^3;bitack;//应答标志位#defineDS3231_WriteAddress0xD0//器件写地址#defineDS3231_ReadAddress0xD1//器件读地址#defineDS3231_SECOND0x00//秒#defineDS3231_MINUTE0x01//分#defineDS3231_HOUR0x02//时#defineDS3231_WEEK0x03//星期#defineDS3231_DAY0x04//日#defineDS3231_MONTH0x05//月#defineDS3231_YEAR0x06//年//闹铃1#defineDS3231_SALARM1ECOND0x07//秒#defineDS3231_ALARM1MINUTE0x08//分#defineDS3231_ALARM1HOUR0x09//时#defineDS3231_ALARM1WEEK0x0A//星期/日//闹铃2#defineDS3231_ALARM2MINUTE0x0b//分#defineDS3231_ALARM2HOUR0x0c//时#defineDS3231_ALARM2WEEK0x0d//星期/日#defineDS3231_CONTROL0x0e//控制寄存器#defineDS3231_STATUS0x0f//状态寄存器#defineBSY2//忙#defineOSF7//振荡器停止标志#defineDS3231_XTAL0x10//晶体老化寄存器#defineDS3231_TEMPERATUREH0x11//温度寄存器高字节(8位)#defineDS3231_TEMPERATUREL0x12//温度寄存器低字节(高2位)uchara,miao,shi,fen,ri,yue,nian,week,temp1,temp2,key1n,temp;ucharcodetab1[]={"2017--FRI"};ucharcodetab2[]={"::."};ucharHEX2BCD(ucharval)//B码转换为BCD码{uchark; k=(val)/10*16+(val)%10;returnk;}ucharBCD_Decimal(ucharbcd){ucharDecimal;Decimal=bcd>>4;return(Decimal=Decimal*10+(bcd&=0x0F));}voiddelayus(uintus){while(us--);}voidStart_I2C(){SDA=1;//发送起始条件的数据信号delayus(1);SCL=1;delayus(5);//起始条件建立时间大于4.7us,延时SDA=0;//发送起始信号delayus(5);//起始条件锁定时间大于4μsSCL=0;//钳住I2C总线，准备发送或接收数据delayus(2);}voidStop_I2C(){SDA=0;//发送结束条件的数据信号delayus(1);//发送结束条件的时钟信号SCL=1;//结束条件建立时间大于4usdelayus(5);SDA=1;//发送I2C总线结束信号delayus(4);}voidSendByte(ucharc){ucharBitCnt;for(BitCnt=0;BitCnt<8;BitCnt++)//要传送的数据长度为8位{if((c<<BitCnt)&0x80)SDA=1;//判断发送位elseSDA=0;delayus(1);SCL=1;//置时钟线为高，通知被控器开始接收数据位delayus(5);//保证时钟高电平周期大于4μsSCL=0;}delayus(2);SDA=1;//8位发送完后释放数据线，准备接收应答位delayus(2);SCL=1;delayus(3);if(SDA==1)ack=0;elseack=1;//判断是否接收到应答信号SCL=0;delayus(2);}ucharRcvByte(){ucharretc;ucharBitCnt;retc=0;SDA=1;//置数据线为输入方式for(BitCnt=0;BitCnt<8;BitCnt++){delayus(1);SCL=0;//置时钟线为低，准备接收数据位delayus(5);//时钟低电平周期大于4.7μsSCL=1;//置时钟线为高使数据线上数据有效delayus(3);retc=retc<<1;if(SDA==1)retc=retc+1;//读数据位,接收的数据位放入retc中delayus(2);}SCL=0;delayus(2);return(retc);}voidAck_I2C(bita){if(a==0)SDA=0;//在此发出应答或非应答信号elseSDA=1;delayus(3);SCL=1;delayus(5);//时钟低电平周期大于4μsSCL=0;//清时钟线，钳住I2C总线以便继续接收delayus(2);}ucharwrite_byte(ucharaddr,ucharwrite_data){Start_I2C();SendByte(DS3231_WriteAddress);if(ack==0)return0;SendByte(addr);if(ack==0)return0;SendByte(write_data);if(ack==0)return0;Stop_I2C();delayus(10);return1;}ucharread_current(){ucharread_data;Start_I2C();SendByte(DS3231_ReadAddress);if(ack==0)return(0);read_data=RcvByte();Ack_I2C(1);Stop_I2C();returnread_data;}ucharread_random(ucharrandom_addr){Start_I2C();SendByte(DS3231_WriteAddress);if(ack==0)return(0);SendByte(random_addr);if(ack==0)return(0);return(read_current());}voidModifyTime(ucharyea,ucharmon,ucharda,ucharhou,ucharmin,ucharsec,ucharweek){uchartemp=0;temp=HEX2BCD(yea);write_byte(DS3231_YEAR,temp);//修改年temp=HEX2BCD(mon);write_byte(DS3231_MONTH,temp);//修改月temp=HEX2BCD(da);write_byte(DS3231_DAY,temp);//修改日temp=HEX2BCD(hou);write_byte(DS3231_HOUR,temp);//修改时temp=HEX2BCD(min);write_byte(DS3231_MINUTE,temp);//修改分temp=HEX2BCD(sec);write_byte(DS3231_SECOND,temp);//修改秒 temp=HEX2BCD(week);write_byte(DS3231_WEEK,temp);//修改星期}/******************液晶写入************************/write_1602com(ucharcom)//液晶写入指令函数{ rs=0;//置为写入命令 P0=com;//送入数据 delayus(1000); en=1;//拉高使能端 delayus(1000); en=0;//完成高脉冲}write_1602dat(uchardat){ rs=1;//置为写入数据 P0=dat;//送入数据 delayus(1000); en=1; delayus(1000); en=0;}/*********************over***********************/lcd_init()//液晶初始化函数{wr=0; write_1602com(0x38);//设置液晶工作模式 write_1602com(0x0c);//开显示不显示光标 write_1602com(0x06);//整屏不移动，指针加一 write_1602com(0x01); write_1602com(yh+1);//字符写入的位置 for(a=0;a<14;a++) { write_1602dat(tab1[a]); //delay(3); } write_1602com(er); for(a=0;a<12;a++) { write_1602dat(tab2[a]); //delay(3); } write_1602com(er+14);//写温度符号 write_1602dat(0xdf); write_1602dat(0x43);}voidwrite_sfm(ucharadd,uchardat)//写时分秒及温度{ uchargw,sw; gw=dat%10; sw=dat/10; write_1602com(er+add); write_1602dat(0x30+sw); write_1602dat(0x30+gw); }voidwrite_nyr(ucharadd,uchardat)//写日期{ uchargw,sw; gw=dat%10; sw=dat/10; write_1602com(yh+add); write_1602dat(0x30+sw); write_1602dat(0x30+gw); } voidwrite_week(ucharweek)//写星期函数{ write_1602com(yh+0x0c); switch(week) { case1:write_1602dat('M');//delay(5); write_1602dat('O');//delay(5); write_1602dat('N'); break; case2:write_1602dat('T');//delay(5); write_1602dat('U');//delay(5); write_1602dat('E'); break; case3:write_1602dat('W');//delay(5); write_1602dat('E');//delay(5); write_1602dat('D'); break; case4:write_1602dat('T');//delay(5); write_1602dat('H');//delay(5); write_1602dat('U'); break; case5:write_1602dat('F');//delay(5); write_1602dat('R');//delay(5); write_1602dat('I'); break; case6:write_1602dat('S');//delay(5); write_1602dat('T');//delay(5); write_1602dat('A'); break; case7:write_1602dat('S');//delay(5); write_1602dat('U');//delay(5); write_1602dat('N'); break;}}voidkeyscan(){ if(key1==0)//key1为功能键 { delayus(5000); if(key1==0) { while(!key1); key1n++; if(key1n==9) key1n=1; switch(key1n) { case1:TR0=0;//关闭定时器 //TR1=0; write_1602com(er+0x06);//写入光标位置 write_1602com(0x0f);//设置光标为闪烁 break; case2:write_1602com(er+3);//fen //write_1602com(0x0f); break; case3:write_1602com(er+0);//shi //write_1602com(0x0f); break; case4:write_1602com(yh+0x0d);//week //write_1602com(0x0f); break; case5:write_1602com(yh+0x09);//ri //write_1602com(0x0f); break; case6:write_1602com(yh+0x06);//yue //write_1602com(0x0f); break; case7:write_1602com(yh+0x03);//nian //write_1602com(0x0f); break; case8:write_1602com(0x0c);//设置光标不闪烁 write_sfm(6,miao);//写入新的秒数 temp=(miao)/10*16+(miao)%10; write_byte(DS3231_SECOND,temp);//退出时修改秒 write_1602com(er+6); write_sfm(0x03,fen); temp=(fen)/10*16+(fen)%10; write_byte(DS3231_MINUTE,temp);//修改分 write_1602com(er+3); TR0=1;//打开定时器break; } } } if(key1n!=0)//当key1按下以下。再按以下键才有效 { if(key2==0)//上调键 { delayus(5000); if(key2==0) { while(!key2); switch(key1n) { case1:miao++; if(miao==60) miao=0; write_sfm(6,miao);//写入新的秒数 temp=(miao)/10*16+(miao)%10; write_byte(DS3231_SECOND,temp);//修改秒 write_1602com(er+6);//设置液晶的模式是写入数据后，指针自动加一，在这里是写回原来的位置 break; case2:fen++; if(fen==60) fen=0; write_sfm(0x03,fen); temp=(fen)/10*16+(fen)%10; write_byte(DS3231_MINUTE,temp); write_1602com(er+3); break; case3:shi++; if(shi==24) shi=0; write_sfm(0,shi); temp=(shi)/10*16+(shi)%10; write_byte(DS3231_HOUR,temp); write_1602com(er+0); break; case4:week++; if(week==8) week=0; write_week(week); write_byte(DS3231_WEEK,week);//修改星期 write_1602com(yh+0x0d); break; case5:ri++; if(ri==31) ri=0; write_nyr(9,ri); temp=(ri)/10*16+(ri)%10; write_byte(DS3231_DAY,temp);//修改日 write_1602com(yh+9); break; case6:yue++; if(yue==13) yue=0; write_nyr(6,yue); temp=(yue)/10*16+(yue)%10; write_byte(DS3231_MONTH,temp);//修改月 write_1602com(yh+6); break; case7:nian++; if(nian==100) nian=0; write_nyr(3,nian); temp=(nian)/10*16+(nian)%10; write_byte(DS3231_YEAR,temp);//修改年 write_1602com(yh+3); break; } } } if(key3==0) { delayus(5000); if(key3==0) { while(!key3); switch(key1n) { case1:miao--; if(miao==-1) miao=59; write_sfm(6,miao);//写入新的秒数 temp=(miao)/10*16+(miao)%10; write_byte(DS3231_SECOND,temp);//修改秒 write_1602com(er+6);//因为设置液晶的模式是写入数据后，指针自动加一，在这里是写回原来的位置 break; case2:fen--; if(fen==-1) fen=59; write_sfm(3,fen); temp=(fen)/10*16+(fen)%10; write_byte(DS3231_MINUTE,temp);//修改分 write_1602com(er+3); break; case3:shi--; if(shi==-1) shi=23; write_sfm(0,shi); temp=(shi)/10*16+(shi)%10; write_byte(DS3231_HOUR,temp);//修改时 write_1602com(er+0); break; case4:week--; if(week==-1) week=7; write_week(week); write_byte(DS3231_WEEK,week);//修改星期 write_1602com(yh+0x0d); break; case5:ri--; if(ri==-1) ri=30; write_nyr(9,ri); temp=(ri)/10*16+(ri)%10; write_byte(DS3231_DAY,temp);//修改日 write_1602com(yh+9); break; case6:yue--; if(yue==-1) yue=12; write_nyr(6,yue); temp=(yue)/10*16+(yue)%10; write_byte(DS3231_MONTH,temp);//修改月 write_1602com(yh+6); break; case7:nian--; if(nian==-1) nian=99; write_nyr(3,nian); temp=(nian)/10*16+(nian)%10; write_byte(DS3231_YEAR,temp);//修改年 write_1602com(yh+3); break; } } } }}voidmain(){uintii=0;lcd_init();