51单片机操作DS1302时钟芯片

#defineuintunsignedint#defineucharunsignedcharsbitlcdrs=P1^0;sbitlcdrw=P1^1;sbitlcden=P1^2;sbitkey0=P2^0;//功能键,选择时分秒sbitkey1=P2^1;//加1键sbitkey2=P2^2;//减1键sbitkey4=P2^4;sbitclk_1302=P1^5;//1302芯片位定义sbitio_1302=P1^6;sbitrst_1302=P1^7;ucharbdatadat;sbitdat0=dat^0;sbitdat7=dat^7;ucharkey0_count;//按键0被按的次数(0~3)ucharflag;charhour,minute,second;uchartable_date[]="2009-4-12Mon";uchartable_time[]="00:00:00";/******函数申明********/voidwrite_cmd_1602(ucharcmd);voidwrite_data_1602(uchardat);voidwrite_add(ucharadd,uchardat);voidinit1602();voiddelay(uintz);ucharreverse(ucharc);voidkeyscan();voidinit();voidRTC_initial();voidwr_1302(ucharwr_data);ucharrd_1302(void);ucharuc_R1302(ucharucAddr);voidv_W1302(ucharucAddr,ucharucDa);

主程序

#include#include#include"header.h"/******主函数********/voidmain(){RTC_initial();init();//init1602();//while(1);while(1){if(flag){second=uc_R1302(0x81);minute=uc_R1302(0x83);hour=uc_R1302(0x85);write_add(0x40+10,second);write_add(0x40+7,minute);write_add(0x40+4,hour);}keyscan();delay(1);}}voidRTC_initial(){v_W1302(0x8e,0x00);//使能v_W1302(0x80,0x80);//停止晶振v_W1302(0x90,0x00);//关闭充电v_W1302(0x8c,0x07);//设置年v_W1302(0x8a,0x06);//设置周v_W1302(0x88,0x01);//设置月v_W1302(0x86,0x13);//设置日v_W1302(0x84,0x18);//设置小时v_W1302(0x82,0x05);//设置分v_W1302(0x80,0x00);//启动晶振,设置秒v_W1302(0x8e,0x80);//使能}/******************************功能:往DS1302写入1Byte数据*输入:wr_data写入的数据*返回值:无*******************************/voidwr_1302(ucharwr_data){uchari=0;dat=wr_data;rst_1302=1;clk_1302=0;delay(5);for(i=0;i<8;i++){io_1302=dat0;clk_1302=0;_nop_();clk_1302=1;_nop_();dat>>=1;}//rst_1302=0;}/******************************功能:从DS1302读出1Byte数据*返回值:dat*******************************/ucharrd_1302(void){uchari;rst_1302=1;clk_1302=1;delay(5);for(i=0;i<8;i++){dat>>=1;dat7=io_1302;clk_1302=1;_nop_();_nop_();clk_1302=0;_nop_();}rst_1302=0;returndat;}/*********************************************************************名称:uc_R1302*说明:先写地址，后读命令/数据*功能:读取DS1302某地址的数据*调用:v_RTInputByte(),uc_RTOutputByte()*输入:ucAddr:DS1302地址*返回值:ucDa:读取的数据***********************************************************************/ucharuc_R1302(ucharadd){uchartemp=0xff;wr_1302(add);temp=rd_1302();returntemp;}/*********************************************************************名称:v_W1302*说明:先写地址，后写命令/数据*功能:往DS1302写入数据*调用:v_RTInputByte()*输入:ucAddr:DS1302地址,ucDa:要写的数据*返回值:无**********************************************************************/voidv_W1302(ucharucAddr,ucharucDa){wr_1302(ucAddr);wr_1302(ucDa);rst_1302=0;clk_1302=0;}//1602液晶初始化voidinit1602(){lcdrw=0;//本程序只读不写,故将其置低lcden=0;//关闭1602delay(5);write_cmd_1602(0x01);//清屏write_cmd_1602(0x38);//显示模式write_cmd_1602(0x0c);//开显示,不显示光标,不闪烁write_cmd_1602(0x06);//地址指针自动加1write_cmd_1602(0x80+1);//将光标指向第一行第二个位置delay(5);}voiddelay(uintz){uintx,y;for(x=z;x>0;x--)for(y=110;y>0;y--);}/**将发送的数据进行翻转,高位到低位,低位转到高位**/ucharreverse(ucharc){ucharchbuff=0;if(c&0x01)chbuff=chbuff|0x80;if(c&0x02)chbuff=chbuff|0x40;if(c&0x04)chbuff=chbuff|0x20;if(c&0x08)chbuff=chbuff|0x10;if(c&0x10)chbuff=chbuff|0x08;if(c&0x20)chbuff=chbuff|0x04;if(c&0x40)chbuff=chbuff|0x02;if(c&0x80)chbuff=chbuff|0x01;returnchbuff;}//向液晶写命令voidwrite_cmd_1602(ucharcmd){lcdrs=0;//低表示写命令,高表示写数据delay(5);P0=reverse(cmd);delay(5);lcden=1;//给一个高脉冲delay(5);lcden=0;delay(5);}//向液晶写数据voidwrite_data_1602(uchardat){lcdrs=1;//低表示写命令,高表示写数据delay(5);P0=reverse(dat);delay(5);lcden=1;//给一个高脉冲delay(5);lcden=0;delay(5);}//根据地址向液晶写数据voidwrite_add(ucharadd,uchardat){ucharshi,ge;shi=dat/10;ge=dat%10;delay(5);write_cmd_1602(0x80+add);write_data_1602(shi+0x30);delay(5);write_data_1602(ge+0x30);}//键盘扫描函数voidkeyscan(){key4=0;if(0==key0)//第一个键被按下{delay(5);//消抖if(0==key0){key0_count++;if(4==key0_count){key0_count=0;flag=1;}while(!key0);//松手检测flag=0;if(0==key0_count){flag=0;write_cmd_1602(0x0c);//禁止显示光标并不让其闪烁}if(1==key0_count){flag=0;write_cmd_1602(0x80+0x40+11);//将地址指针指向秒的位置write_cmd_1602(0x0f);//显示光标并闪烁delay(5);}if(2==key0_count){flag=0;write_cmd_1602(0x80+0x40+8);//将地址指针指向分的位置write_cmd_1602(0x0f);//显示光标并闪烁delay(5);}if(3==key0_count){flag=0;write_cmd_1602(0x80+0x40+5);//将地址指针指向小时的位置write_cmd_1602(0x0f);//显示光标并闪烁delay(5);}}}if(0==key1)//第二个键被按下{delay(5);//消抖if(0==key1){while(!key1);//松手检测flag=0;if(key0_count==1){second++;if(60==second)second=0;write_add(0x40+10,second);v_W1302(0x80,second);}if(key0_count==2){minute++;if(60==minute)minute=0;write_add(0x40+7,minute);v_W1302(0x82,minute);}if(key0_count==3){hour++;if(24==hour)hour=0;write_add(0x40+4,hour);v_W1302(0x84,hour);}}}if(0==key2)//第三个键被按下{delay(5);//消抖if(0==key2){while(!key2);//松手检测flag=0;if(key0_count==1){second--;if(-1==second)second=59;write_add(0x40+10,second);v_W1302(0x80,second);}if(key0_count==2){minute--;if(-1==minute)minute=59;write_add(0x40+7,minute);v_W1302(0x82,minute);}if(key0_count==3){hour--;if(-1==hour)hour=23;write_add(0x40+4,hour);v_W1302(0x84,hour);}}}}//程序初始化函数voidinit(){uchari;flag=1;hour=0;minute=0;second=0;init1602();delay(20);//延长时间,确保液晶处于非忙状态for(i=0;i<14;i++){write_data_1602(table_date[i]);delay(5);}write_cmd_1602(0x80+0x40+4);//调整地址指针for(i=0;i<8;i++){write_data_1602(table_time[i]);delay(5);}delay(50);v_W1302(0x81,25);v_W1302(0x83,48);v_W1302(0x85,10);}