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發布時間: 2018-3-9 21:03
正文摘要:我最近在做用單片機和DS12C887做一個電子鐘，想將電子鐘的間通過串口調試助手傳輸到電腦上，但是傳輸過程中遇到了點問題，如圖： 傳輸的時間是錯誤的，請問這是哪里出錯了？ 我剛學單片機一個月，不太明白，希 ... |
| 開發板是用的郭天祥的TX-1C，單片機顯示的時間正確無誤 |
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程序代碼如下： #include<reg52.h> #include<stdio.h> #define uchar unsigned char #define uint unsigned int sbit dula=P2^6; sbit wela=P2^7; sbit rs=P3^5; sbit lcden=P3^4; sbit s1=P3^0;//功能鍵 sbit s2=P3^1;//增加鍵 sbit s3=P3^2;//減小鍵 sbit s4=P3^6;//鬧鐘查看鍵 sbit rd=P3^7; sbit beep=P2^3;//蜂鳴器 sbit dscs=P1^4; sbit dsas=P1^5; sbit dsrw=P1^6; sbit dsds=P1^7; sbit dsirq=P3^3; unsigned char flag_ser,flag_a,b,c;//串口中斷標志 unsigned char a;//串口中斷中讀取SBUF的值 bit flag1,flag_ri;//定義兩個位變量 uchar count,s1num,flag,t0_num;//其它變量定義 char miao,shi,fen,year,month,day,week,amiao,afen,ashi; uchar code table[]=" 20 - - ";//液晶固定顯示內容 uchar code table1[]=" : : "; void write_ds(uchar,uchar);//寫ds12C887函數 void set_alarm(uchar,uchar,uchar); void read_alarm();//讀取ds12C887鬧鐘值 void delay(uint z);//延時函數 void di();//蜂鳴器報警聲音 void write_com(uchar com);//寫液晶命令函數 void write_date(uchar date);//寫液晶數據函數 void init();//初始化函數 uchar read_ds(uchar);//讀ds12C887函數 void set_time();//設置上電默認時間函數 void write_sfm(uchar add,char date);//寫時分秒數據函數 void write_nyr(uchar add,char date);//寫年月日數據函數 void write_week(char we);//寫液晶星期顯示函數 void keyscan();//鍵盤掃描函數 void main()//主函數 { init();//調用初始化函數 while(1) { keyscan();//按鍵掃描 if(flag_ri==1)//當鬧鐘中斷時進入這里 { di(); delay(100); di(); delay(500); } if(flag==0&&flag1==0)//正常工作時進入這里 { keyscan();//按鍵掃描 year=read_ds(9);//讀取12C887數據 month=read_ds(8); day=read_ds(7); week=read_ds(6); shi=read_ds(4); fen=read_ds(2); miao=read_ds(0); write_sfm(10,miao);//送液晶顯示 write_sfm(7,fen); write_sfm(4,shi); write_week(week); write_nyr(3,year); write_nyr(6,month); write_nyr(9,day); while(flag_ser==1) { flag_ser=0; ES=0; TI=1; switch(flag_a) { case 0:a=shi; printf("THE hour IS %d\n",a); break; case 1:a=fen; printf("THE minute IS %d\n",a); break; case 2:a=miao; printf("THE second IS %d\n",a); break; } while(!TI); TI=0; ES=1; } } } } void delay(uint z) { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } void di() { beep=0; delay(100); beep=1; } void write_com(uchar com) { rs=0; lcden=0; P0=com; delay(3); lcden=1; delay(3); lcden=0; } void write_date(uchar date) { rs=1; lcden=0; P0=date; delay(3); lcden=1; delay(3); lcden=0; } void init() { uchar num; TMOD=0X20;//定時器1工作方式2 TH1=0XFD;//波特率9600時所裝初值 TL1=0XFD; ES=1; // SM0=0; // SM1=1; // REN=1; TR1=1; SCON=0X50; EA=1;//打開總中斷 EX1=1;//開外部中斷1 IT1=1;//設置負跳變沿觸發中斷 flag1=0;//變量初始化 t0_num=0; s1num=0; week=1; dula=0;//關閉數碼管顯示 wela=0; lcden=0; rd=0; /*以下幾行在首次設置DS12C887時使用，以后不必再寫入*/ // write_ds(0x0A,0x20);//打開振蕩器 // write_ds(0x0B,0x26);//設置24小時模式，數據二進制格式 //開啟鬧鈴中斷 // set_time();//設置上電默認時間 //----------------------------------------------------- write_com(0x38);//1602液晶初始化 write_com(0x0c); write_com(0x06); write_com(0x01); write_com(0x80); for(num=0;num<15;num++)//寫入液晶固定部分顯示 { write_date(table[num]); delay(1); } write_com(0x80+0x40); for(num=0;num<11;num++) { write_date(table1[num]); delay(1); } } void write_sfm(uchar add,char date) {//1602液晶刷新時分秒函數4為時，7為分，10為秒 char shi,ge; shi=date/10; ge=date%10; write_com(0x80+0x40+add); write_date(0x30+shi); write_date(0x30+ge); } void write_nyr(uchar add,char date) {//1602液晶刷新年月日函數3為年，6為分，9為秒 char shi,ge; shi=date/10; ge=date%10; write_com(0x80+add); write_date(0x30+shi); write_date(0x30+ge); } void write_week(char we) { write_com(0x80+12); switch(we) { case 1: write_date('M');delay(5); write_date('O');delay(5); write_date('N'); break; case 2: write_date('T');delay(5); write_date('U');delay(5); write_date('E'); break; case 3: write_date('W');delay(5); write_date('E');delay(5); write_date('D'); break; case 4: write_date('T');delay(5); write_date('H');delay(5); write_date('U'); break; case 5: write_date('F');delay(5); write_date('R');delay(5); write_date('I'); break; case 6: write_date('S');delay(5); write_date('A');delay(5); write_date('T'); break; case 7: write_date('S');delay(5); write_date('U');delay(5); write_date('N'); break; } } void keyscan() { if(flag_ri==1) {//這里用來取消鬧鐘報警，任一鍵取消報警 if((s1==0)||(s2==0)||(s3==0)||(s4==0)) { delay(5); if((s1==0)||(s2==0)||(s3==0)||(s4==0)) { while(!(s1&&s2&&s3&&s4)); // di(); flag_ri=0;//清除報警標志 } } } if(s1==0)//檢測S1 { delay(5); if(s1==0) { s1num++;//記錄按下次數 if(flag1==1) if(s1num==4) s1num=1; flag=1; while(!s1);//di(); switch(s1num) {//光標閃爍點定位 case 1: write_com(0x80+0x40+10); write_com(0x0f); break; case 2: write_com(0x80+0x40+7); break; case 3: write_com(0x80+0x40+4); break; case 4: write_com(0x80+12); break; case 5: write_com(0x80+9); break; case 6: write_com(0x80+6); break; case 7: write_com(0x80+3); break; case 8: s1num=0; write_com(0x0c); flag=0; write_ds(0,miao); write_ds(2,fen); write_ds(4,shi); write_ds(6,week); write_ds(7,day); write_ds(8,month); write_ds(9,year); break; } } } if(s1num!=0)//只有當S1按下后，才檢測S2和S3 { if(s2==0) { delay(1); if(s2==0) { while(!s2);//di(); switch(s1num) {//根據功能鍵次數調節相應數值 case 1: miao++; if(miao==60) miao=0; write_sfm(10,miao); write_com(0x80+0x40+10); break; case 2: fen++; if(fen==60) fen=0; write_sfm(7,fen); write_com(0x80+0x40+7); break; case 3: shi++; if(shi==24) shi=0; write_sfm(4,shi); write_com(0x80+0x40+4); break; case 4: week++; if(week==8) week=1; write_week(week); write_com(0x80+12); break; case 5: day++; if(day==32) day=1; write_nyr(9,day); write_com(0x80+9); break; case 6: month++; if(month==13) month=1; write_nyr(6,month); write_com(0x80+6); break; case 7: year++; if(year==100) year=0; write_nyr(3,year); write_com(0x80+3); break; } } } if(s3==0) { delay(1); if(s3==0) { while(!s3);//di(); switch(s1num) {//根據功能鍵次數調節相應數值 case 1: miao--; if(miao==-1) miao=59; write_sfm(10,miao); write_com(0x80+0x40+10); break; case 2: fen--; if(fen==-1) fen=59; write_sfm(7,fen); write_com(0x80+0x40+7); break; case 3: shi--; if(shi==-1) shi=23; write_sfm(4,shi); write_com(0x80+0x40+4); break; case 4: week--; if(week==0) week=7; write_week(week); write_com(0x80+12); break; case 5: day--; if(day==0) day=31; write_nyr(9,day); write_com(0x80+9); break; case 6: month--; if(month==0) month=12; write_nyr(6,month); write_com(0x80+6); break; case 7: year--; if(year==-1) year=99; write_nyr(3,year); write_com(0x80+3); break; } } } } if(s4==0)//檢測S4 { delay(5); if(s4==0) { flag1=~flag1; while(!s4);//di(); if(flag1==0) {//退出鬧鐘設置時保存數值 flag=0; write_com(0x80+0x40); write_date(' '); write_date(' '); write_com(0x0c); write_ds(1,miao); write_ds(3,fen); write_ds(5,shi); } else {//進入鬧鐘設置 read_alarm();//讀取原始數據 miao=amiao;//重新賦值用以按鍵調節 fen=afen; shi=ashi; write_com(0x80+0x40); write_date('N');//顯示鬧鐘標志 write_date('Z'); write_com(0x80+0x40+3); write_sfm(4,ashi);//送液晶顯示鬧鐘時間 write_sfm(7,afen); write_sfm(10,amiao); } } } } void write_ds(uchar add,uchar date) { dscs=0; dsas=1; dsds=1; dsrw=1; P0=add;//先寫地址 dsas=0; dsrw=0; P0=date;//再寫數據 dsrw=1; dsas=1; dscs=1; } uchar read_ds(uchar add) { uchar ds_date; dsas=1; dsds=1; dsrw=1; dscs=0; P0=add;//先寫地址 dsas=0; dsds=0; P0=0xff; ds_date=P0;//再讀數據 dsds=1; dsas=1; dscs=1; return ds_date; } /*---首次操作12C887時給予寄存器初始化---*/ void set_time() { write_ds(0,0); write_ds(1,0); write_ds(2,0); write_ds(3,0); write_ds(4,0); write_ds(5,0); write_ds(6,0); write_ds(7,0); write_ds(8,0); write_ds(9,0); } //---------------------------------------- void read_alarm() { amiao=read_ds(1); afen=read_ds(3); ashi=read_ds(5); } void exter() interrupt 2//外部中斷1服務程序 { uchar c; //進入中斷表示鬧鐘時間到， flag_ri=1; //設置標志位，用以大程序中報警提示 c=read_ds(0x0c);//讀取12C887的C寄存器表示響應了中斷 } void ser() interrupt 4 //串口中斷 { RI=0; a=SBUF; flag_ser=1; if(a==1) flag_a=0; else if(a==2) flag_a=1; else flag_a=2; } |
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