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51单片机c语言电子钟（已加入调时、闹铃、整点报时功能）效果图：程序如下：//51单片机c语言电子钟（已加入调时、闹铃、整点报时功能）#include<reg51.h>#include<absacc.h>#define uchar unsigned char#define uint unsigned int/*七段共阴管显示定义*///此表为LED 的字模,共阴数码管0-9 -uchar code dispcode[] ={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}; //段码控制/*定义并初始化变量*/uchar seconde=0;//秒uchar minite=0;//分uchar hour=12; //时uchar shi=0;//闹铃功能uchar fen=0;uchar bjcs;//报警次数sbit P1_0=P1^0; //second 调整定义sbit P1_1=P1^1; //minite调整定义sbit P1_2=P1^2; //hour调整定义sbit P1_5=P1^5; //整点报时sbit P1_3=P1^3; //闹铃功能，调整时间sbit P1_6=P1^6; //调整时sbit P1_7=P1^7; //调整分sbit P1_4=P1^4; //关闭闹铃/*函数声明*/void delay(uint k ); //延时子程序void time_pro( ); //时间处理子程序void display( ); //显示子程序void keyscan( ); //键盘扫描子程序/*xx子程序*/void delay (uint k){uchar j;while((k--)!=0){for(j=0;j<125;j++){;}}}/*时间处理子程序*/void time_pro(void){if(seconde==60){seconde=0;minite++;if(minite==60){minite=0;hour++;if(hour==24){hour=0;}}}}/*显示子程序*/void display(void){if(P1_3==1){P2=0XFE; P0=dispcode[seconde%10];//秒个位delay(1);P2=0XFD;P0=dispcode[seconde/10];//秒十位delay(1);P2=0XFB;P0=dispcode[10];//间隔符-delay(1);P2=0XF7;P0=dispcode[minite%10];//分个位delay(1);P2=0XEF;P0=dispcode[minite/10];//分十位delay(1);P2=0XDF;P0=dispcode[10];//间隔符-delay(1);P2=0XBF;P0=dispcode[hour%10];//时个位delay(1);P2=0X7F;P0=dispcode[hour/10];//时十位delay(1);}}/*键盘扫描子程序*/void keyscan(void){if(P1_0==0)//秒位的调整{delay (30);if(P1_0==0){seconde++;if(seconde==60){seconde=0;}}delay(250);}if(P1_1==0)//分位的调整{delay(30);if(P1_1==0){minite++;if(minite==60){minite=0;}}delay(250);}if(P1_2==0)//时位的调整{delay(30);if(P1_2==0){hour++;if(hour==24){hour=0;}}delay(250);}}/*整点报警*/void zhengdian (void){if((seconde==0)&(minite==0))//整点报时{P1_5=0;delay(1000);P1_5=1;}}/*定时闹钟*/void dingshi(void){if(P1_3==0)//按住P1_3BU不松，显示闹铃设置界面，分别按P1_6、P1_7设置闹铃时间。
时钟计时器设计目录一、功能要求 (3)二、方案论证 (3)三、系统硬件电路设计 (3)四、系统程序设计 (4)1.主程序 (4)2.显示子程序 (5)3.定时器T0中断服务程序 (5)4.定时器T1中断服务程序 (6)5.调时功能程序 (6)6.整点响程序 (6)7.时钟/秒表功能程序 (6)8.闹钟时间设定功能程序 (6)五、调试及性能分析 (6)1、硬件测试 (6)2、软件测试……………………………………………………………………6.3、性能分析 (6)六．控制源程序清单……………………………………………………………….7.1.汇编源程序清单 (7)2. C源程序清单 (23)3.实物照片 (26)4.元器件清单 (27)七．Proteus仿真 (28)八．设计制作要点 (28)九．实训心得 (29)参考文献 (31)时钟计时器的设计一、功能要求：时钟计时器用单片机和6位LED数码管显示时、分、秒，以24小时计时方式运行。
能整点提醒，使用按键开关可实现时、分调整，秒表/时钟功能的转换，闹钟等功能。
二、方案论证：为了实现LED显示器的数字显示，可采用静态显示和动态显示，由于静态显示法需要数据锁存器等硬件，接口较复杂，又考虑到时钟显示只有6位，且系统没有其他复杂的处理任务，所以决定采用动态扫描法实现LED的显示。
单片机采用STC59C52单片机，这种单片机具有足够的空余硬件资源，可以实现其他的扩充任务。
时钟计时器电路系统的总体设计框图如下。
硬件系统总体设计框图三、系统硬件电路的设计：该电路采用STC89C52单片机最小化应用设计，采用共阳8段LED显示，P0口输出段码数据，P2.0~P2.5作为列扫描输出，P1.0~P1.3接4个按键开关，用于调时及功能设置，P1.7口接5V蜂鸣器，用于按键发音和定时提醒、整点报时提醒。
为了提供共阳LED数码管的列扫描驱动电压，用三极管9012作电源驱动输出，采用12MHz晶振，提高秒计时的精准度。
用C语言写的一个PIC16F877的时闹钟程序单片机用16F877，主时钟用20MHz，用32768作定时时间。
可以实现2路定闹，每一路都可分别设置和开关，采用4x4键盘，16x2的字符型LCD显示。
连线在程序开头有说明。
程序的功能：（1）上电后LCD背光打开，并显示倒计时5秒，然后时钟开始工作。
（2）用模式键（*）切换模式，如显示时间、日期、闹钟1、闹钟2等，并且可以用上、下键控制加1、减1或是闹钟的On、Off。
（3）原程序有16个键，包括0~9数字键，可以直接输入要设置的时间值，但后来将数字键取消了，你仍然可以通过修改程序的部分注释恢复此功能。
（4）闹钟有2路，时间到后闹2分钟，可按任意键取消本次闹钟。
闹钟响时有2种音调，是用PIC的PWM实现的。
（5）按任意键可打开背光，1分钟后自动关闭背光。
（6）RA0~RA3为按键扫描输入，应接下拉电阻。
主程序// FileName: Main.c// MCU: Microchip PIC16F877// Tool: CCS-C compiler// Author: KingEDA, MSN:kingeda@, skype:kingeda, E-mail:kingeda@// Website: // Description:// A timer program// Ver 0.1: 2003-03-31, all clock function with date display, 2 way alarm.// Ver 0.2: 2003-05-05, (1) Alarm default is on,modify alarm1 time to 7:00:00,// and alarm2 to 13:30:00.// (2) Backlight will be enabled when alarming.// (3) Automatic adjust day(28,30,31).// (4) Automatic move cursor to next location when set item.// PIN Connection:// RC0~1 : 32768Hz crystal// RC2 : Buzzer// RC3 : LCD Back Light,drive a PNP BJT// RD0~RD7 : to LCD DB0~DB7// RA0~RA3 : keypad col in// RC4~RC7 : keypad line out// 7 8 9 #// 4 5 6 ↑// 1 2 3 ↓// 0 ←→*// RE0 : LCD RS// RE1 : LCD RW// RE2 : LCD E#include "my16f877.h"#device ICD=true//#fuses HS,NOWDT,NOPROTECT,PUT,BROWNOUT #use delay(clock = 24000000)//#use fast_io(C)#use fast_io(E)#define lcd_busy (lcd_read_addr()&0x80) == 0x80#define time_start_addr 0x80+0x04#define time_hourh_addr time_start_addr#define time_hourl_addr time_start_addr+1#define time_minuteh_addr time_start_addr+3#define time_minutel_addr time_start_addr+4#define time_secondh_addr time_start_addr+6#define time_secondl_addr time_start_addr+7#define key_0 0x11#define key_1 0x21#define key_2 0x22#define key_3 0x24#define key_4 0x41#define key_5 0x42#define key_6 0x44#define key_7 0x81#define key_8 0x82#define key_9 0x84#define key_left 0x12#define key_right 0x14#define key_up 0x48#define key_down 0x28#define key_mode 0x18#define key_cancel 0x88char StrPower1[] = " * Power on * ";char StrSetTime[] = " * Adjust time* ";char StrSetDate[] = " * Adjust date* ";char StrAlarm1[] = " * Set alarm 1* ";char StrAlarm2[] = " * Set alarm 2* ";unsigned char PORTC_MAP;#bit BackLightEn = PORTC_MAP.3unsigned char BackLightTimer;int1 led;#bit lcd_rs = PORTE.0#bit lcd_rw = PORTE.1#bit lcd_e = PORTE.2#byte lcd_bus = PORTD#byte lcd_dir = TRISD#define PWM_on 0x0c#define PWM_off 0x00#define PWM_period 200#define PWM_DC 100unsigned char lcd_addr;unsigned char KeyLine;unsigned char KeyOld;unsigned char KeyNew;struct mTime {unsigned char hourh; // hour,0~23unsigned char hourl;unsigned char minuteh; // minute,0~59unsigned char minutel;unsigned char secondh; // second,0~59unsigned char secondl;};struct mTime CurrentTime = {1,2,0,0,0,0};struct mTime AlarmTime1 = {0,7,0,0,0,0}; // 07:00:00 struct mTime AlarmTime2 = {1,3,3,0,0,0}; // 13:30:00 unsigned char AlarmStatus;#bit Alarm1Enable = AlarmStatus.0#bit Alarm2Enable = AlarmStatus.1#bit Alarm1Alarm = AlarmStatus.2#bit Alarm2Alarm = AlarmStatus.3unsigned char Alarm1Cnt; // alarm1 second count unsigned char Alarm2Cnt;unsigned char CurrentMode;#define mode_time 0#define mode_set_time 1#define mode_set_date 2#define mode_set_alarm1 3#define mode_set_alarm2 4unsigned char adjust_item;struct mDate {unsigned char year1; //unsigned char year2;unsigned char year3;unsigned char year4;unsigned char monthh;unsigned char monthl;unsigned char dayh;unsigned char dayl;};struct mDate CurrentDate = {2,0,0,3,0,1,0,1}; unsigned char *pStr;// ------------------------------------------------------- unsigned char lcd_read_addr(){unsigned char ch;lcd_dir = 0xff; // read from lcdlcd_rs = 0;lcd_rw = 1; // instlcd_e = 1;#asmnopnopnop#endasmch = lcd_bus;lcd_e = 0;lcd_dir = 0x00; // set write to lcdreturn ch;}// ------------------------------------------------------- unsigned char lcd_write_data(unsigned char ch) {while (lcd_busy){ restart_wdt(); }lcd_rs = 1; // datalcd_rw = 0; // writelcd_bus = ch; // write outlcd_e = 1;#asmnopnopnop#endasmlcd_e = 0;return 'Y';}// ------------------------------------------------------- unsigned char lcd_write_inst(unsigned char ch) {while (lcd_busy){ restart_wdt(); }lcd_rs = 0; // instlcd_rw = 0; // writelcd_bus = ch;lcd_e = 1;#asmnopnopnop#endasmlcd_e = 0;return 'Y';}// ------------------------------------------------------- unsigned char lcd_read_data(){unsigned char ch;while (lcd_busy){ restart_wdt(); }lcd_dir = 0xff; // read from lcdlcd_rs = 1; // datalcd_rw = 1; // readlcd_e = 1;#asmnopnopnop#endasmch = lcd_bus; // read inlcd_e = 0;lcd_dir = 0x00; // set write to lcdreturn ch;}// ------------------------------------------------------- void lcd_init(){unsigned char Tempch;lcd_addr = 0;delay_ms(100);Tempch = 0x38; // 1-line mode,5x8 dotslcd_write_inst(Tempch); // Function setTempch = 0x0f; // lcd on,cursor on,blink onlcd_write_inst(Tempch); // Display on/offTempch = 0x06; // Increment mode,Entire shift offlcd_write_inst(Tempch);Tempch = 0x01; // clear displaylcd_write_inst(Tempch);delay_ms(3);}// -------------------------------------------------------//#int_timer1//void timer1_interrupt(void)#int_ccp2void ccp2_interrupt(void){//TMR1H = 0x80;if (CurrentTime.secondl==9){CurrentTime.secondl=0;if (CurrentTime.secondh==5){CurrentTime.secondh=0;if (CurrentTime.minutel==9){CurrentTime.minutel=0;if (CurrentTime.minuteh==5){CurrentTime.minuteh=0;if (CurrentTime.hourl==9){CurrentTime.hourl=0;CurrentTime.hourh++;}else if((CurrentTime.hourl==3) && (CurrentTime.hourh==2)){CurrentTime.hourl=0;CurrentTime.hourh=0;if ((((CurrentDate.dayl == 8) || (CurrentDate.dayl == 9)) && (CurrentDate.dayh == 2) && (CurrentDate.monthl == 2) && (CurrentDate.monthh == 0)) ||((CurrentDate.dayl == 0) && (CurrentDate.dayh == 3) && ((((CurrentDate.monthl == 4) || (CurrentDate.monthl == 6)|| (CurrentDate.monthl == 9)) && (CurrentDate.monthh == 0)) || ((CurrentDate.monthl == 1) && (CurrentDate.monthh == 1)))) ||((CurrentDate.dayl == 1) && (CurrentDate.dayh == 3))){CurrentDate.dayl=1;CurrentDate.dayh=0;if ((CurrentDate.monthl == 2) && (CurrentDate.monthh == 1)){CurrentDate.monthl = 1;CurrentDate.monthh = 0;if (CurrentDate.year4 == 9){CurrentDate.year4 = 0;if (CurrentDate.year3 == 9){CurrentDate.year3 = 0;if (CurrentDate.year2 == 9){CurrentDate.year2 = 0;CurrentDate.year1++;}elseCurrentDate.year2++;}elseCurrentDate.year3++;}elseCurrentDate.year4++;}else if(CurrentDate.monthl == 9){CurrentDate.monthl = 0;CurrentDate.monthh++;}elseCurrentDate.monthl++;}else if(CurrentDate.dayl == 9){CurrentDate.dayl=0;CurrentDate.dayh++;}elseCurrentDate.dayl++;}elseCurrentTime.hourl++;}elseCurrentTime.minuteh++;}elseCurrentTime.minutel++;}elseCurrentTime.secondh++;}elseCurrentTime.secondl++;if ((Alarm1Alarm == false) & (Alarm2Alarm == false)){led = 0;CCP1CON = PWM_off;}else{if (led == 1){led = 0;PR2 = PWM_period; // set pwm periodCCPR1L = PWM_DC; // set pwm duty cycle//CCP1CON = PWM_on;}else{led = 1;PR2 = PWM_period/2; // set pwm periodCCPR1L = PWM_DC/2; // set pwm duty cycle//CCP1CON = PWM_off;}}Alarm1Cnt++;Alarm2Cnt++;if (BackLightEn == 0)if (((BackLightTimer++)>=60) & (Alarm1Alarm == false) & (Alarm1Alarm == false))BackLightEn = 1; // disable backlight PORTC = PORTC_MAP;//TMR1IF = 0;//PIR1 = PIR2 = 0x00;CCP2IF = 0;}// ------------------------------------------------------- unsigned char get_key(void){unsigned char key_in,tmp;TRISC = 0x03;KeyLine = 0xf0;PORTC = KeyLine | PORTC_MAP;#asmnopnopnop#endasmif ((PORTA & 0x0f) != 0){tmp = 0x10;for (KeyLine = tmp;KeyLine!=0;KeyLine = tmp){PORTC = KeyLine | PORTC_MAP;tmp = KeyLine <<1;#asmnopnopnop#endasmkey_in = PORTA & 0x0f;if (key_in != 0){return (key_in | KeyLine);}}return 0;}elsereturn 0;}// -------------------------------------------------------void set_mode(void){if (CurrentMode == mode_set_alarm2)CurrentMode = mode_time;else{CurrentMode++;adjust_item = 0;}lcd_write_inst(0x01); // clear LCD displaylcd_write_inst(time_start_addr); // set LCD line1 if (CurrentMode == mode_set_time){lcd_write_data(CurrentTime.hourh + '0');lcd_write_data(CurrentTime.hourl + '0');lcd_write_data(':');lcd_write_data(CurrentTime.minuteh + '0');lcd_write_data(CurrentTime.minutel + '0');lcd_write_data(':');lcd_write_data(CurrentTime.secondh + '0');lcd_write_data(CurrentTime.secondl + '0');pStr = StrSetTime;}else if(CurrentMode == mode_set_date){lcd_write_data(CurrentDate.year1 + '0');lcd_write_data(CurrentDate.year2 + '0');lcd_write_data(CurrentDate.year3 + '0');lcd_write_data(CurrentDate.year4 + '0');lcd_write_data('/');lcd_write_data(CurrentDate.monthh + '0');lcd_write_data(CurrentDate.monthl + '0');lcd_write_data('/');lcd_write_data(CurrentDate.dayh + '0');lcd_write_data(CurrentDate.dayl + '0');pStr = StrSetDate;}else if(CurrentMode == mode_set_alarm1){lcd_write_data(AlarmTime1.hourh + '0');lcd_write_data(AlarmTime1.hourl + '0');lcd_write_data(':');lcd_write_data(AlarmTime1.minuteh + '0');lcd_write_data(AlarmTime1.minutel + '0');lcd_write_data(':');lcd_write_data(AlarmTime1.secondh + '0');lcd_write_data(AlarmTime1.secondl + '0');lcd_write_data(' ');lcd_write_data('O');if (Alarm1Enable){lcd_write_data('n');}else{lcd_write_data('f');lcd_write_data('f');}pStr = StrAlarm1;Alarm1Cnt =0;}else if(CurrentMode == mode_set_alarm2) {lcd_write_data(AlarmTime2.hourh + '0');lcd_write_data(AlarmTime2.hourl + '0');lcd_write_data(':');lcd_write_data(AlarmTime2.minuteh + '0');lcd_write_data(AlarmTime2.minutel + '0');lcd_write_data(':');lcd_write_data(AlarmTime2.secondh + '0');lcd_write_data(AlarmTime2.secondl + '0');lcd_write_data(' ');lcd_write_data('O');if (Alarm2Enable){lcd_write_data('n');}else{lcd_write_data('f');lcd_write_data('f');}pStr = StrAlarm2;Alarm2Cnt = 0;}lcd_write_inst(0xc0); // set LCD line2 if (CurrentMode != mode_time){for (;*pStr!=0;pStr++){ // write hint messagelcd_write_data(*pStr);}lcd_write_inst(0x0f); // LCD cursor onlcd_write_inst(time_start_addr); // move cursor to start }else // time mode,write date to second line{lcd_write_inst(0x0c); // LCD sursor off/* lcd_write_inst(0xc0 + 3); // set date start address lcd_write_data(CurrentDate.year1 + '0');lcd_write_data(CurrentDate.year2 + '0');lcd_write_data(CurrentDate.year3 + '0');lcd_write_data(CurrentDate.year4 + '0');lcd_write_data('/');lcd_write_data(CurrentDate.monthh + '0');lcd_write_data(CurrentDate.monthl + '0');lcd_write_data('/');lcd_write_data(CurrentDate.dayh + '0');lcd_write_data(CurrentDate.dayl + '0');*/ }if (CurrentMode == mode_set_time){lcd_write_inst(time_start_addr); // move cursor to start }else if (CurrentMode == mode_set_date){lcd_write_inst(time_start_addr); // move cursor to start }else if (CurrentMode == mode_set_alarm1){lcd_write_inst(time_secondl_addr+3);adjust_item = 6;}else if (CurrentMode == mode_set_alarm2){lcd_write_inst(time_secondl_addr+3);adjust_item = 6;}else{lcd_write_inst(0x0c); // LCD cursor off}}// ------------------------------------------------------- void set_date(void){if (adjust_item == 0) // adjust year{if ((KeyNew >=0) & (KeyNew <= 9)){CurrentDate.year1 = KeyNew;lcd_write_data(CurrentDate.year1 + '0');//lcd_write_inst(time_start_addr);adjust_item ++;}else if (KeyNew == key_left){adjust_item = 7;lcd_write_inst(time_start_addr + 9);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_start_addr + 1);}}else if(adjust_item == 1){if ((KeyNew >=0) & (KeyNew <= 9)){CurrentDate.year2 = KeyNew;lcd_write_data(CurrentDate.year2 + '0');//lcd_write_inst(time_start_addr + 1);adjust_item ++;}else if (KeyNew == key_left){adjust_item --;lcd_write_inst(time_start_addr + 0);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_start_addr + 2);}}else if(adjust_item == 2){if ((KeyNew >=0) & (KeyNew <= 9)){CurrentDate.year3 = KeyNew;lcd_write_data(CurrentDate.year3 + '0');//lcd_write_inst(time_start_addr + 2);adjust_item ++;}else if (KeyNew == key_left){adjust_item --;lcd_write_inst(time_start_addr + 1);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_start_addr + 3);}}else if(adjust_item == 3){if ((KeyNew >=0) & (KeyNew <= 9)){CurrentDate.year4 = KeyNew;lcd_write_data(CurrentDate.year4 + '0');//lcd_write_inst(time_start_addr + 3);adjust_item ++;lcd_write_inst(time_start_addr + 5);}else if (KeyNew == key_left){adjust_item --;lcd_write_inst(time_start_addr + 2);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_start_addr + 5);}}else if(adjust_item == 4)if (((CurrentDate.monthl>2) & (KeyNew == 0)) | ((CurrentDate.monthl == 0) & (KeyNew == 1))| (((CurrentDate.monthl == 1) | (CurrentDate.monthl == 2)) & (KeyNew <2))) {CurrentDate.monthh = KeyNew;lcd_write_data(CurrentDate.monthh + '0');//lcd_write_inst(time_start_addr + 5);adjust_item ++;}else if (KeyNew == key_left){adjust_item --;lcd_write_inst(time_start_addr + 3);}else if (KeyNew == key_right){adjust_item ++;lcd_write_inst(time_start_addr + 6);}}else if(adjust_item == 5){if (((CurrentDate.monthh == 3) & (KeyNew <2)) | ((CurrentDate.monthh != 3) & (KeyNew >=0) & (KeyNew <=9))){CurrentDate.monthl = KeyNew;lcd_write_data(CurrentDate.monthl + '0');//lcd_write_inst(time_start_addr + 6);adjust_item ++;lcd_write_inst(time_start_addr + 8);}else if (KeyNew == key_left){adjust_item --;lcd_write_inst(time_start_addr + 5);}else if (KeyNew == key_right){adjust_item ++;lcd_write_inst(time_start_addr + 8);}}else if(adjust_item == 6)if (((CurrentDate.dayl>1) & ((KeyNew == 1) | (KeyNew == 2))) | ((CurrentDate.dayl == 0) & (KeyNew >0) & (KeyNew<4))| ((CurrentDate.dayl == 1) & (KeyNew <4))){CurrentDate.dayh = KeyNew;lcd_write_data(CurrentDate.dayh + '0');//lcd_write_inst(time_start_addr + 8);adjust_item ++;}else if (KeyNew == key_left){adjust_item --;lcd_write_inst(time_start_addr + 6);}else if (KeyNew == key_right){adjust_item ++;lcd_write_inst(time_start_addr + 9);}}else if(adjust_item == 7){if (((CurrentDate.dayh == 3) & (KeyNew <2)) | ((CurrentDate.dayh != 3) & (KeyNew >=0) & (KeyNew <=9))){CurrentDate.dayl = KeyNew;lcd_write_data(CurrentDate.dayl + '0');//lcd_write_inst(time_start_addr + 9);adjust_item ++;lcd_write_inst(time_start_addr + 0);}else if (KeyNew == key_left){adjust_item --;lcd_write_inst(time_start_addr + 8);}else if (KeyNew == key_right){adjust_item = 0;lcd_write_inst(time_start_addr + 0);}}}// -------------------------------------------------------void set_time(void){if (adjust_item == 0) // set hourh{if (((CurrentTime.hourl <4) & (KeyNew < 3)) | ((CurrentTime.hourl >3) & (KeyNew <2))){CurrentTime.hourh = KeyNew;lcd_write_data(CurrentTime.hourh + '0'); // refresh hourh//lcd_write_inst(0x10); // move cursor backadjust_item ++;}else if(KeyNew == key_left){adjust_item = 5;lcd_write_inst(time_secondl_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_hourl_addr);}}else if (adjust_item == 1) // set hourl{if (((CurrentTime.hourh == 2) & (KeyNew < 4)) | ((CurrentTime.hourh < 2) & (KeyNew <=9))){CurrentTime.hourl = KeyNew;lcd_write_data(CurrentTime.hourl + '0'); // refresh hourl//lcd_write_inst(0x10); // move cursor backadjust_item ++;lcd_write_inst(time_minuteh_addr);}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_hourh_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_minuteh_addr);}}else if (adjust_item == 2) // set minuteh{if (KeyNew <6){CurrentTime.minuteh = KeyNew;lcd_write_data(CurrentTime.minuteh + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_hourl_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_minutel_addr);}}else if (adjust_item == 3) // set minutel{if ((KeyNew >=0) & (KeyNew <=9)){CurrentTime.minutel = KeyNew;lcd_write_data(CurrentTime.minutel + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;lcd_write_inst(time_secondh_addr);}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_minuteh_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_secondh_addr);}}else if (adjust_item == 4) // set secondh{if (KeyNew <6){CurrentTime.secondh = KeyNew;lcd_write_data(CurrentTime.secondh + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;}else if(KeyNew == key_left){adjust_item --;&nb, sp; lcd_write_inst(time_minutel_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_secondl_addr);}}else if (adjust_item == 5) // set secondl{if ((KeyNew >=0) & (KeyNew <=9)){CurrentTime.secondl = KeyNew;lcd_write_data(CurrentTime.secondl + '0');//lcd_write_inst(0x10); // move cursor backadjust_item = 0;lcd_write_inst(time_hourh_addr);}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_secondh_addr);}else if(KeyNew == key_right){adjust_item = 0;lcd_write_inst(time_hourh_addr);}}}// -------------------------------------------------------void set_alarm1(void){if (adjust_item == 0) // set hourh{if (((AlarmTime1.hourl <4) & (KeyNew < 3)) | ((AlarmTime1.hourl >3) & (KeyNew <2))){AlarmTime1.hourh = KeyNew;lcd_write_data(AlarmTime1.hourh + '0'); // refresh hourh//lcd_write_inst(0x10); // move cursor backadjust_item ++;}else if(KeyNew == key_left){adjust_item = 6;lcd_write_inst(time_secondl_addr + 3);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_hourl_addr);}}else if (adjust_item == 1) // set hourl{if (((AlarmTime1.hourh == 2) & (KeyNew < 4)) | ((AlarmTime1.hourh < 2) & (KeyNew <=9))){AlarmTime1.hourl = KeyNew;lcd_write_data(AlarmTime1.hourl + '0'); // refresh hourl//lcd_write_inst(0x10); // move cursor backadjust_item ++;lcd_write_inst(time_minuteh_addr);}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_hourh_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_minuteh_addr);}}else if (adjust_item == 2) // set minuteh{if (KeyNew <6){AlarmTime1.minuteh = KeyNew;lcd_write_data(AlarmTime1.minuteh + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_hourl_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_minutel_addr);}}else if (adjust_item == 3) // set minutel{if ((KeyNew >=0) & (KeyNew <=9)){AlarmTime1.minutel = KeyNew;lcd_write_data(AlarmTime1.minutel + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;lcd_write_inst(time_secondh_addr);}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_minuteh_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_secondh_addr);}}else if (adjust_item == 4) // set secondh{if (KeyNew <6){AlarmTime1.secondh = KeyNew;lcd_write_data(AlarmTime1.secondh + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_minutel_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_secondl_addr);}}else if (adjust_item == 5) // set secondl{if ((KeyNew >=0) & (KeyNew <=9)){AlarmTime1.secondl = KeyNew;lcd_write_data(AlarmTime1.secondl + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;lcd_write_inst(time_secondl_addr+3);}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_secondh_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_secondl_addr+3);}}else if (adjust_item == 6) // set on/off{if ((KeyNew == key_up) | (KeyNew == key_down)){if (Alarm1Enable){Alarm1Enable =false; // disable alarm1lcd_write_data('f');lcd_write_data('f');}else{Alarm1Enable =true; // enable alarm1lcd_write_data('n');lcd_write_data(' ');}//lcd_write_inst(time_secondl_addr+3);adjust_item = 0;lcd_write_inst(time_hourh_addr);Alarm1Cnt = 0;}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_secondl_addr);}else if(KeyNew == key_right){adjust_item = 0;lcd_write_inst(time_hourh_addr);}}}// -------------------------------------------------------void set_alarm2(void){if (adjust_item == 0) // set hourh{if (((AlarmTime2.hourl <4) & (KeyNew < 3)) | ((AlarmTime2.hourl >3) & (KeyNew <2))){AlarmTime2.hourh = KeyNew;lcd_write_data(AlarmTime2.hourh + '0'); // refresh hourh//lcd_write_inst(0x10); // move cursor backadjust_item ++;}else if(KeyNew == key_left){adjust_item = 6;lcd_write_inst(time_secondl_addr+3);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_hourl_addr);}}else if (adjust_item == 1) // set hourl{if (((AlarmTime2.hourh == 2) & (KeyNew < 4)) | ((AlarmTime2.hourh < 2) & (KeyNew <=9))){AlarmTime2.hourl = KeyNew;lcd_write_data(AlarmTime2.hourl + '0'); // refresh hourl//lcd_write_inst(0x10); // move cursor backadjust_item ++;lcd_write_inst(time_minuteh_addr);}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_hourh_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_minuteh_addr);}}else if (adjust_item == 2) // set minuteh{if (KeyNew <6){AlarmTime2.minuteh = KeyNew;lcd_write_data(AlarmTime2.minuteh + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_hourl_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_minutel_addr);}}else if (adjust_item == 3) // set minutel{if ((KeyNew >=0) & (KeyNew <=9)){AlarmTime2.minutel = KeyNew;lcd_write_data(AlarmTime2.minutel + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;lcd_write_inst(time_secondh_addr);}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_minuteh_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_secondh_addr);}}else if (adjust_item == 4) // set secondh{if (KeyNew <6){AlarmTime2.secondh = KeyNew;lcd_write_data(AlarmTime2.secondh + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_minutel_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_secondl_addr);}}else if (adjust_item == 5) // set secondl{if ((KeyNew >=0) & (KeyNew <=9)){AlarmTime2.secondl = KeyNew;lcd_write_data(AlarmTime2.secondl + '0');//lcd_write_inst(0x10); // move cursor backadjust_item ++;lcd_write_inst(time_secondl_addr+3);}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_secondh_addr);}else if(KeyNew == key_right){adjust_item ++;lcd_write_inst(time_secondl_addr+3);}}else if (adjust_item == 6) // set on/off{if ((KeyNew == key_up) | (KeyNew == key_down)){if (Alarm2Enable){Alarm2Enable =false; // disable alarm2lcd_write_data('f');lcd_write_data('f');}else{Alarm2Enable =true; // enable alarm2lcd_write_data('n');lcd_write_data(' ');}//lcd_write_inst(time_secondl_addr+3);adjust_item = 0;lcd_write_inst(time_hourh_addr);Alarm2Cnt = 0;}else if(KeyNew == key_left){adjust_item --;lcd_write_inst(time_secondl_addr);}else if(KeyNew == key_right){adjust_item = 0;lcd_write_inst(time_hourh_addr);}}}// -------------------------------------------------------void main(void){unsigned char cnt;TRISC = 0x03; // PORTC.3 drive led,low activePORTC_MAP = 0x00;led = 0;BackLightEn = 0;BackLightTimer = 0;PORTC = PORTC_MAP;TRISA = 0xff; // low half byte as keyscan inTRISE = 0x00;ADCON0 = 0x00;ADCON1 = 0x06; // all digital I/Oslcd_init();INTCON = 0x00;lcd_write_inst(0x80); // set lcd ddram addressfor (pStr = StrPower1;*pStr!=0;pStr++){lcd_write_data(*pStr);}lcd_write_inst(0x0c); // LCD cursor offPIR1 = PIR2 = 0x00;T1CON = 0x0f; // T1CON: -- T1CKPS1 T1CPS0 T1OSCEN /T1SYNC TMR1CS TMR1ONTMR1H = 0x80;TMR1L = 0x00;。
51 单片机 c 语言电子钟（已加入调时、闹铃、整点报时功能）效果图：程序如下：//51 单片机c 语言电子钟（已加入调时、闹铃、整点报时功能）#include<reg51.h>#include<absacc.h>#define uchar unsigned char #define uint unsigned int /* 七段共阴管显示定义*/ // 此表为LED 的字模,共阴数码管0-9 - uchar code dispcode[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}; // 段码控制/* 定义并初始化变量*/ uchar seconde=0;// 秒uchar minite=0;// 分uchar hour=12; // 时uchar shi=0;// 闹铃功能uchar fen=0;uchar bjcs;// 报警次数sbit P1_0=P1A0; //second 调整定义sbit P1_仁P1A1;//minite 调整定义sbit P1_2二PM2; //hour 调整定义sbitP1_5=P1A5; //整点报时sbit P1_3=P1A3; //闹铃功能，调整时间sbit P1_6=P1A6; //调整时sbit P1_7=P1A7; //调整分sbit P1_4=P1A4; //关闭闹铃/* 函数声明*/void delay(uint k ); // 延时子程序void time_pro( ); // 时间处理子程序void display( ); // 显示子程序void keyscan( ); // 键盘扫描子程序/*xx 子程序*/void delay (uint k){uchar j;while((k--)!=0){for(j=0;j<125;j++){;}}}/* 时间处理子程序*/void time_pro(void){if(seconde==60){seconde=0; minite++;if(minite==60){minite=0;hour++;if(hour==24){hour=0;}}}}/* 显示子程序*/void display(void){if(P1_3==1){P2=0XFE;PO=dispcode[seco nde%10];/秒个位delay(1);P2=0XFD;P0=dispcode[seco nde/10];〃秒十位delay(1);P2=0XFB;P0=dispcode[10];// 间隔符-delay(1);P2=0XF7;P0=dispcode[mi nite%10];〃分个位delay(1);P2=0XEF;P0=dispcode[minite/10];// 分十位delay(1);P2=0XDF;P0二dispcode[10];〃间隔符-delay(1);P2=0XBF;P0=dispcode[hour%10];〃时个位delay(1);P2=0X7F;P0=dispcode[hour/10];// 时十位delay(1);}}/* 键盘扫描子程序*/void keyscan(void){if(P1_0==0)//秒位的调整{delay (30);if(P1_0==0){seconde++;if(seconde==60){seconde=0;}}delay(250);}if(P1_仁=0)//分位的调整{delay(30);if(P1_1==0){minite++;if(minite==60){minite=0;}}delay(250);}if(P1_2==0)// 时位的调整{delay(30);if(P1_2==0){hour++;if(hour==24){hour=0;}}delay(250);}}/* 整点报警*/void zhengdian (void){if((seconde==0)&(minite==0))〃整点报时{P1_5=0;delay(1000);P1_5=1;}}/* 定时闹钟*/void dingshi(void){if(P1_3==0)〃按住P1_3BU不松，显示闹铃设置界面，分别按P1_6、P1_7设置闹铃时间。
VC++ 程序设计设置闹钟题目：ds坐火车的时候昏昏欲睡，可是担心错过站，于是拿出手机设置闹钟。
时间格式为hh:mm(0<=hh<=23,0<=mm<=59),如下图所示。
每次只能调整hh或者mm，数值增大或者减小一，并且如果mm从00->59，hh减少一，如果mm从59->00，hh增大一。
比如14:32->14:33至少需要调整1次，14:59->15:00至少需要调整1次。
你知道h0h0:m0m0->h1h1:m1m1至少需要调整多少次吗？Input第一行一个整数T，表示有T组测试样例每组测试样例中给出h0h0:m0m0 h1h1:m1m1Output至少调整的次数Sample Input314:32 14:3304:59 05:0014:12 08:56Sample Output1121答案：# include <stdio.h># include <math.h>int main(){int T,i,h0,m0,h1,m1,h,m,min,min2;scanf("%d",&T);for(i=0;i<T;i++){scanf("%d:%d %d:%d",&h0,&m0,&h1,&m1);h=h1-h0;m=m1-m0;min=abs(h)+abs(m);if(abs(h)>12)min=24-abs(h)+abs(m);m=m1-m0-60;h=h1-h0+1;if(m1-m0<=0){m=m1-m0+60;h=h1-h0-1;}min2=abs(h)+abs(m);if(abs(h)>12)min2=24-abs(h)+abs(m);if(min2<min)min=min2;printf("%d\n",min);}return 0;}。
定时闹钟C语言程序#include //头文件#include#define uchar unsigned char//宏定义#define uint unsigned intsbit key1=P3^5; //位声明sbit key2=P3^6;sbit key3=P3^7;sbit fmq=P2^0;uchar code table[]={0x3f,0x06,0x5b,//数码管显示的数值0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0xbf,0x86,0xdb,//带小数点的数值0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef};void jia(); //函数声明void jian();uchar table_1[6]; //定义数组，数组内含有6个数值uchar table_2[6];uchar shi=23,fen=59,miao=50; //显示初始值uchar shi1,fen1,miao1,shi2,fen2,miao2,shi3,fen3,miao3;//定义全局变量uchar flag,flag1,cnt,count;//定义全局变量void delay(uchar i) //延时函数，用于动态扫描数码管{uchar x,y;for(x=i;x>0;x--)for(y=110;y>0;y--);}void init() //初始化函数{TMOD=0X01; //工作方式1TH0=(65536-50000)/256; //定时时间为：50ms TL0=(65536-50000)%256;ET0=1; //打开定时器EA=1; //开总中断TR0=1; //启动定时器}void display() //显示子函数，用于显示时间数值{uchar i,j;table_1[0]=miao%10; //分离秒的各位与十位table_1[1]=miao/10;table_1[2]=fen%10+11; //分离分的各位与十位table_1[3]=fen/10;table_1[4]=shi%10+11; //分离时的各位与十位table_1[5]=shi/10;j=0x7f; //从秒到时的扫描for(i=0;i<6;i++){P2=j;P0=table[table_1[i]];//显示数值delay(10);j=_cror_(j,1);//循环右移}}void display_1() //显示子函数，用于显示定时时间{ uchar i,j;table_2[0]=miao2%10; //以下含义同上table_2[1]=miao2/10;table_2[2]=fen2%10+11;table_2[3]=fen2/10;table_2[4]=shi2%10+11;table_2[5]=shi2/10;j=0x7f;for(i=0;i<6;i++){P2=j;P0=table[table_2[i]];delay(10);j=_cror_(j,1);}}void shijian() //时间子函数{if(flag>=20) //判断是否到一秒{flag=0; //到了，则标志位清零miao++; //秒加1if(miao>=60) //判断秒是否到60s {miao=0;//到了，则清零fen++; //分加1if(fen>=59) //以下含义同上{fen=0;shi++;if(shi>23)shi=0;}}}}void key_scan() //键盘扫描子函数{uchar i; //定义局部变量if(key1==0){while(!key1) //防止掉显{if(cnt==0||cnt==1||cnt==2||cnt==3||cnt==4||cnt==8) {display();}if(cnt==5||cnt==6||cnt==7){display_1();}}cnt++; //记下按键key1按下的次数if(cnt==1) //第一次按下，停止计数TR0=0;if(cnt==2) //第二次按下{miao1=miao; //保存秒的数值miao=99;//显示99，表示可以调节秒的数值了for(i=0;i<100;i++)display(); //显示99miao=miao1; //恢复前一刻秒的数值}if(cnt==3) //以下含义同上{fen1=fen;fen=99;for(i=0;i<100;i++) display();fen=fen1;}if(cnt==4){shi1=shi;shi=99;for(i=0;i<100;i++) display();shi=shi1;}if(cnt==5){miao1=miao2; miao2=88;for(i=0;i<100;i++) display_1();miao2=miao1;}if(cnt==6){fen1=fen2;fen2=88;for(i=0;i<100;i++) display_1();fen2=fen1;}if(cnt==7){shi1=shi2;shi2=88;for(i=0;i<100;i++)display_1();shi2=shi1;}if(cnt==8) //第八次按下{TR0=1; //开始计数cnt=0; //按下次数清零}}if(key2==0) //判断key2是否按下{while(!key2) //防止掉显{if(cnt==0||cnt==1||cnt==2||cnt==3||cnt==4||cnt==8) {display();}if(cnt==5||cnt==6||cnt==7){display_1();}}jia();//调用加1的子函数}if(key3==0) //判断key3是否按下while(!key3) //防止掉显{if(cnt==0||cnt==1||cnt==2||cnt==3||cnt==4||cnt==8) {display();}if(cnt==5||cnt==6||cnt==7){display_1();}}jian(); //调用减1子函数}}void jia() //加1子函数{if(cnt==2) //判断key1按下的次数是否为2{miao++; //是，则秒加1if(miao>59) //判断秒是否大于59，是，则秒清零miao=0;}if(cnt==3) //以下含义同上{fen++;if(fen>59)fen=0;}if(cnt==4)shi++;if(shi>23)shi=0;}if(cnt==5){miao2++;if(miao2>59)miao2=0;}if(cnt==6){fen2++;if(fen2>59)fen2=0;}if(cnt==7){shi2++;if(shi2>23)shi2=0;}}void jian() //减1子函数{if(cnt==2) //判断key1按下的次数是否为2，是则秒减1 {miao--;if(miao==255) //判断秒是否减到255，是，则秒清零miao=59;}if(cnt==3) {fen--;if(fen==255) fen=59;}if(cnt==4) {shi--;if(shi==255) shi=23;}if(cnt==5) {miao2--;if(miao2==255) miao2=59;}if(cnt==6) {fen2--;if(fen2==255) fen2=59;}if(cnt==7) {shi2--;if(shi2==255)shi2=23;}}void clock() //闹铃子函数{if(miao2==miao) //显判断秒的数值是否相等if(fen2==fen) //是，在判断分是否相等if(shi2==shi) //是，再判断时是否相等{flag1=0; //是，则标志位，flag1清零while(!(flag1==100)) //判断flag1是否到100{fmq=0; //没有，则，继续驱动蜂鸣器响，时间约为：5s shijian(); //调用时间子函数display(); //调用显示子函数}fmq=1;//关闭蜂鸣器}}void main(){init();//调用初始化子函数while(1){key_scan(); //调用键盘扫描子函数shijian(); //时间子函数clock(); //闹钟子函数//显示子函数if(cnt==0||cnt==1||cnt==2||cnt==3||cnt==4||cnt==8) {display();}if(cnt==5||cnt==6||cnt==7){display_1();}}}void time0() interrupt 1 //定时器0{TH0=(65536-50000)/256; //初值50msTL0=(65536-50000)%256;flag++; //标志位flag1++;}参考链接：/doc/d415749112.html,/news/2010-02/1914.htm。
C语⾔实现简单的定时器本⽂实例为⼤家分享了C语⾔实现简单的定时器的具体代码，供⼤家参考，具体内容如下1.代码分析2.代码#include <stdio.h>#include <time.h>#include <conio.h>#ifndef CLOCKS_PER_SEC#define CLOCKS_PER_SEC 1000#endifint main( void ){clock_t start;long count = 1;start = clock();while(1){if((clock() - start) == CLOCKS_PER_SEC){printf("%ld\n",count++);start = clock();//break;}}getch();}3. 代码抽象出⼀个定时器函数 void timer（long time）void timer(long time){clock_t start;long count = 1;start = clock();while(1){if((clock() - start) != (time*CLOCKS_PER_SEC)) {//时间没有到，啥也不做，空循环}else {//时间到了退出循环// printf("%s","hello");break;}}}完整代码#include <stdio.h>#include <time.h>#include <conio.h>#ifndef CLOCKS_PER_SEC#define CLOCKS_PER_SEC 1000#endif/*** time 的单位为s*/void timer(long time){clock_t start;long count = 1;start = clock();while(1){if((clock() - start) != (time*CLOCKS_PER_SEC)) {//时间没有到，啥也不做，空循环}else {//时间到了退出循环// printf("%s","hello");break;}}}int main( void ){for(int i=0;i<10;i++){timer(1);printf("%d\n",i);}getch();}以上就是本⽂的全部内容，希望对⼤家的学习有所帮助，也希望⼤家多多⽀持。
