1、LED电源跳线2针10k复位电阻单独按键双排针218针MAX232外围电容4复位电容电源指示灯电阻1kLED限流电阻电源指示灯数码管锁存器74HC573数码管蜂鸣器PNP三极管电阻1k1089C52RC芯片硬件连接电路图如下图所示:四、使用说明接上USB接口后,按下电源按键,数码管就开始计时,显示时间,从左到右依次显示时、分、秒;当需要调整时间时,按下键时分秒调整键可以进行对时、分、秒的设定;当有病人呼叫时,数码管就会显示数量和床号,并伴有蜂鸣器响,直到按下应答键后,数码管又重新显示时间,蜂鸣器停止响声。五、流程图设计六、程序设计如下 LEDBuf EQU 60H ; 显示缓冲 LEDBuf1
2、 EQU 80H Hour EQU 40H Minute EQU 41H Second EQU 42H C100us EQU 43H chuanggao EQU 70h chuangdi EQU 71H shuliang EQU 72H Tick EQU 10000 T100us EQU 256-100 ORG 0000H LJMP MAIN ORG 0003H LJMP MT ORG 000BH LJMP TOINT ORG 0013H LJMP HT ORG 001BH LJMP T1INT MAIN: MOV TMOD, #22h ; 模式2, 定时器 0.1毫秒中断一次 MOV TH0
3、, #T100us MOV TL0, #T100us MOV TL1, #6H MOV TH1 ,#6H MOV IE, #10001010b ; EA=1, IT0 = 1 MOV Hour, #0 MOVv Minute, #0 MOV Second, #0 MOV C100us, #high(Tick) MOV C100us+1, #low(Tick) SETB IT0 SETB IT1 SETB EX0 SETB EX1 SETB IE0 SETB IE1 MOV Minute, #0 MOV Hour, #0 SETB TR0 MOV p0, #0h SETB p0.7 LJMP M
4、Loop MT:MOV Second, # ;分调整 INC Minute MOV A,Minute CJNE A ,#60,LOP1 MOV Minute, #0 LOP1: RETI HT: MOV Second, #0 ;时调整 INC Hour MOV A, Hour CJNE A, #24, lop2 MOV Hour,#0 lop2: MLoop: MOV A, Hour MOV B, #10 DIV AB CALL ToLED MOV LEDBuf+5, A MOV A, B MOV LEDBuf+4, A MOV A, Minute MOV LEDBuf+3, A MOV A,
5、B ORL a, #01h MOV LEDBuf+2,A MOV A, Second MOV LEDBuf+1,A MOV LEDBuf, A CALL DisplayLED MOV R1,#73h MOV R3,#0 JB P0.0,tiao1 k1 : JB P0.1 ,tiao2 k3: JB P0.2,tiao3 k4: JB P0.3,tiao4 k5: JB P0.4,tiao5 k6: JB P0.5,tiao6 k7: JB P0.6,tiao7 k2: JB P0 ,xian LJMP MLoop tiao1: SETB TR1 SETB F0 INC R3 MOV 30H,
6、R3 MOV R1,#1 INC R1 SJMP k1 tiao2 : SETB TR1 MOV R1,#2 INC R1 SJMP k3 tiao3 : MOV R1,#3 SJMP k4 tiao4 : SETB F0 INC R3 MOV 30h,R3 MOV R1,#4 SJMP k5 tiao5 : MOV 30h,R3 MOV R1,#5 SJMP k6 tiao6 : MOV R1,#6 SJMP k7 tiao7 : MOV 30H,R3 MOV R1,#7 SJMP k2 xian: CLR F0 MOV A, chuanggao MOV LEDBuf+4,A MOV A,
7、chuangdi CALL ToLED ORL A, #80H MOV A, shuliang MOV LEDBuf+1, A JNB P3.0 ,lp1 CJNE R3 ,#0,xian LJMP xun lp1: CLR TR1 ;关振铃器返回显示时间 LJMP mloop xun: MOV R3 ,30H ;重新置初值 MOV A, R1 ADD A ,30H MOV R1,A LJMP xian T1INT: CPL P0.7 ;定时器1中断程序 RETI TOINT: PUSH PSW PUSH ACC MOV A, C100us+1 JNZ Goon DEC C100us Goon
8、: DEC C100us+1 MOV A, C100us ORL A, C100us+1 JNZ Exit DEC R1 DEC R3 MOV chuanggao,#0 MOV chuangdi,R1 MOV shuliang,30H INC Second CJNE A, #60, Exit INC Minute MOV Minute, #0 INC Hour CJNE A, #24, Exit Exit: POP ACC POP PSW RETI Delay: ; 延时子程序 MOV R7, #0 DelayLoop: DJNZ R7, DelayLoop DJNZ R6, DelayLoo
9、p RET LEDMAP: 八段管显示码 DB 3fh, 06h, 5bh, 4fh, 66h, 6dh, 7dh, 07h DB 7fh, 6fh, 77h, 7ch, 39h, 5eh, 79h, 71h DisplayLED: MOV R0, #LEDBuf MOV R5, #6 ; 共6个八段管 MOV R2, #01111111b ; 从左边开始显 Loop: SETB P2.1 MOV P1,#0H ; 关所有八段管 MOV A, R0 CLR P2.1 SETB P2.0 MOV P1,A CLR P2.0 MOV A, R2 MOV P1, A ; 显示一位八段管 MOV R6, #1 CALL Delay MOV A, R2 ; 显示下一位 RR A MOV R2, A INC R0 DJNZ R5, Loop ToLED: MOV DPTR, #LEDMap MOVC A, A+DPTRr END 七、心得体会 课程设计是培养学生综合运用所学知识,发现、提出、分析和解决实际问题,锻炼实践能力的重要环节,是对学生实际工作能力的具体训练和考察过程。随着科学技术发展的日新日异,单片机已经成为当今计算机应用中空前活跃的领域, 在生活中可以说得是无处不在。因此作为电气工程专业的学生来说掌握单片机的开发技术
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