基于单片机的时钟调整系统Word文档下载推荐.docx

基于单片机的时钟调整系统Word文档下载推荐.docx

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4、显示子程序

显示由MAX7219驱动的六位显示器和点阵LED显示器共同完成，首先对其进行初始化，然后用单片机控制显示器显示。

MAX7219驱动器显示流程图

图2显示子程序

5、定时器T0中断服务程序

定时溢出中断周期设为50MS，中断进入后先进行定时中断初值校正，当中断累加到20次时，对秒计数单元进行加1操作。

时钟最大计时值为23时59分59秒。

在计数单元中，采用十进制BCD码计数，满十进位。

流程图如图3所示

在程序中采用12MHZ晶振频率，精度为1MS，定时初值为50MS，用循环程序进行20次循环可到1S。

当1S到时调用加1程序并判断秒、分是否为60，当秒为60时，秒清零，分加1；

当分为60时，分清零。

当时满24时，星期加1，时清零，星期由1至7循环。

终端结束时，计时单元数据移入对应显示单元。

三、按键设置

本时钟设置P1.0，P1.1，P1.2接3个按钮开关，用于调时。

其中P1.0用于选择调时模式（对星期，小时，分钟，秒的选择），P1.1完成对所选的项目进行增一的操作，P1.2完成对所选项目进行减一的操作。

四、程序

KEY1BITP1.0

KEY2BITP1.1

KEY3BITP1.2

CLKBITP1.3

LOADBITP1.4

DINBITP1.5

SECONDDATA30H

MINUTEDATA31H

HOURDATA32H

DAYDATA33H

ORG0000H

AJMPMAIN

ORG000BH

AJMPTIMER0

MAIN:

MOVSP,#60H

MOVTMOD,#01H

MOVTH0,#0B1H

MOVTL0,#0E0H

SETBET0

SETBEA

MOVR2,#50

SETBTR0

MOVSECOND,#00H

MOVMINUTE,#00H

MOVHOUR,#00H

MOVDAY,#00H

MOVA,HOUR

ANLA,#0F0H

SWAPA

MOV79H,A

ANLA,#0FH

MOV7AH,A

MOVA,MINUTE

MOV7BH,A

MOVA,MINUTE

MOV7CH,A

MOVA,SECOND

MOV7DH,A

MOV7EH,A

MOVR3,#00H

ACALLINT7219

LOOP:

ACALLKEY

ACALLDISPLAY

AJMPLOOP

INT7219:

MOV50H,#0FH

MOV51H,#00H

MOVR0,#50H

ACALLSEND7219

MOV50H,#0CH

MOV51H,#01H

MOV50H,#0BH

MOV51H,#05H

MOV50H,#0AH

MOV51H,#09H

MOV50H,#09H

MOV51H,#0FFH

ACALLD1

RET

DISPLAY:

MOV50H,#01H

MOV51H,79H

MOVR0,#50H

MOV50H,#02H

MOV51H,7AH

MOV50H,#03H

MOV51H,7BH

MOV50H,#04H

MOV51H,7CH

MOV50H,#05H

MOV51H,7DH

MOV50H,#06H

MOV51H,7EH

SEND7219:

CLRLOAD

MOVR4,#02H

CLRC

LOP1:

MOVR1,#08H

MOVA,@R0

LOP2:

RLCA

MOVDIN,C

SETBCLK

CLRCLK

DJNZR1,LOP2

INCR0

DJNZR4,LOP1

SETBLOAD

D1:

MOVR6,#0FEH

MOVA,33H

RLA

MOVR4,A

LP:

MOVP3,#0FFH

MOVA,R4

INCR4

MOVDPTR,#DTAB

MOVCA,@A+DPTR

MOVP0,A

MOVA,R6

MOVP3,A

MOVR6,A

ACALLDEL

DJNZR1,LP

RET

DEL:

MOVR7,#02H

DL0:

MOVR0,#0FFH

DL6:

DJNZR0,DL6

DJNZR7,DL0

KEY:

JNBKEY1,KK1

JBKEY1,$

INCR3

CJNER3,#05H,JMPKK3

MOVR3,#00H

JMPKK3:

AJMPKK3

KK1:

JNBKEY2,KK2

JBKEY2,$

MOVA,R3

RLA

MOVDPTR,#KJMP1

JMP@A+DPTR

KJMP1:

AJMPDISCLK

AJMPSINC

AJMPMINC

AJMPHINC

AJMPDINC

SINC:

MOVA,SECOND

ADDA,#01H

DAA

MOVSECOND,A

CJNEA,#60H,DISS1

MOV30H,#01H

DISS1:

AJMPDISS

MINC:

MOVA,MINUTE

MOVMINUTE,A

CJNEA,#60H,DISM1

MOVMINUTE,#00H

DISM1:

AJMPDISM

HINC:

MOVA,HOUR

MOVHOUR,A

CJNEA,#24H,DISH1

MOVHOUR,#00H

DISH1:

AJMPDISH

DINC:

MOVA,DAY

ADDA,#01H

MOVDAY,A

CJNEA,#07H,DISD1

DISD1:

AJMPDISD

KK2:

JNBKEY3,KK3

JBKEY3,$

MOVDPTR,#KJMP2

KJMP2:

AJMPSDEC

AJMPMDEC

AJMPHDEC

AJMPDDEC

SDEC:

MOVA,#9AH

SUBBA,#01H

ADDA,SECOND

CJNEA,#00H,DISS2

MOVSECOND,#59H

DISS2:

MDEC:

ADDA,MINUTE

CJNEA,#00H,DISM2

MOVMINUTE,#59H

DISM2:

HDEC:

ADDA,HOUR

CJNEA,#99H,DISH2

MOVHOUR,#23H

DISH2:

DDEC:

CLRC

SUBBA,#01H

ADDA,DAY

DAA

CJNEA,#99H,DISD2

MOVA,#06H

DISD2:

MOVDAY,A

KK3:

MOVDPTR,#KJMP3

KJMP3:

AJMPDISS

AJMPDISM

AJMPDISH

DISCLK:

MOVR0,#79H

MOVR1,#HOUR

MOVR4,#03H

CFLOOP:

MOVA,@R1

MOV@R0,A

MOVA,@R1

INCR0

DECR1

DJNZR4,CFLOOP

SETBTR0

RET

DISS:

CLRTR0

MOVA,SECOND

MOV7DH,A

MOV7EH,A

MOV79H,#0FH

MOV7AH,#0FH

MOV7BH,#0FH

MOV7CH,#0FH

AJMPKK5

DISM:

MOVA,MINUTE

MOV7BH,A

ANLA,#0FH

MOV7CH,A

MOV79H,#0FH

MOV7AH,#0FH

MOV7DH,#0FH

MOV7EH,#0FH

AJMPKK5

DISH:

MOVA,HOUR

MOV79H,A

MOV7AH,A

MOV7DH,#0FH

MOV7EH,#0FH

AJMPKK5

DISD:

CLRTR0

MOV79H,#0FH

MOV7AH,#0FH

MOV7BH,#0FH

KK5:

TIMER0:

PUSHACC

PUSHPSW

MOVTH0,#0B1H

MOVTL0,#0E0H

DJNZR2,NEXT

MOVR2,#50

CJNEA,#60H,NEXT

S1:

MOVSECOND,#00H

ADDA,#01

S2:

CJNEA,#24H,NEXT

S3:

MOVHOUR,#00H

MOVA,DAY

ADDA,#01H

MOVDAY,A

CJNEA,#07H,NEXT

MOVDAY,#00H

NEXT:

POPPSW

POPACC

RETI

DTAB:

DB00H,08H,08H,08H,08H,08H,08H,00H

DB00H,04H,24H,24H,24H,24H,04H,00H

DB00H,02H,52H,52H,52H,52H,02H,00H

DB00H,0FFH,91H,0F1H,81H,0F1H,91H,0FFH

DB91H,91H,91H,0FFH,91H,91H,9FH,01H

DB20H,22H,24H,0A8H,60H,28H,24H,22H

DB00H,00H,0FFH,91H,91H,0FFH,00H,00H

END

五、运用Proteus进行仿真

1、正常状态下的时钟显示

6、按一次KEY1对时进行调整

3、按两次KEY1对分进行调整

4、按三次KEY1对秒进行调整

5、按四次KEY1进入关机

6、按五次KEY1返回正常显示模式

操作模式

KEY1次数

1

2

3

4

5

调整模式

调秒

调分

调时

调星期

正常显示

设计说明及建议：

本设计特点在于同时采用由MAX7219驱动六位LED显示器和点阵LED显示器，利用前者的设计程序简便性和后者的显示的多样性以达到理想效果。

参考文献：

【1】赵嘉蔚，张家栋，霍凯，肖燕彩.单片机原理及接口技术【M】.清华大学出版社2010