AT89C51单片机的数字时钟设计ppt课件.ppt

1,2,3,4,5,6,7,8,9,10,1.模式0,显示时钟,11,2.模式1,第1次按KEY1键选择调秒,12,3.模式2,第2次按KEY1键选择调分,13,4.模式3,第3次按KEY1键选择调时,14,KEY1BITP1.0KEY2BITP1.1KEY3BITP1.2CLKBITP1.3LOADBITP1.4DINBITP1.5SECONDDATA30HMINUTEDATA31HHOURDATA32HORG0000HAJMPMAINORG000BHAJMPTIMER0MAIN:MOVSP,#60HMOVTMOD,#01H；定时器T0方式设置,MOVTH0,#0B1H；定时器T0装入初值20msMOVTL0,#0E0HSETBET0；T0中断允许SETBEA；总中断允许MOVR2,#50；T0中断为1sSETBTR0；启动T0MOVSECOND,#00HMOVMINUTE,#00HMOVHOUR,#08H；初始化时间8点00分00秒MOVA,HOUR时间值送显示缓冲区79H7EHANLA,#0F0HSWAPAMOV79H,A,15,MOVA,HOURANLA,#0FHMOV7AH,AMOVA,MINUTEANLA,#0F0HSWAPAMOV7BH,AMOVA,MINUTEANLA,#0FHMOV7CH,AMOVA,SECONDANLA,#0F0HSWAPAMOV7DH,AMOVA,SECONDANLA,#0FHMOV7EH,AMOVR3,#00H；R3初值设为0，显示时钟ACALLINI7219；调用7219初始化子程序,INI7219:MOV50H,#0FH；显示测试寄存器设置MOV51H,#00H；非测试模式，正常显示MOVR0,#50HACALLSEND7219MOV50H,#0CH；关闭显示寄存器MOV51H,#01H；正常显示MOVR0,#50HACALLSEND7219MOV50H,#0BH；扫描界限寄存器MOV51H,#05H；6位显示MOVR0,#50HACALLSEND7219MOV50H,#0AH；亮度寄存器，其值为000EH，设置为0AH,16,MOV51H,#09HMOVR0,#50HACALLSEND7219MOV50H,#09H；译码方式寄存器MOV51H,#0FFH；8位显示全部B译码MOVR0,#50HACALLSEND7219RETDISPLAY:MOV50H,#01H；显示子程序MOV51H,79H；显示缓冲区设在79H7EH单元MOVR0,#50H；其内容从左至右一次显示在数码管显示器上ACALLSEND7219MOV50H,#02HMOV51H,7AH,MOVR0,#50HACALLSEND7219MOV50H,#03HMOV51H,7BHMOVR0,#50HACALLSEND7219MOV50H,#04HMOV51H,7CHMOVR0,#50HACALLSEND7219MOV50H,#05HMOV51H,7DHMOVR0,#50HACALLSEND7219MOV50H,#06HMOV51H,7EHMOVR0,#50HACALLSEND7219RET,17,SEND7219:CLRLOAD；向7219写入数据子程序MOVR4,#02H；写入16位串行数据CLRCLOP1:MOVR1,#08HMOVA,R0LOP2:RLCAMOVDIN,CSETBCLKCLRCLKDJNZR1,LOP2INCR0DJNZR4,LOP1SETBLOADRET；键扫描处理子程序KEY:JNBKEY1,KK1；判断KEY1键是否按下JBKEY1,$；等待KEY1键是否释放,INCR3；模式值增1，在0、1、2、3间逐项切换CJNER3,#04H,JMPKK3；当让中的模式值为4时，在设置为0MOVR3,#00HJMPKK3:AJMPKK3；转至KK3，按R3内容选择显示KK1:JNBKEY2,KK2；判断KEY2键是否按下JBKEY2,$；等待KEY2键释放MOVA,R3；根据当前R3值对时间项增1调整RLAMOVDPTR,#KJMP1JMPA+DPTRKJMP1:AJMPDISCLKAJMPSINCAJMPMINCAJMPHINC,18,SINC:MOVA,SECOND；秒增1ADDA,#01HDAAMOVSECOND,ACJNEA,#60H,DISS1MOV30H,#01HDISS1:AJMPDISS；转至秒显示缓冲区设置MINC:MOVA,MINUTE；分增1ADDA,#01HDAAMOVMINUTE,ACJNEA,#60H,DISM1MOVMINUTE,#00HDISM1:AJMPDISM；转至分显示缓冲区设置HINC:MOVA,HOUR；时增1ADDA,#01HDAAMOVHOUR,A,CJNEA,#24H,DISH1MOVHOUR,#00HDISH1:AJMPDISH；转至时显示缓冲区设置KK2:JNBKEY3,KK3；判断KEY3是否按下JBKEY3,$；等待KEY3键释放MOVA,R3RLAMOVDPTR,#KJMP2JMPA+DPTRKJMP2:AJMPDISCLKAJMPSDECAJMPMDECAJMPHDECSDEC:MOVA,#9AH；秒减1CLRCSUBBA,#01HADDA,SECONDDAA,19,MOVSECOND,ACJNEA,#00H,DISS2MOVSECOND,#59HDISS2:AJMPDISS；转至秒显示缓冲区设置MDEC:MOVA,#9AH；分减1CLRCSUBBA,#01HADDA,MINUTEDAAMOVMINUTE,ACJNEA,#0,DISM2MOVMINUTE,#59HDISM2:AJMPDISM；转至分显示缓冲区设置HDEC:MOVA,#9AH；时减1CLRCSUBBA,#01HADDA,HOURDAA,MOVHOUR,ACJNEA,#99H,DISH2MOVHOUR,#23HDISH2:AJMPDISH；转至时显示缓冲区设置KK3:MOVA,R3RLAMOVDPTR,#KJMP3JMPA+DPTRKJMP3:AJMPDISCLK；R3=0显示时钟AJMPDISS；R3=1显示秒AJMPDISM；R3=2显示分AJMPDISH；R3=3显示时DISCLK:MOVR0,#79HMOVR1,#HOURMOVR4,#03H,20,CFLOOP:MOVA,R1SWAPAANLA,#0FHMOVR0,AINCR0MOVA,R1ANLA,#0FHMOVR0,AINCR0DECR1DJNZR4,CFLOOPSETBTR0RETDISS:CLRTR0；显示秒，时与分的数码管不亮MOVA,SECONDSWAPAANLA,#0FHMOV7DH,AMOVA,SECOND,ANLA,#0FHMOV7EH,AMOV79H,#0FHMOV7AH,#0FHMOV7BH,#0FHMOV7CH,#0FHAJMPKK5DISM:CLRTR0；显示分，时与秒的数码管不亮MOVA,MINUTESWAPAANLA,#0FHMOV7BH,AMOVA,MINUTEANLA,#0FHMOV7CH,AMOV79H,#0FHMOV7AH,#0FHMOV7DH,#0FHMOV7EH,#0FHAJMPKK5,21,DISH:CLRTR0；显示时，分与秒的数码管不亮MOVA,HOURSWAPAANLA,#0FHMOV79H,AMOVA,HOURANLA,#0FHMOV7AH,AMOV7BH,#0FHMOV7CH,#0FHMOV7DH,#0FHMOV7EH,#0FHKK5:RET；定时器T0中断处理子程序TIMER0:PUSHACC；保护现场PUSHPSWMOVTH0,#0B1H；重装定时常数MOVTL0,#0E0HDJNZR2,NEXT；判断是否中断了50次，不足50次，中断返回MOVR2,#50；若达到50次，计时满1s，刷新时间单元格,MOVA,SECONDADDA,#01HDAAMOVSECOND,ACJNEA,#60H,NEXTS1: