十单片机应用系统设计.ppt

,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,Beijing Institute of Petro-chemical Technology,*,可编辑,Kkkj,jh,课程名称：单片机原理与接口技术,第十章单片机应用系统设计,1,可编辑,一、设计要求,设计并制作出具有如下功能的电脑钟：,(1),自动计时，由,6,位,LED,显示器显示时、分、秒。,(2),具备校准功能，可以直接由,0,9,数字键设置当前时间。,(3),具备定时起闹功能。,(4),一天时差不超过,1,秒钟。,第十章单片机应用系统设计,2,可编辑,二、总体方案,1.,计时方案,方案一：采用实时时钟芯片。,方案二：软件控制。,2.,键盘,/,显示方案,方案一：串口扩展，,LED,静态显示。,方案二：,8155,扩展，,LED,动态显示。,显示方式框图,(a),静态显示框图；,(b),动态显示框图,3,可编辑,三、硬件设计,1.,电路原理图,4,可编辑,2.,系统工作流程,本电脑钟具备以下功能：,(1),时钟显示：,6,位,LED,从左到右依次显示时、分、秒，采用,24,小时计时。,(2),键盘功能：采用,4,3,键盘，包括：,0,9,数字键，键号为,00H,09HC/R,键 时间设定,/,启动计时键，键号为,0AH,ALM,键 闹钟设置,/,启闹,/,停闹键，键号为,0BH,(1),时间显示：上电后，系统自动进入时钟显示，从,00,：,00,：,00,开始计时，此时可以设定当前时间。,(2),时间调整：按下,C/R,键，系统停止计时，进入时间设定状态，系统保持原有显示，等待键入当前时间。按下,0,9,数字键可以顺序设置时、分、秒，并在相应,LED,管上显示设置值，直至,6,位设置完毕。系统将自动由设定后的时间开始计时显示。,(3),闹钟设置,/,启闹,/,停闹：按下,ALM,键，系统继续计时，显示,00,：,00,：,00,，进入闹钟设置状态，等待键入启闹时间。按下,0,9,数字键可以顺序进行相应的时间设置，并在相应,LED,管上显示设置值，直至,6,位设置完毕。这将启动定时启闹功能，并恢复时间显示。定时时间到，蜂鸣器鸣叫，直至重新按下,ALM,键停闹，并取消闹钟设置。,5,可编辑,四、软件设计,1.,系统资源分配,地 址,功 能,名 称,初始化值,30H35H,显示缓冲区，小时、分、秒（高位在前）,DISP0DISP5,00H,3CH3FH,计时缓冲区，时、分、秒、,100 ms,HOUR,，,MIN,，,SEC,，,MSEC,00H,40H42H,闹钟值寄存区，时、分、秒,AHOUR,，,AMIN,，,ASEC,FFH,50H7FH,堆栈区,PSW.5,计时显示允许位（,1,：禁止，,0,：允许）,F0,0,PSW.1,闹钟标志位（,1,：正在闹响，,0,：未闹响）,F1,0,电子钟控制软件片内,RAM,及标志位分配表,6,2.,软件流程,主程序流程图,Beijing Institute of Petro-chemical Technology,7,计时程序流程图,Beijing Institute of Petro-chemical Technology,8,时间设置,/,闹钟定时流程图,Beijing Institute of Petro-chemical Technology,9,键盘设置子程序流程图,Beijing Institute of Petro-chemical Technology,10,键盘扫描流程图,(4),键盘扫描程序模块,KEYSCAN,：流程图如图,9.7,所示。,Beijing Institute of Petro-chemical Technology,11,显示流程图,Beijing Institute of Petro-chemical Technology,12,定时比较流程图,Beijing Institute of Petro-chemical Technology,13,可编辑,ORG0000H,AJMPMAIN,ORG 000BH,AJMPCLOCK,ORG 0030H,PORT EQU 8000H,PORTA EQU 8001H,PORTB EQU 8002H,；*主程序,MAIN*,14,可编辑,PORTCEQU 8003H,DISP0 EQU 30H,DISP1 EQU 31H,DISP2 EQU 32H,DISP3 EQU 33H,DISP4 EQU 34H,DISP5 EQU 35H,HOUR EQU 3CH,15,MIN EQU 3DH,SEC EQU 3EH,MSEC EQU 3FH,AHOUR EQU 40H,AMINEQU 41H,ASEC EQU 42H,F1 BIT PSW.1,MAIN,：,MOV SP,，,#50H,；设置堆栈区,MOVX DPTR,，,#PORT,MOVA,，,#03H,Beijing Institute of Petro-chemical Technology,16,MOVX DPTR,，,A,；,8155,初始化,CLR F1,；清零闹钟标志位,CLRF0,；允许计时显示,MOV AHOUR,#0FFH,MOV AMIN,#0FFH,MOV ASEC,#0FFH,MOV R7,#10H,MOV R0,#DISP0,CLR A,Beijing Institute of Petro-chemical Technology,17,LOOP:MOV R0,A,INCR0,DJNZ R7,LOOP,；设置初值,MOV TMOD,，,#01H,MOV TL0,，,#0B0H,MOV TH0,，,#3CH,；定时器,0,初始化，定时,时间,100 ms,SETB TR0,；启动定时器,SETB EA,SETB ET0,；开中断,Beijing Institute of Petro-chemical Technology,18,BEGIN,：,ACALL ALARM,；调用定时比较,ACALL KEYSCAN,；调用键盘扫描,CJNE A,，,#0AH,，,NEXT1,；是,CLR/RST,键否？,CLR TR0,；是则暂时停止计时,MOV R1,，,#HOUR,；地址指针指向计时缓冲区首地址,AJMPMOD,Beijing Institute of Petro-chemical Technology,19,NEXT1,：,CJNE A,，,#0BH,，,BEGIN,；是,ALARM,键否？,JBF1,，,NEXT2,；闹钟正在闹响否？,MOVR1,，,#AHOUR,；地址指针指向闹钟值寄存区首地址,MOD,：,SETBF0,；置位时间设置,/,闹钟定时标志，禁止显示计时时间,ACALLMODIFY,；调用时间设置,/,闹钟定时程序,SETBTR0,；重新开始计时,CLRF0,；清零时间设置,/,闹钟定时标志，恢复显示计时时间,Beijing Institute of Petro-chemical Technology,20,AJMPBEGIN,NEXT2,：,SETBP1.0,；闹钟正在闹响，停闹,CLRF1,；清零闹钟标志,AJMPBEGIN,；*时间设,置,/,闹钟定时模块,MODIFY*,MODIFY,：,ACALLKEYIN,；调用键盘设置子程序,ACALL COMB,；调用合字子程序,RET,键盘设置子程序,KEYIN,：,KEYIN,：,PUSHPSW,PUSHACC,Beijing Institute of Petro-chemical Technology,21,SETBRS1,；保护现场,MOVR0,，,#DISP0,；,R0,指向显示缓冲区首地址,MOVR7,，,#06H,；设置键盘输入次数,L1,：,CLRRS1,ACALLKEYSCAN,；调用键盘扫描程序取按下键,的键号,SETB RS1,CJNEA,，,#0AH,，,L2,；键入数合法性检测（是否大,于,9,）,Beijing Institute of Petro-chemical Technology,22,L2,：,JNCL1,；大于,9,，重新键入,MOVR0,，,A,；键号送显示缓冲区,INCR0,DJNZR7,，,L1,；,6,位时间输入完否？未,完继续，否则返回,POPACC,POPPSW,CLRRS1,；恢复现场,RET,Beijing Institute of Petro-chemical Technology,23,；*键盘扫描子程序,KEYSCAN*,KEYSCAN:ACALLTEST,；调判按键是否按下子程序,TEST,JNZ REMOV,；有键按下调消抖延时,ACALLDISPLAY,ACALLALARM,AJMP KEYSCAN,；无键按下继续判是否按键,REMOV:ACALL DISPLAY,；调用显示子程序延时消抖,ACALLTEST,；再判是否有键按下,Beijing Institute of Petro-chemical Technology,24,2025/5/10 周六,25,JNZLIST,；有键按下转逐列扫描,ACALLDISPLAY,ACALL ALARM,AJMPKEYSCAN,；无键按下继续判是否按键,LIST:MOVR2,，,#0FEH,；首列扫描字送,R2,MOVR3,，,#00H,；首列键号送,R3,LINE0:MOVDPTR,，,#PORTA,；,DPTR,指针指向,8155,的,A,口,Beijing Institute of Petro-chemical Technology,26,MOV A,，,R2,；首列扫描字送,R2,MOVXDPTR,，,A,；首列扫描字送,8155,的,A,口,MOV DPTR,，,#PORTC,；,DPTR,指针指向,8155,的,C,口,MOVXA,，,DPTR,；读入,C,口的行状态,JB ACC.0,，,LINE1,；第,0,行键无键按下转第,1,行,MOVA,，,#00H,；第,0,行有键按下，行首键号送,A,AJMPTRYK,；求键号,Beijing Institute of Petro-chemical Technology,27,NEXT:INC R3,；扫描下一列,MOV A,，,R2,；列扫描字送,A,JNBACC.3,，,EXIT,；,4,列扫描完，重新进行 下一轮扫描,RL A,；,4,列未扫描完，扫描字左移扫描下一列,MOV R2,，,A,；扫描字送,A,AJMP LINE0,；转向扫描下一列,Beijing Institute of Petro-chemical Technology,28,EXIT:AJMP KEYSCAN,；等待下一次按键,TRYK:ADD A,，,R3,；按公式计算键码，求得键号,PUSH ACC,；键号入栈保护,LETK:ACALL TEST,；等待按键释放,JNZLETK,；按键未释放，继续等待,POPACC,；按键释放，键号出栈,RET,；键盘扫描结束，返回,Beijing Institute of Petro-chemical Technology,29,TEST:MOVDPTR,，,#PORTA,；,DPTR,指针指向,8155,的,A,口,MOV A,，,#00H,MOVX DPTR,，,A,；全扫描字,00H,送,8155,的,A,口,MOVDPTR,，,#PORTC,；,DPTR,指针指向,8155,的,C,口,MOVX A,，,DPTR,；读入,C,口行状态,CPLA,；,A,取反，以高电平表示有,键按下,ANLA,，,#07H,；屏蔽高,5,位,RET,Beijing Institute of Petro-chemical Technology,30,；*显示子程序,DISPLAY*,DISPLAY:JB F0,，,DISP,；允许时间显示标志,F0=1,转,DISP,ACALL SEPA,；否则调用,SEPA,刷新显示缓冲区,DISP:push psw,；动态扫描显示子程序,Pushacc,setb rs0,MOV dptr,，,#PORTA,Beijing Institute of Petro-chemical Technology,31,MOV A,，,#0FFH,MOVX DPTR,，,A,；关显示,mov r0,，,#disp0,mov r7,，,#00h,mov r6,，,#06h,mov r5,，,#0feh,dis1:mov dptr,，,#tab,mov a,，,r0,movc a,，,a+dptr,mov dptr,，,#portb,Beijing Institute of Petro-chemical Technology,32,movxdptr,，,a,mov dptr,，,#porta,mov a,，,r5,movx dptr,，,a,here:djnz r7,，,here,inc r0,mov a,，,r5,rl a,Beijing Institute of Petro-chemical Technology,33,mov r5,，,a,djnz r6,，,dis1,clr rs0,pop acc,pop psw,ret,tab:db 3fh,，,06h,，,5bh,，,4fh,，,66h,，,6dh,，,7dh,，,07h,db 7fh,，,6fh,，,77h,，,7ch,，,39h,，,5eh,，,79h,，,71h,；共阴极字型码表,Beijing Institute of Petro-chemical Technology,34,；*合字子程序,COMB*,COMB,：,MOV R0,，,#DISP1,；,R0,指向显示缓冲区小时,低位,ACALL COMB1,；合字,CJNE A,，,#24H,，,CHK,；小时大于,24,否？,CHK,：,JNCEXIT1,；大于,24,则取消本次设,置，退出,MOVR1,，,A,；否则小时送计时缓冲区,/,闹钟值寄存区小时单元,INCR1,Beijing Institute of Petro-chemical Technology,35,MOVR0,，,#DISP3,；,R0,指向显示缓冲区分低位,ACALLCOMB1,CJNEA,，,#60H,，,CHK1,CHK1,：,JNC EXIT1,MOV R1,，,A,INCR1,MOV R0,，,#DISP5,；,R0,指向显示缓冲区秒低位,ACALL COMB1,CJNEA,，,#60H,，,CHK2,Beijing Institute of Petro-chemical Technology,36,CHK2,：,JNCEXIT1,MOVR1,，,A,RET,EXIT1,：,AJMPMAIN,；输入不合法退出，重新清,零计时,COMB1,：,MOV A,，,R0,ANL A,，,#0FH,；取出低位,MOV43H,，,A,；暂存于,43H,单元,DECR0,；指向高位,Beijing Institute of Petro-chemical Technology,37,MOVA,，,R0,ANLA,，,#0FH,SWAPA,；高位送高,4,位,ORLA,，,43H,；高低位合并,RET,；*拆字子程序,SEPA*,SEPA,：,PUSH PSW,PUSH ACC,SETBRS0,Beijing Institute of Petro-chemical Technology,38,MOVR0,，,#DISP5,；指向显示缓冲区秒低位,MOVA,，,SEC,ACALLSEPA1,MOVA,，,MIN,ACALLSEPA1,MOVA,，,HOUR,ACALLSEPA1,POPACC,POPPSW,Beijing Institute of Petro-chemical Technology,39,RET,SEPA1,：,MOV 44H,，,A,；暂存,44H,ANLA,，,#0FH,；取出低位,MOV R0,，,A,；送显示缓冲区低位,DEC R0,；指向显示缓冲区高位,MOV A,，,44H,ANL A,，,#0F0H,；取出高位,SWAPA,；高位送往低,4,位形成高位数据,Beijing Institute of Petro-chemical Technology,40,MOVR0,，,A,；高位数据送显示缓冲区高位,RET,；*定时比较模块,ALARM*,ALARM,：,MOVA,，,ASEC,CJNEA,，,SEC,，,BACK,；秒单元相同则继续比较，否则返回,MOVA,，,AMIN,CJNEA,，,MIN,，,BACK,；分单元相同则继续比较，否则返回,MOVA,，,AHOUR,Beijing Institute of Petro-chemical Technology,41,CJNE A,，,HOUR,，,BACK,；小时单元相同定时时间到,CLRP1.0,；启动闹钟鸣叫,SETBF1,；置位闹钟标志,BACK,：,RET,；*定时器,0,中断服务子程序,CLOCK*,CLOCK,：,MOV TL0,，,#0B7H,MOVTH0,，,#3CH,；重装初值，时间校正,Beijing Institute of Petro-chemical Technology,42,PUSHPSW,PUSHACC,；保护现场,INCMSEC,MOVA,，,MSEC,CJNEA,，,#0AH,，,DONE,MOVMSEC,，,#00H,MOVA,，,SEC,INCA,Beijing Institute of Petro-chemical Technology,43,DAA,；二,十进制转换,MOVSEC,，,A,CJNEA,，,#60H,，,DONE,MOVSEC,，,#00H,MOVA,，,MIN,INCA,DAA,MOVMIN,，,A,Beijing Institute of Petro-chemical Technology,44,CJNEA,，,#60H,，,DONE,MOVMIN,，,#00H,MOVA,，,HOUR,INCA,DAA,MOVHOUR,，,A,CJNEA,，,#24H,，,DONE,MOVHOUR,，,#00H,Beijing Institute of Petro-chemical Technology,45,DONE,：,POPACC,POPPSW,；恢复现场,RETI,Beijing Institute of Petro-chemical Technology,46,可编辑,四、系统调试与脱机运行,1.,硬件调试,(1),脱机检查。,(2),联机调试。,2.,软件调试,(1),用仿真器修改显示缓冲区内容，屏蔽拆字程序，调试动态扫描显示功能。,(2),运行主程序调试计时模块，不按下任何键，检查是否能从由,00,：,00,：,00,开,始正确计时。,(3),调试键盘扫描模块,KEYSCAN,，,(4),调试时间设置,/,闹钟定时模块,MODIFY,。,(5),运行主程序联调，检查能否用键盘修改当前时间以及设置闹钟，能否正确计 时、启闹、停闹。,3.,脱机运行,47,END,Live for Yourself!,Beijing Institute of Petro-chemical Technology,48,2025/5/10 周六,49,