51 single chip microcomputer eight-way answering machine course design

My improved design solves the problem of No. 1 answering priority in the previous version, and adds a trick bag setting. When a contestant asks to use the trick bag when answering a question, the host presses the answer start button and the timing starts again.

;The eight-way buzzer circuit is simulated by PS and has been successfully tested.

Single chip eight-way buzzer program

OK EQU 20H; answer start flag

RING EQU 22H; Ringing flag

ORG 0000H

AJMP MAIN

ORG 0003H

AJMP INT0SUB

ORG 000BH

AJMP T0INT

ORG 0013H

AJMP INT1SUB

ORG 001BH

AJMP T1INT

ORG 0040H

MAIN: MOV R1,#30;The initial response time is 30s

MOV R2, #60; The initial answering time is 60 seconds

MOV TMOD,#11H; Set timer/mode 1

MOV TH0, #0F0H

MOV TL0, #0FFH; the higher the sound frequency, the sharper it is.

MOV TH1,#3CH

MOV TL1,#0B0H; 50ms is an overflow interrupt

SETB OF

SETB ET0

SETB ET1

SETB EX0

SETB EX1; Enable four interrupts, T0/T1/INT0/INT1

CLR OK

CLR RING

SETB TR1

SETB TR0; Start the timer at the beginning to display FFF. If you want to restart the count, just reset TH1/TL1.

;=====Query Program=====

START: MOV R5,#0BH

MOV R4, #0BH

MOV R3, #0BH

ACALL DISPLAY; Displays FFF before answering the question

JB P3.0,NEXT;ddddddd

ACALL DELAY

JB P3.0, NEXT; debounce, if the "start key" is pressed, it will execute downward, otherwise it will jump to the illegal answer query

ACALL BARK; key sound

MOV A,R1

MOV R6,A; send R1->R6, because R1 stores the answer time

SETB OK; answer flag, used in COUNT program to determine whether to query answer

MOV R7,#01H; Read the answer key data signal flag, here means only read the useful signal once

MOV R3,#0AH; only the time is displayed for the quick answer, and the number of numbers is eliminated

AJMP COUNT; Enter the countdown program, "Query the effective answer program" in COUNT

NEXT: JNB P1.0,FALSE1

JNB P1.1,FALSE2

JNB P1.2,FALSE3

JNB P1.3,FALSE4

JNB P1.4,FALSE5

JNB P1.5,FALSE6

JNB P1.6,FALSE7

JNB P1.7,FALSE8

AJMP START

;=====Procedure for handling illegal responses=====

FALSE1: MOV R3, #01H

AJMP ERROR

FALSE2: MOV R3,#02H

AJMP ERROR

FALSE3: MOV R3,#03H

AJMP ERROR

FALSE4: MOV R3, #04H

AJMP ERROR

FALSE5: MOV R3,#05H

AJMP ERROR

FALSE6: MOV R3,#06H

AJMP ERROR

FALSE7: MOV R3, #07H

AJMP ERROR

FALSE8: MOV R3,#08H

AJMP ERROR

;=====INT0 (response time R1 adjustment program)=====

INT0SUB:MOV A,R1

MOV B,#0AH

DIV AB

MOV R5,A

MOV R4,B

MOV R3,#0AH

ACALL DISPLAY; first display R1 on the two time LEDs

JNB P3.4, INC0; P3.4 is the +1s key, if pressed, jump to INCO

JNB P3.5,DEC0; P3.5 is -1s key, if pressed, jump to DECO

JNB P3.1, BACK0; P3.1 is the confirmation key, if pressed, jump to BACK0

AJMP INT0SUB

INC0: MOV A,R1

CJNE A, #63H, ADD0; If it is not 99, add 1 to R2. If it is 99, set R1 to 0 and start again.

MOV R1,#00H

ACALL DELAY1

AJMP INT0SUB

ADD0: INC R1

ACALL DELAY1

AJMP INT0SUB

DEC0: MOV A,R1

JZ SETR1; if R1 is 0, R1 is set to 99,

DEC R1

ACALL DELAY1

AJMP INT0SUB

SETR1: MOV R1,#63H

ACALL DELAY1

AJMP INT0SUB

BACK0: RETI

;=====INT1(Answer time R2 adjustment program)=====

INT1SUB:MOV A,R2

MOV B,#0AH

DIV AB

MOV R5,A

MOV R4,B

MOV R3,#0AH

ACALL DISPLAY

JNB P3.4,INC1

JNB P3.5,DEC1

JNB P3.1,BACK1

AJMP INT1SUB

INC1: MOV A,R2

CJNE A,#63H,ADD1

MOV R2, #00H

ACALL DELAY1

AJMP INT1SUB

ADD1: INC R2

ACALL DELAY1

AJMP INT1SUB

DEC1: MOV A,R2

SW SETR2

DEC R2

ACALL DELAY1

AJMP INT1SUB

SETR2: MOV R2,#63H

ACALL DELAY1

AJMP INT1SUB

BACK1: RETI

;=====Countdown program (both the quick response countdown and the answer countdown jump to this program)=====

REPEAT:MOV A,R2; Restart the timer when using the magic bag

MOV R6,A

CLR RING

COUNT: MOV R0,#00H; reset the timer interrupt count

MOV TH1,#3CH

MOV TL1,#0B0H; reset timer

RECOUNT:MOV A,R6; R6 saves the countdown time. The response time or answer time is given to R6.

MOV B,#0AH

DIV AB; Divide by ten and get the ones/tens digit

MOV 30H,A; tens digit is stored in (30H)

MOV 31H,B; the units digit is stored in (31H)

MOV R5,30H; take the tenth digit

MOV R4,31H; take the unit digit

MOV A,R6

SUBB A,#07H

JNC LARGER; jump to LARGER if it is greater than 5s, and will remind you if it is less than or equal to 5s

MOV A,R0

CJNE A,#0AH,FULL;0.5s down in 1s

CLR RING

AJMP CHECK

FULL: CJNE A, #14H, CHECK; The following is the situation of 1s, the sound is displayed and the number is cleared and R0 is restarted.

SETB RING

MOV A,R6

JZ QUIT; Timer expires

MOV R0,#00H

DEC R6; one second mark minus 1

AJMP CHECK

LARGER: MOV A,R0

CJNE A, #14H, CHECK; if 1s runs downward, otherwise jump to check "stop/display"

DEC R6; count down one second R6 automatically decreases by 1

MOV R0,#00H

CHECK: JNB P3.1, QUIT; Press the stop button to exit

JNB OK,CHECKK; only valid when answering the countdown

AJMP NEXTT

CHECKK:JNB P3.0,REPEAT; Determine whether to use the kit

NEXTT: ACALL DISPLAY

JB OK, ACCOUT; if it is a countdown for a quick answer, then query the quick answer, otherwise skip the query and continue the countdown (this serves to lock the quick answer)

AJMP RECOUNT

ACCOUNT:

MOV A,36H

JNB ACC.0,TRUE1

JNB ACC.1,TRUE2

JNB ACC.2,TRUE3

JNB ACC.3,TRUE4

JNB ACC.4,TRUE5

JNB ACC.5,TRUE6

JNB ACC.6,TZ1

JNB ACC.7,TZ2

AJMP RECOUNT

TZ1:JMP TRUE7

TZ2:JMP TRUE8

QUIT: CLR OK; if the "stop key" is pressed, the program executed

CLR RING

AJMP START

;=====Normal answer processing procedure=====

TRUE1: ACALL BARK

MOV A,R2

MOV R6,A; R2 for answer time to get R6

MOV R3, #01H

CLR OK; Because the timer for answering questions no longer checks for quick answers, the quick answers are locked

AJMP COUNT

TRUE2:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3, #02H

CLR OK

AJMP COUNT

TRUE3:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3,#03H

CLR OK

AJMP COUNT

TRUE4:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3, #04H

CLR OK

AJMP COUNT

TRUE5:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3, #05H

CLR OK

AJMP COUNT

TRUE6: ACALL BARK

MOV A,R2

MOV R6,A

MOV R3, #06H

CLR OK

AJMP COUNT

TRUE7:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3, #07H

CLR OK

AJMP COUNT

TRUE8:ACALL BARK

MOV A,R2

MOV R6,A

MOV R3, #08H

CLR OK

AJMP COUNT

;=====Foul Answer Procedure=====

ERROR: MOV R0,#00H

MOV TH1,#3CH

MOV TL1,#0B0H

MOV 34H,R3; Temporary storage of the foul number and (34H)

HERE: MOV A,R0

CJNE A,#06H,FLASH;0.3s downward operation->extinguish and stop ringing

CLR RING

MOV R3,#0AH

MOV R4,#0AH

MOV R5,#0AH; all three lights are off

AJMP CHECK1

FLASH: CJNE A, #0CH, CHECK1; The following is the situation of 0.8s, the sound is displayed and the number is cleared and R0 is reset.

SETB RING

MOV R0,#00H

MOV R3,34H; retrieve the number

MOV R5, #0BH

MOV R4,#0BH; Display FF ​​and number

AJMP CHECK1

CHECK1: JNB P3.1,QUIT1

ACALL DISPLAY

AJMP HERE

QUIT1: CLR RING

CLR OK

AJMP START

;=====Show program=====

DISPLAY:MOV DPTR,#DAT1; table lookup display program, use P0 port as segment selection code output/P2 lower three bits as bit selection code output,

MOV A,R3

MOVC A,@A+DPTR

MOV P2,#0feH

MOV P0,A

ACALL DELAY2

MOV DPTR,#DAT2

MOV A,R5

MOVC A,@A+DPTR

MOV P2,#0fdH

MOV P0,A

ACALL DELAY2

MOV A, R4

MOVC A,@A+DPTR

MOV P2,#0fbH

MOV P0,A

ACALL DELAY2

RIGHT

DAT1:DB 00h,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh,00H,71H

;"灭","1","2","3","4","5","6","7","8","9","灭","F"

DAT2:DB 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh,00H,71H

; The first one is zero, the others are the same as above, because if the tens digit is zero, the display will go out

;====Addition and subtraction time delay (add N numbers without pressing)======

DELAY1: MOV 35H,#08H

LOOP0: ACALL DISPLAY

DJNZ 35H,LOOP0

RIGHT

;=====Delay 4236 machine cycles (used for debouncing)=====

DELAY: MOV 32H,#12H

LOOP: MOV 33H,#0AFH

LOOP1: DJNZ 33H,LOOP1

DJNZ 32H,LOOP

RIGHT

;=====Delay 4236 machine cycles (used for display)=====

DELAY2: MOV 32H,#43H

LOOP3: MOV 33H,#1EH

MOV A, R7; read P1 port once every 60~70 machine cycles. If all are 1, it is invalid data. Continue reading. If one is not 1, go to normal response processing.

JNZ AAAA1; Continue to AAAA1 if no valid data is read

LOOP2: DJNZ 33H,LOOP2

DJNZ 32H,LOOP3

RIGHT

;=====Read the answer key data port program=====

;When reading the answer data port, the MCU first enters the countdown program, then calls the display program, and finally detects the key port

;However, when detecting the key port, dynamic scanning needs to call the delay program three times (4ms). This will cause a lag in reading the data port, resulting in the highest priority for No. 1 and the lowest priority for No. 8.

Therefore, a data port reading program is added to the delay subroutine to ensure sensitivity and reliability.

AAAA1: MOV A,P1

CJNE A,#0FFH,AA1; Data that is not all 1 is valid data

AA0: MOV 36H,A; send valid data to 36H for temporary storage

AJMP LOOP2

AA1: DEC R7

AJMPAA0

;=====Voice Program=====

BARK: SETB RING

ACALL DELAY1

ACALL DELAY1

CLR RING; key sound

RIGHT

;=====TO overflow interrupt (ring program)=====

T0INT: MOV TH0,#0ECH

MOV TL0,#0FFH

JNB RING,OUT;

CPL P3.6; When the RING flag is 1, the P3.6 port is not shorted and the speaker emits a certain frequency sound.

OUT: RETI

;=====T1 overflow interrupt (timing program)=====

T1INT: MOV TH1,#3CH

MOV TL1,#0B0H

INC R0

RARELY

END