MCU flashing light assembly language source code Daquan (assembly language source code of four flashing lights)

1, microcontroller AT89C51 P2 port connected to eight light-emitting diodes, so that the eight light-emitting diodes show flashing function, that is, eight lights on 2S, 3S off, so the cycle.

Reference program

ORG 0000H

Start: MOV P1, #0H

CALL delay

MOV P1, #0FFH

CALL delay

CALL delay

LJMP start

Delay:

MOV R7, #200

D2: MOV R6, #250

D1: DJNZ R6,d1

DJNZ R7,d2

RET

END

;200*250 times*2*1us=1000ms=1s

MCU AT89C51 P2 port connected to 8 light-emitting diodes, so that the 8 light-emitting diodes interact flashing 5 times, and then double-lamp after the left shift and then double-right shift, so the cycle, the effect of forming a water lamp, delay 0.5S.

ORG 0000H

MOV R0, #5

Start:

MOV P1, #10101010B

CALL delay

MOV P1, #01010101B

CALL delay

DJNZ R0,start

MOV R0, #5

MOV A, #11111100B

S1: MOV P1, A

CALL delay

RL A

RL A

CJNE A, #11111100B, s1

S2: RR A

RR A

MOV P1, A

CALL delay

CJNE A, #11111100B, s2

JMP start

Delay: MOV R5, #100

K1: MOV R6, #250

K2: MOV R7, #250

K3: DJNZ R7,k3

DJNZ R6,k2

DJNZ R5,k1

RET

END

P2.0, P2.1 and P2.2 of the one-chip computer AT89C51 are connected to the button switches PB1, PB2 and PB3 respectively; P1.0 is connected to one LED. Press PB1, the LED is on; press PB2 the LED is off; press PB3 the LED flashes. The delay is 0.1S.

Reference procedure:

ORG 0000H

MOV P2, #0FFH

S1: JNB P2.0,s3

JNB P2.1, s2

JNB P2.2, s4

JMP s1

S2: SETB P1.0

JMP s1

S3: CLR P1.0

JMP s1

S4: SETB P1.0

CALL delay

CLR P1.0

CALL delay

JNB P2.0, s3

JNB P2.1, s2

JMP s4

Delay: MOV R5, #100

K1: MOV R6, #250

K2: MOV R7, #250

K3: DJNZ R7,k3

DJNZ R6,k2

DJNZ R5,k1

RET

END

P2.0, P2.1 and P2.2 of the one-chip computer AT89C51 are connected to the button switches PB1, PB2 and PB3, respectively; the P1 port is connected to 8 LEDs. Press PB1, 8 LEDs flash; press PB2 to move 8 LEDs to the right; press PB3 to move 8 LEDs to the left. The delay is 0.1S.

Source code:

ORG 0

MOV P2, #0FFH

LOOP: JNB P2.0, LOOP_1

JNB P2.1, LOOP_2

JNB P2.2, LOOP_3

JMP LOOP

LOOP_1: MOV R0, #2

LOOP_1_1: MOV A, #10101010B

MOV P0,A

CALL D100MS

MOV A, #01010101B

MOV P0,A

CALL D100MS

MOV P0, #11111111B

DJNZ R0, LOOP_1_1

LOOP_1_2: JB P2.0, LOOP

JMP LOOP_1_2

LOOP_2: MOV A, #11111110B

MOV R0, #8

LOOP_2_1: MOV P0,A

RL A

CALL D100MS

DJNZ R0, LOOP_2_1

MOV P0, #11111111B

LOOP_2_2: JB P2.1, LOOP

JMP LOOP_2_2

LOOP_3: MOV A, #01111111B

MOV R0, #8

LOOP_3_1: MOV P0,A

RR A

CALL D100MS

DJNZ R0, LOOP_3_1

MOV P0, #11111111B

LOOP_3_2: JB P2.2, LOOP

JMP LOOP_3_2

D100MS: MOV R7, #250

D1: MOV R6, #200

DJNZ R6, $

DJNZ R7, D1

RET

END