Điều khiển led đơn dùng IC 74HC595 + IC AT89C51

Mô phỏng 595 trên protues

Mạch nguyên lý thực tế hoạt động

ORG 00H
MAIN:
CALL CTA;goi chuong trinh con
CALL CTB
CALL CTC
JMP MAIN

CTA:
;sang dan led
MOV R1,#8;quet 8 led
LAP:
SETB P2.0;thiet lap bit chan data len 1 cho led sang
CALL DELAY
SETB P2.1;tao xung mo cho bit vao chan SH
CALL DELAY
CLR  P2.1;tao xung dong khong cho bit vao chan SH
CALL DELAY
SETB P2.2;tao xung mo ST cho bit xuat ra cac chan led
CALL DELAY
CLR  P2.2;tao xung dong ST khong cho bit xuat ra cac chan led
CALL DELAY
DJNZ R1,LAP

;tat dan led
MOV R1,#8
LAP1:
CLR P2.0;thiet lap bit chan data len 1 cho led sang
CALL DELAY
SETB P2.1
CALL DELAY
CLR  P2.1
CALL DELAY
SETB P2.2
CALL DELAY
CLR  P2.2
CALL DELAY
DJNZ R1,LAP1
RET

CTB:;sang 1 led chay
MOV R4,#3
NHAY:
SETB P2.0
CALL DELAY
SETB P2.1
CALL DELAY
CLR P2.1
SETB P2.2
CALL DELAY
CLR P2.2
CALL DELAY
MOV R1,#7
LAP2:
CLR P2.0
SETB P2.1
CLR P2.1
SETB P2.2
CLR P2.2
CALL DELAY
CALL DELAY
DJNZ R1,LAP2
DJNZ R4,NHAY
RET

CTC:;sang nhap nhay led
MOV R4,#3
NHAY1:
MOV R1,#8
LAP3:
SETB P2.0
SETB P2.1
CLR P2.1
DJNZ R1,LAP3
SETB P2.2
CLR P2.2
CALL DELAY

MOV R1,#8
LAP4:
CLR P2.0
SETB P2.1
CLR P2.1
DJNZ R1,LAP4
SETB P2.2
CLR P2.2
CALL DELAY
DJNZ R4,NHAY1
RET



DELAY:;chuong trinh tao tre
MOV R0,#200
LOOP:
MOV R2,#200
LOOP1:
DJNZ R2,LOOP1
DJNZ R0,LOOP
RET
END

Sơ đồ mô phỏng + Sơ đồ nguyên lý + File Code Asm + file hex nạp chip

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