Ho Ten: Dinh Van Chung "nguon forumspk"

Ho Ten: Dinh Van Chung
Mssv:05112005
Email:vamchieu@yahoo.com
Dt:01269449400
De Tai: Chay Chu Tren Led Ma Tran
Thuc Hien:
Dung
4 led ma tran 8x8 de tao thanh 1 led 32x8.De quet cac cot led ta su
dung IC 74LS138 la IC giai ma 3 sang 8.Nhu vay ta can 1 port de dua vao
IC 74LS138 de chon IC quet va chon cot quet.Va 1port de dua du lieu ra
4 led.
Tai moi thoi diem chi co 1 cot duoc quet nen cac Ic 74LS 138
khong dong thoi hoat dong ma moi thoi diem chi cho phep 1IC hoat
dong.Ta noi port2 voi cac IC 74LS138,port1 xuat du lieu tu VDK ra cac
ma tran led thong qua IC dem 74LS373.
Ta thuc hien de tai tren voi truong hop tao chu: Dinh Van Chung
Mo phong proteus:

File Proteus:
file
so do nguyen ly:

so do mach in:

Link download so do mach nguyen ly va mach in:
machmatrix

CODE
ORG 0000H
MOV DPTR,#chung_can
LOOP: MOV R2,#0 ;BOÄ ÑEÁM DÒCH
LOOP2: MOV R5,#78 ;SOÁ LAÀN QUEÙT TAÏO DELAY
LOOP1: MOV R0,#0 ;MAÕ QUEÙT HAØNG
MOV R1,#0 ;MAÕ QUEÙT COÄT
LOOP3: MOV A,R1
MOV P2,A ;XUAÁT MAÕ QUEÙT COÄT
MOV A,R0
ADD A,R2
MOVC A,@A+DPTR ;TRA BAÛNG
MOV P1,A ;XUAÁT MAÕ QUEÙT HAØNG
CALL DELAY1
INC R0
INC R1
CJNE R1,#32,LOOP3
DJNZ R5,LOOP1
INC R2
CJNE R2,#96,LOOP2
LJMP LOOP
chung_can:
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0

DB 0FFH,81H,81H,81H,7EH,0H,0H,0H ;chu D
db 00h,00h
DB 81H,81H,0FFH,81H,81H,0H,0H,0H ;chu I
db 00h,00h
DB 0FFH,40H,20H,10H,0FFH,0H,0H,0H ; chu N
db 00h,00h
DB 0FFH,10H,10H,10H,0FFH,0H,0H,0H ; chu H
db 00h,00h
DB 0FCH,2H,1H,2H,0FCH,0H,0H,0H ;chu V
db 00h,00h
DB 3FH,48H,88H,48H,3FH,0H,0H,0H ;chu A
db 00h,00h
DB 0FFH,40H,20H,10H,0FFH,0H,0H,0H ;chu N
db 00h,00h
DB 7EH,81H,81H,81H,81H,0H,0H,0H ;chu C
db 00h,00h
DB 0FFH,10H,10H,10H,0FFH,0H,0H,0H ;chu H
db 00h,00h
DB 0FEH,1H,1H,2H,0FFH,0H,0H,0H ;chu U
db 00h,00h
DB 0FFH,40H,20H,10H,0FFH,0H,0H,0H ;chu N
db 00h,00h
DB 7EH,81H,81H,89H,8FH,8H,0H,0H ;chu G
db 00h,00h

DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
DELAY1: MOV TMOD,#02H
MOV TH0,#(-200)
SETB TR0
JNB TF0,$
CLR TF0
RET
END


Luu do:

Download File powerpoint:
machmatrix
Mach phan cung:


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