9 Bai Thuc Hanh V5.1

7/23/2019 9 Bai Thuc Hanh V5.1

1/15

B mn H thng nhngKhoa CNTT HBK Nng

10/22/2012Khoa CNTT -H BKN - Ver 5 1


2/15

bi: Vit chng trnh nhpnhy LED Port 1 vi tn s 1Hz

Hng dn: Nhp nhy vi tn s 1Hz ngha l chu

k

t = 1/1Hz = 1s

Mun led nhp nhy th n stt trong chu k v sng trong chu k cn

li.

KQ: NHAP_NHAY_LED_P1.a51

210/22/2012Khoa CNTT -H BKN - Ver 5


3/15

bi: Vit chng trnh hin thn giao thngbng vic iu khin 3 n led tng trng bngvng FOR ( mi n l mt bit t P1.0 n P1.2)

Hng dn: Da vo chng trnh delay 1/2s vit trc . Kt hp

vng FOR lp li tr hon theo mun. Lp li quy trnh sau iu khin n:

Bt n xanh 3S

Bt n vng 1s

Bt n 4S



4/15

bi: Vit chng trnh hin thlp li t 0 n 9 trn 1 led 7thanh Port2.

Hng dn: Dng mt bin m n t 0 n 9.

Dng bng tra chuyn s cabin m tngng sang m led 7on

Hin th m ca bin m tngng ra led 7 on

Lu nh hnh bn

Kq: DEM_0_DEN_9.a51



5/15


6/15

CTC iu chnh R0 tng 1 n v sau mi ln gi gii hn t 0n 9

DC_R0:

CJNE R0,#9,TANG_R0

MOV R0,#0LJMP EXIT_DC_R0

TANG_R0:

INC R0

EXIT_DC_R0:

RET



7/15

bi: Xem xt nt no cbmtrong 3 nt P2.4, P2.5, P2.6

Hinth ln ntngng PORT0l:

P0.0, P0.1, P0.2Hng dn

KQ: DOC_4_PHIM.a51BT: Vit y 4 phmBT: Vit chung vui hc



8/15

MOV P1,#00HLOOP:

JB P2.4,TAT_LED_0

CLR P0.0

JMP PHIM_1

TAT_LED_0:

SETB P0.0

;---------

PHIM_1:

JB P2.5,TAT_LED_1CLR P0.1

JMP PHIM_2

TAT_LED_1:

SETB P0.1

;--------

PHIM_2:

JB P2.6,TAT_LED_2

CLR P0.2

JMP EXIT

TAT_LED_2:

SETB P0.2

EXIT:

JMP LOOP



9/15

bi: Dng Timer0 nhp nhy n led vitns 0. 5Hz

Hngdn: Tns 0.5Hz ngha l chu k:

t = 2s

Ngha l ns sng 1s, tt 1s v lpli Thi gian tr cho mt chu k my l 1uS

=> ton = toff= 1s=1,000,000us= 200*5000us

Chns chu k my timerm 1 vng l:5000 chu k

Timercnlpli 1s:1,000,000us/5,000 = 200 ln

i 5000us cho ta: TH0 = ECh ; TL0 = 78h



10/15

MOV TMOD,#00000001B ; TRONG CTC KHOI TAO;------------------------------------

LOOP_1S:

MOV 35H,#200 ;BO DINH THOI 0 CHAY 200 LAN

LOOP_1:

MOV TH0,#0ECH ;NAP GIA TRI ECh VAO TH0

MOV TL0,#78H ;NAP GIA TRI 78H VAO TL0SETB TR0 ;BAT BO DINH THOI

JNB TF0,$ ;CHO CO TRAN

CLR TR0 ;DUNG BO DINH THOI

CLR TF0 ;XOA CO TRAN

DJNZ 35H,LOOP_1 ;NAP LAI BO DINH THOI

CPL P1.0 ;LAM BU BIT P1.0

LJMP LOOP_1S

KQ: TIMER0_DELAY_1S.A51



11/15

bi: mslnbm nt btbngchcnngmskinca timer0; xut ra dngnh phn Port 1

Hngdn: Ta ssdng bit CT=1 kch hotchcnngmskin

ca Timer0. Lu np gi trkhing cho TH,TL =0 ngay t ban u

m dng. KQ: TIMER_0_DEM.a51



12/15

bi: to xung vung 1Hz trn chn P1.7 dngngt timer1. Trong khi vn duy tr cng vicxem phm no trong port 3 (t P3.2 n P3.5)c bm v hin th ln bit tngng P1.

Hngdn: Dng timer ch 16 bit vbinmslnngttoctns 1 Hz v tnstithiuca Timer l 6.5Hz

Taphi dng ngtca timer v vicnhp nhy led l viclpli lintc v khngb gin on vbtc l do no.

Ntbm v hinth Led tngtnh bi thc hnh 4. KQ: DOC_PHIM_TAO_XUNG.a51



13/15

bi: Vitchng trnh hinth ln 1 led 7 thanh (Port 2 ) lp lit 0 n 9 v quay v 0. Mi 1s sthay imtnv, dng ngt Timer 0.

Hngdn: Dng ngt timer vbinmslnngt xc nhthi gian

1s thay ibinm. Chng trnh iuchnh v hinth ln led 7 thanh tngt

bi thc hnh s 3 Kq: DEM_DEN_9_NGAT.a51



14/15

bi: Thc hin 2 nhim v trong mtchng trnh: Ngt INT0 ngt theo sn, nu c ngt th sng

Port1 trong 1s; INT1 ngt theo mc, nu c ngt

th sng Port1. Hin thm ln n 9 trn 1 led 7 ( Port 2 ) thanh

dng delay.



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9 Bai Thuc Hanh V5.1