Do an Tot Nghiep - RF Controller

8/6/2019 Do an Tot Nghiep - RF Controller

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BI THI CUI KHA REMOTE CONTROLLER

GVHD : Nguyn Duy Nht Vin 1 SVTH: Nguyn Vn Minh

AI HC NNG CNG HO X HI CH NGHA VIT NAM

CAO NG CNG NGH C LP - T DO - HNH PHCKHOA IN

BI THI CUI KHA

H v tn sinh vin : NGUYN VN MINHLp : 02T2

Chuyn nghnh : IN T

1. ti : iu khin t xa bng remote Tivi SONY ( Bng tia hng ngoi )

2. Ni dung cc phn thuyt minh :

- Phn l thuyt : Tng quan v l thuyt.

- Phn thit k : S nguyn l v hot ng ca mch.

- Phn thi cng : Cc bc tin hnh thi cng v hon thinmch.

3. Cc bn v :

-

-

4. Cn b hng dn : NGUYN DUY NHT VIN

5. Ngy nhn n : Ngy .......... thng ......... nm 2005.

6. Ngy np n : Ngy........... thng.......... nm 2005.

Thng qua Khoa


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Ngy .....thng ......nm 2005.

Ch nhim khoa Cn b hng d n(k v ghi r h v tn) (k v ghi r h v tn)

Nng, ngy ...... thng ...... nm 2004.

Ch tch Hi ng

Kt qu im nh gi : ______

AI HC NNG CNG HO X HI CH NGHA VIT NAM

CAO NG CNG NGH C LP - T DO - HNH PHC

KHOA IN


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NHN XT & NH GI

BI THI CUI KHA

H v tn sinh vin : NGUYN VN MINH

Lp : 02T2

Chuyn nghnh : IN T

ti : iu khin t xa bng remote Tivi SONY ( Bng tia hng ngoi )

1. H v tn cn b hng dn : NGUYN DUY NHT VIN

Nhn xt ca cn b hng dn :

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Kt qu im nh gi : _____

Cn b hng dn

(k tn)


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Nhn xt ca cn b phn bin :

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Cn b phn bin

(k tn)


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Li Ni u

oOo-=o=--==--o[]\/[][][]\[][]-[]o--==-o-==-oOo

Trong thi i ngy nay cng ngh in t v ang pht trin rt

mnh m. S ra i ca cc vi mch tng hp c kh nng lp trnh cao

em li rt nhiu thun tin cho vic thit k cc mch iu khin i hi s

chnh xc v phc tp cao.

Ngnh cng nghip in t v ang d n u trong mi lnh vc. Tt

c cc ngnh nh in c, y khoa, c kh, gii tr ...u da vo cc thnh

tu ca in t ng dng ring cho mi ngnh.

Nhu cu sinh hot ca mi ngi ngy cng cao, c nhng ci trcy tng chng l khng th nhng by gi vi s pht trin ca cng

ngh in t, hu ht nhng c m dn tr thnh hin thc.

Mt hm ang ngi xem phim, bng a chu gi ca em nm chic

iu khin t xa ca ti vi ch khp ni va nhn nt va ni m ca, ng

ca, bt qut tt qut, bt n tt n... sau x mt xung nhn em: cu

i, c g mi th u c th iu khin t xa th hay bit chng no cu ha!... v em t hi ti sao mnh li khng lm cho c m ca chu mnh

thnh hin thc nh? N nm trong kh nng ca mnh m ! ... c ng v l do


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m em chn ti tt nghip ln ny l iu khin cc thit b in t

xa bng remote ti vi.

Ni dung chnh ca n ny l trnh by cc bc tin hnh thit

k mch thu v gii m tn hiu pht t remote tivi Sony v t ng dng

vo iu khin t xa cc thit b in nh qut my, n ng, my bm, ca

in,... bng remote ca tivi Sony.

Ni dung ca n gm cc phn

Phn I : C S L THUYT

Chng I : Gii thiu v vi iu khin AT89C51

Chng II : Gii thiu v b thu v pht hng ngoi

Chng III : Gii thiu v giao thc ca remote Sony

Phn II : TIN HNH THIT K MCH THC T

Chng IV : ng dng c s l thuyt vo thit k mch iu

khin t xa

Chng V : Hng d n s dng mch


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Trong thi gian thc hin ti, em nhn c s gi p tn tnh ca

cc bn sinh vin, ca qu thy c thuc B mn in t trng Cao ng

CngNgh. Em mun by t lng bit n su sc nht ca mnh n cc

bn, n qu thy c. c bit, chn thnh c m n thy Nguyn Duy Nht

Vin tn tnh gi i p cc khut mc ca em trong l c lm ti ny.

Mc du rt c gng trong qu trnh hon thnh bi thi nhng do trnh

cn hn ch v thi gian hn hp, ti khng th trnh khi nhng

thiu st. Knh mong s thng c m v ng gp kin ca qu thy c cng

cc bn sinh vin.

Nng, ngy......thng......nm 2005.

Sinh vin thc hin

Nguyn Vn Minh


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MC LC

Li ni u ....................................................................................................3

PHN I C S L THUYT

CHNG I GII THIU V VI IU KHIN AT89C51

I.1.M u ....................... ................................................................. .............9

I.2.M t .......................................................................................................9I.2.1.Thng s k thut ............................................................................9

I.2.2. Chc nng cc chn ca uC AT89C51 ......................... ................9

I.3.Input/Output .......................................................... ................................ .13

I.4.TIMER .................. ...................................................................... ...........15

I.4.1.Timer modes ( TMOD ) register ....................................................15

I.4.2.TCON ......................................................................................... ...18

I.4.3.Lm th no s dng Timer? ....................................................18

I.5.Cc ngt ca AT89C51 .........................................................................19

I.5.1. Cch vit hm ngt trong C ...............................................................19

I.5.2. Timer interrupt ( ngt thi gian ) ........................................................20

I.5.3. External Interrupt ( ngt ngoi ) .........................................................21

I.6. Kt thc chng ....................... ............................... ..............................21

CHNG II GII THIU V B THU PHT HNG NGOI

II.1.M u .......................... ................................ ............................. ...........23

II.2.Hng ngoi (InfraRED) l g? ........................ ................................. .......23


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II.3.ng dng ca hng ngoi trong in t.................................................23

II.4.Kt th c chng ....................................................................................26

CHNG III GII THIU V GIAO THC CA REMOTE TIVI SONY

III.1.M u ......................... ............................... .............................. ...........28

III.2.K thut iu khin t xa c bit ca SONY ......................................28

III.3.Thut ton gi i m tn hiu hng ngoi pht t remote SONY.............29

III.4.Kt th c chng ...................................................................................31

PHN II TIN HNH THIT K MCH THC T

CHNG IV NG DNG VO THIT K MCH IU KHIN T XA

IV.1.M u ................................................................................................34

IV.2.Phn cng .......................................................... ................................ .34IV.2.1.Mch ng dng ca uC AT89C51 ....................................................34

IV.2.2.Mch iu khin Rle .......................................................................34

IV.2.3.Kt ni mt nhn hng ngoi vi uC AT89C51.................................37

IV.3.Phn mm ...................... .................................... ................................ .37

IV.4.Kt th c chng ..................................................................................42

CHNG V HNG DN S DNG MCH

V.1.M u .................................................................................................44

V.2.Cc chc nng ca mch .....................................................................44


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V.3.Cch s dng ....................... ................................... .............................44

V.4.Kt th c chng ...................................................................................44

........................................................................................................................

HNG PHT TRIN CA TI ..............................................................45

TI LIU THAM KHO ........................ ............................... .........................49


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PHN I

C S L THUYT


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CHNG I

GII THIU V VI IU KHIN AT89C51


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CHNG I

GII THIU S LC V VI IU KHINAT89C51

I.1 . M U:

Trong chng ny vit v cc c trng v phn cng ca vi iu

khin AT89C51, t c ci nhn khi qut v phn cng ca vi iu

khin, t lm c s lp trnh cc ng dng cho n.

Lu : Cc v d s dng trong cc chng u vit bng ngn ng C

I.2. M t:

I.2.1.Thng s k thut :

- Tng thch vi dng sn phm MCS-51TM

- 4K byte b nh Flash lp trnh li c

(Khong chng 1000 ln)

- Fully Static Operation: 0 Hz to 24MHz

- 3 mc kha b nh chng trnh

- 128 x 8bit RAM

- 32 ng xut nhp lp trnh c

- Hai b nh thi / m 16 bit,

- 5 ngun ngt

- Knh ni tip lp trnh c

- C ch tit kim nng lng


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I.2.2.Chc nng cc chn ca uC AT89C51:

VCC

Cung cp in p

GND

Ni t

Port 0

L cng nhp/xut 8-bit, khng c in tr pullup. i vi cc thit k c ln

( c s dng b nh m rng ) n c kt hp knh gia cc bus. Cc

chn ca cng c k hiu P0.0, P0.1... P0.7.

Port1

Port 1 l cng nhp/xut 8-bit c in tr pullup bn trong. Cc chn ca

cng c k hiu P1.0, P1.1, P1.2 P1.7 c th dng cho cc thit b

ngoi nu cn. Port 1 khng c chc nng khc, v vy ch ng ta ch c

dng trong giao tip vi cc thit b ngoi.

Port2


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Port 2 l mt cng nhp/xut 8-bit c in tr pullup bn trong, c dng

nh cc ng xut nhp hoc l byte cao ca bus a ch i vi cc thit

k c dng b nh m rng.

Port3

Port 3 l mt cng xut/nhp 8-bit.

Bng I.1 Mt s chc nng trn cc chn ca Port 3

Port 3 cn c th nhn mt s tn hiu iu khin dnh cho lp trnh Flash

hoc kim tra chng trnh Flash.


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RST

Khi ng li mch uC89C51 bng cch gi mc cao chn ny t nht hai

vng my sau chuyn li mc thp.

Hnh - Mch Reset h thng

ALE/PROG (Address Latch Enable/Program pulse input)

To xung ra cht a ch byte thp ca a ch trong sut qu trnh truy

cp b nh ngoi. Chn ny cng l chn nhn xung lp trnh trong qu trnh

lp trnh Flash.

Cc xung tn hiu ALE c tc bng 1/6 ln tn s dao ng trn chip v

c th c dng l ngun xung nhp cho cc h thng. Nu xung trn 8951

l 12MHz th ALE c tn s 2MHz. Ch ngoi tr khi thi hnh lnh MOVX,


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mt xung ALE s b mt. Chn ny cng c lm ng vo cho xung lp trnh

cho EPROM trong 89C51.

PSEN (Program Store Enable)

PSEN l tn hiu ra trn chn 29. N l tn hiu iu khin cho php b

nh chng trnh m rng v thng c ni n chn OE (Output Enable)

ca mt EPROM cho php c cc bytes m lnh.

PSEN s mc thp trong thi gian ly lnh. Cc m nh phn ca

chng trnh c c t EPROM qua bus v c cht vo thanh ghi lnh

ca 8951 gii m lnh. Khi thi hnh chng trnh trong ROM ni (8951)

PSEN s mc th ng (mc cao).

EA/VPP (External Access Enable)

Tn hiu vo EA trn chn 31 thng c mc ln mc cao (+5V) hoc

mc thp (GND). Nu mc cao, 89C51 thi hnh chng trnh t ROM ni

trong khong a ch thp (4K/8K). Nu mc thp, chng trnh ch c

thi hnh t b nh m rng. Nu EA c ni mc thp b nh bn trong


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chng trnh 89C51 s b cm v chng trnh thi hnh t EPROM m rng.

Ngi ta cn dng chn EA lm chn cp in p 12V khi lp trnh cho

EPROM trong 89C51.

XTAL1

Ng vo o ca b dao ng thch anh n b nh thi bn trong

mch hot ng.

XTAL2

Ng ra o ca b khuch i dao ng thch anh.

Cch kt ni b dao ng thch anh vi uC 89C51

Ghi ch: C1, C2 = 30 pF 10 pF


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I.3. Input / Output:

iu khin cc cng ca uC89C51 bn cn phi xem xt cc mc

logic TTL. Logic TTL c 2 mc : Mc cao (1) v mc thp (0). p v dng

hai mc nh sau:

Mc p Dng

Cao Trn 2,4 V Thc t hu nh khng c dng chy qua

Thp Di 0,9V 1,6mA chy v mass (ty thuc vo cch mc)

Input:

Mt s mch duy tr dng v p cc Pin ca cng ch INPUT

lm vic c:

Lun lun tt nht l mc cng tc vi mass v mt in tr hn dng nh

mch Good(tt). Khi cng tt h, in tr 10K s cung cp mt dng rt


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nh cho duy tr mc logic 1. Khi ng cng tc, pin (chn) ca cng s

ni tt vi mass, in p pin l c ny s l 0V chuyn sang mc logic 0.

mch Fair (tm c), cn n mt in tr rt b dp mass. Nu khng

th pin s tng ln hn 0,9V . Khi ng cng tt, mch s lng ph mt lng

dng rt ln cho n khi khng cn dng qua pin na. Mch ch mang li

thun li duy nht l khi ng cng tc th s mang li mc logic 1.

mch Poor (km), mc logic 1 s n nh khi ng cng tc. Nhng khi

cng tc h, mch vo s b nhiu v s l lng trng thi mc cao hn l

mc thp. Mt chn TTL h thng mc logic 1 nhng s d b nhiu.

Kt lun, iu khin mt u vo TTL th nn lun cn nhc xem xt

dng ch y vo (ghim u vo 0V)

Output


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i vi u ra TTL th ch ng rt tt cho vic hn dng, nhng km v vic

thc hin chc nng cung cp ngun. Mt TTL thng thng c th dng

ln 1,6mA khi u ra mc thp v khi thc hin chc nng l ngun cung

cp (u ra mc cao) th ch 250uA. Pin ca cc cng trong uC89C51 c

th dng ln 1,6mA (3,2mA i vi Port 0) khi u ra mc thp v khi u

ra mc cao th ch 60uA. V vy, khi iu khin bn nn chn mc tch cc

ca u ra l mc thp.

r rng hn v sao ta nn chn mc logic 0 lm mc tch cc ta xem cc

v d sau:

LED

Khng nh diode, Led (diode quang) t lu in p s dng phn thnh

cc loi t 1,7 n 2,5 Volts v hu ht ch ng u hot ng dng 20mA.


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Trong mch Poor (km), th u ra TTL khng th to dng ra trn 1mA, v

vy LED s sng rt m.

Trong mch Fair (tm c), th in p trn Led khong 2V cn li 3V s

ri vo mch TTL, iu ny d n n lng ln ngun b hao ph trong TTL

hoc Led s hng.

Trong mch Good (tt), th mch c in tr hn dng. in tr hn dng

ny c th tnh da vo in p ri trn Led l 2,5V v ng ra TTL l 0,9V.in tr hn dng khng nn b hn 100 Ohm nu khng th Led c th s

hng.

I.4.TIMER( B nh thi )

Trong uC89C51 c trang b 2 b nh thi 16 bit, c hai u c th c

iu khin, thit lp, c, t ch ring l. Cc gi tr nh phn ca b


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nh thi c lu tr trong 2 thanh ghi THx v TLx , x c th l 0 hoc mt

tng ng vi b nh thi 0 ( Timer 0 ) hoc b nh thi 1 ( Timer 1 ) , THx

cha gi tr ca 8 bit cao, TLx cha gi tr ca 8 bit thp, v d gi tr ca b

nh thi hin ti l 0x1234 th THx gi gi tr 0x12 v TLx gi gi tr 0x34.

Timer m nh th no?

Rt n gin, cu tr li l timer lun lun c m ln m khng

cn bit timer ang c dng nh b o thi gian, m s kin, hay to

tc baud: Timer th lun lun c tng ln bi vi iu khin.

I.4.1.Timer modes ( TMOD ) register ( Thanh ghi ch ca b nh thi )

B nh thi c 3 ng dng chung l:

1 . o th i g ian

2. m s k i n t rong khong t h i g ian

3. To tc Baud cho cng n i t i p

Thit lp ch lm vic ca b nh thi:

Formatted: Tab stops: 2 .64", Left


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Ty theo gi tr ca thanh ghi TMOD m b nh thi s hot ng

nhng ch khc nhau. C th, thit lp ch lm vic ca b nh

thi ta da vo bng sau.


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Bit Name Timer M t

7 Gate 1 Gate Bit

0 : Timer chy khi bin TR0 (TR1) c thit lp

bng 1

1 : Timer ch chy khi INTx mc cao v TRx

c thit lp bng 1

6 C/T 1 0 : Ch ng h. m ln bng xung nhp

thch anh

1 : Ch m. m ln bng xung vo chn

TXx. Ch mc thp hay cao ca xung vo phi

t nht l 1ms, tn s ln nht l 500KHz

5 M1 1 Mode bit 1 (xem bng tip theo)

4 M0 1 Mode bit 0 (xem bng tip theo)

3 Gate 0 Bit Gate ca Timer 0

2 C/T 0 Bit C/T ca Timer 0

1 M1 0 Bit M1 ca Timer 0

0 M0 0 Bit M0 ca Timer 0

Sau y l s khi th hin hot ng ca Bit Gate v Bit C/T


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Ngoi ra ch ca b nh thi hay b m c nh r bng Bit C/T nh

bng sau:

M0 M1 Mode M t

0 0 0 Ch Timer 13 bit

0 1 1 Ch Timer 16 bit

1 0 2 Ch Timer 8 bit t ng np li

1 1 3 Ch tch thi gian

Timer 0 : TL0 l mt timer 8 bit c iu khin bi

TR0 v TH0

Timer 1 : Dng


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I.4.2.TCON thanh ghi cha ng cc bin tnh trng ca Timer x :

Symbol M t

TF1 C trn ca timer 1. Thit lp bi phn cng khi trn.

c xa bi phn cng hoc phn mm khi vi iu

khin nhy n ngt.

TR1 Bit iu khin cho Timer 1 chy. Thit lp (=1) hoc

xa(=0) iu khin timer 1 chy hoc ngng.TF0 C trn ca timer 0.

TR0 Bit iu khin cho Timer 0 chy.

Formatted: Centered


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Khi no b m ca Timer s y?B m ca b nh thi s y sau mt s lng vng my nht nh

ty thuc vo ch lm vic ca timer

Mode 0 : Timer s y sau 213 = 8192 vng lnh



Ch : Thc t 1 vng lnh thc hin trong 12 xung ca thch anh

I.4.3.Lm th no s dng Timer?

Cc bc nh sau:

1. Thit lp ch lm vic ca b nh thi (TMOD)

2. Thit lp s m ban u (THx v TLx)

3. Thit lp Bit iu khin b nh thi chy(TRx). Sau khi thit lp ( gn

TRx = 1) b nh thi s chy v m ln cho n khi n trn

4. Sau khi b nh thi b trn, bin TFx s c thit lp (TFx =1). N

nn c xa ( gn TFx = 0 ) cho ln s dng tip theo.


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V d: Chng trnh n nhy mi 5ms nh sau (ng vi thch anh 12MHz)

#include

#define LED P0_1

main() {

TMOD = 0x00; // TIMER0 Mode 0

while (1) {

TH0 = (8192 - 5000) / 32; // 5ms

TL0 = (8192 - 5000) % 32;

TR0 = 1; // Khi ng b nh thi

while (!TF0) ; // Ch cho n khi b nh thi trn

TR0 = 0; // stop timer

TF0 = 0; // clear timer overlow flag

LED = !LED;

}}


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I.5.Cc ngt ca AT89C51:

AT89C51 c 5 ngt:

- Serial interrupt

- Timer 1 interrupt

- External 1 interrupt

- Timer 0 interrupt

- External 0 interrupt

I.5.1. Cch vit hm ngt trong C:

Void function_name () interrupt [using register bank]

{

...

}

// Hm ny s c gi khi c ngt s


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Interrupt Number M t ngt Name

0 EXTERNAL INT 0 EX0

1 TIMER/COUNTER 0 ET0

2 EXTERNAL INT 1 EX1

3 TIMER/COUNTER 1 ET1

4 SERIAL PORT ES

Lu : hm ngt c gi th trong hm main phi gn bin cho

php ngt bng 1 ( EA = 1) ng thi gn bin c tn ca ngt tng

ng bng 1. V d cho php ngt timer0 th phi gn EA = 1 v

ET0 = 1.

I.5.2. Timer interrupt ( ngt thi gian )

Ngt thi gian xy ra khi c trn c thit lp (bin TFx=1). Sau khi

thc hin ngt c trn s t ng c xa (TFx = 0).

V d: Chng trnh s dng ngt thi gian nh sau s lm o bit 0

ca Port 1 mi khi b m thi gian ca timer 0 y.


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#include

void timer0_interrupt() interrupt 1

{

P1_0 = ! P1_0;

}

void main()

{

EA = 1;


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I.5.3. External Interrupt ( ngt ngoi )

Ngt ngoi xy ra khi t vo mt mc thp hoc mt sn xung

trn chn INT0(P3.2) hoc INT1(P3.3) ca vi iu khin.

Ch ngt bng sn xung hoc ngt bng mc thp c thit lp

bng cch gn bin ITx bng 0 hay bng 1

ITx = 0 : Ngt ngoi c tc ng bng mc thp chn INTx

ITx = 1 : Ngt ngoi c tc ng bng sn xung chn INTx

(x = 0 hoc 1 tng ng ch nh INT0 hay INT 1)

Nu ngt ngoi c tc ng bng mc thp th ch nn t mc thp

trong khong thi gian thc hin cc lnh khi ngt thi v thi tc

ng mc thp trc khi vi iu khin thc hin ht cc lnh trong hm ngt,

nu sau khi thc hin ht cc lnh ca ngt m mc thp v n cn t

chn INTx th mt ngt khc s tip tc thc hin.

Nu ngt ngoi bng sn xung th chn INTx phi gi chu k cao

t nht mt chu k my ri mi chuyn sang mc thp mt chu k my na

m bo rng vi iu khin pht hin c sn xung.


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CHNG II

GII THIU V


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CHNG II

GII THIU V B THU PHT HNG NGOI

II.1.M u:

Trong chng ny vit v nguyn l hot ng ca b thu v pht

hng ngoi s cho ta bit mt nhn hng ngoi chn lc tn hiu hng ngoi

thu c da trn c s no. T lm c s ng dng vo thit k

mch nhn v gii m hng ngoi pht ra t remote.

II.2. Hng ngoi (InfraRED) l g?

Hng ngoi l mt s bc x nng lng vi tn s m mt ngi khng th

cm nhn c, v vy chng ta khng th nhn thy c hng ngoi. Tuy

nhin chng ta v n c th nhn thy c n bng cch dng camera

quay li, trong hnh nh quay c chng ta s thy c s c mt ca

hng ngoi.

Vng c th nhn thy c


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Hnh chp t my in thoi di ng NOKIA 7610

II.3.ng dng ca hng ngoi trong in t

Hng ngoi rt th v, bi n c to ra rt d dng m khng h chu nh

hng nhiu ca mt tn hiu in t no c . V vy n rt c a dng

trong vic truyn t thng tin v iu khin. Nhng bn cnh u im li

c mt nhc im l mt s ngun sng khc cng c bao gm hng

ngoi trong v cc ngun sng c th gy tr ngi rt ln trong vic

truyn tin. Mt tri l v d in hnh, t lu, n ta ra bc x vi ph rt

rng.


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C rt nhiu th c th to ra hng ngoi, vt g ta ra nhit, bao gm c c

th ca chng ta, n bn, ci l, s ma st gia hai bn tay vi nhau, cng

nh nc nng t vi... u c th to ra hng ngoi.

vic truyn tn hiu bng hng ngoi c tt hn v loi tr nhng tn

hiu gi , mt nhu cu cp thit c ra l cn c mt cha kha

cho b thu hng ngoi bit tn hiu no l tn hiu thc s cn nhn v ci

g l tn hiu gi. Ging nh s dng php loi suy, vo ban m, khi nhn

ln tri cao chng ta nhn thy hng trm ngi sao nhng chng ta v n c

th nhn ra nh sng ca mt chic my bay t xa mt cch d dng bi v

nh sng pht ra t my bay c nhp nhy. S nhp nhy ca nh sng

ni my bay chnh l chic cha kha, l m bo cho ta bit.

Tng t nh chic my bay trong mt bu tri m y sao , trong

phng xem TIVI ca chng ta c l cng c rt nhiu ngun pht hng ngoi

nh c th ca chng ta, tch tr nng, cng nh nhng bng n xung

quanh phng. Mt cch trnh tt c nhng ngun pht hng ngoi gi


41/78



chnh l to ra mt cha kha ging nh s nhp nhy ca nh n my

bay, chnh l dng s nhp nhy ca hng ngoi vi mt tn s nht

nh. b thu hng ngoi trong TV hay my nghe nhc... s ch c tc ng

tch cc i vi nhng nh sng hng ngoi nhp nhy vi tn s nht nh

. Tn s tt nht dng cho vic ny l khong t 30kHz n 60kHz,

thng thng hay dng tn s gn 36kHz.

Do vy, remote s dng

xung pht hng ngoi vi

tn s khong 36kHz

hoc ln cn truyn

thng tin. Tia hng ngoi

s c pht bi Led hng ngoi 36000 ln mt giy. mt nhn hng

ngoi, khi nhn c hng ngoi pht t Led hng ngoi vi tn s 36kHz

th chn ra Vout s chuyn sang mc tch cc.(Thng thng mc tch cc

chn ra Vout ca mt thu l mc thp). Khi khng cn nhn c hng


42/78



ngoi vi tn s 36kHz hoc c nhn c nhng vi tn s qu thp hoc

qu cao so vi 36kHz th chn Vout ca mt nhn lun bng Vcc.

S chn ca mt thu hng ngoi series TSOP17xx

Thng s k thut:

- Mc ra tch cc mc thp

- Vs = - 0,3 .. 6 V

- Is = 5 mA

- Vo = -0,3 .. 6 V

- Io = 5 mA

S khi ca b thu hng ngoi series TSOP17xx


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Mch ng dng

II.4.Kt th c chng:


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Qua chng ny, ta phn no nm c nguyn tt hot ng

ca b pht v mt thu hng ngoi c chn lc tn s l nh th no.


45/78



CHNG III

GII THIU V


46/78



GIAO THC CA REMOTE TIVI SONY


47/78



CHNG III

GIAO THC CA REMOTE TIVI SONY

III.1.M U:

Trong chng ny vit v giao thc truyn tn hiu iu khin ca

Remote SONY t r t ra c cch lp trnh gi i m nhng tn hiu

v ng dng vo lp trnh cho mch iu khin t xa.

III.2. K thut iu khin t xa c bit ca SONY:

SONY dng giao thc di xung ra. y l mt trong nhng giao

thc rt n gi n hiu v gi i m n.

t T = 600 micro giy

Mi bit c truyn i t Remote SONY s c gii m l bit 0 nu

thi gian tn ti mc logic 0 = T v mc logic 1 = T, v nu mc logic 0 = T

sau mc logic 1 tn ti trong thi gian 2T th s c gii m l bit 1.


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Trong thc t dng sng Remote SONY pht ra nh sau:

Mi n t lnh s c m ha theo gi n sau

- Trc ht l mt xung ng b (Start bit), xung ng b ny c

rng xung bng 3T (1800 micro giy)

- K theo xung ng b l 12 bit khc nhau c quy c nh sau Bit 0 : 500 us + 700 us mc cao

Bit 1 : 500 us + 1300 us mc cao


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bit c pht ra u tin sau Start bit l bit c trng s thp nht.

Khi nhn mt lung bit nh hnh trn th u ra chn Vout ca mt nhn

c dng sng ngc li nh sau:

III.3. Thut ton gii m tn hiu hng ngoi pht t remote tivi SONY:

Sau y l thut ton gii m tn hiu ca remote ti vi SONY c th

p dng vo lp trnh cho vic gii m cho Vi iu khin hay vi x l

Hm kim tra Bit START


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Hm kim tra 12 bit tip theo, kt th c hm bin pulse s nhn c 1 gi tr

xc nh


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III.4. Kt th c chng:

Qua chng ny, ch ng ta bit c giao thc truyn tn hiu ca

remote tivi SONY v thut ton kim tra , gi i m nhng tn hiu . n

y ta c y mi cng c bt tay vo lp trnh, lp rp mt mch

nhn v gi i m tn hiu ca remote tivi SONY t ng dng vo thit k

mch iu khin t xa cc thit b in bng remote tivi SONY.


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PHN IITIN HNH

THIT K MCH THC T


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CHNG IV

NG DNG VO THIT K


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MCH IU KHIN T XA


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CHNG IV

NG DNG VO THIT K MCH

IU KHIN T XA

IV.1. M u:

Trong chng ny ch ng ta i vo thit k mt mch ng dng iu

khin t xa thc t da trn c s l thuyt cc chng I, II v III.

Chng ny s chia lm hai phn:

- Phn cng

- Phn mm

IV.2. Phn cng:

Chia lm 2 phn:

- Mch ng dng ca AT89C51

- Mch iu khin rle

- Kt ni mt nhn vi uC AT89C51


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Ti Sao ta khng tch hp thnh mt mch m phi chia thnh 2 mch?

L do rt n gin l to thun li hn cho vic thit k nhng

mch ng dng khc ca AT89C51 sau ny, v mt l do na l tch bit

phn mch iu khin rle vi mch chy AT89C51 trnh trng hp

AT89C51 b nhiu bi t trng do rle sinh ra hay do tia la in cc tip

im khi chuyn mch.

IV.2.1. Mch ng dng ca AT89C51:

S nguyn l trang 29

IV.2.2. Mch iu khin rle:

S nguyn l trang 30


57/78

GVHD

:NguynD

uyNhtVin

57

SVTH:NguynVnMinh

JP312345678

R18.2k

JP0

12345678

C433pf

U1

AT89C51

91819 29

30

31

12345678

2122232425262728

1011121314151617

3938373635343332

RSTXTAL2XTAL1 PSEN

ALE/PROG

EA/VPP

P1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7

P2.0/A8P2.1/A9

P2.2/A10P2.3/A11P2.4/A12P2.5/A13P2.6/A14P2.7/A15

P3.0/RXDP3.1/TXD

P3.2/INTOP3.3/INT1

P3.4/TOP3.5/T1

P3.6/WRP3.7/RD

P0.0/AD0P0.1/AD1P0.2/AD2P0.3/AD3P0.4/AD4P0.5/AD5P0.6/AD6P0.7/AD7

VCC

VCC

J1

12

C

4.7k

1 23456789

JP112345678

C333pf

VCC

SW1

11.0592M

JP2

12345678

V

C510uf

S NGUYN L MCH NG DNG CA uC AT89C51


58/78

GVHD

:NguynD

uyNhtVin

58

SVTH:NguynVnMinh

JP1

8 H

D

R

1 2 3 4 5 6 7 8

R3 R5

Q1

C1815

1

2

3

Q6

C1815

1

2

3

R7

K3

3

5

4

1

2

Q5

C1815

1

2

3

R12 R14

R4

Q13C1815

1

2

3

J4

12V

1

2

Q12C1815

1

2

3

R15

K6

3

5

4

1

2

K2

3

5

4

1

2

JP2

8 H

D

R

1 2 3 4 5 6 7 8

K4

3

5

4

1

2

R13

K1

3

5

4

1

2

R6R2

K5

3

5

4

1

2

R11

Q3

C1815

1

2

3

Q2

C1815

1

2

3

3

1

2

R1

J1

220V

1 2

Q9

C1815

1

2

3

Q15

C18

1

2

3

R9

Q11

C1815

1

2

3

Q4

C1815

1

2

3

Q7

C18

1

Q10

C1815

1

2

3

R10

Q14C1815

1

2

3

IU KHIN RLE


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IV.2.3. Kt ni mt nhn vi uC AT89C51:

Ta kt ni theo s sau:

C1

4.

F

CC

R510k

R4

330ohm

TSOP17xx

321

U1

AT89C51

9

18

19 29

30

31

1

2

3

4

5

6

7

8

21

22

23

24

25

26

27

28

10

11

12

13

14

15

16

17

39

38

37

36

35

34

33

32

RST

XTAL2

XTAL1 PSEN

ALE/PROG

EA/

PP

P1.0

P1.1P1.2P1.3P1.4P1.5P1.6P1.7

P2.0/A8P2.1/A9

P2.2/A10P2.3/A11P2.4/A12P2.5/A13P2.6/A14P2.7/A15

P3.0/RXD

P3.1/TXDP3.2/INTOP3.3/INT1

P3.4/TOP3.5/T1

P3.6/

R

P3.7/RD

P0.0/AD0P0.1/AD1P0.2/AD2P0.3/AD3P0.4/AD4P0.5/AD5P0.6/AD6P0.7/AD7

IV.3.Phn mm:

Sau y l m ngun chng trnh thu v gii m tn hiu ca Remote

TIVI SONY c vit theo ngn ng C.

#include

#define signal P3_2

#define led P3_6


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bit quat=0,quat_save=0; //P0_0 : danh rieng cho dieu khien quat

unsigned char save=255,giothoang=0;

unsigned int i,accept;

unsigned int bdata key;

sbit key_4 = key^4;

void delay(void);

void pause(unsigned int n);

void control(void);

void external_0_interrupt(void) interrupt 0

{

i = 3;

do

{

delay();

if (signal == 1) return;


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}

while (--i);

key = 0;

i = 12;

do

{

while (signal == 0) ;


delay();

if (signal == 0)

key_4 = 1;

else

key_4 = 0;

key >>= 1;

}


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while (--i);

led = 0;

control();

pause(33000);

led = 1;

}

void main ()

{ int j;

TMOD = 0x01;

EA = 1;//Cho phep ngat

EX0 = 1;//Cho phep ngat ngoai

IT0 = 1;//Ngat ngoai tac dong bang suon xuong

while(1){

if(quat)


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if(giothoang)

{

for(j=0;j


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}

void delay(void)

{

TH0 = 253; // 750 u_second

TL0 = 77;

TR0 = 1;

while (TF0 == 0);

TR0 = 0;

TF0 = 0;

}

void pause(unsigned int n)

{

unsigned int i;

for(i=0;i


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}

//De biet ma key o dau ra thi xem phan HUONG PHAT TRIEN CUA DE

TAI

void control(void)

{

switch (key)

{

case 128: quat = !quat; accept=1; break;

case 129: P0_1 = !P0_1; accept=1; break;







case 184: {


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save = P0;

P0=255;

quat_save=quat;

quat=0;

accept=1;

break;

}

case 191: {

P0 = save;

quat = quat_save;

accept=1;

break;

}

case 149: {

P0 = 255;


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giothoang=0;

quat=0;

accept=1;

break;//power button

}

case 137: {

giothoang++;

if(giothoang>3) giothoang=0;

break;

}

default :

accept = 0;

}

if (!accept) //Neu nhan phim chua duoc lap trinh thi nhap nhay led

{


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led = 0 ;

pause(10000);

led = 1 ;

pause(10000);

led = 0 ;

pause(10000);

led = 1 ;

pause(10000);

led = 0 ;

pause(10000);

led = 1 ;

}


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}

IV.4. Kt th c chng:

Sau chng ny cho ta c ci nhn chi tit hn v lp trnh vi iu

khin, bit cch vn dng nhng g hc trong lp trnh C vo lp trnh cho

vi iu khin. Da trn cc c s l thuyt hc v c c ng dng vo

trong thc t, kim nghim nhng kin thc mnh nm bt c ng vi

thc t khng.


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CHNG V

HNG DN


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S DNG MCH


72/78



CHNG V

HNG DN S DNG MCH

V.1. M u:

Bt c mt sn phm no cng u phi c hng d n s dng, v y

l chng vit cc hng d n ca mch thit k chng IV.

V.2. Cc chc nng ca mch:

- Mch c chc nng nhn cc tn hiu pht ra t remote tivi SONY

- ng vi mi phm nhn t 1 8 l mi cng tc iu khin t xa

- Ring cng tc 1 c thit k dnh ring cho iu khin qut

V.3. Cch s dng:

- Nhn cc phm t 1 n 8 bt tt cc cng tc t 1 n 8

- Nhn phm 0 chn ch qut theo cn gi thong

+ Mi ln nhn s tng dn thi gian ngng v chy ca qut

+ Sau khi tng ln 2 ln, tc l mc th 3, nu nhn phm 0

thm mt ln na th s tt ch qut theo cn gi thong.

Cng tc 1 tr li trng thi bt tt nh cc cng tc khc.


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- Nhn phm Power tt mch (tt tt c cc cng tc ng thi), khi

nhn phm Power th mch s tt m khng lu li hin trng cc

cng tc trc khi tt.

- Nhn phm Video tt tt c cc cng tt, nhng c lu li hin

trng ca cc cng tc trc khi tt.

- Nhn phm Tivi load li hin trng ca mch trc khi nhn nt

Video. (Lu , mch v n lu li hin trng di cn gi thong cho

n khi bn thay i bng cch nhn phm 0)

V.4.Kt thc chng:

Qua chng ny ngi s dng s bit cch s dng b thu hng

ngoi c thit k CHNG IV.


74/78



HNG PHT TRIN CA TI

VCC

VCC

11.0592 4

330

33

8.3k

VCC

Q1

1015

T

O 17

321

10

F

10k

VCC

i

3

COM

U1

T89C2051

1

1213141516171819

20

236789

11

54

T

V

1.0

IN0 1.1

IN1

1.2 1.3 1.4 1.5 1.6 1.7

VCC

3.0

X! 3.1

TX!

3.2

INTO 3.3

INT1 3.4

T0 3.5

T1 3.7

XT

" 1XT

"

2

4.7k

33

C1

4.7

F

510k

S mch dng c m ca tng phm trn Remote TV SONY vo my tnh

Note: S dng chng trnh Hyper Terminal to kt ni n cng com

Trn y l s mch dng c m ca tng phm trn remote

TV vo my tnh thng qua chng trnh Hyper Terminal sn c trong

Windows. Ta c th dng mch ny c m tt c cc phm cacc remote SONY khc nhau vi chng trnh mch np cho chip

AT89C2051 nh sau.

#include

#include

#define signal P3_2

#define led P3_7

char i;

unsigned int bdata key;


75/78



sbit key_4 = key^4;

void delay(void);void pause(unsigned int n);

void control(void);

void external_0_interrupt(void) interrupt 0

{

i = 3;

do

{

delay();

if (signal == 1) return;

}

while (--i);

key = 0;

i = 12;

do

{



delay();

if (signal == 0)

key_4 = 1;

else

key_4 = 0;

key >>= 1;}

while (--i);


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if (i == 0)

{led = 0;

pause(33000);

printf("\n Key coded : %d",key);

led = 1;

}

}

void main ()

{

PCON &=0x7f;

TMOD = 0x21;

TH1 = 0xFD;

TR1 = 1;

EX0 = 1;

IT0 = 1;

EA = 1;

while(1);

}

void delay(void)

{

TH0 = 253; // 750 u_second

TL0 = 77;

TR0 = 1;

while (TF0 == 0);

TR0 = 0;TF0 = 0;

}


77/78



void pause(unsigned int n)

{unsigned int i;

for(i=0;i


78/78


TI LIU THAM KHO

- DATASHEET AT89C51

- DATASHEET TSOP17xx

- 8052com Tutorial & Reference(pdf book)

- 8051 Tutorial (pdf book)

- Writing C Code for the 8051 (Barghiran Group)

- Cc ti liu hng d n lp trnh km theo chng trnh dch

m uVision ca hng KEIL

- C51 Primer by Mike Beach, Hitex (UK) Ltd

- V cc website thng qua h thng search GOGGLE

Do an Tot Nghiep - RF Controller

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Transcript of Do an Tot Nghiep - RF Controller