Chuong Trinh Delay

Ngiboco: NguynTrungChnh Tiliu: TUT02.03

Ngy: 2/9/2006 Trang: 1/17

Tutorial02.03

Gin: onHip,DonMinhng,[email protected]

Nidung: Bi2:CHNGTRNHDELAY

MICROSOFTWORD

Tmtt:Tutorialpostlnpicvietnam,topicPIC16F877ATDTIKHthuclungCBNV

VIIUKHINVPICvinidung: Vintslcvmcchvtcdngcachngtrnhdelay.- Phntchsourcecodemtschngtrnhdelay.- Tptrungphntch,khaithcchngtrnhdelaycaNigelnhmtdngchngtrnhdelay

cchunha.TutorialnysdngkhnhiucckinthctrongtutorialcaNigel.

1. Vintslcvchngtrnhdelay.1.1. Chukxungclockvchuklnh

Trongphnny tasbnnmtvikin thccsphcvchovicvitchngtrnhdelay.CthltmhiuvchukxungclockvchuklnhtrongviiukhinPIC.

Tabitviiukhinhotngccnphicungcpmtngunxungclocktbnngoi.iviviiukhinPIC,ngunxungclockcthlmtmchdaongRCngin,mtthchanh,...Ttnhin,yucucangunxungclockphilcngnnhcngtt.

Thng thng,ngunxungsdngchoviiukhinnichungvPICniring lthchanhviccuimgithnhkhngcao,khnnhvrtthuntintrongvictnh ton, thitkmchngdngvchng trnhchoviiukhin.Trongbiny, tacngsdngthchanhlmngunxungchoviiukhin.

Mithchanhcmttnsdaongcnh,tagitnslf0,thngthngf0ccctns4MHz,10MHz,20MHz,...Tytheomiloiviiukhinmyucuivif0cthkhcnhau.iviviiukhinPIC16F877A,tnsdaongf0 phinhhnhocbng20MHz,ycng l tnshotng tiamasccviiukhinPICthucdngmidrangeckhnngpngc.Chukdaongcathchanhtagilt0vctnhtheocngthc:

t0=1/f0 (1)Rtcbn!Khngcgcnchthchthmchocngthcny.


Ngy: 2/9/2006 Trang: 2/17

Tacngbitrngchailikintrcdngtchcmtviiukhin,lkin

trcVonNeumanvkintrcHavard.ViiukhinPICctchctheolikintrcHavard.Takhngisuvocc likintrcny,mchcnbitrngvilikintrcHavard,mi lnhsc thc thixong trongmtkhong thigian lmtchuk lnh.Khongthigiannyluncnhvphthucvochukcaxungclock.

Tacmtnhnghamang tnh ...ikhinhsau:chuk lnhcaviiukhinPIClkhongthigianmviiukhinPICthcthixongmtlnh.Tagithigiancamtchuklnhlti.

thcthixongmtlnh,viiukhinPICcnn4chukxungclock.Nhvythigianthcthixongmtlnhsctnh:

ti=4t0 (2)

Thaycngthc(1)vocngthc(2)tacccngthctnhthigiancamtlnh(mtchuklnh)nhsau:

ti=4/f0 (3)

Vd:nutasdngthchanhloi4MHzththigianthcthimtlnhcaviiukhinl:

ti=4/(4106)=1sthuntinchovictnhtonvthitkchngtrnhdelay,tassdngloithch

anh4MHzchomchngdng,vnhccbnthy,thigianthcthimtlnhcaviiukhinlcdl1s.Quchn!1.2. Mcchvtcdngcachngtrnhdelay

Nhtathymc1.1,thigianthcthilnhcamtviiukhinlrtnhanhsovitccmnhnsvthintngcaconngi.iunygynhiukhkhnchovicgiaotipgiaconngivimtviiukhincngnhkhkhntrongviccmnhnbnggicquanktquccthaotccamtviiukhin.

Vdu,tadngviiukhiniukhinmtLEDchpttlintc.Vithaotcnyviiukhinchcnhaichuklnhlhonttmtchukchptt,vthigiancamichuksl2s(khisdngthchanh4MHz),vtrongmtgiy,LEDschptt500000ln.Trongkhimtngichcthnhnbitc24hnhnhtrongmtgiy.iunycnghal,mtngingoihnhtinh,viconmtctcx lhnhnhnhanhhn,khichngkinhintngtrnsnirng:Eh,ngitrit,tithyccigangchptt.Cnngitrit,vitcxlhnhnhcamtl24hnhtrong1giy,khichngkinhintngtrnsnirng:Khng,ngingoihnhtinh,tithynsnglintcch!.


Ngy: 2/9/2006 Trang: 3/17

Nhvy, lmsaomtngicmnhncLEDangchptt,cchduynht l

phigimslnchptttrong1giynhhn24,ccthaotcviiukhinhinthchoconngithychintngtrnlnltsl:

- BtLEDsngln- ChmtchtchotikhimtnhnchnhnhLEDsng.- TtLED- ChmtchtchotikhimtnhnchnhnhLEDtt.- Lpliccthaotctrn.Nhtabit,doviiukhinkhngccilnhgilchmtcht,chonnkhi

nimchngtrnhdelaymicphtsinhthchinqutrnhch.

Cthnichngtrnhdelayngmtvaitrquantrngtrongccthaotchinth.Bncnh,chngtrnhdelaycncvaitrquantrngtrongvicgiaotipviccthitbkhc,khimtcxlcaviiukhinvccthitbkhngngnht.Ngoira,tacn sdng chng trnhdelay trongnhiu tnhhung thc t cn ra lnh chovi iukhinphich.

2. Xydngchngtrnhdelay2.1. Cclnhsdngchochngtrnhdelay

Ngoicclnhccpntrongbi1,tacnsdngthmcclnhsauchochngtrnhdelay:

LnhDECFSZ

Cphp: DECFSZ thanh_ghi,noi_den

Lnh1

Lnh2

Tcdng:Gimgitrchatrongthamsthanh_ghivsosnhvi0.

- Nugitrsaukhigimkhc0,lnh1cthcthi.

- Nugitrsaukhigimbng0,lnh1khngcthcthivcthaybnglnhNOP(khnglmgc).

Thamsnoi_dendngxcnhnilugitrthanhghithanh_ghisaukhigim.Khikhngsdng thamsnoi_den, trnhbindchsmcnh lktqucchatrongthanhghiW.

- Nuthamsnoi_denbng1,ktqucchatrongthanhghithanh_ghi.

- Nuthamsnoi_denbng0,ktqucchatrongthanhghiW.


Ngy: 2/9/2006 Trang: 4/17

LnhRETURN

Cphp: RETURN

Tcdng: trvchngtrnhchnhtchngtrnhcon.

LnhRETLW

Cphp: RETLW tham_so (0tham_so255) Tcdng: trvchngtrnhchnhtchngtrnhconvigitrtham_so

cchatrongthanhghiW. 2.2. Thuttonchochngtrnhdelay

Tabitphn1,chngtrnhdelaylchngtrnhdngralnhchoviiukhin...chmtcht(tmthinhnghamtcch...ikhinhvy).iunycngngnghavivicralnhchoviiukhinlmmtcngvicvnghanotrongmtkhongthigiandotaquytnh.

TrongtplnhcaviiukhinPIC,taclnhNOP.Lnhnyctcdungralnhchoviiukhin ...khng lmgc,v thigian thc thi lnhnycng l1chuklnh.Nhuvy,taccnthitphixydngthuttonchochngtrnhdelay,vchcn...NOPlintclxong?Hontonkhngnginnhvy,vkhitasgpphiccvnsau:

- Thnht,cithuttoncv...khngbnhthng.

- Thhai,vit chng trnhnhvy th rtmi tay (mun ra lnh chovi iukhinch1ms,bnphivitivit lici lnhNOP ...1000 lnnusdngloithchanh4MHz).

- Thba,dunglngbnhchngtrnhbphphmmtcch...qung.

Rrngltakhngthvitchngtrnhdelaytheocch.Vvickhcphcttcccnhcimnutrncnglcctiuchtrachomtchngtrnhdelay,l:ngngonvthuntinchovicsdng.

Mtphngphpthngsdngvitccchngtrnhdelaylchoviiukhin...nhy tinhy luimyci label.Tuynhin kimsotc thigiandelaydochngtrnhtora,tacntnhtonccgitrtrongchngtrnhmtcchphhp.

Sauytasdisuvoccthuttondngvitchngtrnhdelayny.

2.2.1 Thutton1

TrongthuttonnytasdnglnhDECFSZxydngchngtrnhdelay.

onchngtrnh1:xtmtoncodenhsau


Ngy: 2/9/2006 Trang: 5/17

MOVLW d20 ;agitr20vothanhghiW

MOVWF delayreg ;delayreg


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Mun to thigiandelay luhn, taphi tng s lng ccvng lp ln. on

chngtrnhsauminhhacchtngslngvnglpchochngtrnhdelay:

onchngtrnh2:

MOVLW d255 MOVWF delayreg1 ;agitr255vothanhghidelayreg1

loop DECFSZ delayreg1,1 ;gimgitrthanhghidelayreg1vsosnhvi0 ;gitrsaukhigimluvothanhghidelayreg1

GOTO loop1 ;nuchabng0nhytilabelloop1 GOTO next ;nubng0chngtrnhdelayhonttloop1

MOVLW d255 MOVWF delayreg2 ;avothanhghidelayreg2gitr255loop2 DECFSZ delayreg2,1 ;gimgitrthanhghidelayreg2vsosnhvi0 ;gitrsaukhigimluvothanhghidelayreg2

GOTO loop2 ;nuchabng0thnhynlabelloop2 GOTO loop ;nubng0thnhynlabelloopnext ; cclnhtiptheosauchngtrnhdelay

Taxtonchngtrnht labelloop1 trc.onchngtrnhnytngtnhonchng trnh1,chonncch tnh thigiandelay trongonchng trnhnykhngcgthayi.GitrNtrongcngthc4stngngvigitrN2avothanhghidelayreg2(255).TagiT2lthigiandelaydoonchngtrnhnytorathT2sctnhnhsau:

T2=3(N2+1)ti (5) Khigitrtrongthanhghidelayreg2gimv0thcclnhtlabelloopc

thcthi.thiimnygitrtrongthanhghidelayreg1sgimimtnvvtiptcthcthivnglploop1.NhvysaumtkhongthigianT2,gitritrongthanhghidelayreg1sgimimtnv,vnutagiN1lgitravothanhghidelayreg1thslngimgitrtrongthanhghidelayreg1sl(N1+1).NhvythigiandelayTdoonchngtrnh2toral:

T=(N1+1)T2=3(N1+1)(N2+1)ti (6)

Datheoccgitravotrongonchngtrnh2tacthtnhcthigiandelaydoonchngtrnhtrntoranhsau:

T=3(255+1)(255+1)ti=196608ti


Ngy: 2/9/2006 Trang: 7/17

Nusdng loi thchanh4MHz th thigiandelaydoonchng trnh trn

toral196608s.

Nhvy,tyvothigiandelaycnthitvtyvoloithchanhsdngtrongmchmtacthaccgitrN1vN2voccthanhghidelayreg1vdelayreg2mtcchthchhpdavocngthc(6).

Vd: tnh ton ccgi tr avo thanhghidelayreg1vdelayreg2 thigiandelaydoonchngtrnh2toral90ms.Gistaangsdngloithchanh4MHz.

Tagiibitonnhsau:doloithchanhtasdngctns4MHznnti=1s.Dotac

(N1+1)(N2+1)=T/3ti=90103/(31106)=30103

Nuchngitravothanhghidelayreg2 lN2=199thgitrN1avothanhghidelayreg1sl:

N1=30103/(199+1)1=149

Mtimcnch lbncnhvicthamncngthc (6),ccgitrN1vN2phithamniukin:

0


Ngy: 2/9/2006 Trang: 8/17

MOVWF countb ;agitr1vothanhghicountb

delay_0

DECFSZ counta,1 ;gimgitrtrongthanghicountavsosnhvi0

GOTO $+2 ;nuchabng0,nhytilnhGOTOdelay_0

DECFSZ countb,1 ;nubng0,gimgitrtrongthanhghicountb

GOTO delay_0 ;countbsaukhigimcgitrbng0nnlnhny

;khngcthcthi

DECFSZ count1,1 ;gimgitrtrongthanhghicount1

GOTO d1 ;nhyvlabeld1

;cclnhtiptheocachngtrnhchnhsauon

;chngtrnhdelay

TrctintalunlnhGOTO$+2.LnhnyctcdngnhytilnhthhaiktdnglnhGOTO$+2,tclnhynlnhGOTOdelay_0.Hontontng t tac thdng lnhccu trctng tnhynbtcdng lnhnotrongchngtrnhthngquavicthaythhngssaudu$.

Taxtoncodebtu t labeldelay_0 trc.LnhDECFSZ counta,1mtmtchuk lnh thc thi.Nugi trcha trong thanhghicountachabng0 thlnhGOTO$+2cthcthi.Lnhnymthaichuklnh.Tiptheo,lnhGOTOdelay_0cthcthi.Lnhnycngmthaichuklnh.Sau,gitrtrongthanhghicounta tip tccgim.ny tanhn thyrng,gimmtgi tr trongthanhghicounta,tamtht5chuklnh(1chuklnhcholnhDECFSZcounta,1,2chuklnhcholnhGOTO$+2v2chuklnhcholnhGOTOdelay_0),vdogitravothanhghicountal199nnthigiancnthitthanhghicountagimhtgitrv0l:

Ta=5(199+1)ti

Dotaangsdnglaithchanh4MHznnTasmanggitr1000shay1ms.

Khigitrtrongthanhghicountabng0,lnhGOTO$+2skhngcthcthimthayvollnhNOP,tiptheolnhDECFSZcountb,1scthcthi.Tathygitravothanhghicountbl1nnsaukhigimcountbsbng0nnlnhGOTOdelay_0scthaybnglnhNOPvtiptheo,lnhDECFSZcount1,1scthcthi.Sauchngtrnhquaytrvlabeld1thchinvicnpliccgitrchothanhghicounta,countbvtiptcthcthioncoedetlabeldelay_0.

Nhvyvicagitr1vothanhghicountbthcchtch lthchinqutrnhchuyntipmikhithanhghicountagimv0.Voncodetlabeldelay_0thcchtltorathigiandelaygnng1msdotabquamtschuklnh


Ngy: 2/9/2006 Trang: 9/17

trongbcchuyntip(lumtlnnaltaangsdngloithchanh4MHz),saugitrtrongthanhghicount1cgim1nv.Vnglpctiptcchonkhigi tr trong thanhghi count1 cgimv0.Khi lnhGOTO d1khngc thc thinavqu trnh to thigiandelaykt thc,cc lnh tip theo trongchngtrnhchnhstiptccthcthi.

nytacthnhnthyrngcmi1msthgitrtrongthanhghicount1sgimi1nv.Do,muntorabtcmtthigiandelaynolbisca1ms,tachvicagitrtngngvothanhghicount1.Trongvdonchngtrnh3,dotaavothanhghicount1gitr90nnthigiandelaysl90ms.Hontontngtchovictorathigiandelay10ms,50ms,100ms,150ms,200ms,tacngddngnhnthylthigiandelaytiadoonchngtrnhtrntoral255ms.Viccthaotcthngthngdnhchoviiukhin,cthniylthigiandelaylntacthsdng.

Thutton2tuydihnvsdngnhiuthanhghihnsovithutton1nhngncnhiuuimhnthutton1dotnhlinhngvdsdngcan.Tacthsdngonchng trnhdelaynynhmtchng trnhdelaymuchovicxydngccngdngchoviiukhinPIC.

Trong trnghpsdng lai thchanhc tnscaohn, tac thkthphaithutton1v2torathigiandelaymongmun.

3. ngdngTrongccphn trn, tac thhnhdungcmcch, tcdngvmtsgii

thutchovicxydngmtchngtrnhdelay.Bygillcsdngcckinthcchoccngdngcth.

ngdng1:Ta s pht trin ng dng u tin cho chng trnh delay tmch nguyn l v

chngtrnhcxydngtrongbi1.Trongbi1,tathchinvitxutccgitr raPORTBvkim chngbng ccLEDgnvoPORTB.Bygi ta svitchngtrnhchottcccLEDgnvoPORTBchpttsaumikhongthigian100ms.

Giithutchochngtrnhchccngkhngcgphingbn,ccbcthchinlnltsl:

- BtttcccLEDPORTB

- Delay100ms

- TtttcccLEDPORTB

- Delay100ms

- Lpliccthaotctrn


Ngy: 2/9/2006 Trang: 10/17

Chngtrnhscvitnhsau:Chngtrnh2.1:;=============================================================================

;WWW.PICVIETNAM.COM

;Laptrinh: NGUYENTRUNGCHINH

;Ngaybatdau: 23thang01nam2006

;Ngayhoanthanh: 23thang01nam2006

;Kiemtrachuongtrinh:DoanHiep,DoanMinhDang,

; [email protected]

;Ngaykiemtra:

;SudungvidieukhienMicrochip: PIC16F877A

title chuongtrinh21.asm

processor 16f877a

include

__CONFIG _CP_OFF&_WDT_OFF&_BODEN_OFF&_PWRTE_ON&

_XT_OSC&_WRT_OFF&_LVP_OFF&_CPD_OFF

;Capnhatvabosung:

;Motachuongtrinh: ChuongtrinhdungdedieukhientatcacacLEDganvao

; PORTBchoptatlientucsaumoikhoangthoigian100ms.

; Khongsudungchuongtrinhcon

;Motaphancung: 8LEDduocganvaoPORTBthongquacacdientro,cac

; thanhphandikembaogomthachanh,machresetvanguon

;=============================================================================

;

;Khoitaocacbien

;

count1 EQU 0x20 ;cacbiendungchodoanchuongtrinhdelay

counta EQU 0x21

countb EQU 0x22


Ngy: 2/9/2006 Trang: 11/17

;=============================================================================

;CHUONGTRINHCHINH

;=============================================================================

ORG 0x000

GOTO start

start

;

;KhoitaoPORTB

;

BCF STATUS,RP1

BSF STATUS,RP0 ;chonBANK1

CLRF TRISB ;PORTB


Ngy: 2/9/2006 Trang: 12/17

delay_01

DECFSZ counta,1

GOTO $+2

DECFSZ countb,1

GOTO delay_01

DECFSZ count1,1

GOTO d1_1 ;hetdoanchuongtrinhdelay

CLRF PORTB ;tatcacLEDoPORTB

MOVLW d100 ;doanchuongtrinhdelay100ms

MOVWF count1

d1_2

MOVLW d199

MOVWF counta

MOVLW d1

MOVWF countb

delay_02

DECFSZ counta,1

GOTO $+2

DECFSZ countb,1

GOTO delay_02

DECFSZ count1,1

GOTO d1_2 ;hetdoanchuongtrinhdelay1ms

GOTO loop ;trovevonglapchinhcuachuongtrinh

END


Ngy: 2/9/2006 Trang: 13/17

Vi chng trnh trn, ta c th quan st cc hin tng do vi iu khin to ra PORTBthngquaccLED.Dothigiandelay l100mschonntrong1giytrngthicaLEDsthayi10ln.iunychophptaquanstcbngmtthng.bygi,cc bn hy th gim thi gian delay xung nh dn (gim gi tr a vo thanh ghicount1),xemhintnggsxyra.Khithigiandelaygimnmtgitrno,tasccmgicrngccLEDkhngcnchpttna,mssngmtcchlintc.

Taddngnhnthymtnhcimtrongchngtrnhtrnlphivitivitlichng trnhdelay nhai ln,vmt lnna,vn vdung lngbnh chngtrnhctra.Mtgiiphpkhcphcnhcimtrn,lchngtrnhcon.

Mtchngtrnhconcthtmhiulmtoncodenoclpilplinhiulntrongchngtrnhchnh,vthayviphivitivitlioncodenhiuln,tatchconcodethnhmtchngtrnhconvgioncodetchngtrnhchnhthngqua lnhCALL.Mtchngtrnhconsbtubng1 labelvktthcbnglnhRETURNhoclnhRETLW.

C thnichng trnhcongip tacnhiuphngnhn trongvic tchcmtchngtrnhvitchoviiukhin.

Bygi, tas tchc lichng trnh2.1 thnhmtchng trnhmibngcchsdngchng trnhconcho oncode to thigiandelay100ms.Chng trnhmi scvitnhsau:

Chngtrnh2.2:

;=============================================================================

;WWW.PICVIETNAM.COM

;Laptrinh: NGUYENTRUNGCHINH

;Ngaybatdau: 23thang01nam2006

;Ngayhoanthanh: 23thang01nam2006

;Kiemtrachuongtrinh:DoanHiep,DoanMinhDang,

; [email protected]

;Ngaykiemtra:

;SudungvidieukhienMicrochip: PIC16F877A

title chuongtrinh22.asm

processor 16f877a

include


Ngy: 2/9/2006 Trang: 14/17

__CONFIG _CP_OFF&_WDT_OFF&_BODEN_OFF&_PWRTE_ON&

_XT_OSC&_WRT_OFF&_LVP_OFF&_CPD_OFF

;Capnhatvabosung:

;Motachuongtrinh: ChuongtrinhdungdedieukhientatcacacLEDganvao

; PORTBchoptatlientucsaumoikhoangthoigian100ms.

; Cosudungchuongtrinhcon

;Motaphancung: 8LEDduocganvaoPORTBthongquacacdientro,cac

; thanhphandikembaogomthachanh,machresetvanguon

;=============================================================================

;

;Khoitaocacbien

;

count1 EQU 0x20 ;cacbiendungchodoanchuongtrinhdelay

counta EQU 0x21

countb EQU 0x22

;=============================================================================

;CHUONGTRINHCHINH

;=============================================================================

ORG 0x000

GOTO start

start

;

;KhoitaoPORTB

;

BCF STATUS,RP1

BSF STATUS,RP0 ;chonBANK1

CLRF TRISB ;PORTB


Ngy: 2/9/2006 Trang: 15/17

;

;Vonglapchinh

;

loop

MOVLW 0XFF

MOVWF PORTB ;battatcacacLEDoPORTB

CALL delay_100ms;goichuongtrinhcontaothoigiandelay100ms

CLRF PORTB ;tatcacLEDoPORTB

CALL delay_100ms;goichuongtrinhcontaothoigiandelay100ms

GOTO loop ;trovevonglapchinhcuachuongtrinh

;=============================================================================

;CHUONGTRINHCON

;=============================================================================

delay_100ms ;labelbatdauchuongtrinhcon

MOVLW d100 ;doancodechochuongtrinhcondelay100ms

MOVWF count1

d1

MOVLW d199

MOVWF counta

MOVLW d1

MOVWF countb

delay_0

DECFSZ counta,1

GOTO $+2

DECFSZ countb,1

GOTO delay_0

DECFSZ count1,1

GOTO d1

RETURN ;ketthucchuongtrinhcon,trovechuongtrinhchinh

END


Ngy: 2/9/2006 Trang: 16/17

Tanhn thy rngvi cch t chc chng trnh sdng chng tnh con, chng

trnhchnhcngtrnnngngn,dhiuvrrnghnrtnhiu.

Tip theo, tas tin thmmtbcnabngcch t lmkhmnhviyucuminhsau:

ngdng2:Yucucangdngnycng tng tnhngdng1, tuynhin ta s thayi

nhiuthigiandelaykhcnhau,cthnhsau:

- BtttcccLED

- delay100ms

- TtttcccLED

- Delay200ms

Rrngltrongonchngtrnhchnh,giithutkhngcnhiukhcbit.ThayvsaukhittLED,tagichngtrnhcondelay_100msthbygisgichngtrnhcondelay_200ms(ttnhinltaphivitchngtrnhconnythmiccigi).Vnylvitnhthnochongnnht.

pngcyucucabiny, tachcn thayimtvichi titnh trongchngtrnhcondelay.Cthnhsau:

delay_100ms ;labelbatdauchuongtrinhcondelay_100ms

MOVLW d100

GOTO delay

Delay_200ms ;labelbatdauchuongtrinhcondelay_200ms

MOVLW d200

GOTO delay

delay

MOVWF count1

d1

MOVLW d199

MOVWF counta

MOVLW d1

MOVWF countb

delay_0

DECFSZ counta,1


Ngy: 2/9/2006 Trang: 17/17

GOTO $+2

DECFSZ countb,1

GOTO delay_0

DECFSZ count1,1

GOTO d1

RETURN ;ketthucchuongtrinhcon,trovechuongtrinhchinh

Nhtabitphn2,vithutton2,munthayithigiandelaychochngtrnhdelay,tachvicthayigitravothanhghicount1.ytacnglmthaotctngt.oncodetlabeldelaycginguynkhngthayi.Khigichngtrnh con delay_100ms, gi tr 100s c a vo thanh ghiW, sau nhy ti labeldelayagitrvothanhghicount1tiptcthchinvictothigiandelay.Ccthaotcctinhnhtngtnhkhigichngtrnhcondelay_200msvlcgitrcavothanhghiWsl200.

Hontontngttacthtoramtlotnhngchngtrnhdelay1ms,2ms,5,ms,sdngmtcchddngtytheoyucuvchngtrnhdelaycangdngcth.

nyxemnhtaphttrinmtcchkhhonthinvccgiiphpchochngtnhdelay thngquavicxydngchngtrnhcondelayvhiuccchtonhiuthigiandelaykhcnhautrongcngmtchngtrnhmkhngcnphivitivitlinhiuchngtrnhdelay.

Bygillcrtramtviktluntrckhiktthcbi2vchunbchobi3.

4. KtlunChng trnhdelay ngmt vai tr kh quan trng trong vicpht trin cc ng

dngchoviiukhin.Chngtrnhdelaycsdngnhiutrongccthaotchinthvtrongccngdngcnralnhchoviiukhinphich.

Ccthuttondngxydngchngtrnhdelayphithamncctiuchngngnvthuntinchovicsdng,ngthigiptakimsotcthigiandelaydoonchngtrnhtora.

Thigiandelaydochngtrnhdelaytorasphthucvogiithutsdngchochngtrnhdelayvloithchanhsdngchoviiukhin.

Chng trnh congip ta c cnhiuphngn t chcmt chng trnh ngdngmtcchlinhhot,gngngvdhiuhn.

Htbi2!

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Chuong Trinh Delay