chuong 5 - giao tiep so

HOC VIN CNG NGH BU CHINH VIN THNG

CHNG 5:

GIAO TIP S

GIANG VIN: IN THOAI/EMAIL: B MN: HOC KY/NM BIN SOAN:

THS. PHAM TH DUY 0903661501 [email protected] IU KHIN VA X LY TIN HIU 02/2010

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NINI DUNG CHNG 55.1 Giao tip song song 5.1.1 Nguyn l 5.1.2 Cng lp trnh c 5.1.3 Centronics Port 5.1.4 Dual ported Ram 5.1.5 PCMCIA 5.1.6 Giao tip iu khin hin th LED, LCD 5.1.7 Encoder 5.1.8 Giao tip cng sut cao 5.2 Giao tip ni tip 5.2.1 Khi nim 5.2.2 Chun RS-232c/V24 5.2.3 Cng RS-232 5.2.4 Hayes Modemswww.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 2

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI

5.1 GIAO TIP SONG SONG5.1.1 Nguyn l 5.1.2 Cng lp trnh c 5.1.3 Centronics Port 5.1.4 Dual ported Ram 5.1.5 PCMCIA 5.1.6 Giao tip iu khin hin th LED, LCD 5.1.7 Encoder 5.1.8 Giao tip cng sut cao

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BAI GIANG MN


5.1.1 Nguyn lD QG OC

Cng m 3 trang thai

Cng cai

Hinh 5.1: Cac thanh phn tao nn cac cng vao ra song song c ban. - m cho phep -> vao = ra; khng cho phep ra high Z, Cai cho phep -> vao = ra; khng cho phep ra gi nguyn trang thai cu.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 4

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cac vi mach vao ra c ban.74LS244D0 Q0 D0

74LS373D Q G Q0

. . .D7

. . .

. . .Q7

. . .

OCGwww.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIKt ni cng ra c ban trong h thng vi x lyA19 A18 : A0 D7 D6 D5 D4 D3 D2 D1 D0 D0 D1 D2 D3 D4 74LS373 D5 D6 D7 LE Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 OE

8088 Minimum Mode

IOR IOW

A A A A A A A A A A A A A A A A IOW 1111119876543210 543210

: mov al, 55H mov dx, F000H out dx, al :Trang: 6

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIKt ni cng vao c ban trong h thng vi x lyA19 A18 : A0 D7 D6 D5 D4 D3 D2 A0 A1 A2 A3 A4 A5 A6 A7 E IOR IOW B0 B1 B2 B3 B4 B6 B7 DIR 5V

74LS245 B5

8088 Minimum Mode

D1 D0

A A A A A A A A A A A A A A A A IOR 1111119876543210 543210

: mov dx, F000H in al, dx :Trang: 7

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICu truc mt cng vao ra s kt hp

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cu truc mt cng vao ra s co bt tay

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI 5.1.2 Cng vao ra song song lp trnh c

Thit k co cc tin hiu bt tay vi thit b ngoai vi. Co th lp trnh thanh cng vao hoac cng ra Co th lp trnh trnh hoat ng nhiu ch khc nhau.

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI S khi b vao ra lp trnh 8255.Bus ni iu khin Nhom A m Bus D0 D7 d liu Nhom A Cng A PA0 PA7

Nhom A Cng C (cao)

PC0 PC3

RD WR A0 A1 Reset CS

Logic iu khin oc ghi

iu khin Nhom B

Nhom B Cng C (thp)

PC4 PC7

Nhom B Cng B

PB0 PB7

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NITin hiu iu khin cac ch hoat ng cua 8255

CS A0 A1 RD WR

Ch hoat ng

10 0 0 0 0 0 0 0

X0 0 0 0 1 1 1 1

X0 0 1 1 0 0 1 1

X0 1 0 1 0 1 1 0

X1 0 1 0 1 0 0 1

Khng chon machoc PA Ghi PA oc PB Ghi PB oc PC Ghi PC Ghi t iu khin CmTrang: 12

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI T iu khin cua 82550 x x x C2 C1 C0 S/R

Hinh 5.8: T iu khin lp xoa bit cng C cua 8255.

1 MA1 MA0 A CH MB B CL Hinh 5.9: T iu khin chon ch cua 8255.

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIKt ni bt tay 8255 ch 1D0 D7 PA0 PA7 INTEA PC7 OBFA PC6 ACKA PA0 PA7 STBA PC4 IBFA PC5 INTEA D0 D7

WR INTA PC3 INTEB

RD

INTA PC3 STBB IBFB OBFB ACKB PC2 INTEA PC1

PC2 PC1

INTB PC0 RD PB0 PB7 PB0 PB7 PC0

INTB

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cac tin hiu bt tay cng truyn ch 1 OBF (Output Buffer Full): ngo ra tc ng mc thp khi b m ngo ra y. Ni ti STB cua cng nhn, cht d liu vao cng nhn. ACK (acknowledge): ngo vao, mc thp bo cng truyn bit cng nhn a nhn xong d liu, luc nay cng truyn co th truyn tip mt d liu khc. INTR (interrupt): ngo ra tc ng mc cao thng bo mt byte CPU ghi ti cng truyn a c truyn xong ti thit b. Tin hiu nay co th s dung yu cu ngt CPU ghi ti mt d liu khc. INTE (Interrupt Enable): la c cho phep ngt truyn bn trong 8255, no co th lp xo bng bit PC5 cho cng A va PC6 cho cng B (khi truyn). Khi INTE b xo, yu cu se khng c gi ti CPU khi 8255 truyn xong mt d liu.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 15

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI inh thi cac tin hiu iu khin cho PA ch 1WR OBFINTR ACK

Data Out

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac tin hiu bt tay cng nhn d liu trong ch 1 STB (Strobe): ngo vao, khi tc ng d liu trn cc ng ni ti cng vao se c cht vao b m ngo vao cng. Tin hiu nay c cp t OBF cua cng truyn. IBF (Input Buffer Full): ngo ra tc ng mc cao thng bo d liu a c cht vao b m nhn, tin hiu nay chi c xo khi CPU oc d liu. INTR (Interrupt Request): la tin hiu yu cu ngt, thng bo cho CPU bit a co mt d liu sn sang CPU oc, tin hiu nay chi c xo khi CPU thc hin mt chu ky oc keo tin hiu RD cua no xung mc thp. INTE (Interrupt Enable):c cho phep ngt trong 8255 c lp xo thng qua vic lp xo bit PC4.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 17

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI inh thi cac tin hiu bt tay ngo vao ch 1.Data IN

STB

IBF INTR RDwww.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 18

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Kt ni truyn d liu ch 2 cua 8255D0 D7 PA0 PA7 INTEA PC7 WR RD PC6 OBFA ACKA STBA IBFA PA0 PA7 INTEA PC4 PC5 RD WR D0 D7

INTEB

PC2 PC1

STBB IBFB

OBFB ACKB

PC1 PC2

INTEA

INTA

PC3 GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU

PC3

INTA

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI inh thi tin hiu bt tay trong ch 2.WR OBF INTR ACK STB

IBF

Data RD

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI5.1.3 Cng vao ra song song LPT (Centronics Port)

Tin thn do hang Centronics pht trin nm 1970, chun ho thanh IEEE 1284 hay LPT. Co 3 chun: SPP - standard parallel port: 5-150KBps, mt chiu cho d liu, nhn 4 bit mt ln. EPP - enhanced parallel port: hai chiu nhanh hn SPP ECP - Extended capabilities port: hai chiu chim 1 knh DMA.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 21

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICng SPP

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cac tin hiu trn cng may in

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cac tin hiu trn cng may in

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Kt ni cac tin hiu vi may in

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cac tin hiu bt tay trn cng may in

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI ia chi cng may in trn may tinh

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Kt ni cac thanh ghi ti cng may in

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Thanh ghi d liu cng may in

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Thanh ghi trang thai cng may in

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Thanh ghi iu khin cng may in

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Kt ni truyn d liu hai chiu trn cng may in

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cng EPP (enhanced parallel port)

La san phm lin kt cua Intel, Xircom va Zenith . Co hai chun la EPP1.7 va EPP1.9. Tc truyn t 500 Kbytes/s n 2 Mbytes/s co DMA.

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac tin hiu ch EPP

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cac thanh ghi ch EPP

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIinh thi xut nhp d liu ch EPP

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac tin hiu ch EPP

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICNG ECP

c Microsoft va HP pht trin. S dung phn cng truyn tc cao. Nen d liu khi truyn cho phep tng tc truyn. S dung 11 thanh ghi: gc +0 n gc +7 va gc +400H n gc +402H

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac thanh ghi ch ECP

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIGian truyn d liu t may tinh ra ngoai vi

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Gian truyn d liu t ngoai vi vao may tinh

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIB NH RAM HAI CNG - DUAL PORTED RAM

Truy cp ng thi bng hai cng vi hai a chi khc nhau. S dung cho vic truyn d liu gia hai h thng vi x ly vi tc cao. Thng thng s dung loai RAM vi mt s mach chng tranh chp cho phep cc chu ky oc ghi ng thi t hai bus.

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI S khi b nh Ram hai cng

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cu tao mt bit nh Ram hai cng

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICu tao mach tao ngt chng tranh chp

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICu tao mach tao tin hiu bn chng tranh chp

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cu tao mach tao c chng tranh chp

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI5.1.5 PCMCIA (Personal Computer Memory Card International Association)

La chun xy dng bi nhiu t chc cng ty. u tin c thit k cho th nh sau pht trin cho cc b tng thich ngoai vi: fax modem, card m thanh, card mang, b iu khin CD ROM, cc card vao ra s Co 4 kiu (Type I Type IV): Type 1 chi cho b nh, cc ngoai vi thng giao tip t Type II tr ln. S dung bus d liu 16 bit va bus a chi 26 bit.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 48

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Dai b nh cua cng PCMCIA Vung nh chung va b nh thuc tinh dung lng 128 MB. Khng gian vao ra 64k a chi vao ra truy xut 8 bit. Tuy theo ch truy xut cng PCMCIA se co tc truy xut khc nhau: Ch cardbus (32 bit burst mode): truy xut theo byte (byte mode) se co tc 32 MBps, theo t (word mode) 66 MBps, va theo t kep (Dword mode) se la 132 MBps. Ch truyn d liu vi b nh 16 bit (chu ky nho nht la 100 nsec): Truyn theo byte at tc cc ai 10 MBps, theo t se la 20 MBps. Ch truyn d liu vi vao ra 16 bit (chu ky nho nht la 255 nsec): truyn theo byte at tc 3.92 MBps, theo t at tc 7.85 MBps.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 49

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIS dung khng gian ia chi cua h thng

Cc thit b giao tip PCMCIA co th ly khng gian a chi b nh chinh hoc vao ra chinh. Vi du modem PCMCIA co th s dung a chi cua COM1 hoc COM2 my tinh. Khi a chim cc khng gian a chi h thng, cc lnh truy xut ti cc a chi nay se c chuyn hng qua PCMCIA. Mt vung a chi c goi la mt ca s. Cc thanh ghi cua PCMCIA se gi cc a chi bt u va kt thuc cua cc ca s.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 50

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac tin hiu trn cng PCMCIA

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Chc nng cac tin hiu trn PCMCIA A25-A0: bus a chi, nh v 226 ai chi b nh hoc 216 a chi vao ra. D7 D0: bus d liu 16 bit. /CARD DETECT 1, /CARD DETECT 2: S dung cho vic nhn dang card co c cm vao bus hay khng. Khi co card c cm vao bus, mt trong cc tin hiu nay se c keo xung mc thp. /Card Enable1: s dung cho phep 8 bit cao cua bus d liu. /Card Enable 2: s dung cho phep 8 bit thp cua bus d liu. /Output Enable: c thit lp mc thp t my tinh oc d liu t PCMCIA.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 52

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Chc nng cac tin hiu trn PCMCIA /Register Select: thit lp mc cao khi truy xut vung nh chung, va thit lp mc thp khi truy cp vung nh thuc tinh. Reset: s dung reset card PCMCIA. Refresh: s dung lam ti b nh trn PCMCIA /Wait: c cp t PCMCIA khi no khng th truyn d liu u nhanh theo yu cu, tin hiu nay se tao ra cc chu ky ch trong h thng. /Write Enable-Program: s dung lp trnh thit b PCMCIA. Vpp1, Vpp2: cp in p lp trnh cho b nh Flash. Ready-/busy: s dung thng bo trang thi sn sang hoc bn cua thit b PCMCIA (khi thit b sn sang tin hiu nay se mc cao).www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 53

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Chc nng cac tin hiu trn PCMCIA /IOIS16: s dung thng bo trang thi chng ghi trn PCMCIA card. Mc cao se chi th cng tc chng ghi ang c bt. /InpAck: s dung thit b PCMCIA chp nhn chu ky truyn d liu. /IOR: c cp t h thng oc d liu t card PCMCIA (no phai c s dung cung vi tin hiu tich cc trn Register Select). /IOW: c cp t h thng ghi d liu ti card PCMCIA (no phai c s dung cung vi tin hiu tich cc trn Register Select). /SPKR: tin hiu nay c s dung card PCMCIA truyn d liu m thanh ti loa cua h thng. /STGCHG: s dung nhn dang s thay i trang thi cua card.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 54

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Thng s ky thut cac loai PCMCIA

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BAI GIANG MN


5.1.6 Giao tip iu khin hin thi man chi thi LED, LCD 5.1.6.1 Giao tip vi b hin th led 7 oan 5.1.6.2 Giao tip b hin th LED ma trn 5.1.6.3 Giao tip vi cc b hin th LCD

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI 5.1.6.1 Giao tip vi b hin thi led 7 oanVcc

U1BCD Input

1 2 4 8 BI/RBO RBI LT 7447

A B C D E F G

B hin thi s dung bng mach lai LED 7 oan.

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7 1 2 6 4 5 3

13 12 11 10 9 15 14

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Hin thi LED theo ch quet.Cng ra cho phep tng LED.

VccQ1 PNP Q2 PNP Q3 PNP Q4 PNP Q5 PNP Q6 PNP Q7 PNP Q7 PNP

Cng ra cp ma LED.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 58

8

8

8

8

8

8

8

8

a b c d e f g dp

a b c d e f g dp

a b c d e f g dp

a b c d e f g dp

a b c d e f g dp

a b c d e f g dp

a b c d e f g dp

a b c d e f g dp

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI5.1.6.2 Giao tip b hin thi LED ma trn

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Ma hin thi trn b hin thi LED ma trn

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIBang hin thi ma trn LED

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI 5.1.6.3 Giao tip vi cac b hin thi LCD

La cc ma trn im s dung tinh th long Loai tich cc va thu ng Tich cc co en phia sau chiu ln Thu ng phan xa nh sng t ngoai vao.

iu khin bng in p ao cc lin tuc trnh t ho tinh th long nn thng co cc mach li sn. Man hnh ln s dung cc cng chun giao tip d liu.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 62

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICu tao LCD 1602A

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac tin hiu LCD 1620A CONST (contrast): chinh tng phan ( sng cua hnh anh trn LCD). EN (Enable): cho phep oc/ghi d liu. Trong ch oc, EN tc ng bng xung dng (canh ln) va trong ch ghi, EN tc ng bng xung m (canh xung). RS (register selection): chon thanh ghi lnh (RS = 0) hoc thanh ghi d liu (RS = 1). R/W: oc (R/W = 1) hay ghi (R/W = 0). D7 D4: bus d liu (ch 8 bit: 4 bit cao, ch 4 bit: dung cho truyn 4 bit cao v 4 bit thp). Ngoai ra, bit D7 cn dung lam ngo ra cho c Busy. D3 D0: 4 bit thp trong ch 8 bit hay bo trng trong ch 4 bit. A, K: anode va cathode en nn cua LCD.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 64

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac thanh phn chc nng cua LCD1602A C Busy (BF Busy flag): Nu BF = 1, LCD ang trong qu trnh thc thi mt lnh. Khi o, cc lnh gi tip theo se b bo qua. BF c oc tai chn D7 khi RS = 0 v R/W = 1. Do o, trc khi thc hin mt lnh, cn kim tra BF trc, nu BF = 0 th mi gi lnh. DDRAM (Display Data RAM): cha cc k t se hin th trn LCD, ti a l 80x8 bit (80 k t). Khi hin th ch 1 dng, a chi cua DDRAM c pham vi t 00h 4Fh cn khi ch 2 dng, a chi DDRAM t 00h 27h cho dng 1 v 40h 67h cho dng 2. B m ia chi (AC - Address Counter): dng lu a chi hin hnh cua DDRAM v CGRAM, c th thc hin oc AC khi RS = 0 v R/W = 1.www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 65

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI CGROM (Character Genaration ROM): cha cc m hnh k t se hin th trn LCD, bao gm 192 k t 5x7 theo bang m ASCII (ngha l khi DDRAM cha gi tr 41h tng ng vi m ASCII cua k t A th trn LCD se hin A), trong o chi c cc m t 00h 0Fh se khng ly theo m ASCII m ly theo cc k t a nh ngha trong CGRAM. CGRAM (Character Genaration RAM): cha cc m hnh k t do ngi s dung nh ngha hin th cc k t khng c sn trong CGROM. CGRAM cho php tao ti a 8 k t 5x8 (xem bang 5.17).

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac ky t inh ngha trong CGRAM

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIVi du: inh ngha ch tai vi tri 1 trong CGRAM

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIinh thi ch truyn 8 bit LCD 1602ARS

R/W

E

Internal signal DB7

Internal operation

No busy DB7 DATA Busy DATA Busy

INSTRUCTION

Busy Flag Check

Busy Flag Check

Busy Flag Check

INSTRUCTION

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIinh thi ch truyn 4 bit LCD 1602ARS

R/W

E

Internal signal DB7

Internal operation

No busy DB7 D7 D3 Busy D7 D3

INSTRUCTION

Busy Flag Check

Busy Flag Check

INSTRUCTION

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac lnh thng dung cua LCD 1602AHex 01H 02H 04H 06H 05H 07H 08H 0AH 0CH 0EH 0FH 10H 14H 18Hwww.ptit.edu.vn

Lnh Xa mn hnh mn hnh Tr v u chui Dch con tr sang trai Dch con tr sang phai Dch man hinh sang phai Dch man hinh sang trai Tt con tr, tt hin th Tt hin th, bt con tr Bt hin th, tt con tr Bt hin th, nhp nhay con tr Tt hin th, nhp nhay con tr Dch v tr con tr sang trai Dch v tr con tr sang phai Dch toan b man hinh sang traiGIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 71

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THIT BI NGOAI VI VA KY THUT GHEP NI Cam bin vong quay (Rotary Encoder) Bin i vong quay thanh chui xung hoc b ma nht nh. Co th s dung cho vic xc nh tc hoc khoang cch chuyn ng Ma ho v tri co hai dang: tuyn tinh (Liner Encoder) va quay (Rotary Encoder). Ma ho quay co hai dang: Ma ho tuyt i (absolute encoder): Tao ra mt t s duy nht tng ng vi mi v tri quay cua no. Ma ho tng (incremental encoder): cung cp cc xung s khi quay cho phep o c v tri tng ng vi goc quaywww.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 72

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cu tao Encoder

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI a quang 4 vach trong cac absolute encoder tao ma gray va nhi phn

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THIT BI NGOAI VI VA KY THUT GHEP NIMa ngo ra cua absolute encoderThp phn 0 1 Khoang goc quay () 0-22.5 22.5-45 Ma nhi phn 0000 0001 Ma Gray 0000 0001

23 4 5 6

45-67.567.5-90 90-112.5 112.5-135 135-157.5

00100011 0100 0101 0110

00110010 0110 0111 0101

78 9 10 11

15.75-180180-202.5 202.5-225 225-247.5 247.5-270

01111000 1001 1010 1011

01001100 1101 1111 1110

1213 14 15

270-292.5292.5-315 315-337.5 337.5-360

11001101 1110 1111

10101011 1001 1000

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI a quang va dang song ngo ra encoder tng

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THIT BI NGOAI VI VA KY THUT GHEP NIXac inh chiu quay theo xung hai knh A va B

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THIT BI NGOAI VI VA KY THUT GHEP NI 5.1.8 Giao tip cng sut cao

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIVi mach khuch ai dong kt ni vi ng c

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIS dung Transistor va Relay cach ly ACLAMP

MOTOR AC

+VccK1

+Vcc 220VK1

220V

RELAY

CONTACTOR

OutRb NPN

Out

Rb NPN DAR

(a)

(b)

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cu tao contactor in t

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIGiao tip cng sut bng MOSFET (a) va IGBT (b)

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI 5.2 GIAO TIP NI TIP

5.2.1 Khai nim 5.2.2 Chun RS-232c/V24 5.2.3 Cng RS-232 may tnh 5.2.4 Modem

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI5.2.1 Khai nim

Truyn d liu ni tip (a) Simplex, (b) Hafl Duplex, (c) Full duplexwww.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 84

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac thanh phn trong h thng truyn d liu ni tip

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THIT BI NGOAI VI VA KY THUT GHEP NI5.2.2 Chun RS-232c/V24

RS-232C (Recommended Standard 232 version C) la mt tiu chun do Electronic Industries Association ( EIA) \. Cc thit b ghep ni chia thanh hai loai: DTE (Data Terminal Equipment): thit b truyn nhn d liu PC, PLC, MCU DCE (Data Communication Equipment): la thit b trung gian modem

Mc logic 1: - 3 n -15 V, mc 0 t 3 n 15V Co c tinh chng ngn mach ngo ra. Tc cao nht co th ti 115,200 bpswww.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 86

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THIT BI NGOAI VI VA KY THUT GHEP NIKhung truyn d liu bn truyn trong ch cn ng b.TxD Making Cac bit d liu c Bit chn le Stop bit lam du Start bit lp trinh trc

Tao ra khi c lp trinh

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NITin hiu trn cng RS232C khi truyn ky t A

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THIT BI NGOAI VI VA KY THUT GHEP NI c tinh ky thut cng RS232C

Chiu dai cable cc ai Tc d liu cc ai

15m 20 Kbps

in ap ng ra cc aiin ap ng ra co tai Tr khang tai

25V 5V n 15V 3K n 7K

in ap ng vao nhay ng vao Tr khang ng vaowww.ptit.edu.vn

15V 3V 3K n 7KTrang: 89


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THIT BI NGOAI VI VA KY THUT GHEP NI Cac loai u ni tin hiu theo chun RS232

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THIT BI NGOAI VI VA KY THUT GHEP NIChc nng cac tin hiu trn cng truyn RS232CD2 5 1 2 3 4 5 6 7 DB 9 3 2 7 8 6 5 TxD RxD RTS CTS DSR GND Tn hiu Hng truyn DTEDCE DCEDTE DTEDCE DCE DTE DCE DTE M ta Protected ground: ni t bao v Transmitted data: chn truyn d liu Received data: chn nhn d liu Request to send: DTE yu cu truyn d liu Clear to send: DCE sn sang nhn d liu Data set ready: DCE sn sang lam vic Ground: ni t (0V)

820 22

14 9

DCDDTR RI

DCE DTEDTE DCE DCE DTE

Data carier detect: DCE phat hin song mangData terminal ready: DTE sn sang lam vic Ring indicator: bo chungTrang: 91

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THIT BI NGOAI VI VA KY THUT GHEP NIChc nng cac tin hiu trn cng truyn RS232C23 24 15 DSR D DCE DTE Data signal rate detector: d tc truyn

TSET DTE DCE Transmit Signal Element Timing: tn hiu nh thi truyn i t DTE TSET DCE DTE Transmitter Signal Element Timing: tn hiu nh thi truyn t DCE truyn d liu

17 - RSET DCE DTE Receiver Signal Element Timing: tn hiu nh thi truyn t DCE truyn d liu 18 - LL 21 - RL Local Loopback: kim tra cng DCE DTE Remote Loopback: Tao ra bi DCE khi tn hiu nhn t DCE li

14 - STxD DTE DCE Secondary Transmitted Data 16 - SRxD DCE DTE Secondary Received Datawww.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 92

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THIT BI NGOAI VI VA KY THUT GHEP NIChc nng cac tin hiu trn cng truyn RS232C19 SRTS DTE DCE Secondary Request To Send

13 12 259 10 11

-

SCTS

DCE DTE

Secondary Clear To Send Secondary Received Line Signal Detector Test ModeDanh ring cho ch test Danh ring cho ch test Khng dng

SDSRD DCE DTE TM

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIKt ni cng RS232

Kt ni Null Modem trn cng RS232

Kt ni trong truyn thng ni tip dung tin hiu bt taywww.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 94

BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI 5.2.3 Cng RS-232 may tinh

Tn COM1 COM2 COM3

ia ch 3F8h 2F8h 3E8h

Ngt Vi tr cha ia ch 4 3 4 0000h:0400h 0000h:0402h 0000h:0404h

COM4www.ptit.edu.vn

2E8h

3

0000h:0406hTrang: 95


BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac thanh ghi UART cng ni tip

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Chc nng cac bit thanh ghi IIR

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THIT BI NGOAI VI VA KY THUT GHEP NI Thanh ghi IER

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MCR (Modem Control Register)

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THIT BI NGOAI VI VA KY THUT GHEP NIMSR (Modem Status Register)

Thanh ghi thng bao trang thai ng truyn LSR (Line Status Register)

Thanh ghi iu khin ng truyn LCR (Line Control Register)

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THIT BI NGOAI VI VA KY THUT GHEP NI Chc nng cac bit thanh ghi LSR FIE: FIFO Error sai trong FIFO. TSRE: Transmitter Shift Register Empty thanh ghi dch rng (=1 khi a pht 1 k t v b xo khi c 1 k t chuyn n t THR. THRE: Transmitter Holding Register Empty (=1 khi c 1 k ta chuyn t THR TSR v b xo khi CPU a k t ti THR). BI: Break Interrupt (=1 khic s gin oan khi truyn, ngha l tn tai mc logic 0 trong khoang thi gian di hn khoang thi gian truyn 1 byte v b xo khi CPU oc LSR). FE: Frame Error (=1 khi c li khung truyn v b xo khi CPU oc LSR). PE: Parity Error (=1 khi c li parity v b xo khi CPU oc LSR). OE: Overrun Error (=1 khi c li thu e, ngha l CPU khng oc kp d liu lm cho qu trnh ghi chng ln RBR xay ra v b xo khi CPU oc LSR). RxDR: Receiver Data Ready (=1 khi a nhn 1 k t v a vo RBR v b xo khi CPU oc RBR).www.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 101

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THIT BI NGOAI VI VA KY THUT GHEP NIChc nng cac bit thanh ghi LCR (Line Control Register) DLAB (Divisor Latch Access Bit) = 0: truy xut RBR, THR, IER, = 1 cho php t b chia tn trong UART cho php at tc truyn mong mun. UART dng dao ng thach anh vi tn s 1.8432 MHz a qua b chia 16 thnh tn s 115,200 Hz. Khi o, tuy theo gi tr trong BRDL v BRDH, ta se c tc mong mun. V du nhng truyn c tc truyn 2,400 bps c gi tr chia 115,200 / 2,400 = 48d = 0030h nh vy BRDL = 30h, BRDH = 00h. SBCB (Set Break Control Bit) =1: cho php truyn tn hiu Break (=0) trong khoang thi gian ln hn mt khung. PS (Parity Select): Khng kim tra, kim tra chn hoc kim tra le STB (Stop Bit) = 0: 1 bit stop, =1: 1.5 bit stop (khi dng 5 bit d liu) hay 2 bit stop (khi dng 6, 7, 8 bit d liu). WLS (Word Length Select): T 5 8 bitwww.ptit.edu.vn GIANG VIN: THS. PHAM TH DUY B MN: IU KHIN VA X LY TIN HIU Trang: 102

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THIT BI NGOAI VI VA KY THUT GHEP NICac mach chuyn mc giao tip TTL va RS232C

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NIMach chuyn mc giao tip TTL va RS232C dung MAX 232

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Ghep ni truyn nhn ni tip vi sai RS422

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICu truc mang truyn ni tip RS485

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI 5.2.4 Modem (modulator + demodulator)

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NICac tin hiu giao tip cua modemDTE 9 chn DTE 25 chn DCE Modem

1 FG3 2 7 8 6 5 1 4 9 Truyn ng b 2 TD 3 RD 4 RTS 5 CTS 6 DSR 7 SG 8 DCD 20 DTR 22 RI 15 TXCLK 17 RXCLK 24 XTCLK

1 FG2 TD 3 RD 4 RTS 5 CTS 6 DSR 7 SG 8 DCD 20 DTR 22 RI 15 TXCLK 17 RXCLK 24 XTCLK

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cac chun modem

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THIT BI NGOAI VI VA KY THUT GHEP NI Cac lnh cua modem

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cac lnh cua modem

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BAI GIANG MN

THIT BI NGOAI VI VA KY THUT GHEP NI Cac thng bao cua modem

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chuong 5 - giao tiep so

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