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Iyini i-serial RS232 Port?
2024-11-06 10:52:21
Imbobo ye-serial ye-RS232 iyindinganiso yokuxhumana ethandwayo evumela ukudluliswa kwedatha ye-serial phakathi kwamadivayisi. Izinga le-RS232, elahlongozwa okokuqala yi-Electronic Industries Association (EIA) ngeminyaka yawo-1960, labonakala libalulekile ekuxhumaniseni Izisetshenziswa Zesitheminali Sedatha (i-DTE), njengamakhompyutha, Nezisetshenziswa Zokuxhumana Ngedatha (DCE), njengamamodemu. Le phrothokholi ibibalulekile ekuxhumaneni kwamakhompiyutha okuqala futhi isasetshenziswa kwezinye izinhlelo zokusebenza zezimboni nezishumekiwe namuhla.
Okuqukethwe
- 1. Ukubaluleka Komlando
- 2. Kungani i-RS232 Ihlala Ifanelekile?
- 3. Izisekelo Zokuxhumana Kwe-serial
- 4. I-RS232 Protocol Ichaziwe
- 5. Isebenza kanjani i-RS232?
- 6. Izicelo Ezivamile Zezimbobo ze-RS232
- 7. Umehluko Phakathi kwe-RS232, RS485, kanye ne-RS422 Serial Ports
- 7. Umehluko Phakathi kwe-RS232, i-USB, ne-Ethernet Ports
- 8. Izinzuzo Nemikhawulo Yamachweba akwa-RS232
Ukubaluleka Komlando
Ngaphambi kwe-USB nezinye izixhumi ezibonakalayo ezinesivinini esikhulu, izimbobo ze-RS232 bezibalulekile ekuxhumeni amakhompyutha womuntu kuma-peripherals njengamaphrinta, amagundane, nesitoreji sangaphandle. Idizayini ye-RS232 ivumela ukuxhumana okuphelele kwe-duplex, okuvumela idatha ukuthi ithunyelwe futhi yamukelwe kanyekanye ngoxhumano olufanayo.
Kungani i-RS232 Ihlala Ifanelekile?
Naphezu kokukhula kokuxhumana okusha, i-RS232 isabalulekile ngenxa yobulula bayo, ukwethembeka, nokuhambisana nezinhlelo zefa. Isibonelo, imishini yezimboni nemishini yezokwelapha isathembele kuzixhumi ze-RS232 ezifana ne-DB9 ne-DB25 ngenxa yokuqina kwazo kanye nokuxazulula izinkinga kalula.
Izisekelo Zokuxhumana Kwe-serial
Ukuxhumana nge-serial kuyindlela eyisisekelo yokudlulisa idatha phakathi kwamadivaysi, lapho ulwazi luthunyelwa kancane kancane ngesiteshi esisodwa sedatha. Le nqubo iphambene nokuxhumana okufanayo, okudlulisa izingcezu eziningi ngesikhathi esisodwa eziteshini eziningi. I-RS232 serial communication ithandwa kakhulu ngenxa yobulula bayo, ukwethembeka, kanye nekhono lokumboza amabanga amade kunokuxhumana okufanayo.
I-RS232 Protocol Ichaziwe
Iphrothokholi ye-RS232 iyindinganiso esetshenziswa kabanzi yokuxhumana kwedatha ye-serial. Ichazwa i-Electronic Industries Association (EIA), icacisa izici zokumakhenikha, zikagesi, nezokusebenza zesixhumi esibonakalayo esiphakathi Kwesisetshenziswa Setheminali Yedatha (DTE), njengekhompuyutha, Nezisetshenziswa Zokuxhumana Ngedatha (DCE), njengemodemu. Le nqubo yomthetho ivumela ukudluliswa kwedatha ngesiteshi esisodwa, isekela ukuxhumana okugcwele okuyiduplex lapho idatha ingathunyelwa futhi yamukelwe kanyekanye.
Isebenza kanjani i-RS232?
Izinga le-RS232 lisebenzisa indlela eqondile yokulethwa kwedatha ye-serial. Idatha idluliswa kancane kancane isuka kwenye idivayisi iye kwenye ngokusayinda okukodwa okunamazinga kagesi achazwe ngaphambilini kanye nezivumelwano zokuxhawulana. Isakhiwo se-RS232 siyenza ifanele ukuxhumana okude, okunesivinini esiphansi phakathi kwamadivayisi adinga ukugeleza kwedatha okungaguquki, okuthembekile.
Iphrothokholi ye-RS232 isebenza ngamaleveli esignali achazwe kahle, ukucushwa kwamaphini, nezindlela zokulawula ukugeleza. Ukusetshenziswa kwayo kwezingcezu zokuqala nokumisa kwimodi engavumelanisi kuqinisekisa ukunemba, kuyilapho ukuxhawula ihadiwe nesofthiwe kuvimbela ukuchichima kwedatha. Amandla okuthumela idatha ngezilinganiso ezichaziwe ze-baud namazinga kagesi acacile enza i-RS232 ibe inketho ethembekile, eqinile yokuxhumana kwe-serial kukho kokubili ifa nezinhlelo zezimboni.
Izicelo Ezivamile Zezimbobo ze-RS232
Ichweba le-RS232 lihlala lisetshenziswa kabanzi kuzo zonke izinhlelo ezihlukene zezimboni, ezentengiselwano, nezishumekiwe naphezu kwamazinga amasha okuxhumana. Ukuthembeka kwayo, ubulula, kanye nokwesekwa kokuxhumana okude kwenza i-RS232 ibaluleke kakhulu ezinhlelweni zokusebenza lapho ukuzinza nokuba lula kokuxazulula inkinga kubaluleke kakhulu.
Amadivayisi Wezimboni Nezohwebo
Ezindaweni zezimboni, izimbobo ze-RS232 zibalulekile ekuxhumeni izilawuli ze-logicable logic (PLCs), izinzwa, nezinto zokusebenza. Imbobo ye-serial inika amandla ukudluliswa kwedatha okuzinzile phakathi kwamadivayisi phakathi kwamabanga anwetshiwe, okubalulekile ezimbonini, emigqeni yokuhlanganisa, nezinhlelo zokulawula inqubo. Izibonelo zifaka:
Ukuxhumana kwe-PLC: Ivumela ukulawula okuzenzakalelayo kwemishini.
Amasistimu e-SCADA: Amasistimu okulawula nokutholwa kwedatha ancike ku-RS232 ekudluliseni idatha okuthembekile kusuka kumadivayisi akude.
Izinzwa zezimboni nezinto zokulinganisa: I-RS232 iqinisekisa ukuloga kwedatha okunembile ngezikhathi ezinde.
I-RS232 ku-Networking and Modem Communication
Amamodemu nemishini yokuxhumana bekuphakathi kwabamukeli bokuqala be-RS232. I-RS232 inika amandla ukuxhumana kwe-full-duplex, ivumela idatha ukuthi igeleze kuzo zombili izinkomba ngesikhathi esisodwa, okubalulekile kwezokuxhumana.
Izinhlelo zokusebenza ezibalulekile kulesi sigaba zifaka:
Ukuxhumana kwemodemu: I-RS232 isiza ukuxhumana okuthembekile phakathi kwamakhompyutha namamodemu ekudluliselweni kwedatha ngolayini befoni.
Izimbobo ze-router console: Amarutha amaningi asasebenzisa i-RS232 ekucushweni kokuqala nokuxazulula izinkinga ngokufinyelela ikhonsoli.
I-RS232 kuma-Embedded Systems
Ubulula be-RS232 buyenza ilungele ama-microcontroller namadivayisi ashumekiwe ezinhlelweni ezifana namarobhothi, i-automation, ne-electronics prototyping. Kulezi zilungiselelo, i-RS232 inikeza indlela eqondile yokudlulisa idatha phakathi kwamasistimu ashumekiwe nama-peripherals.
I-Microcontroller interfaces: Izilawuli ezincane zivame ukufaka izimbobo ze-RS232 ukuze zixhumane namakhompyutha ngokuhlela nokulungisa iphutha.
Amasistimu okulawula amarobhothi: I-RS232 isetshenziselwa ukulawula abashayeli bezimoto, izinzwa, nama-actuator kumarobhothi.
Imishini yokuxilonga: Amathuluzi okuxilonga ezokwelapha nawezimoto ngokuvamile asebenzisa i-RS232 ukuze adlulisele idatha ebalulekile.
Umehluko Phakathi kwe-RS232, RS485, kanye ne-RS422 Serial Ports
Ithebula lokuqhathanisa: RS232 vs. RS485 vs. RS422| Isibaluli | RS232 | RS485 | RS422 |
| Uhlobo Lwesiginali | Okukodwa | Umehluko | Umehluko |
| Ibanga eliphezulu | Kufika kumamitha ayi-15 | Kufika ku-1200 amamitha | Kufika ku-1200 amamitha |
| Isilinganiso Sedatha | Kufika ku-115.2 kbps | Kufika ku-10 Mbps | Kufika ku-10 Mbps |
| Uhlobo Lokuxhumana | Khomba-kuya-iphuzu | Ukulahla okuningi (kufika kumadivayisi angama-32) | Iphoyinti-kuya-iphuzu noma i-multi-drop |
| I-Noise Immunity | Phansi | Phezulu | Phezulu |
| Izinhlelo zokusebenza | Amasistimu wefa, amamodemu | I-Automation yezimboni | Ezokwelapha, izinsimbi |
Umehluko omkhulu phakathi kwe-RS232, RS485, kanye ne-RS422 ilele kweyabo izinhlobo zamasignali, ububanzi, amanani edatha, ukusekela kwamadivayisi amaningi, nezinhlelo zokusebenza.
I-RS232 isebenzisa i-single-end ukusayina, okwenza kube lula ukuba kube sengozini yomsindo nokuphazamiseka, kuyilapho i-RS485 ne-RS422 zisebenzisa amasignali ahlukene, ukuthumela amasignali njengamapheya ama-voltage ahambisanayo ukuze kunikeze ukuvikeleka okukhulu komsindo, ikakhulukazi emabangeni amade.
Mayelana ububanzi nesivinini, i-RS232 iyasebenza ezinhlelweni zebanga elifushane, ezikhawulelwe kumamitha angaba ngu-15 kanye namazinga edatha aphansi. I-RS485, nokho, ingasebenza ebangeni elingafika kumamitha ayi-1200, nakuba ihamba ngesivinini esiphansi, iyenze ifaneleke kunethiwekhi yezimboni enwetshiwe. I-RS422 ingaphinda ifinyelele kumamitha angu-1200 futhi, idizayinelwe ukusethwa kwephoyinti-kuya-iphuzu noma okukhawulelwe kokusetha amaconsi amaningi, inikeza amanani edatha aphezulu kune-RS232.
Ngoba ukuxhumana kwamadivaysi amaningi, I-RS485 igqama ngokusekela amadivayisi afika kwangu-32 ebhasini elilodwa, okuyenza ifaneleke kumanethiwekhi okudedela okuningi. Ngokuphambene, i-RS232 ivumela kuphela ukuxhumeka kwe-point-to-point, ikhawulele kumadivayisi amabili, kuyilapho i-RS422 ingakwazi ukuphatha abamukeli abaningi kodwa umshayeli oyedwa kuphela, okuyenza ibe wusizo ekusetheni okudinga ukuxhumana namadivayisi afinyelela kwayi-10.
Mayelana izicelo, i-RS232 isetshenziswa kabanzi kumishini yefa kanye nezinto zikagesi zabathengi. I-RS485 ikhethwa ukuthi isebenze ezishintshayo zasezimbonini ukuze ilawule amadivaysi amaningi ebanga elide, kuyilapho i-RS422 ivamise ukusetshenziswa emishinini yezokwelapha kanye nokuxhumana okunesivinini esikhulu nokungazwani nomsindo endaweni eyodwa kuya kwephuzu.
Umehluko Phakathi kwe-RS232, i-USB, ne-Ethernet Ports
| Isibaluli | RS232 | I-USB | I-Ethernet |
| Isilinganiso Sedatha | Kufika ku-115.2 kbps | Kufika ku-20 Gbps | Kufika ku-10 Gbps nangaphezulu |
| Ibanga | Kufika kumamitha ayi-15 | Ngokuvamile kufika ku-5 amamitha | Kufika kumamitha ayi-100 (ithusi) |
| Uhlobo Lokuxhumana | Khomba-kuya-iphuzu | I-Hub-based, amadivayisi amaningi | Inenethiwekhi, enamadivayisi amaningi |
| Izixhumi | DB9, DB25 | I-USB-A, i-USB-B, i-USB-C | RJ45 |
| Izinhlelo zokusebenza | Imboni, ifa | Ama-electronics wabathengi | Inethiwekhi, i-inthanethi |
Umehluko obalulekile phakathi kwe-RS232, i-USB, ne-Ethernet ungowabo amanani edatha, amabanga okuxhumana, izinhlobo zokuxhuma, nezinhlelo zokusebenza ezijwayelekile. I-RS232 isebenza ngesivinini esingaphansi, ngesilinganiso esiphezulu esingu-115.2 kbps, okuyenza ilungele ukuhwebelana kwedatha okulula. I-USB, ngakolunye uhlangothi, inikeza amanani edatha ashesha kakhulu, ne-USB 2.0 efinyelela ku-480 Mbps kanye ne-USB 3.x esekela kufika ku-20 Gbps, okuvumela amadivayisi ukuthumela idatha ngokushesha. I-Ethernet idlula kokubili ekucushweni kwebhizinisi, ngesivinini esingu-10 Gbps noma ngaphezulu, okuyenza ifaneleke ezindaweni ezinenethiwekhi ezidinga ukugeleza kwedatha okusheshayo nokungaphazamiseki.
Uma kufika ububanzi, I-RS232 ikhawulelwe kumamitha angu-15 futhi isekela kuphela amadivaysi amabili, iwukhawulela ekusebenziseni ibanga elifushane. I-USB, evamise ukuba ngamamitha angu-5, ingaxhuma amadivaysi amaningi ngamahabhu. I-Ethernet, nokho, isekela amamitha angaba ngu-100 phezu kwezintambo zethusi, inweba nakakhulu nge-fiber optics, iyenze ibe ilungele ukuxhuma amabanga amade kumanethiwekhi ehhovisi nezimboni.
Mayelana izinhlobo zokuxhuma, I-RS232 isekela kuphela ukuxhumana kwe-point-to-point, okukukhawulela ekufakweni kwamadivayisi amabili. I-USB inikeza ukuxhumana okusekelwe kuhabhu, okuvumela amadivayisi amaningi ukuthi axhumane ngembobo eyodwa. I-Ethernet ivumela ukunethiwekha kwamadivayisi amaningi, njengoba amarutha namaswishi exhuma amadivaysi amaningi ngaphakathi kwenethiwekhi.
I-RS232 isetshenziswa kakhulu kumadivayisi asendulo nawemboni adinga ukuxhumana kwedatha okulula, okuthembekile. I-USB isetshenziswa kakhulu kuma-electronics abathengi, ikakhulukazi kuma-peripherals njengamakhibhodi, amaphrinta, namadrayivu angaphandle. I-Ethernet ibalulekile ezindaweni ezinenethiwekhi, ivumela ukuxhumana kwe-inthanethi enesivinini esikhulu kanye ne-LAN kuzo zombili izilungiselelo zokuhlala nezokuhweba.
Izinzuzo kanye nemikhawulo ye-RS232 Ports
Izimbobo ze-RS232 bezilokhu ziyisisekelo ekuxhumaneni kwe-serial amashumi eminyaka, ikakhulukazi ezisetshenziswa ezinhlelweni zefa, i-industrial pc China imishini, nemishini eshumekiwe. Ngaphandle kokukhuphuka kwamazinga amasha njenge-USB ne-Ethernet, i-RS232 isasebenza ezinhlelweni ezithile ngenxa yezinzuzo zayo ezihlukile kanye nemikhawulo ethile.
Izinzuzo zamachweba we-RS232
Ubulula: I-RS232 iyiphrothokholi eqondile, ilungele izinhlelo zokusebenza ezidinga ukuxhumana okuyisisekelo, okunesivinini esiphansi ngaphandle kokusetha okuyinkimbinkimbi. Izingxenyekazi zekhompiyutha kanye nezidingo zesoftware zincane, okwenza kube lula ukuzisebenzisa nokuzisebenzisa.
Ukumelana Nomsindo: I-RS232 isebenza ngebanga lamandla kagesi abanzi (-3V ukuya ku--15V ngokunengqondo okuthi “1” kanye no-+3V ukuya ku-+15V ngokunengqondo okuthi “0”), okunikeza isivikelo ngokumelene nokonakaliswa kwesignali nokuphazamiseka. Lesi sici sizuzisa kakhulu ezindaweni zezimboni lapho umsindo uvamile. Lesi sici sizuzisa kakhulu ku amaphilisi okukhiqiza phansi, lapho kuvame khona umsindo.
Ukuthembeka: Ukusetshenziswa kwesikhathi eside kwe-RS232 ezinhlelweni zefa kufakazela ukuqina nokwethembeka kwayo. Kubhekwa kabanzi njengezinzile futhi ebikezelwayo, enamazinga amaphutha amancane, okuyenza ifanele imishini efana amalaptop ezempi ayathengiswa lapho ubuqotho bedatha bubalulekile.
Izindleko: Amadivayisi ahambisana ne-RS232 namakhebuli ngokuvamile awabizi futhi atholakala kabanzi. Lokhu kusebenza kahle kwezindleko kwenza i-RS232 ibe ukukhetha okungokoqobo kwezinhlelo zokusebenza ezingadingi amanani aphezulu wedatha noma amabanga amade.
I-Point-to-Point Communication: Uxhumo lwephoyinti nephoyinti lwe-RS232 luvumela ukuxhumana okuzinikele phakathi kwamadivayisi amabili, okunganciphisa ubunkimbinkimbi benethiwekhi kanye nokushayisana kwedatha okungaba khona okutholakala kumanethiwekhi wamadivayisi amaningi.
Imikhawulo ye-RS232 Ports
Izinga Ledatha Eliphansi: Isilinganiso esiphezulu sedatha ye-RS232 sicishe sibe ngu-115.2 kbps, ehamba kancane kakhulu kumazinga esimanje njenge-USB (kufika ku-20 Gbps) ne-Ethernet (10 Gbps noma ngaphezulu). Lesi silinganiso sedatha esiphansi sikhawulela ukufaneleka kwe-RS232 yezinhlelo zokusebenza ezidinga ukudluliswa kwedatha ngesivinini esikhulu, njenge i-industrial pc ene-gpu.
Ibanga Elinomkhawulo: I-RS232 ikhawulelwe kumamitha ayi-15 ngaphansi kwezimo ezikahle, okuyenza ingafaneleki ukuxhumana nebanga elide. Lesi sivimbelo sikhawulela ukusetshenziswa kwaso ezinhlelweni ezinkulu noma ezisatshalaliswe kabanzi, njenge i-advantech rackmount pc ukufakwa.
Ukuxhumana Kwedivayisi Eyodwa: I-RS232 isekela ukuxhumana kwephoyinti nephoyinti kuphela, okusho ukuthi ingaxhuma amadivaysi amabili nje. Ngokungafani ne-RS485, evumela amadivaysi amaningi emugqeni owodwa, i-RS232 ayilungele izinhlelo zokusebenza ezidinga ukudedelwa okuningi noma ukuxhumana kwenethiwekhi, njengalezo ezibandakanya 2u i-industrial pc.
Izixhumi zeBulky: I-RS232 ivamise ukusebenzisa izixhumi ze-DB9 noma ze-DB25, ezinkulu nezilula kancane uma ziqhathaniswa nezixhumi ezihlangene ze-USB ne-Ethernet. Lokhu kungenza i-RS232 ibe inselele ukuyisebenzisa kumadivayisi ahlangene, anomkhawulo wesikhala, njengawo lunchbox pc ukusetha.
Izidingo Zamandla: I-RS232 ayinawo amandla okuletha amandla phezu kolayini wedatha, ngokungafani ne-USB, enganika amandla amadivayisi axhunyiwe. Lo mkhawulo udinga umthombo wamandla owengeziwe, okwengeza inkimbinkimbi ezimeni lapho ukulethwa kwamandla phezu kolayini wokuxhumana kungaba yinzuzo kuwo imboni panel pc odm amadivaysi.
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