RS-232: muchidimbu neezvitendero hukuru uye mhando

Munyika mune akawandisa cheap car insurance, cheap car insurance, interfaces. Ziva kwavari kuti vazive zvose vanhuwo User kwakaoma zvisingaiti. Kana mutsva yasarudza kuunganidza ravo pachavo kombiyuta, pane mibvunzo yakawanda pamusoro kugarisana. Nhasi tinodzidza kuti RS-232 kwakadaro interfaces.

pfungwa

Kana watarisana yokuti hauzivi kuti connector mhando uye chii kuti, ipapo isu anofanira kunzwisisa gare gare ichi. mureza Izvi zvinoshanda mumuviri rukoko uye akanga zvakangonyuka "shamwari" asynchronous inowanikwa. Kakawanda, vachiyeuka RS-232, nyanzvi nezvemwoyo PC Serial chiteshi.

Zvakangoitikawo kuti akanga rinowanzoshandiswa pasango foni. Zvino tinoziva kuti kuonga zvose kuti kukura makombiyuta. Hwakabatana kuti PC kana kuti Kusabatsira mukuru mashoko rates, uyewo nemasiraidhi akapendwa kana mudziyo asiri kure kure. Kana takatarisana kombiyuta chinzvimbo basa kana varaidzo, RS-232 interfaces inotsiviwa kuti USB.

nyaya

Pakati pezana remakore rapfuura zvakatanga kushingaira kusimudzira ruzivo, kunyanya foni. Ose kambani kuti mubasa kugadzirwa zvimwe zvokushandisa, kwakasimbiswa yayo mureza date hutachiwana. Nokudaro, kushandisa kwakadaro mano kwave kwakaoma, sezvo paiva nezvinetso kugarisana.

Kugadzirisa nyaya iyi zvachose uye fananidza zvose kuti kare akawana, muna 1962 akaronga sangano chairo. Chakasimudzira akaumba kurumbidza nokuda mugadziri, uyo ainzi "Recommended Standard 232". Nokuti pane chikonzero kuumba RS-232 interfaces.

Zvino unhu yeEncoding rinongoitwa kubva 5 kusvika 8 matomu. voltage chiratidzo haana hwokukurira 25 V uye kwete pazasi -25 V. Zvaiita kuronga basa anonongedzera, izvo kazhinji hazvo kushandiswa. Data kutapukirwa kunoitika muna modes zviviri: synchronous uye asynchronous. Nemhaka zvose hwakagadzwa kuita mureza zvakakwana wakanyatsokodzera kuti Telecom michina.

budiriro

Mumakore manomwe chete pashure pakuvambwa mushanduro itsva yakatanga kuonekwa. RS-232C kwave rakadzokororwa chokuita zvose zvazvakaipira kuti akawana panguva ino. Kwakasarudzwa kugadza DB25 connector 25 Pin. Ipfungwa ichi rava zvechokwadi "basa zvatinokanganisa," wadii kuchinja nguva yacho nguva uye akava hwaro kwemakore anouya.

Nechekare muna 1983, zvakazivikanwa bv vachishandisa mutemo uyu. Takatanga kushandisa UART transceiver. Mumwe novelties atova 4 wokutepfenyurisa, makatumidzwa ru-pachiteshi.

Pokumuka zvinodiwa zvakadai vakatanga kuwana tichimhanya. Manufacturers vakaziva nheyo chiito mumamiriro ezvinhu akadaro, saka akatanga kurasikirwa Association dzaanodzora. Muna 1986, RS ikaita EIA. Kana kodzero makambani vakatamira kune rimwe, ndiwo vaviri Misiyano mureza akasunungurwa. Kazhinji, hapana chitsva uye haina rakatangwa muna RS-232 interfaces.

basa

Nemhaka mureza ichi, zvakakwanisika uchatamisa umboo kana chinokosha anonongedzera pakati namano maviri, rimwe riri chinouraya, uye wechipiri - kukurukurirana. Kutapukirwa Zviri 15 metres, uye kufadza nokukurumidza inogona kusvika 115200. Sezvineiwo, inowanikwa iri nyore kushandisa uye zvirongwa. Ini rinowanzoshandiswa kana uchida kuwedzera kure. Nyanzvi anongoti proportionally kuderedza nokukurumidza.

zvinangwa

Zvinozivikanwa kuti Serial RS-232 inowanikwa yakatanga kushandiswa raundi-up Modem kusvikira PC. Nokuda kwaizvozvi, nokukurumidza akava pedzidziso dzekutanga, pakati yaiva yoga mutsetse "Call". Nokufamba kwenguva, Indaneti vakachinja Soup connectors uye simbi kwakabatana Via USB. Pachake akafuratira kubatana haana kubviswa pamwe inowanikwa panel, saka dzimwe vagadziri vakasarudza kusika zvavanoshandisa enderana netambo kubatanidza negadziriro. Saka, havana pakuzivikanwa kombiyuta mbeva pamwe RS-232.

Zvino inowanikwa zvikuru mune zvikuru kushandiswa mudziyo, maindasitiri midziyo uye microprocessor enyika. Somugumisiro, mune ano netbook kana notibhuku RS-232 inowanikwa wire kushanda zvikasaitika. Asi vamwe motherboards mira gadziriro achine connector ichi. Somugumisiro, pane zvose chete slots uye chinogumbura Daisy pamusoro motherboard. To connector uyu asina maturo, vamwe zvinopa converters.

inoshanda

Zvinozivikanwa kuti kuongororwa hunhu chinhu renguva duplex inowanikwa. It transmits date somunhu asynchronous Serial inowanikwa. Maererano waya uchipfuura binary chiratidzo, izvo akagamuchira maviri voltage mumatunhu. Izvi ndozvazvakaita mashoko hutachiwana.

Kana isu funga akanyatsorongwa zviratidzo, zvino kune "razero" correlated zvakanaka voltage, uye kuti "kubatana" - zvakaipa. To mamiriro uyu wakashanda sezvinotevera Developers vanoshandisa vakawanda machipisi "danda". RS-232 interfaces yemanyorero vane mwero kwete chete kwezvavakaisa goho mitsetse, asiwo chinokosha upiyona njanji, kudzora kuerera kubva kurutivi Hardware uye chengetedza chaizvo mabasa.

mitsetse

Zvinofadza kuti pachiteshi iri akashongedzerwa ane mhando D, peji 25 neshamwari. Mumwe ane pachake chekawo rayo uye kutungamirirwa. Vane zvizere zita uye vane basa rimwe noruzhinji. Saka ari inoparadzirwa uye akagamuchira mashoko chikumbiro uye kupararira Reset, akanaka uye akaipa voltage, iyo inogara muoti, mugamuchiri yaunonyanya kushandisa, kuti Ringer chinoratidza, etc.

makirasi

Kana tine chirwere mudziyo, ipapo chichagamuchirwa vakagadzirira pamwe connector neshamwari, kana zvakabatanidzwa - the mawindo. Vorudzii vakaita mureza nzvimbo, asi dzimwe nguva pane kusaina. Anonongedzera RS-232 inowanikwa kwokubatana akakamurwa makirasi.

Anotevedzana zvinhu akadai TXD, kushanda yakazvimirira gwara Serial yokukurukurirana, iyo rakakamurwa nesekondari. Lines basa achitumira mashoko uye nokugamuchira nayo.

Kugadzirisa mhando RTS ane shoko kubvuma rokuremekedza. It is nzira iyo chiratidzo kubva Serial kukurukurirana mutsetse kutanga kukurukura nevanhu okuteerera hutachiwana pamberi chaiwo. Pane yaunonyanya kushandisa kirasi. In nzira iyi, iyo midziyo wokushandura anonongedzera kune mumwe, izvo anobvumira kurerutsa kuchinjwa panguva decoding.

converters

Tisati kubata convert RS-232, zvinokosha kuziva pfungwa chii uye zvaunoda. Kuti izvozvo zvakajeka, kuti convert - adapteri ichi. Pakadaro, kana mudziyo ane chete connector, asi iwe unofanira mumwe, unogona kungoti kutenga imwe adapteri. Saka, zvose zviri cheap car insurance zvakafanira kana kuva zvakakodzera, kana havambokwanisi atore nzvimbo rakawandisa.

Kwatiri, zvinokwanisika kushandisa midziyo hwakabatana interfaces RS-232/422/485 ru-zvengarava. Zvinoguma galvanic voga mitemo, kupararira mashoko kunoitika pasi ezvinhu anonetsa remagetsi chipingaidzo. Dambudziko hazvisi wakakodzera chete chokuti nyore kubatana hazvina kukwana, unofanira kugadzira software revarombo.

Kazhinji, yakasiyana michina inodiwa Data kupararira yayo chaiyo rwokugadzira. Naizvozvo, zvinokosha kuti vashande pamwe vabatane chete protocols kushandurira mashoko kupinda rimwe maonero chete kana convert - hazvibviri. Basa adapteri ichi ndechokuti ingangova yakatorwa mhando mashoko ari chinopfuudzwa pakati zvimwe zvikamu hurongwa rinokosha rwokugadzira.

Saka packet kubudiswa rinopfuura pa chirongwa danho. Chirongwa anochinja maumbirwo zvokuvakisa, izvo zvitange, anoshandisa yakasiyana Protocol.

kupatsanura

Zvinofadza kuti chero convert RS-232 inowanikwa (etherne nevamwe) inogona dzinoratidzwa parameters akawanda. Saka, kuona mureza midziyo uye protocols mhando. Uyewo kufunga date zvazvingava, izvo kuona kufadza nhamba zvinhu pamusoro nguva.

Akatevera parameter - zvinokwanisika hutachiwana kure, pahwaro kunonyanyisa kure mumwe raiva pedyo nebundu, izvo zvinogona nekufambisa mashoko pakati pachavo, asi apo akaperera kwayo. Kupfuudzwa mutsetse anomiririrwa svikiro, uye apo chete mashoko ari inoparadzirwa. Pakati parameters inhamba "matanda" uye vagamuchiri, uyewo zvibvire kuongorora redunhu "konektinga" chikuru zvinoriumba.

mienzaniso

To RS-232 anoshanda zvakanaka tandem pamwe RS-485/422 interfaces, unofanira kuwana kwete convert uye chirongwa zvakanaka. Zvinokosha kuyeuka kuti kwete zviteshi zvose zvinobatanidzwa, saka 10 ndiyo chete nhatu wokushandura / vanogamuchira mashoko uye chiratidzo pasi. Somugumisiro, kutendeuka muitiro pachayo anomiririrwa ikakuruma-kubudiswa Data kubva fomu mumwe. Panguva iyi, hapana dzakati kutendeuka kunoitika se shanduko "huni" I / O chiteshi.