Dekedda Serial iyo habboonaanta

Haddaba bal maqal "dekedaha on computer" ereyadan, uma baahnid inaad u baahan tahay in dukaamada qaaska ah u tagaan, ama noqon milkiilaha of technology kombiyuutarka. Ka dib oo dhan, xataa ardayda dugsiga hoose ay si fiican u yaqaanna xaalkan.

At erayada "dekedda" nin waxaa inta badan wakiil booska la wiish oo sarsare oo doonniyaha weyn galaan, waxyaabaha bixinta iyo loading alaabta. In computer injineernimada aqbasho dekedda wax soo saarka waa mid ka mid ah noocyo ka mid ah interface hardware loogu talagalay in lagu xiro qalabka gudaha iyo durugsan in xogta baska motherboard ah. Tan iyo muuqaalka kore ee kombiyuutarada ugu horeysay ayaa loo soo jeediyay tiro badan oo ah dekedaha kala duwan oo ku kala duwan yihiin labada fulinta jirka iyo hab maamuuska loo isticmaalo. Qaar ka mid ah ayaa ka badbaaday iyo waxaa loo isticmaalaa tan iyo maanta. Tusaale ahaan, a dekedda serial, saarayaasha badan oo motherboard ayaa mar kale unsoldering on waxyaabaha ay.

Waa maxay waxa ay si cajiib ah? Asynchronous dekedda serial (mararka qaarkood loo yaqaan COM, ka Ingiriisi. Word «Communications») muuqday in lagu daydo ugu horeysay computer IBM-socon. Waxaa loo adeegsaday in ay ku xidhmaan jiirka, modem iyo aaladaha kale ee ka durugsan, iyo ururka (baahan yahay cable waxba kama-modem), xidhiidh network fudud u dhaxaysa laba kombiyuutarada. Mid ka mid ah faa'iidooyinka ku hantiyeen by dekedda serial waa daacad u ah fulinta hardware iyo software ah.

Jir ahaan, waxaa wakiil isku xira 9 ama 25-pin. gudbinta Data meel u yara by yara, israac (kadis ah, kii labaadna wuxuu ahaa halkan magaca). Protocol ma hoos gasho mar kasta oo xad bareeg u dhexeeya 16 gelinno kasta (2 bytes). Thanks to feature this, dekedda serial waxaa mararka qaarkood loo yaqaan asynchronous.

Waa in la ogaadaa in macluumaadka heerka yara ayaa weli nidaaminaya. Sidaas darteed, in hirgelinta ah hardware caadiga ah, loo oggol yahay heerka 115.200 gelinno per labaad (DDB), inkastoo nidaamyada caadiga ah Windows ka hawlgala waxaa kiimikaysan ku koobnayn 9600 (user ka dhigi kartaa hagaajin maamulaha qalabka). Si ka duwan interfaces kale serial (USB, FireWire) gelinno la ururiyey galay xirmooyin, oo lagu kala qaado ee qaybood.

A interface USB caadi ah ayaa loo hirgeliyey iyada oo ujeedadu of saareen suuqa ka mid ah da 'dekedda COM (Rs-232C). Talaabadani waxay ahayd lama huraan, tan iyo xawaaraha kala iibsiga xogta ee kala duwan ugu wax soo saar ahaa Baud kaliya 921.600, oo aan ahaa ku filan (marka la barbardhigo USB iyo 480 Mb / s). khasaare labaad - ma suurtowdo in la xidhiidha "kulul": isku day ah in ay ku xidhmaan qalabka dekedda serial markii computer waxaa socda keentay in kiiska ugu fiican ee aan awoodin inay shaqeeyaan la'aan koronto & Play technology, iyo ugu xun - in failure oo ka mid ah qalabka iyo dirato labada dekedda COM on motherboard (card ballaarinta) ah.

Taas darteed, dhawr sano ka hor, oo dhan kaararka saartay aadan haysan dekedda COM ah, sida ku dhacay la PS / 2 iyo AGP. Si kastaba ha ahaatee, tiro badan oo ah xorroyad jira loogu talagalay in la dekedda serial shaqeeyaan, saarayaasha lagu qasbay in ay dib ugu COM iyo xataa LPT (isku midka ah). Shaki kuma jiro, dadka isticmaala badan ayaa waxay u sheegeen "mahadsanid". Ka dib markii biligleynaya aqbalana satellite ah hadda wax loo baahan yahay in la raadiyo computer duug ah ama iibsato adapters raaxo, inverters. Intaas waxaa sii dheer, barnaamijyo ugu ayaa sidoo kale ku shaqeeya dekedda serial, sida barnaamijyada gacanta qoraal ma keento dhibaato aad u badan isaga.

Waxa xiiso leh in in badan oo maanta xorroyad si sax ah in nidaamka qalliinka shaqeeyaan hoggaansamaa a dekedda COM. Tani telefoonada gacanta, idaacadaha, adabtarada Bluetooth ah , iyo kuwa kale. Dabcan, dabeecadaha dekedda dalwaddii waa ka sii badan hirgelinta caadiga ah.