Mene ne COM-tashar jiragen ruwa? A na'ura, COM-tashar jiragen ruwa management

COM-tashar jiragen ruwa, ko serial tashar jiragen ruwa ne mai kusurwa biyu serial dubawa, wanda aka tsara domin byte data musayar. A karo na farko, da tashar jiragen ruwa amfani to connect wani m sa'an nan zuwa modem, da kuma linzamin kwamfuta. Yanzu shi ne fiye da amfani to connect da uninterruptible samar da wutar lantarki da kuma don sadarwa tare da hardware aiki kwamfuta tsarin saka irin.

da yin amfani da

Saboda haka, kafin ka yi magana game da abin da wani COM-tashar jiragen ruwa, dole ne ka duba a cikin gabata domin fahimtar ma'anarta. Kamar shekaru 15 da suka wuce, da hanyar amfani to connect na'urorin kwamfuta via musamman misali connector located a baya na shasi amfani na musamman serial RS-232 na USB. Wannan hanya na da yawa rashin. Irin wannan na USB, ta zamani matsayin, na samar da wani sosai low data kudi - game da ɗaya da ɗari kilobits da na biyu. Bugu da kari, a lokacin da yin jiki dangane da haɗin suna bukatar a aiwatar da kashewa da kayan aiki, kuma sun kasance a haɗe da juna ta hanyar sukurori, don tabbatar da AMINCI, yayin da su size ne na babba darajar.

A kadan tarihi

COM-tashar jiragen ruwa a kan sa'an nan kwakwalwa al'ada sa lambar 1 ko 2, kamar yadda su ne yawanci ba fiye da biyu. Za ka iya shigar da ƙarin tashoshin jiragen ruwa idan da bukatar tashi. Lokacin da mai amfani da software saitin ake bukata don kauce wa rikice da kuma daidai kafa shi ne daya da cewa ta haɗu da zama dole kayan aiki. Kowane COM-tashar jiragen ruwa saituna bukatar da daidai kudi na watsa bayanai, kazalika da yawan wasu cryptic sigogi na wanda aka sani kawai zuwa kunkuntar da'irar kwararru. Don haɗa da kayan aiki don cin nasara, duk da zama dole sigogi da ake bukata wani wuri zuwa koyi ko karba gwaje, kamar yadda a cikin wannan hali, babu wani atomatik sanyi. Bugu da kari, dangane via COM-tashar jiragen ruwa na iya a haɗa da duk wani software da wani waje kayan aiki, ko da quite saba, wanda shi ne dalilin da ya sa a kan aiwatar da saitin da akwai da yawa daga kurakurai.

wayewar

Yanzu connection via COM-tashar jiragen ruwa gaba daya share ta more zamani hanya, wanda ba ya bukatar musamman da ilmi ga aiwatar da su, wato ta hanyar kebul-tashar jiragen ruwa. Wannan hanya ne bã tãre da duk drawbacks aka ambata a baya. Duk da haka, yanzu nagartacce karfinsu dangane da duk wani nau'i na GPS-kayan aiki da kuma sosai iri-irin software kafa na dogon lokaci a kusa da manufar COM-tashoshin jiragen ruwa da suka dauka na yanzu tsaoho.

Wannan ya shafi gaskiyar cewa da farko kusan duk wani kayan aiki, ciki har da GPS, ya waje, da kuma ta dangane da kwamfuta yi da serial USB da aka haɗa daya daga cikin hardware mashigai. Daga mai amfani a cikin sanyi tsarin da ake bukata a zabi daidai da tashar jiragen ruwa da lambar kuma data translation gudun a kan shi. A wancan lokaci, akwai babban data misali daga GPS-mai karɓar ga shirin, yanzu kira NMEA-0183. A gaskiya, wannan misali na bukatar duk developers, har ma da na zamani da kuma hardware software don sadarwa ta hanyar da COM-tashar jiragen ruwa. Kuma duk wannan a fuskar abin da zamani kwakwalwa, kazalika da CPC, ya dade da mafi yawa a kebul na misali. Kuma wani alama ne da cewa kwanan nan GPS-karba suna ƙara ya fara da za a shigar kai tsaye a cikin yadi cewa shi ne gaba daya ba a nan na da wani dangane USB tsakanin shi da kuma babban na'urar.

Virtual COM tashoshin jiragen ruwa

Hanyar fita da aka kirkiro, wato wajen samar da wani "mai rumfa» COM-mashigai. Sai dai itace cewa da ciki na hannu na'urar, misali, GPS-mai karɓar ne abunda aka kwaikwaya a software kamar yadda COM-tashar jiragen ruwa, yayin da wadanda ba kasancewa a cikin hardware sharuddan. A cikin wannan shirin, wanda aka tsara domin interfacing ta kama misali, babu bambanci da yadda aka aiwatar. Akwai iya zama da gaban da rumfa kwaikwaiyo, kuma ba dole ba ne kasancewar wani hardware aiwatar. Saboda haka yana yiwuwa don tabbatar da karfinsu na haihuwa model GPS-software da kayayyakin zamani.

da canje-canje

A lokaci guda manajan da COM-tashar jiragen ruwa ya canza ba muhimmanci. A tsohon mai amfani dole yi hadaddun saitin kusan hannu. Duk da haka, da zamani COM-tashar jiragen ruwa wakiltar ba ƙato na'urar da aka sanya a kan raya panel na tsarin naúrar, da kuma gaba ɗaya daban-daban na'urar. Kuma a sa'an nan dukan abu ne cewa daga cikin software ra'ayi, duk su ze m dadada rai, da cewa shi ne, babu wani bambanci tsakanin mai rumfa da real mashigai. Domin software tashar jiragen ruwa lambobi bambanta kawai a cewa suna sanya wa PDA masana'antun gaba daya bazuwar akai. Alal misali, da mai karɓar daga Asus yawanci located a kan COM5, kuma PocketLOOX 560 ya nuna a mai karɓar for COM8. Sai dai itace cewa a shirin cewa yana so ya samu daga GPS-mai karɓar data yana da farko ba abin dogara da bayanai a kan ganewa lambar karkashin abin da tashar jiragen ruwa bayyana, suka yi rijista domin daidai mai karɓar a kan wannan PDA.

Ta yaya duk wannan aikin?

Tare da cewa, za ka iya gudanar da wani atomatik search for dace hanya irin binciken da duk samuwa COM-tashoshin jiragen ruwa ne fairly unreliable da quite amfani da tsauraran matakan. Wannan shi ne saboda gaskiyar cewa na'urar da aka nuna a cikin tsarin a matsayin COM-tashar jiragen ruwa, na iya zama quite bambancin da kuma ba za a alaka GPS, za su iya zama quite unpredictable amsa wannan binciken. Alal misali, PDA ne tashoshin jiragen ruwa hade da ciki salula modem, tare da kebul, infrared tashar jiragen ruwa, kazalika da sauran abubuwa. Koyar da su wani shirin tsara don aiki tare da wani takamaiman na'urar, zai iya kai wa ga wata gaba daya unpredictable halayen, kazalika da wa daban-daban malfunctions cewa sau da yawa yana sa rataye PDA. Wannan shi ne dalilin da ya sa yunkurin bude COM-tashar jiragen ruwa za su iya kai wa ga m yanayi har zuwa kunna aikin Bluetooth ko Infrared tashar jiragen ruwa. Kuma akwai iya zama mafi m lokuta.

Jobs COM-tashar jiragen ruwa

Domin COM-tashar jiragen ruwa da ake amfani a matsayin dalilin wani asynchronous duniya transceiver guntu. Wannan guntu samuwa ne a dama da dadin dandano: Intel 16550A, 16550, 16450, 8250. Ga kowane COM-tashar jiragen ruwa ta qunshi wani mai karɓar rajista da kuma bayanan watsawa da wani yawan iko rajista cewa za a iya isa ga ta cikin BIOS, Windows da kuma MS DOS. A cikin sabuwar siga na guntu yana da wani sa na buffers ga dan lokaci adanar da daukar kwayar cutar da samu bayanai. Tare da wannan damar, za ka iya katse aiki na CPU kasa akai-akai, kazalika da wa tsara data kudi na watsa shirye-shirye.

Babban sigogi

COM-tashar jiragen ruwa na'urar kwakwalwa gaba da wanzuwar irin wannan halayyar fasali:

- tushe adireshin tashar jiragen ruwa na inputting da outputting bayanai;

- hardware soke yawan;

- da girman da daya block na bayanai;

- cikin kudi a wadda data yana daukar kwayar cutar.

- mutunci yanayin gano.

- kwarara iko Hanyar.

- yawan tasha ragowa.

Yadda za a duba COM-tashar jiragen ruwa a kan kwamfutarka? Abin da ya nemi?

Kamar yadda aka ambata a baya, irin wannan tashar jiragen ruwa ne mai bi-directional dubawa for watsa bayanai a bit matakin a wani m hanya. A rarrabe a kwatanta da wani layi daya tashar jiragen ruwa a nan shi ne canja wurin bayanai bit ta bit. COM-tashar jiragen ruwa haltta shi ne irin abin da kwamfuta ya aikata ba ya kadai yana amfani da serial watsa bayanai Hanyar. Alal misali, musaya kamar Ethernet ko USB, kuma amfani da wannan manufa, amma saboda haka ya faru a tarihi cewa serial kira shi da misali RS232 tashar jiragen ruwa.

An sau da yawa ake bukata don bude COM-tashar jiragen ruwa don gyara da kuma kwamfuta ganowa, alhãli kuwa shi ne ma wajibi ne don duba a kan yi. Ku ƙõne kashi, domin shi ne mai sauqi qwarai. Wannan na faruwa mafi sau da yawa lalacewa ta hanyar mai amfani wanda ya zo da ba daidai ba cire na'urar, ja da connector lokacin da aka haɗa da ke dubawa. A sauki hanyar gwada dubawa yi ne don ka haɗa da ita tare da linzamin kwamfuta. Duk da haka, wannan da wuya a samu wani cikakken hoto, tun da jan kafar amfani kawai da rabi na siginar Lines na takwas. Kawai amfani da musamman toshe da kuma ba da damar da shirin duba yi. A saboda wannan dalili ya riga ya kasance musamman da suka ci gaba software.