isiZulu
I-USB Camera Hot-Plug Kumadivayisi Ahlanganisiwe: Izinselele, Izixazululo Nokuthambekela Kwesikhathi Esizayo
Kwadalwa ngo 08.11
Okufingqiwe
Amakhamera e-USB ayizingxenye ezibalulekile zokubuka kwamaphaneli okulawula ezimbonini, imishini yezokwelapha, amasistimu okuzijabulisa ezimotweni, namasango e-IoT. Ngokungafani namapulatifomu amadeskithophu, amasistimu ashumekiwe asebenza ngezinsiza zehadiwe ezinomkhawulo, izidingo eziqinile zokusebenza ngesikhathi sangempela, izakhiwo zesofthiwe nehadiwe ezenziwe ngokwezifiso, nezimo eziqinile zokusebenza ensimini. Lezi zici ezingokwemvelo zivame ukuholela ekuziphatheni okungazinzile kokuxhuma noma ukukhipha, amaphutha okuhlola, nokungahambi kahle kwesistimu kuma-amakhamera e-USBLeli phepha lihlaziya ngokohlelo umehluko wobuchwepheshe wokuxhuma nokukhipha ikhamera ye-USB phakathi kwezinhlelo ezishumekiwe nezedeskithophu, lihlela izinselelo ezijwayelekile zobunjiniyela ekusetshenzisweni okungokoqobo, lifingqa izixazululo zokuthuthukisa eziqinisekisiwe emkhakheni, futhi lihlola izitayela zokuthuthuka esikhathini esizayo. Linikeza umhlahlandlela wobuchwepheshe osebenzayo konjiniyela ukuze baklame futhi basakaze izinhlelo ezishumekiwe ezithembekile ezinomsebenzi wokuthwebula ividiyo nge-USB.
1. Izisekelo Zokuxhuma Nokukhipha Ikhamera Ye-USB Nokwethulwa Komongo Wohlelo Olushumekiwe
I-USB hot-plugging iyisici esijwayelekile se-plug-and-play esivumela abasebenzisi ukuthi baxhume noma banqamule amadivaysi angaphandle ngaphandle kokuvala uhlelo olusebenzayo (host system). Lokhu kusebenza kuncike enqubweni ye-enumeration eyakhelwe ngaphakathi ku-USB protocol. Uma ikhamera ye-USB ifakwa, i-embedded host ithola ukuxhumana kwehardware, ifunda ama-device descriptors abalulekile okuhlanganisa i-vendor ID, i-product ID kanye nohlobo lwedivayisi, ilayishe ama-driver modules afanele, futhi iqedele ukuqaliswa kwedivayisi nokucushwa kokusebenza kwayo. Uma ikhamera inqanyulwa, uhlelo lukhipha ama-driver afanele futhi lukhulule imemori esetshenzisiwe, ama-interrupts nezinye izinsiza zohlelo.
Amasistimu edeskithophi athola ukuxhunywa okuzinzile nokungenazihibe ngokusebenzisa izitaki ze-USB ezivuthiwe zama-operating system ajwayelekile, izinsiza eziningi zokucubungula nokugcina, kanye nemiklamo yehadiwe enezinga eliphezulu lokujwayeleka. Ngokuphambene, amasistimu ashumekiwe abhekana nokulinganiselwa okungokwemvelo. Izinsiza ze-CPU ne-RAM ezilinganiselwe, ukuhlela kwemisebenzi yesikhathi sangempela okuphoqelekile, ama-SoC nama-USB controllers enziwe ngokwezifiso, kanye nezimo zokusebenza eziyinkimbinkimbi nezinzima, konke lokhu kuphendula ikhono elilula lokuxhuma nokusebenza ngokuzenzakalelayo libe umthombo oyinhloko wokungazinzi kwesistimu ekuthuthukisweni kwemikhiqizo eshumekiwe.
2. Umehluko Oyisisekelo Ekuxhumeni Nokukhipha Ikhamera Ye-USB: Amadivayisi Ashumekiwe vs. Izinhlelo Zedeskithophu
Umehluko oyisisekelo phakathi kwezinkundla zedeskithophu nezishumekiwe uyimbangela eyinhloko yokungazinzi kokuxhuma nokukhipha ikhamera ye-USB ezimweni ezishumekiwe. Ithebula elilandelayo liqhathanisa ngokucacile umehluko oyisisekelo:
Isici | Amasistimu E-Desktop | Amadivayisi Ashumekiwe |
Ukutholakala Kwezinsiza | Izinsiza ezanele ze-CPU, i-RAM nesitoreji; ukulayisha nokukhipha amadrayiva ngeke kubangele ukulahlekelwa okusobala kokusebenza noma ukushintshashintsha kwemisebenzi. | Izingqinamba eziqinile zezinsiza; imisebenzi yamadrayiva eqalwa ukufakwa noma ukukhishwa kwezinto kungabangela ukukhuphuka kwe-CPU, ukusetshenziswa kwememori kanye nezinkinga zohlelo. |
Ukuqaliswa Kwe-USB Stack | Ama-USB stack agcwele, avuthiwe futhi asebenza kahle ku-Windows nakuma-Linux distribution amakhulu, anokusekelwa okuphelele nokuzinzile kwe-UVC protocol. | Izitaki ze-USB ezilula noma ezenziwe ngokwezifiso ze-RTOS nama-kernel e-Linux ancishisiwe, ngokuvamile anokuhambisana okungaphelele kwe-UVC namaphutha angaba khona e-driver. |
Izidingo Zokusebenza Ngesikhathi Sangempela | Ukuhlela okungagcini ngesikhathi sangempela; ukubambezeleka okufushane ngesikhathi kuhlolwa idivayisi kwamukelekile ngokuphelele ngaphandle kokuphazamisa imisebenzi eyinhloko. | Izidingo eziqinile zesikhathi sangempela; ukubambezeleka okuncane kokuphrinta kungaholela ekuphuthelweni kwesikhathi somsebenzi, kuphazamise ukubona kwezimboni, ukuthwebula kwezokwelapha nezinye izinsiza ezibalulekile. |
Ukulinganiswa Kwezingxenyekazi Zekhompyutha | Isilawuli se-USB esilinganisiwe esisebenzayo esihambisana kahle nezinye izinkamela ze-USB ezithengwayo eziningi. | Izixazululo zokulawula ezenziwe ngokwezifiso ezifana ne-DWC2 ne-MUSB zisetshenziswa kabanzi, okuholela ezinkingeni ezinkulu zokuhambisana kwezinkamela ezihlukene. |
Indawo Yokugijima | Indawo ezinzile yangaphakathi engenakuphazamiseka kwe-electromagnetic kanye nokudlidliza kwemishini okuncane. | Izindawo ezinzima zezimboni, ezimoto, kanye nangaphandle, lapho i-ESD, ukudlidliza kwemishini kanye ne-EMI kuphazamisa kakhulu ukudluliswa kwesignali ye-USB nokuzinza kokuxhumana. |
3. Izinselele Ezijwayelekile Ezingokoqobo Zokuxhunywa Okushisayo Kwe-USB Kumadivayisi Ashumekiwe
Kuhlanganiswe nolwazi lwangempela lokuthuthukiswa kobunjiniyela obushumekiwe kanye nokusetshenziswa ensimini, lesi sigaba sifingqa izinselele ezinhlanu ezivame kakhulu nezinenomthelela ekuxhunyweni okushisayo, kanye nemithelela yazo ebonakalayo ekusebenzeni kohlelo.
3.1 Izinkinga Zokuhambisana Nedrayiva Nokwehluleka Ukubalwa
Iningi lama-kernel e-embedded Linux avala ukusekelwa kwe-UVC (I-USB Video Class) ngokuzenzakalelayo ukuze konga izinsiza zesistimu ezinomkhawulo, kuyilapho izinkundla ezinkulu ze-RTOS zingahlanganisi ama-driver endabuko e-UVC. Noma ngabe ukusekelwa kwe-UVC kunikwa amandla ngesandla, izincazelo ezingezona ezijwayelekile zama-camera athile kanye namaphutha angokwemvelo kuma-USB stack enziwe ngokwezifiso kungaholela ngqo ekwehlulekeni kokubalwa, okwenza isistimu ingakwazi ukubona amakhamera ashintshiwe.
Ukwehluleka ukulayisha idrayiva kungenye ingozi efihlekile ebucayi. Ukuhlala kwedrayiva ngemva kokunqanyulwa kwekhamera kubangela ukuvuza kwememori isikhathi eside nokungqubuzana kwezinsiza eziphambene. Ezimweni zokwethembeka okuphezulu njengemishini yezithombe zezokwelapha nokutholwa kwesikhathi sangempela kwezimboni, izinkinga ezinjalo zingadala ukuphahlazeka kohlelo okungazelelwe futhi ziphazamise izinqubo zebhizinisi ezibalulekile.
3.2 Izingqinamba Zezinsiza Nezithiyo Zokusebenza
Amaphrosesa anamandla aphansi ashumekiwe amelwe yi-ARM Cortex-M4 anomkhawulo omkhulu wokubala nememori. Inqubo ephelele yokubala ehlanganisa ukutholwa kwedivayisi, ukuhlaziywa kwedescripta nokulayishwa kwedrayiva idla izinsiza eziningi ze-CPU nememori. Umcimbi owodwa wokushintsha okushisayo ungabangela ukukhuphuka kwe-CPU kwemizuzwana engu-200, okwanele ukwenza imisebenzi yesikhathi sangempela enesikhathi sokuphendula esingamamilisekhondi angu-100 iphuthelwe isikhathi sokuhlela, okuholela ekulahlekeni kwedatha nasekuphazamisekeni kwesevisi.
Ezinhlelweni zokubona ezishumekiwe ezisekelwe ku-Linux, ukusakaza kwamavidiyo okuvamile kuncike ku-CMA (Contiguous Memory Allocator) ukwaba izinkumbulo eziqhubekayo zomzimba. Ukuntuleka kwe-CMA okwanele kungabangela ukuhluleka kokulayisha kwe-uvcvideo driver, ukungqubuzana kwezithombe, noma nokwehluleka okuphelele kokusakaza ngemva kokufaka ikhamera eshisayo.
3.3 Izindlela Ezingathembekile Zokuthola Ukufakwa Okushisayo Nezinhlelo Zokuphatha Izehlakalo
Izilawuli ze-USB ezishumekiwe ezakhelwe ngaphakathi ngokuvamile zibe namaphutha e-hardware noma ama-driver ekucubunguleni iziphazamiso zokushumeka nokukhipha ezishisayo, zivame ukwehluleka ukubona noma zibe nokucubungula okungamanga. Ukwehluleka ukubona ukushumeka kwenza isistimu yehluleke ukubona amakhamera asanda kuxhunywa, kanti izenzakalo zokukhipha ezingabonwa zibangela ukuthi isistimu iqhubeke nokwenza imisebenzi yokusakaza nge-inthanethi kumadivayisi angaxhunyiwe, okuholela ekumoshweni kwezinsiza namaphutha ezinhlelweni.
Izinhlelo eziningi ezingaphezulu ezakhelwe ngaphakathi ezenziwe ngokwezifiso azinayo indlela ejwayelekile yokuphendula izenzakalo zokushumeka nokukhipha. Isistimu ayikwazi ukuqala ngokuzenzakalelayo ukusakaza nge-inthanethi, ukuvuselela isimo sedivayisi noma ukuqala ama-alamu amaphutha ngemva kokushumeka noma kokukhipha ikhamera, okwenza kube nzima kakhulu ukungazinzi kwesistimu ekusebenzeni isikhathi eside.
3.4 Ukuhleleka Kwemephu Yezixhumanisi Zamakhamera Amaningi Nokungqubuzana Kwezinsiza
Amasistimu ashumekiwe okuhlola izimboni ngezindlela eziningi kanye nokuqapha okubanzi ngokuvamile adinga ukuthwala amakhamera amaningi e-USB, okuletha ubunzima obuhlukile bokuphatha ukuxhuma nokukhipha ngesikhathi. Inkinga ephawuleka kakhulu ukungaqini kwezinhlelo zamadivayisi: lapho amakhamera exhunywa ezimbobheni ezahlukene ngendlela ehlukene, isistimu izakwabela kabusha amadivayisi afana no-/dev/video0 no-/dev/video1, okwenza izinhlelo zokusebenza zifunde idatha ngamaphutha eziteshini zamakhamera ezingalungile.
Ngaphezu kwalokho, ukuxhunywa okukanyekanye kwamakhamera amaningi kungadala ukuncintisana okunamandla kwe-bandwidth yebhasi ye-USB nezinsiza zememori yesistimu, okungaholela kalula ekulahlekeni kwezithombe, ukonakala kwedatha kanye nokwehluleka kokubalwa kwezingxenye ezithile zedivayisi.
3.5 Izingozi Zokuphazamiseka Kwemvelo Nokuthembeka Kokuxhumeka Okubonakalayo
Amadivayisi ashumekwayo avame ukusetshenziswa ezindaweni ezinzima zezimboni, ezimotweni, nangaphandle, lapho izici eziyinkimbinkimbi zemvelo ziphazamisa kakhulu ukuzinza kokushintshwa okushisayo kwekhamera ye-USB. Ugesi omile owenziwa ngesikhathi sokushintsha okushisayo udala umonakalo we-ESD kuzilawuli ze-USB, futhi imijikelezo enesivinini esikhulu yezixhumi ze-USB4.0 Type-C izwela kakhulu ekuphukeni kukagesi omile. Ukudlidliza kwemishini emikhulu yezimboni nasezimoto kuyaxegisa izixhumi ze-USB, okubangela izehlakalo eziphindaphindwayo zokushintsha okushisayo nokuphazamisa ukudluliswa kwevidiyo okuqhubekayo. Ngaphezu kwalokho, i-EMI enamandla evela emishinini yezimboni ihlanekezela amasignali ahlukile e-USB, okuholela ekuphazamisekeni kokuhlonza nokonakala kwedatha ngesikhathi sokushintsha okushisayo.
4. Izixazululo Eziqinisekisiwe Zasensimini Zokuthuthukisa Ukuthembeka Kwe-Hot-Plug
Ihlose ezinseleleni zobunjiniyela ezingenhla, lesi sigaba siphakamisa izinhlelo zokuthuthukisa eziqondiwe nezingenzeka ezihlanganisa ukucushwa kwe-kernel, ukuhlela izinsiza, ukucubungula imicimbi, ukuphathwa kwemishini eminingi nokuvikelwa kwehardware, okuqinisekisiwe ngokugcwele kumaphrojekthi we-embedded wezimboni nezimoto.
4.1 Thuthukisa Ukucushwa Kwe-USB Stack Nokuhambisana Komshayeli
Qedela ukujwayela okungaphansi kokudluliswa kwevidiyo ye-USB ukuze kuqedwe ukuhluleka kokubala okubangelwa amaphutha e-stack nomshayeli. Kuzinhlelo ze-embedded Linux, nika amandla into yokucushwa kwe-CONFIG_USB_UVC futhi uhlanganise umshayeli we-uvcvideo ku-kernel noma kufayela lezimpande ukuze uqinisekise ukusekelwa komphumela we-UVC. Buyekeza njalo umshayeli we-uvcvideo ukuze ulungise amaphutha aziwayo okuhambisana namamodeli amasha amakhamera.
Kumaplathifomu ashumekelwe ku-RTOS, sebenzisa izitaki ze-USB ezisekela i-UVC esezivuthiwe njenge-FreeRTOS-Plus-USB, noma qedela ukudluliswa nokulungiswa okuhlosiwe kohlaka lwe-uvcvideo driver. Yenza ukulayisha kwe-driver kube okujwayelekile ekuthuthukisweni kohlelo, qinisekisa ukukhishwa okuphelele kwezinsiza ngemva kokunqanyulwa kwedivayisi, futhi qeda ukuvuza kwememori kwesikhathi eside nokungqubuzana kokuthatha izinsiza.
4.2 Lungisa Ukwabiwa Kwezinsiza Ukuze Kuqedwe Izithiyo Zokusebenza
Misa izinsiza zehadiwe ezizimele zemisebenzi ye-USB hot-plug ukuze ugweme ukuphazamisa izinsiza eziyinhloko zesikhathi sangempela. Gcina imemori eqhubekayo ye-CMA eningi ngamapharamitha omugqa womyalo we-kernel njenge-cma=256M ukuze uqinisekise ukwabiwa kwe-buffer okuzinzile kokubalwa kwekhamera nokusakazwa kwevidiyo. Kumaplathifomu ashumekelwe anama-core amaningi, dlulisa ukuhlaziywa kwephrothokholi ye-USB nemisebenzi yokucubungula i-driver kuma-CPU core azimele ukuze ugweme ukuthatha izinsiza zokusebenza zama-core esikhathi sangempela.
Yamukela inqubomgomo yokuhlela yesikhathi sangempela ye-Linux SCHED_FIFO ukuze ubeke phambili imisebenzi ebalulekile yokubona ngaphezu kwemisebenzi ye-USB enumeration. Vala imisebenzi ye-USB engasetshenziswa njenge-USB 3.0 SuperSpeed engadingekile kanye namamojula okuthola izimbobo angasebenzi ukuze unciphise umthwalo wezinsiza zesistimu futhi ugweme ukuminyana kwe-CPU nememori ngesikhathi sokufaka noma ukukhipha idivayisi.
4.3 Thuthukisa Ukunemba Kokutholwa Kokufakwa Nokususwa Kwedivayisi Namandla Okuphendula Izehlakalo
Lungisa ukucushwa kwe-hardware interrupt ukuze uxazulule izinkinga zokutholwa kokufakwa nokususwa okungekho noma okungamanga. Lungisa kahle izikhonkwane ze-hot-plug interrupt ze-USB controller kanye nezindlela zokuqala (trigger modes) ku-device tree ukuze uqinisekise ukuthi amasignali okuxhuma nokunqanyulwa kwedivayisi atholakala ngokuzinzile ezindaweni eziyinkimbinkimbi.
Yakha izindlela zokusabela ezenzakalelayo ezisekelwe emithethweni ye-Linux udev ukuze kuqaliswe kabusha ukusakaza okuzenzakalelayo, ukubuyekezwa kwesimo sedivayisi kanye nokwaziswa kwephutha ngemva kokuxhunywa kwekhamera eshisayo. Engeza umqondo wokuphinda uzame ukubala ngokuzenzakalelayo ngezimo zesikhashana ezibangelwa ukushintshashintsha kwesignali nokuguquguquka kwe-voltage, okungathuthukisa ngempumelelo izinga lokuphumelela lokuhlonza ukuxhunywa okushisayo.
4.4 Qaphela Ukuthola Ukuhleleka Kwe-Topology Ezinzile Yezinhlelo Zekhamera Eziningi
Faka esikhundleni sokuhlonza idivayisi eguquguqukayo ngokuhlonza izici zehadiwe ezingaguquki ukuze kuxazululwe amaphutha okuhleleka kwezimbobo ezihlukene. Hlonza ikhamera ngayinye ngokuhlanganisa i-VID, i-PID kanye nenombolo yochungechunge lwehadiwe, ukuze isistimu ikwazi ukubopha ngokuzinzile iziteshi ezinengqondo namadivayisi aphathekayo kungakhathaliseki ukuthi kuxhunywe kuziphi izimbobo nokulandelana.
Sebenzisa ama-USB hub anamandla asebenzayo ezinhlelweni zamakhamera amaningi ukuze unikeze amandla azinzile nokwabiwa komkhawulokudonsa ozimele, kunciphisa ukuqhudelana kwezinsiza zebhasi. Yethula izindlela zokuvumelanisa ze-mutex ne-semaphore ukuze uhlele izinqubo zokubhalisa amadivayisi amaningi, ugweme ukungqubuzana kwezicelo zezinsiza ngesikhathi esisodwa okuholela ekwehlulekeni kokubhalisa.
4.5 Qinisa Ukuvikelwa Kwezingxenyekazi Zekhompyutha Ezindaweni Ezinzima Zokusebenza
Misa izinto zokuvikela ezisezingeni eliphezulu kanye nesakhiwo esiklanywe kahle ukuze kumelane nokuphazamiseka kwemvelo. Faka ama-ESD diode ajulile asebenza kahle ezimbotsheni ze-USB ukuze anikeze ukuvikelwa kwe-electrostatic engu-±15kV; sebenzisa izinto ze-ESD ezinamandla aphansi kuma-USB4.0 Type-C interfaces ukuze kulinganise ubuqotho besignali namandla okumelana ne-static.
Sebenzisa ama-USB connector anokhiye wezimboni ukuze ugweme ukunqanyulwa okuphazamisayo okubangelwa ukudlidliza kwemishini. Qondanisa izintambo ze-USB ezivikelwe futhi uhlele kahle izindlela zokudlulisa ukuze izignali zihlale zikude nemishini enegesi ephezulu nemithombo yemisebe ye-electromagnetic, ukuze ucindezela ngempumelelo ukuphazamiseka kwe-EMI futhi uqinisekise ukudluliswa kwesignali okuzinzile ngesikhathi sokuxhuma noma sokukhipha.
5. Isibonelo Sobunjiniyela: Ukuthuthukisa Ukuxhuma Nokukhipha Ohlelweni Lokuhlola Izimboni Ngokubona
5.1 Uhlolojikelele LwePhrojekthi
Uhlelo lokuhlola ikhwalithi yomkhiqizo wefekthri lusebenzisa amakhamera amane e-USB 3.0 e-high-definition ukuze kutholakale ukukhubazeka okugcwele kwemikhiqizo yomugqa wokukhiqiza. Uhlelo lwakhiwe phezu kwesikhulumi se-NXP i.MX8M Plus esishumekwe ku-Linux kernel elungisiwe, okudinga ukusebenza kahle kwesikhathi eside kokushintshwa kwekhamera ezimweni zokudlidliza okukhulu kanye ne-EMI ephezulu.
5.2 Izinkinga Zangaphambi Kokuthuthukiswa
Uhlelo lokuqala lwesistimu lwalunamaphutha amathathu avelele ekusebenzeni kwangempela: ukwehluleka ukuphinda kwenziwe izikhathi eziningi ngesikhathi sokushintshwa kwekhamera eshisayo; izingxabano ezinkulu zomkhawulokudonsa nememori ekusebenzeni kwamasistimu amaningi ekhamera ngasikhathi sinye, okuholela ekulahlekelweni kwezithombe okuqhubekayo nokungazinzi kokuphumayo kwevidiyo; umthelela oqongelelayo we-ESD wabangela ukulimala kancane kancane kwezingxenyekazi ze-USB port, kwenyuka izinga lokwehluleka kwemishini nezindleko zokulungisa.
5.3 Izindlela Zokuqalisa Ukuthuthukiswa
Ithimba lobunjiniyela lenze ukuthuthukiswa okuhlelekile kusukela ekucushweni kwe-kernel, ukuphathwa kwemishini, indlela yezigameko nokuvikelwa kwezingxenyekazi zekhompyutha:
Okwaqala, ithimba lathuthukisa ukucushwa kwe-kernel, lanika ukusekelwa okugcwele kwe-UVC driver, labuyekeza inguqulo esemthethweni ezinzile ye-uvcvideo driver, futhi lakhulisa imemori egciniwe ye-CMA yaba ngu-512MB, lixazulula ngokuphelele inkinga yokwehluleka ukwaba i-buffer kanye nokungazinzi kokubalwa.
Okwesibili, kwasetshenziswa indlela yokuhlela ubudlelwano bamakhamera ngokusekelwe kunombolo ye-serial ukuze kulungiswe ukuhambisana okukodwa-kukodwa phakathi kweziteshi ezinengqondo nezinto ezibonakalayo, kuqedwe amaphutha okuhlonza abangelwa ukushintsha kwamaphoyinti nokushintsha kokulandelana kokuxhuma.
Okwesithathu, izinto zokuvikela i-ESD ze-SEUCS2X24V1B zatshalwa kuzo zonke izimbobo ze-USB ukuze kuthuthukiswe amandla okuvikela i-electrostatic, kunciphisa ukulimala kwezinto ze-USB ngo-90%.
Okokugcina, kwengezwa umqondo wokusabela okuzenzakalelayo osekelwe ku-udev kanye nezindlela zokuphinda zilinge ukubalwa ukuze kutholakale ukululama okuhlakaniphile kwezinkinga zokuxhunywa okushisayo, kunciphisa isikhathi sokuphumula sohlelo ngama-75%.
5.4 Umphumela Wokuthuthukiswa
Ngemva kokuguqulwa okuhlelekile kanye nokuqinisekiswa kwesikhathi eside ensimini, uhlelo lokubona lwezimboni lufinyelele izinga lokuthembeka lokushintsha okushisayo kwekhamera ye-USB elingama-99.9%, lugcina ukuthwebula nokuthola okuqhubekayo nokuzinzile ngaphansi kwezimo zokusebenza ezinzima zezimboni.
6. Izitayela Zokuthuthuka Kwesikhathi Esizayo
6.1 Ukusakazwa Okukhulu Kwezixhumanisi ze-USB4.0 kanye ne-Type-C
Ubuchwepheshe be-USB4.0 buhlinzeka nge-80Gbps ye-bandwidth ephezulu kakhulu kanye namandla okudlulisa ngaphezulu nangaphezulu angu-240W, okuthuthukisa kakhulu ukusebenza kahle kokudluliswa kwamavidiyo ekhamera yezimboni enokucaca okuphezulu ne-frame rate ephezulu. Nokho, ukwakheka kwayo kwesignali ehlukile enesivinini esikhulu kanye nesakhiwo se-Type-C esincane kulethela ukuzwela okuphezulu kwe-ESD kanye nezinselele eziyinkimbinkimbi zokuhlela i-bandwidth. Idizayini yesikhathi esizayo ye-embedded hot-plug izogxila ekuvikelweni kwesignali okucwengekile kanye nokwabiwa kwe-bandwidth okuhlakaniphile okuguquguqukayo ukuze ivumelane nezidingo zokusebenza okuphezulu kwe-USB4.0.
6.2 Ukuthuthukiswa Kokushintsha Okushisayo Okuhlakaniphile Okuqhutshwa yi-AI
Ngokusatshalwa kabanzi kwama-chip e-edge AI, ubuchwepheshe bokuhlakanipha okwenziwa (artificial intelligence) buya kusetshenziswa kancane kancane ekuhleleni izinsiza zesistimu eshumekiwe nasekubikezeleni amaphutha. Isistimu ingahlaziya idatha yokusebenza yangaphambilini efana nezinga lokushisa le-ambient, ukushintshashintsha kwe-voltage, kanye namarekhodi okwehluleka kokufakwa, yakhe amamodeli okubikezela ukuze ibikezele ngaphambi kwesikhathi izinkinga ezingaba khona zokushintshwa okushisayo (hot-plug), futhi ilungise izinqubo zokwaba izinsiza ze-CPU, imemori, kanye ne-bandwidth ngokuguquguqukayo, ukuze ithole ukuvimbela amaphutha ngokuqhubekayo futhi yehlise ukungenelela kwabantu.
6.3 Ukuphathwa Okujwayelekile Kwezinhlelo Zekhamera Zomkhawulo Ezisabalalisiwe
Ukuhlanganiswa kwe-Edge kukhuthaza ukusatshalaliswa okukhulu kwamanethiwekhi ezinzwa zekhamera eziningi ezisabalalisiwe. Amakhamera amaningi afinyelela kuma-edge gateway ngemibhobho ye-USB ukuze kuqoqwe futhi kuhlaziywe idatha ngendlela efanayo. Lesi simo sibeka izidingo eziphakeme zokuphathwa kokufakwa okushisayo okubambisanayo phakathi kwemishini, okuzoqhubekisela imboni ukwakha izivumelwano ezifanayo nezijwayelekile zokusebenzisana kokufakwa okushisayo nokuzilungisa ngokuzenzakalelayo kwezinhlelo ezishumekiwe ezisabalalisiwe.
6.4 Ubuchwepheshe Bokuxhuma Nokukhipha Ngamandla Aphansi Kumadivayisi E-IoT Asetshenziswa Ngamabhethri
Inani elikhulu lamathiminali we-IoT abonakalayo asebenza ngebhethri lifaka phambili izidingo eziphuthumayo zokuklama okunciphisa amandla. Izinga elisha le-USB PD 3.1 lisekela ukulala okuncane kwamandla kwezingxenye ezingaphandle kanye nokuphathwa kwamandla okuguquguqukayo. Umqondo olula we-hot-plug othuthukisiwe unganciphisa ukusetshenziswa kwamandla okungasebenzi ngesikhathi sokubalwa kwedivayisi nokuma okungenzi lutho, okwandisa ngempumelelo impilo yokusebenza eqhubekayo yamathiminali we-IoT futhi kuvumelane nezimo zokusebenza ezingagadiwe isikhathi eside.
7. Isiphetho
Ukwakhiwo lwe-USB camera hot-plug ezinhlelweni ezishumekiwe (embedded systems) kunzima kakhulu kunalokho okwenzeka ezimweni zedesktop, kuthintwa izinsiza zehadiwe ezilinganiselwe, ukuhlela kwesikhathi sangempela okuqinile, izakhiwo ezenziwe ngokwezifiso kanye nezindawo zokusebenza ezinzima. Kuphela ngokusebenzisa ukuthuthukiswa kwezici eziningi okuhlanganisa ukulungiswa kwe-USB stack, ukuphathwa kwezinsiza okuguquguqukayo, ukusabela okuqinile ezenzakalweni, ukuhleleka kwemidwebo yamadivayisi amaningi kanye nokuvikelwa kwehadiwe yemvelo lapho abathuthukisi bengaxazulula ngokuyisisekelo izinkinga zokungazinzi kwe-hot-plug futhi bakhe amasistimu abonakalayo ashumekiwe athembekile kakhulu.
Ngokuqhubekayo kokuphindaphindwa kweprothokholi ye-USB kanye nokuhlanganiswa okujulile kobuchwepheshe be-edge AI, ukwakheka kwe-embedded USB camera hot-plug kuyaqhubeka nokuthuthuka kuye ekuthembekeni okuphezulu, ubuhlakani kanye nokusetshenziswa kwamandla okuphansi. Ukunamathela emicabangweni yokuthuthukisa ecwengisisiwe futhi ehambisana nesimo kungasiza imishini yezimboni, ezokwelapha kanye ne-IoT ebonakalayo ukuthi igcine ukusebenza okuzinzile nokusebenziseka kwesikhathi eside ezindaweni eziyinkimbinkimbi.
Uxhumane
Sicela uxhumane nathi uhambele
WhatsApp
WeChat