An gabatar da Rasberi Pi 4

Bayan shekaru uku da rabi halitta Rasberi Pi 3 Rasberi Pi Foundation gabatar sababbin al'ummomi Rasberi PI 4. Model "B" ya riga ya kasance don oda, sanye take sabon SoC BCM2711, wanda shi ne sigar sake fasalin gaba daya na guntun BCM283X da aka yi amfani da shi a baya, wanda aka samar ta amfani da fasahar tsari na 28nm. Farashin hukumar bai canza ba kuma har yanzu dalar Amurka 35 ne.

Har ila yau SoC ya ƙunshi nau'ikan nau'ikan 64-bit ARMv8 guda huɗu kuma yana gudana a ɗan ƙaramin ƙara kaɗan (1.5GHz maimakon 1.4GHz). A lokaci guda, canji a cikin tsarin fasaha ya sa ya yiwu a maye gurbin Cortex-A53 tare da babban aikin Cortex-A72, wanda ya dauki aikin zuwa wani sabon matakin. Bugu da ƙari, an yi sauyi zuwa amfani da ƙwaƙwalwar LPDDR4, wanda, idan aka kwatanta da ƙwaƙwalwar ajiyar LPDDR2 da aka yi amfani da ita a baya, yana ba da haɓaka sau uku a cikin bandwidth. Sakamakon haka, a cikin gwaje-gwajen aiki sabuwar hukumar ta zarce ƙirar Rasberi Pi 3B+ da ta gabata sau 2-4.

Sauran bambance-bambance masu mahimmanci sun haɗa da haɗawa da mai sarrafa PCI Express, tashoshin USB 3.0 guda biyu (da biyu na USB 2.0 tashar jiragen ruwa) da biyu Micro HDMI tashar jiragen ruwa (a baya an yi amfani da cikakken girman HDMI daya), yana ba ku damar nuna hotuna akan masu saka idanu biyu tare da ingancin 4K. . VideoCore VI graphics accelerator an sabunta shi sosai, wanda ke goyan bayan OpenGL ES 3.0 kuma yana iya ƙaddamar da bidiyo na H.265 tare da ingancin 4Kp60 (ko 4Kp30 akan masu saka idanu biyu). Ana iya ba da wutar lantarki ta USB-C (a baya USB micro-B), ta GPIO ko ta zaɓin zaɓi. koyaushe PoE HAT (Power over Ethernet).

Bugu da ƙari, an warware matsalar da aka daɗe da rashin isasshen RAM - yanzu ana ba da hukumar a cikin nau'ikan 1, 2 da 4 GB na RAM (cikawar $ 35, $ ​​45 da $ 55, bi da bi), wanda ya sa sabon kwamitin ya zama mafita mai dacewa don. ƙirƙirar wuraren aiki, dandamali na caca, da sabobin , ƙofofin gidaje masu wayo, rukunin sarrafa robot da tsarin multimedia na zamani.

An inganta mai sarrafa Gigabit Ethernet, wanda yanzu an haɗa shi da SoC ta hanyar bas ɗin RGMII daban, wanda ke ba shi damar cimma cikakken aikin da aka ayyana. USB yanzu ana aiwatar da shi ta hanyar keɓantaccen mai sarrafa VLI wanda aka haɗa ta hanyar PCI Express kuma yana samar da jimillar kayan aiki na 4Gbps. Kamar yadda yake a baya, kwamitin yana sanye da tashoshin GPIO guda 40, DSI (haɗin allo), CSI (haɗin kyamara) da guntu mara igiyar waya wanda ke goyan bayan daidaitattun 802.11ac, aiki a mitoci 2.4GHz da 5GHz da Bluetooth 5.0.

A lokaci guda, an buga sabon sakin rarraba Rasparin, wanda ke ba da cikakken goyon baya ga Raspberry Pi 4. Sakin kuma sananne ne don canzawa zuwa Debian 10 "Buster" tushen kunshin (da Debian 9), wani gagarumin sake fasalin mai amfani da mai amfani da kuma hada da sabon Mesa V3D direba tare da ingantaccen goyon bayan 3D (ciki har da samuwa ta amfani da OpenGL don hanzarta mai binciken). An shirya majalisai guda biyu don zazzagewa - gajeriyar guda (406 MB) don tsarin uwar garken kuma cikakke (1.1 GB), wanda aka kawo tare da yanayin mai amfani Pixel (cokali mai yatsa daga LXDE). Don shigarwa daga wuraren ajiya Akwai kusan fakiti dubu 35 akwai.

source: budenet.ru