{"id":101400,"date":"2021-09-25T10:22:59","date_gmt":"2021-09-25T08:22:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/proekt-elk-razvivaet-kompaktnyj-javascript-dvizhok-dlya-mikrokontrollerov"},"modified":"2021-09-25T10:22:59","modified_gmt":"2021-09-25T08:22:59","slug":"proekt-elk-razvivaet-kompaktnyj-javascript-dvizhok-dlya-mikrokontrollerov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/proekt-elk-razvivaet-kompaktnyj-javascript-dvizhok-dlya-mikrokontrollerov","title":{"rendered":"Projekt elk rozwija kompaktowy silnik JavaScript do mikrokontroler\u00f3w.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dost\u0119pna jest nowa wersja silnika JavaScript elk 2.0.9, zaprojektowana do u\u017cycia w systemach z ograniczonymi zasobami, takich jak mikrokontrolery, w tym p\u0142ytki ESP32 i Arduino Nano z 2 KB RAM i 30 KB Flash. Do dzia\u0142ania dostarczanej wirtualnej maszyny wystarczy 100 bajt\u00f3w pami\u0119ci i 20 KB miejsca na dysku. Kod projektu napisano w j\u0119zyku C i jest dystrybuowany na licencji GPLv2. Aby skompilowa\u0107 projekt, wystarczy kompilator C \u2014 dodatkowe zale\u017cno\u015bci nie s\u0105 wymagane. Projekt jest rozwijany przez tw\u00f3rc\u00f3w systemu operacyjnego dla urz\u0105dze\u0144 IoT Mongoose OS, silnika JavaScript mJS oraz wbudowanego. serwera www<\/a> Mongoose (u\u017cywany w produktach takich firm jak Siemens, Schneider Electric, Broadcom, Bosch, Google, Samsung i Qualcomm). <\/p>\n

G\u0142\u00f3wnym celem elk jest tworzenie firmware'u dla mikrokontroler\u00f3w w j\u0119zyku JavaScript, wykonuj\u0105cych r\u00f3\u017cne zadania automatyzacji. Silnik nadaje si\u0119 r\u00f3wnie\u017c do wbudowywania procesor\u00f3w JavaScript w aplikacje napisane w C\/C++. Aby korzysta\u0107 z silnika w swoim kodzie, wystarczy umie\u015bci\u0107 w drzewie \u017ar\u00f3de\u0142 plik elk.c, do\u0142\u0105czy\u0107 nag\u0142\u00f3wek elk.h i u\u017cywa\u0107 wywo\u0142ania js_eval. Mo\u017cliwe jest wywo\u0142ywanie w skryptach JavaScript funkcji zdefiniowanych w kodzie C\/C++, i odwrotnie. Kod JavaScript wykonuje si\u0119 w chronionym i izolowanym od g\u0142\u00f3wnego kodu \u015brodowisku za pomoc\u0105 interpretera, kt\u00f3ry nie generuje kodu bajtowego i nie u\u017cywa dynamicznego przydzielania pami\u0119ci. <\/p>\n

W Elk zaimplementowano ma\u0142e, ale wystarczaj\u0105ce dla tworzenia dzia\u0142aj\u0105cych skrypt\u00f3w, podzbi\u00f3r specyfikacji Ecmascript 6. W szczeg\u00f3lno\u015bci wspierany jest podstawowy zestaw operator\u00f3w i typ\u00f3w, ale brakuje wsparcia dla tablic, prototyp\u00f3w, wyra\u017cenia this, new i delete. Zamiast var i const zaleca si\u0119 u\u017cywanie let, a zamiast do, switch i for \u2014 while. Nie udost\u0119pniana jest standardowa biblioteka, tj. brak takich obiekt\u00f3w jak Date, Regexp, Function, String i Number.
\n
\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u043e\u0432\u044b\u0439 \u0432\u044b\u043f\u0443\u0441\u043a JavaScript-\u0434\u0432\u0438\u0436\u043a\u0430 elk 2.0.9, \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u043d\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0441 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u043c\u0438 \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c\u0438, \u0442\u0430\u043a\u0438\u043c\u0438 \u043a\u0430\u043a \u043c\u0438\u043a\u0440\u043e\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u044b, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u043f\u043b\u0430\u0442\u044b ESP32 \u0438 Arduino Nano \u0441 2 \u041a\u0411 \u041e\u0417\u0423 \u0438 30\u041a\u0411 Flash. \u0414\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b 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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-101400","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Projekt elk rozwija kompaktowy silnik JavaScript dla mikrokontroler\u00f3w | ProHoster","description":"Najnowsza wersja silnika JavaScript elk 2.0.9 jest dost\u0119pna, skierowana do system\u00f3w o ograniczonych zasobach, takich jak mikrokontrolery, w tym p\u0142ytki ESP32 i Arduino Nano z 2 KB RAM i 30 KB 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