{"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\/nl\/blog\/news\/proekt-elk-razvivaet-kompaktnyj-javascript-dvizhok-dlya-mikrokontrollerov","title":{"rendered":"Het elk-project ontwikkelt een compacte JavaScript-engine voor microcontrollers","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Er is een nieuwe release van de JavaScript-engine elk 2.0.9 beschikbaar, gericht op gebruik in systemen met beperkte middelen, zoals microcontrollers, inclusief ESP32-borden en Arduino Nano met 2 KB RAM en 30 KB Flash. Voor de werking van de aangeboden virtuele machine zijn slechts 100 bytes geheugen en 20 KB opslagruimte nodig. De code van het project is geschreven in C en wordt verspreid onder de GPLv2-licentie. Voor de bouw van het project is voldoende met een C-compiler \u2014 er zijn geen extra afhankelijkheden nodig. Het project wordt ontwikkeld door de ontwikkelaars van het besturingssysteem voor IoT-apparaten Mongoose OS, de JavaScript-engine mJS en embedded. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/nl\/server\/\"   title=\"webserver\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"760\">webserver<\/a> Mongoose (toegepast in producten van bedrijven zoals Siemens, Schneider Electric, Broadcom, Bosch, Google, Samsung en Qualcomm).    <\/p>\n<p>Het belangrijkste doel van elk is het maken van firmware voor microcontrollers in JavaScript, die verschillende automatiseringstaken uitvoeren. De engine is ook geschikt voor het inbedden van JavaScript-handlers in C\/C++-applicaties. Om de engine in uw code te gebruiken, hoeft u alleen het bestand elk.c in de bronbestanden te plaatsen, de header elk.h toe te voegen en de functie js_eval aan te roepen. Het is mogelijk om functies die in C\/C++-code zijn gedefinieerd vanuit JavaScript-scripts aan te roepen en omgekeerd. De JavaScript-code wordt uitgevoerd in een beveiligde en van de hoofdcode ge\u00efsoleerde omgeving met behulp van een interpreter die geen bytecode genereert en geen dynamische geheugenallocatie gebruikt.      <\/p>\n<p>In Elk is een kleine, maar voldoende subset van de Ecmascript 6-specificatie ge\u00efmplementeerd voor het maken van werkscenario's. In het bijzonder wordt een basisset van operators en types ondersteund, maar er is geen ondersteuning voor arrays, prototypes, this-expressies, new en delete. In plaats van var en const wordt aangeraden let te gebruiken, en in plaats van do, switch en for \u2014 while. Er is geen standaardbibliotheek beschikbaar, dat wil zeggen dat er geen objecten zoals Date, Regexp, Function, String en Number zijn.<br \/>\n<br \/>Bron: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=55868\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u043e\u0439 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439 \u043c\u0430\u0448\u0438\u043d\u044b \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e 100 \u0431\u0430\u0439\u0442 \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 20 \u041a\u0411 \u043c\u0435\u0441\u0442\u0430 \u043d\u0430 \u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u0435. \u041a\u043e\u0434 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421\u0438 \u0438 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 [&hellip;]<\/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<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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 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