{"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\/it\/blog\/news\/proekt-elk-razvivaet-kompaktnyj-javascript-dvizhok-dlya-mikrokontrollerov","title":{"rendered":"Il progetto elk sviluppa un motore JavaScript compatto per microcontrollori","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u00c8 disponibile una nuova versione del motore JavaScript elk 2.0.9, progettato per l'uso in sistemi con risorse limitate, come i microcontrollori, incluse le schede ESP32 e Arduino Nano con 2 KB di RAM e 30 KB di Flash. Per far funzionare la macchina virtuale fornita sono necessari solo 100 byte di memoria e 20 KB di spazio di archiviazione. Il codice del progetto \u00e8 scritto in C e distribuito sotto la licenza GPLv2. Per compilare il progetto \u00e8 sufficiente un compilatore C \u2014 non sono utilizzate dipendenze aggiuntive. Il progetto \u00e8 sviluppato dagli sviluppatori del sistema operativo per dispositivi IoT Mongoose OS, del motore JavaScript mJS e del software integrato web server<\/a> Mongoose (utilizzato in prodotti di aziende come Siemens, Schneider Electric, Broadcom, Bosch, Google, Samsung e Qualcomm). <\/p>\n

L'obiettivo principale di Elk \u00e8 la creazione di firmware per microcontrollori in linguaggio JavaScript, eseguendo vari compiti di automazione. Il motore \u00e8 anche adatto per l'inserimento di gestori in JavaScript in applicazioni C\/C++. Per utilizzare il motore nel proprio codice, basta inserire il file elk.c nell'albero dei sorgenti, includere il file di intestazione elk.h e utilizzare la chiamata js_eval. \u00c8 consentito richiamare funzioni definite nel codice C\/C++ dai script JavaScript, e viceversa. Il codice JavaScript viene eseguito in un ambiente protetto e isolato dal codice principale, utilizzando un interprete che non genera bytecode e non utilizza assegnazione dinamica della memoria. <\/p>\n

In Elk \u00e8 implementato un piccolo, ma sufficiente per creare script funzionanti, sottoinsieme della specifica Ecmascript 6. In particolare, \u00e8 supportato un set di operatori e tipi di base, ma non \u00e8 prevista la gestione di array, prototipi, espressioni this, new e delete. Si consiglia di utilizzare let al posto di var e const, e while al posto di do, switch e for. Non \u00e8 fornita alcuna libreria standard, quindi non ci sono oggetti come Date, Regexp, Function, String e Number.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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