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This article mainly introduces "how to develop native modules for iotjs". In daily operation, I believe many people have doubts about how to develop native modules for iotjs. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "how to develop native modules for iotjs"! Next, please follow the editor to study!

Develop native modules for iotjs

Iotjs is Samsung's open source javascript Internet of things development platform. It provides javascript applications with the ability to access hardware, network, file system and asynchronization. The function is similar to nodejs, but iotjs is much smaller in terms of code volume and memory requirements, so it is the first choice to develop iot device applications with javascript.

AWTK, full name Toolkit AnyWhere, is an open source GUI engine developed by ZLG, designed for embedded systems, WEB, various Mini Program, mobile phones and PC to create a general GUI engine, providing users with a powerful, efficient and reliable, easy-to-use GUI engine that can easily make cool effects.

1. Modify the name of the module

There is no problem if the name of the module uses mymodule, but mymodule is a meaningless name that does not express the real functionality of the actual module. I need to rename the module to awtk here, which can be done in the following ways:

Directory name using awtk-module

Mkdir awtk-module

Rename the source file of the C code to awtk_module.c and the initialization function to InitAwtkNativeModule.

Create awtk-module/modules.json

{"modules": {"awtk": {"native_files": ["awtk_module.c"], "init": "InitAwtkNativeModule", "external_libs": ["awtk-jerryscript", "jerryscript", "awtk", "assets", "glad", "gpinyin", "linebreak", "nanovg"] "platforms": {"linux": {"external_libs": ["SDL2", "gtk-3", "gdk-3", "sndio", "Xext", "X11", "stdc++", "dl", "m"]}

Modify compilation script parameters

Tools/build.py-external-modules=awtk-module-cmake-param=-DENABLE_MODULE_AWTK=ON

ENABLE_MODULE_ must write the name of the actual module, if you forget to change the MYMODULE to the name of the actual module, the error so that you have no idea what is going on.

II. Compilation parameters

Your own modules inevitably use external libraries, but you can specify the name of the library in modules.json, but not the path to the library or the header file. The attempt was unsuccessful, and then I had to write a cmake file myself, which was referenced in iotjs's CMakeLists.txt.

The awtk.cmake is as follows:

GET_FILENAME_COMPONENT (PROJ_ROOT "${CMAKE_CURRENT_LIST_DIR} /.. /" ABSOLUTE) SET (AWTK_ROOT ${PROJ_ROOT} / awtk) SET (AWTK_JS_ROOT ${PROJ_ROOT} / awtk-js) SET (APP_ASSETS_ROOT ${AWTK_ROOT} / demos) SET (AWTK_JS_FILE ${AWTK_JS_ROOT} / src/awtk.js) MESSAGE ("AWTK_ROOT=$ {AWTK_ROOT}") MESSAGE ("AWTK_JS_") ROOT=$ {AWTK_JS_ROOT} ") MESSAGE (" AWTK_JS_ROOT=$ {CMAKE_CURRENT_LIST_DIR} ") SET (CMAKE_VERBOSE_MAKEFILE ON) ADD_COMPILE_OPTIONS ("-DAWTK_JS_FILE=\ "${AWTK_JS_FILE}\") ADD_COMPILE_OPTIONS ("-DAPP_ASSETS_ROOT=\ "${APP_ASSETS_ROOT}\") LINK_DIRECTORIES ("${AWTK_ROOT} / lib" ${AWTK_JS_ROOT} / lib ") INCLUDE_DIRECTORIES ("${AWTK_ROOT} / src/"${AWTK_ROOT} / src/ext_widgets/"${AWTK_JS_ROOT} / src/jerryscript")

Using the following line of code to turn on verbose mode, you can see a lot of debugging information, which can help you quickly locate the problem:

SET (CMAKE_VERBOSE_MAKEFILE ON)

Then quote in CMakeLists.txt:

Include (.. / awtk-iotjs/awtk-module/awtk.cmake) include (cmake/iotjs.cmake)

It must be referenced before iotjs.cmake, otherwise it will be invalid.

Third, put it in a separate directory

It is easier to manage modules in separate directories. Awtk-iotjs is a module written for iotjs that relies on awtk and awtk-js to put several modules in the same directory.

Awtk

Awtk-js

Iotjs

Awtk-iotjs

The compilation script is changed to:

${iotjs_ROOT} / tools/build.py-- external-modules=$ {CWD} / awtk-module-- cmake-param=-DENABLE_MODULE_AWTK=ON

Run the script to:

If ["$1" = ""]; then JS_FILE= "demos/button.js" else JS_FILE= "$1" fi$ {iotjs_ROOT} / build/x86_64-linux/debug/bin/iotjs "$JS_FILE" this is the end of the study on "how to develop native modules for iotjs", hoping to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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