RT-Thread实时操作系统内核、驱动和应用开发技术-畅读网

　　　　

RT-Thread实时操作系统内核、驱动和应用开发技术

作者：郑苗秀

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mobi/epub/pdf/awz3

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内容简介:

RT-Thread是一个开源的嵌入式实时操作系统，专门设计用于嵌入式系统和物联网设备，是我国自主研发的一个嵌入式实时多线程操作系统。本书主要介绍RT-Thread开发技术，由浅入深地介绍了RT-Thread的基础知识、开发环境与工具、内核开发技术、设备驱动开发技术、文件系统开发技术、GUI开发技术和网络开发技术。本书边介绍理论知识边介绍开发技术，将理论学习和开发实践紧密结合起来，并给出了相关案例的完整代码，读者可以在代码的基础快速地进行二次开发。

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SELECT `id`,`name`,`pid`,`image`,`level`,`is_show`,`is_recommend` FROM `ls_goods_category` WHERE `is_show` = 1 AND `del` = 0 AND `level` = 2 ORDER BY `id` ASC,`sort` DESC [ RunTime:0.004173s ]
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SHOW FULL COLUMNS FROM `ls_nav` [ RunTime:0.006377s ]
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SHOW FULL COLUMNS FROM `ls_friendly_link` [ RunTime:0.005752s ]
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SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 3 LIMIT 1 [ RunTime:0.004433s ]
SELECT `id`,`name` FROM `ls_goods_category` WHERE `id` = 35 LIMIT 1 [ RunTime:0.008188s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 11 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.004343s ]
SELECT `a`.*,`ap`.`width`,`ap`.`height` FROM `ls_ad` `a` INNER JOIN `ls_ad_position` `ap` ON `a`.`pid`=`ap`.`id` WHERE `pid` = 14 AND `ap`.`client` = '2' AND `a`.`status` = '1' AND `a`.`del` = '0' AND `ap`.`status` = '1' AND `ap`.`del` = '0' ORDER BY `sort` DESC,`id` DESC [ RunTime:0.004121s ]
SELECT * FROM `ls_goods` WHERE `del` = 0 AND `status` = 1 AND `create_time` <= 1750268044 ORDER BY `create_time` DESC LIMIT 5 [ RunTime:0.858445s ]

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