用C8051F040实现DA（模拟-数字）变换。C8051F040集成了12位精度的DA转换器。-With the C8051F040 to achieve DA (analog- digital) conversion. C8051F040 integrates a 12-bit accuracy of the DA converter.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001320s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.090245s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001253s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001222s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001080s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001395s ]
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