過(guò)程數(shù)據(jù)對(duì)象PDO(Process data object) PDO屬于過(guò)程數(shù)據(jù)用來(lái)傳輸實(shí)時(shí)數(shù)據(jù),即單向傳輸,無(wú)需接收節(jié)點(diǎn)回應(yīng)CAN報(bào)文來(lái)確認(rèn),從通訊術(shù)語(yǔ)上來(lái)說(shuō)是屬于&ldquo
CANopen是一種架構(gòu)在控制局域網(wǎng)路(Controller Area Network, CAN)上的高層通訊協(xié)議,對(duì)其協(xié)議的學(xué)習(xí)很多人都覺(jué)得有難度,看來(lái)看去都覺(jué)得是云里來(lái)霧里去的,本文將讓CA
$sql1?=?'SELECT?count(*)?FROM?u_goods?WHERE?title?LIKE?:title'; $query->bindValue(':title','%'.$s