In order to make application development get rid of bottom hardware restriction , and to invoke hardware device through a general interface , device interface is defined in sca system 為了使應(yīng)用的開發(fā)擺脫底層硬件的制約,使應(yīng)用能通過一個統(tǒng)一的接口調(diào)用硬件設(shè)備,在sca系統(tǒng)里定義了設(shè)備接口。