Hi: I have some questions about periodic scheduling. Now I'm planning to write a hcd for the host controller in our embedded system using Linux 2.6,and this host controller supports USB2.0,but is non-PCI as well as not EHCI compliant. Considering these features of it, I take SL811-hcd as reference.In SL811-hcd, I found some code about periodic scheduling,however, our host contorller have a Host Transaction Scheduler,which analyzes how many endpoints wait for service and decides which endpoint will be serviced in the current (mico)frame and which will be serviced in the next. So I want to know whether I need to implement periodic scheduling in the driver,even though the hardware has the capability of transaction scheduling.If I need ,which scheduling mechanism should I choose ,EHCI,OHCI or others? Your prompt reply will be appreciated. Best regards. Jim
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