hello, A simple question related to linux usb concept here: I am reading the USB Spec2.0 , Mass Storage Spec. as well as linux usb code. I am little confused by some concept concerning URB,USB requests and CBW/CSW.
In my understanding, each time host want to send request or data to usb device, it has to use usb_submit_urb(), The USB request has standard device request and Class-specific request, for standard request, it is used to get general USB device info. but when it is going to use class-specific request? what is the relationship between CBW/CSW and Class-specific request? so a URB contains either USB standard request or class-specific request or CBW? how about actual data(for example when writing a file to USB stick)? Thanks, Houxiang Zhu ------------------------------------------------------- This SF.Net email is sponsored by: Sybase ASE Linux Express Edition - download now for FREE LinuxWorld Reader's Choice Award Winner for best database on Linux. http://ads.osdn.com/?ad_idU88&alloc_id065&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
