On Fri, Aug 13, 2010 at 7:50 AM, Greg KH <greg@xxxxxxxxx> wrote: > On Thu, Aug 12, 2010 at 07:46:57PM +0800, Yuping Luo wrote: > Control endpoints are smaller usually, so that would make it a bit > slower, right? yes, for our usb 2.0 controller, the packet size is 64 byte, however, each data exchange between memory and device controller is bigger than 4KB. >> and also doubt for USB DFU specification, it's not popular as the >> usb. Greg, since you are one of contributors for it, what do you say? > > I don't understand the question. Yes, I helped with the DFU spec oh so > many years ago, but I primarily wrote the sample code that is in the end > of the spec (with a nice bug that someone reminds me about once a year > it seems.) got it, I have found your name in the spec. dfu only use the control EP,and I am wondering why bulk EP not used for data transfer. > What is the real issue you are having here? > confused, > the usb core only allow 4KB ( 1 page for ARM arch) for each transfer, and I have to change it to use 16KB for higher burning speed. many thanks. Yuping -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
