Re: Bulk USB transfers works with USB3.0 ports and not with USB2.0
Xiaofan Chen <[email protected]>
| Newsgroups | gmane.comp.lib.libusb.devel.windows |
|---|---|
| Message-ID | <CAGjSPUAWPWS1iwnzavtDpuw4ZSMKxtMz+HJuMcTg3cJ-r9po_Q@mail.gmail.com> |
On Tue, Sep 30, 2014 at 4:02 PM, Aymen JEBALI <[email protected]> wrote: > Thanks for your help Xiofan, > > The problem is due to the fact that the isolator supports only Full speed > USB transactions. > But the SAM3U is high speed. The SAM3U can switch to full speed. > > Now the problem I think is with the SAM3U firmware and USB descriptor > configuration. > > The problem was with the Full speed configuration of the USB descriptor. > I was using 512 as a maximum bulk transfer size. > Problem disappear when setting this value to 64. > Glad that you resolved the issue and thanks for reporting back. -- Xiaofan ------------------------------------------------------------------------------ Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk