1 Reply Latest reply on Feb 17, 2016 6:00 AM by madhul_36

    Manage multiple alternate settings


      Hi all,


      I modified the USB descriptors of my project in order to have 2 Alternate setting into the Standard High Speed Configuration Descriptor. The 2 Alternate Setting Index are 0 and 1 (obviously).


      If I try to open the device (in USB2.0 mode, since the Alternate Setting is not present in USB3.0 descriptor) with Alternate Setting Index 0 all is fine, if I try Alternate Setting Index 1 the device stalls the request. I'm reasonably sure that the descriptor is correct.


      I don't know if I miss something in the code, since I based my code on an application note that have only one Alternate Setting.


      Can someone point me to a sample code where multiple alternate settings are managed? I see that all FX3 examples into SDK use only one Alternate Setting...




      Thanks a lot!

        • 1. Re: Manage multiple alternate settings



          The following example projects in FX3 SDK use multiple alternate settings.


          Please refer:


          basic_examples / cyfxisosrcsink


          basic_examples / cyfxisosrc


          basic_examples / cyfxisolpmaninout


          basic_examples / cyfxisolpauto


          uac_examples / cyfxuac


          uvc_examples / cyfxuvcinmem




          - Madhu Sudhan