7 Replies Latest reply on Sep 17, 2018 12:38 AM by yumic_3247926

    CYApi  AltIntfcCount()

      I don't unstand the API method of AltIntfcCount();

      The explain is:

      This function returns the number of alternate interfaces exposed by the device.


      The primary interface (AltSetting == 0) is not counted as an alternate interface.


      IN the descriptor it has a interface





      but in the bulkloop application ,why it  +1;,the result is 1

      int interfaces = this->m_selectedUSBDevice->AltIntfcCount()+1;