I am creating an app to update the firmware on my usb device and need a way to check the progress on the update from the device’s side. I am trying to figure out what exactly the output is so I can code everything correctly.

I have tried using the controlTransfer method, but that just outputs the device descriptors. The format of the output should either be a 1 for fail or 0 for pass. Is there a better method/function to use with this kind of request besides controlTransfer? It seems like that function is mainly to send data to a device instead of recieving data.