Cypress's example Enumeration | Cypress Semiconductor
Cypress's example Enumeration
Good evening, I am a student and just start learning about USB. I am very confuse in enumeration process of USB.
I used cypress FX3S and load the USBBulkLoopAuto example firmware into the DVK board. Then i plug to the PC with USB 3.0 port. I am using USBlyzer to analyse the USB.
Attachments is the screenshots from the USBlyzer and also the exported html list.
The things make me confused is that the descriptor is send again and again (about 3 times) in the enumeration process.
Is it the descriptor will send more detailed after assigned a driver and selected the configuration?
Please follow the screenshots 1 by 1, i had included some text and questions there.
Please help me to understand the actual process of enumeration. Thanks in advance.