Charles, Thanks for sharing your notes of the USB user's guide. That's the main document I've used since I started this project. I've read it many times to see if I've been missing something. I started this thread by sharing the main files of my modified project: The file with all the functions including main(), usbhmisc.h and usbhmisc.c. Take a closer look to those files and you will find the answer to the questions you pose above.
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