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  1. Understanding The USB Specification

    Howdy folks,
    I'm trying to understand how USB works as a whole [for implementing Devices]. Currently, I'm trying to dive through the teensy4 usb.c code, but I'm having trouble interpreting it.

    In...
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    For posterity, I ended up buying this[1]...

    For posterity, I ended up buying this[1] TTL<->USB Serial adapter from sparkfun. Uncommented "#define PRINT_DEBUG_STUFF" in debug/printf.h, connected the cable to hardware serial4, and set the serial...
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    Thanks folks, this is an excellent starting...

    Thanks folks, this is an excellent starting point!

    I'll investigate that post, logic analyzers, and setting up on that serial4 tx pin.

    For hardware serial on the teensy 4, do I need a MAX232...
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    Teensy 4 low-level debugging

    Howdy folks,
    tl;dr: What is the best approach to be able to view the debug/printf[1] statements when working with the Teensy 4.0?

    I've been investigating adding a new usb interface to the teensy...
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