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TIVA C USB Bootloader with TivaWare boot_usb

snellr
Intellectual 715 points

Using CCSv6, TivaWare 2.0.1.11577, Win8.1, Tiva C Launchpad (TM4C123G),

My goal is to create (modify) a bootloader such that the Launchpad will, upon a stimulus, enumerate as a USB device and allow a PC to copy a new firmware image file to it via USB.

I am able to write the TivaWare bootloader/../boot_usb.bin to flash at 0x0 (built with #define USB_ENABLE_UPDATE added in bl_config.h).  I'm expecting that to be enough to cause the Launchpad to enumerate as a USB device and wait for a firmware file to be copied through Windows File Explorer.  However, this isn't the case and I'm wondering why.  Is it a driver issue?  I don't see anything additional, even ambiguous, showing up in Device Manager, though.

The boot_usb.bin file that I am using is attached to this question (with a suffix of .txt to allow it to upload).