This has happened on three devices in a row: I connect a PCB with an ATmega16u4 to FLIP, with success. I load in my firmware -- verified. I click 'Start Application', and my board starts humming away. What a great thing!
But. Now none of them can connect via FLIP (no USB device; nothing in Device Manager either), and ISP can't get the signature or connect either. It gives this error:
I can't get into bootloader mode, either. Maybe I'm missing something there. I thought I could program on the fly like Arduino, but it seems I need to set some that up on the firmware side. I can't get there with hardware, either. I've got HWB pulled down via 10k, and Reset pulled up via 20k. I shorted Reset to ground for a moment, just to try to enter bootloader. Alas, nothing.
My goal is to be able to update firmware in the field via USB, but now I can't update them at all!