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geekhack Projects => Making Stuff Together! => Topic started by: bonequatheman on Tue, 02 May 2023, 17:44:24

Title: PCB with atmega32u4 au "Unknown USB (Device Descriptor Request Failed)"
Post by: bonequatheman on Tue, 02 May 2023, 17:44:24

I've been trying to make my own keyboard using the 32u4 but I've run into the error above. Would it be as simple as me messing up the solder on the USB port? I know the solder joints on the 32u4 and other components around it are good and the D+/- are the same length with 2 vias each. I tried using an esp32 I had lying around with https://github.com/lbernstone/ESP_AVRISP and avrdude to try and flash my hex to the 32u4 thinking since its brand new from Digikey it might not have a bootloader but it never got past "avrdude: send: 0 [30]   [20]". I've been using chatgpt to help but its just not cutting it rn. Attached are screenshots from my kicad files I removed my ground plane to see easier. could someone please help? I'm hoping to not have to reorder the PCB but I just want it to work so I will if that's what I messed up.