Issue with USB enumeration on pico-sdk v1.3

[nieldk]

Thanks for this.
I had some issues getting it to work with the current pico-sdk (v1.3).

The CDC device /dev/ttyACM0 was never enumerated and dmesg kept spitting errors like usb 1-1.2: can't set config #1, error -110

But, checking out pico-sdk v1.2.0 fixed my issue. and it enumerates and presents ttyACM0 as expected.

Didnt investigate further, but its likely changes in tinyUSB pulled into pico-sdk

[BarryHuffman]

I've experienced the same on Fedora 34, and Leap 15.3

[nikp123]

Anyway for anyone wanting to use this but not wanting to deal with the pain of actually making this work, here's the precompiled uf2 THAT WORKS.

pico-serprog.zip

I've already applied the #3 patch, so the pin definitions would be correct as shown in the README.

Enjoy.

PS: if you still want to build this you'll need to checkout pico-sdk 1.1.0 instead of 1.2.0 because it doesn't work

PS 2: yes it works with your motherboard BIOS, so you can technically unbrick your mobos like this. You just need 3v3 as the supply as 5v would fry the chip instantly. You just need to follow this diagram.
https://www.rototron.info/wp-content/uploads/PiEeprom09.jpg

[hanetzer]

PS 2: yes it works with your motherboard BIOS, so you can technically unbrick your mobos like this. You just need 3v3 as the supply as 5v would fry the chip instantly.
what about mobos that use 1v8 chips tho?

[nezza]

You need level shifters for those

[nikp123]

It should go without saying, but PLEASE do check your SPI flash chips documentation before you do irreversible damage to your hardware.