Non-pico rp2040 based MCUs don't compile correctly

[Plastidip223]

Compiling klipper.uf2 for the official rp2040 based "pico" seems to work great.

I've compiled and flashed my rp2040 based "QT PY" board a few times and I can't get it to boot.
The same flash boots on a pico.

The rp2040 code is based on the 1.2 SDK. The newer 1.3 SDK does a better job of defining various rp2040 based boards.

I'll keep digging around in the source to see how to change the hardware config.

I'd love to see the rp2040 code updated to the newer SDK and the board definitions similarly abstracted into headers and/or configurable in make menuconfig.

I have not attached my logs. The MCU is not seen as a USB device.

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[KevinOConnor]

The rp2040 chip does not have its own builtin flash chips - instead it relies on external SPI based flash chips. When I ported Klipper to the rp2040, I only added support for the flash chips present on the pico board (though many other devices also use the same type of flash). The rp2040 SDK does have support for other flash chips, but they were not added to Klipper. I suspect the issue you are having is that your board has a different flash chip.

A developer would need to add support for other flash chips and to Kconfig (aka "make menuconfig"). It's the code in lib/rp2040/boot_stage2/.

-Kevin