R12 is really in the wrong place - you want it to be on the other side of R14. But it's almost certainly not needed at all. And this doesn't seem to be related to your problem at all - you are evidently able to boot it into BOOTSEL mode, and you must have succeeded in writing something to the flash otherwise it would always come up in bootrom mode even without BOOTSEL pressed.But if I attach R12, I couldn't even go to BOOTSEL mode. I will try changing it to 10k
So reasonable possibilities are:
0) It's actually all working but you just can't see this from the Windows side.
1) You loaded the wrong binary (eg. RP2040 version rather than RP2350)
2) The first part of the binary loaded OK but it is corrupt further down so crashes after starting.
3) The software is all correct, but there is a hardware fault/deficiency such that the board will run in bootrom mode (which uses a slower clock and is generally less demanding) but crashes when switching to full speed.
We haven't seen many reports of RP2350 failures here, but with home-made RP2040 boards the problem (3) was very common. It's not clear if this is more or less likely with RP2350 designs - on the one hand, with the switching regulator RP2350 is more difficult to lay out correctly, but on the other hand maybe it's more likely to just not work at all rather than the half-working that is common with poor RP2040 designs.
Statistics: Posted by arg001 — Thu May 01, 2025 6:48 pm