PSRAM init failed!

[Chandler-Kluser]

I have fully build linux Image, flashed into sdcard as well as the ch32v003 firmware, wired everything like kicad schematics but I have got this UART debug message:

Here is my test setup just to check out if that is working:

here is my PSRAM chip, maybe it is fake?

[tvlad1234]

Could you try it without the SD card adapter connected (the whole adapter, not just the micro-sd)? Those adapters don't really work well on 3.3V systems (they're meant to work with 5V stuff, as they have the level shifter on them) and I have a feeling it's interfering with the SPI bus.

[Chandler-Kluser]

sure! I will try that and keep it up to date with the information, but does it boot without a linux image?

[Chandler-Kluser]

tested right now with entire module disconnected, still getting PSRAM init failed :/

BTW, thanks for the great work, I am trying to get it to work here

[tvlad1234]

Hmm, if the wiring is correct it should work. Do you have any other way to confirm that the PSRAM chip is good?

[Chandler-Kluser]

I will test the batch I bought on other project just to make sure. If the setup works without TF, what is it for?

As soon as I check the ICs (if they are fake or not) I share with you (thanks a lot, btw)

[tvlad1234]

It doesn't work without an SD card, I just wanted to rule out the SD card interfering with the SPI bus while the PSRAM is initializing. You're very welcome, glad you're interested in my project!

[Chandler-Kluser]

Got it ☺️

[Chandler-Kluser]

I believe I got a batch of fake ICs on AliExpress, in the same tape came ESP32-PSRAM64H with and without pin1 marker. None of the models worked. Got the same PSRAM fail screen...

I will try to get a reliable seller to test it here