External flash integration with nRF5340 custom board

[roshangeoroy]

Hi

I'm currently working on integrating an AT25EU0021A-MAHN-T external flash onto my custom board, which features the nRF5340 chip. I'm using ncs v2.2.0, and I'm facing difficulties configuring the device tree for this external flash. 

I attempted to replicate the structure of the mx25r64 DTS from the nrf5340dk_nrf5340 DTS files, but unfortunately, I haven't been successful in getting it to work.

When I run the spi_flash example, I encounter the following error:

JEDEC ID [1f 11 01] expect [c2 28 17]

I suspect this issue is related to ID matching within the qspi nor drivers. When I commented out the checking part, the device initializes, but the spi_flash writing tests fail.

I'd greatly appreciate if you could specify the steps including the changes in device tree and configurations to properly integrate AT25EU0021A-MAHN-T with my custom board.

Thanks,

Roshan

[Håkon Alseth]

Hi,

 

Different flash ICs have different JEDEC ID's.

Try changing it to your ID in the .overlay or board dts file.

 

Please note that you will highly likely need to change other parameters towards erase time, enter/exit DPD, etc.

 

Kind regards,

Håkon