Utilize external flash with nrf9160 SiP on Custom board.

Question

Hi, 
 I would like to use the external flash to increase the internal flash, no intention, at the moment, to use it for MCUBoot file or FOTA . 
 How do I configure it, if it is even possible. 
 Info: 
 - nRF Connect SDK: 2.0.0 
 - nrf9160 SiP on custom board. 
 - Flash commuincate over SPI. 
 - Flash is working. 
 
 Thanks in advance.

Sigurd Hellesvik · Accepted Answer

Hi, 
 Our Partition Manager handles the partitioning and decides what should go into internal or external flash. 
 When external flash is enabled, the partition manager generally places partitions into external flash automatically. You can configure that using CONFIG_PM_EXTERNAL_FLAH_[...] to configure this or using pm_static.yml. 
 If you need to put some generic data into external flash, I would advise using either a File System or NVS . 
 Replay said: I had hoped that some other data e.q. .text .data would be placed in external flash instead 
 I have not seen use-cases where you need to place something in external flash in compile time. 
 If you need to, you can use nrfjprog to write data to external flash manually. See nrfjprog --help for more information. 
 Regards, Sigurd Hellesvik

Replay · Answer

Thank you for your help. 
 Sigurd Hellesvik said: Have you debugged the issue any more since the last comment? 
 No, I have stopped trying finding the issue. Everything works fine in SDK v2.2.0, so I'm not upgrading SDK any further. 
 Recap to everyone who finds the thread: 
 - Nrf9160 with external flash (SPI_NOR). 
 - Cannot use the external flash for storing mcuboot_secondary when using NCS v2.1.3 and below. Without change to the SDK. 
 - NCS v2.2.0 seems to get everything working. 
 - NCS v2.3.0 have some changes that break my boot sequence, I have not found a way to fix this.

Utilize external flash with nrf9160 SiP on Custom board.

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