RE: nRF5340 - Connect External Flash (MX25U12832F)

AHaug — Fri, 11 Aug 2023 06:22:30 GMT

Happy to help! :)

Kind regards,
Andreas

RE: nRF5340 - Connect External Flash (MX25U12832F)

skim — Thu, 10 Aug 2023 16:54:44 GMT

Thanks to your help, I was able to solve the problem. Thank you again!

RE: nRF5340 - Connect External Flash (MX25U12832F)

AHaug — Wed, 09 Aug 2023 12:05:48 GMT

Hi,

[quote user=""]- Build Error: Attached detailed error messages at the bottom of the post. How do I fix this?[/quote]

It looks like the error is caused by a missing configuration. #define PCD_CMD_ADDRESS PM__PCD_SRAM_ADDRESS could indicate that you're missing one. I suspect it is this one https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/kconfig/index.html#CONFIG_PCD_CMD_ADDRESS or other pcd-related configurations.

[quote user=""]- Enabled BT, so had to use Partition Manager. I used CONFIG_PM_PARTITION_SIZE_LITTLEFS and CONFIG_PM_PARTITION_REGION_LITTLEFS_EXTERNAL to set littlefs_storage's size. How do I achieve the same thing using pm_static.yml?[/quote]

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/scripts/partition_manager/partition_manager.html#partition-managers and https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/scripts/partition_manager/partition_manager.html#static-configuration is a great starting point for getting into how static partitioning works.

After that I recommend you to examine the nRF machine learning sample for (or other samples in the SDK) that uses a pm_static.yml to see how they've used the static partitioning developer.nordicsemi.com/.../README.html

[quote user=""]- Here is partition manager report. Under external_flash, the size of external_flash is negative. How do I fix this?[/quote]

It looks like you've defined the flash size in MegaBytes and not Megabits. Could you verify if that is the case and revert to Megabits in case you've defined it as Megabytes?

[quote user=""]- in overlay, how do I fill "sfdp-bfp" section for mx25u128?[/quote]

I recommend you to have a look at JEDEC SPI-NOR sample, this case How to get started with NOR flash on Zephyr ? and to most importantly use this sample (modified with your external flash) https://github.com/zephyrproject-rtos/zephyr/tree/main/samples/drivers/jesd216 to generate the block you need to input in the device tree for your external flash. Copy the ouptut and enter it into the devicetree of your project.

Once you've generated the matrix, you can crossexamine it with the datasheet of the mx25u128

So an angle of attack for how to generate the matrix is to use this sample with your external flash, copy the output and enter it into your devicetree in your project. Once thats been done, we may be able to do the cross-checking with the datasheet for the external flash to learn whats been input.

The more complicated answer to this question is that the sbfp matrix is something that you will have to fill out based on the header mentioned in https://www.taterli.com/wp-content/uploads/2017/07/JESD216.pdf and what items in the datasheet of your memory chip that corresponds to those items.

Kind regards,
Andreas