Flash read/write error via SPI3

[Andy Chang]

Hi,

I'm using SPI3 to control an external flash for evaluation.

I implemented a stress test project for read/write functionality on nRF52840DK, but got some errors.

Seems that when system is busy,  spi3 read/write function will work abnormal.

After booting, project will start write data to external flash and read back to verify data.

I use work queue to control led for implement a breath light and turn on/off this function by command.

After I turn on the led function(led on), the reading and writing of the external flash started to have errors.

The test project is attached in the attachment.

2211.flash_test_error.zip

SDK: NCS 2.3.0

Andy.

[Håkon Alseth]

Hi again,

 

There's two options that I've seen here that helps the scenario.

1. Change the MAIN_THREAD_PRIORITY to -2 (reduces the chance of the issue occurring)

2. Update to NCS main - this completely eliminates the issue.

 

I haven't found which PR/commit in zephyr that has fixed this issue, but it will be included in the next NCS version.

 

Kind regards,

Håkon

[Andy Chang]

What does "Update to NCS main" mean?

[Håkon Alseth]

Hi,

 

Andy Chang said:

What does "Update to NCS main" mean?

Run NCS main branch, ie. a place between former tagged version (v2.3.0 at this point) and the upcoming v2.4.0.

 

This issue will be fixed in NCS v2.4.0.

 

Kind regards,

Håkon

[Andy Chang]

 Can you let us know the root cause and the resolution?  (the specific github commit is preferred)

[Håkon Alseth]

Hi,

 

My apologies for the late reply.

This was fixed with one of the large upmerge (to keep ncs/zephyr in sync. with upstream zephyr).

Could you confirm if you see this issue on NCS v2.4.0-rc2?

 

Kind regards,

Håkon