NR5340DK + spi_flash example: mx25r6435f@0: device not ready

RE: NR5340DK + spi_flash example: mx25r6435f@0: device not ready

Chasen — Wed, 17 Jul 2024 16:51:11 GMT

I was able to capture a couple of traces this morning, but could only do 2 at a time

CLK(Blue) + SIO_0/SI(Red)

CLK(Blue) + SIO_0/SI(Red) -Zoomed

CLK(Blue) + SIO_1/SO(Red)

CLK(Blue) + SIO_1/SO(Red) - Zoomed

I tried slowing the clock down to see if it was a signal integrity issue, but does seems like 6MHz is the slowest I can go on the nRF53. If you have anything else I could try, let me know. In the mean time ill work on bringup of another board in hopes that it is a fault connection or chip.

Thanks again!

RE: NR5340DK + spi_flash example: mx25r6435f@0: device not ready

Chasen — Wed, 17 Jul 2024 08:01:55 GMT

Hello Vidar,

Thanks for the quick response! Ill try and probe the additional signals and report back.

RE: NR5340DK + spi_flash example: mx25r6435f@0: device not ready

Vidar Berg — Wed, 17 Jul 2024 07:39:43 GMT

Hello,

The problem reported by the OP was likely caused by a QSPI NOR driver bug that was present in SDK v2.5.2. This bug was fixed in v2.5.3, which you are currently using.

Ref. https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/releases_and_maturity/releases/release-notes-2.5.3.html

Fix: https://github.com/zephyrproject-rtos/zephyr/pull/71373/commits/2ece3803177a6b4567f6d8465bacb3a613d9a1ab

Are you able to probe the other two lines to check if the flash is responding at all?

Edit: Forgot to add that nrfjprog is only able to interface with the external flash when the standard pinout is used.

RE: NR5340DK + spi_flash example: mx25r6435f@0: device not ready

Chasen — Wed, 17 Jul 2024 07:17:26 GMT

Hello Vidar,

I am experiencing the same issue however it is on a custom board based n the nrf5340dk. The flash chip is the same as the one used on the dk. The only differrence is that I made a mistake in my schematic, and swapped CS and SCLK. I was able to swap them in the device tree and verified with a scope that the change registered properly.

Yellow - Clock input at chip

Blue - CS input at chip

Left - nF5340DK schematic

Right - Custom Board

When I attempt to run the spi_flash example code I receive the following.

And when I attempt to run the erase flash command referenced above, I get an error. However I get the error when I attempted it on my nRF5340dk as well.

attached is the log.log after I run the command.

Any suggestions would greatly be appreciated!

Thank you in advance!

devzone.nordicsemi.com/.../7848.log.log

RE: NR5340DK + spi_flash example: mx25r6435f@0: device not ready

tcube — Thu, 21 Mar 2024 14:38:00 GMT

It's fixed the issue.

Thanks

RE: NR5340DK + spi_flash example: mx25r6435f@0: device not ready

Vidar Berg — Wed, 20 Mar 2024 18:34:45 GMT

Hello,

Please try to run the example again after having erased the flash with nrfjprog: nrf52840DK QSPI Flash memory . That, or try to power-cycle the DK.

$ nrfjprog --qspieraseall -f nrf53

Best regards,

Vidar