How to Read & Write onto the External Flash integrated in nRF7002dk

[Obaid Mufiz]

I have an nRF7002dk & its datasheet mentions that there is a 64 Mb external flash memory. The memory is connected through a regular highspeed
Serial Peripheral Interface (SPI) .
The memory is connected to the chip using the following General-Purpose Input/Output (GPIO)s:
P0.11 CS
P0.08 SCLK
P0.09 MOSI
P0.10 MISO

I am trying to run a basic test using the spi_flash sample but looks like it only works with nRF5340 & other nRF5 series boards, nothing about the 7002 dk is mentioned.

What changes do I make in the boards files or create an overlay or conf file ?

You're looking at fairly beginner level developer here, so not much aware of the nrf stuff.

[Håkon Alseth]

Hi,

 

Did you try to run the zephyr/samples/drivers/spi_flash for nrf7002dk/nrf5340/cpuapp board?

It should work out-of-the-box:

*** Booting nRF Connect SDK v2.8.0-a2386bfc8401 ***
*** Using Zephyr OS v3.7.99-0bc3393fb112 ***

mx25r6435f@0 SPI flash testing
==========================

Perform test on single sector
Test 1: Flash erase
Flash erase succeeded!

Test 2: Flash write
Attempting to write 4 bytes
Data read matches data written. Good!!

 

If you get any errors or similar, could you please share those?

 

Kind regards,

Håkon

[Obaid Mufiz]

Hey there,


Yes I did try that but there isn't an option for the nrf7002dk/nrf5340/cpuapp board for this sample.
Check this out:

[Håkon Alseth]

Hi,

 

Try compiling the sample. It does not need an overlay, because the SPI flash is already setup in the board-files themselves.

 

Kind regards,

Håkon

[Obaid Mufiz]

Tried building it without an overlay & these are the errors I got when I built it with nrf7002dk/nrf5340/cpuapp board: 

build stopped: subcommand failed.
FATAL ERROR: command exited with status 1: 'C:\ncs\toolchains\2d382dcd92\opt\bin\cmake.EXE' --build 'c:\nordic\myApps\spi_flash\build'

* The terminal process terminated with exit code: 1.
* Terminal will be reused by tasks, press any key to close it.


However when I build it with nrf5340dk/nrf5340/cpuapp board it is successfully build, no errors whatsoever.

[Håkon Alseth]

Hi,

Can you please share the full log output?

 

Kind regards,

Håkon

[Obaid Mufiz]

I'm attaching it to doc since there is a word limit for the comments.
Click here: drive.google.com/.../view

[Håkon Alseth]

Hi,

 

My apologies, I was testing on a different SDK version. 

The problem is the naming in the spi_flash/src/main.c file, where it should pick up on the "jedec,spi-nor" compatible type.

Could you try this specific commit and see if it works?

https://github.com/nrfconnect/sdk-zephyr/commit/54e61b025e43136df285c611488a1304a787a795

 

Kind regards,

Håkon

[Obaid Mufiz]

Thanks a lot.

It worked now with that commit.

mx25r6435f@0 SPI flash testing
==========================

Perform test on single sector
Test 1: Flash erase
Flash erase succeeded!

Test 2: Flash write
Attempting to write 4 bytes
Data read matches data written. Good!!

[Håkon Alseth]

Glad to hear it is working now!

My deepest apologies for not seeing this issue before recently. Hope you have a wonderful day!

 

Kind regards,

Håkon