Connecting SPI FLASH M25P40 to nrf5340-DK

[Georg]

Hello,

in our application we want to use a simple serial Spi Flash: M25P40 (only 1 data signal).

For evaluationI I connected this Spi Flash to the nrf5340-DK Board:

Signal	Pin (nrf5340)
CS	P1.12
CLK	P1.13
MOSI	P1.14
MISO	P1.15

I am using the following components:

- nrf5340-DK Board

- SDK 2.0.0

Then I started with software sample "spi_flash":

When running this software  without modification everything works fine, because the

QSPI Flash on the board is used.

Then I added an overlay to the software project in order to adapt

the software to the M25P40 Flash.

When running the software without any further modifications, I get the following output:

How can I find the problem ?

Is there a failure in the overlay ?

Is it the right procedure to adapt an spi flash ?

Best Regards

Georg

[Jørgen Holmefjord]

Hi,

Can you try something similar to the overlay in this post?

Also, note that SPI0 will overlap with UART0 instance in the nRF5340, as these share base address (see Peripheral instantiation).

Best regards,
Jørgen

[Georg]

Hello Jorgen,

thank you for your fast response. and sorry for my late response. I did some modification according to the example but without success.I tried with different SPI numbers. My Question is: How to modify the "spi flash" example to work with an M25P40 serial Spi Flash.

Thank you

Best regards,

Georg