Interfacing serial flash W25Q32 with nRF52833dk

[Ubaid_M]

Hi,

I am trying to develop an nCS application with serial flash interface, I am using an nRF52833dk & I observed that under the nCS path "v1.8.0\zephyr\drivers\flash"
There is zephyr provided drivers for serial flash, namely "spi_nor".

Though i found a lack of samples or examples utilizing this spi_nor driver, hence  I am having trouble getting started.

Request you kindly to point me or work out and share a project for serial flash interface, I need to refer the prj.conf, .overlay and the main.c to understand the serial flash operations.

Thanking you in advance,

[Kenneth]

Can you take a look at this thread?
https://devzone.nordicsemi.com/f/nordic-q-a/81887/nrf9160-spi-flash-for-cellular-firmware-download/342527#342527 

In principle the same approach should work for the nRF52833. For the nRF52833 you likely should use eitehr spi1 or spi3, since those are enabled by default (status ="okay";):
https://github.com/nrfconnect/sdk-zephyr/blob/main/boards/arm/nrf52833dk_nrf52833/nrf52833dk_nrf52833.dts#L182 

Kenneth

[Ubaid_M]

Hello Kenneth,

Many Thanks,

This is what I needed:

&spi3 {
	compatible = "nordic,nrf-spim";
	status = "okay";
	sck-pin = < 11 >;
	mosi-pin = < 9 >;
	miso-pin = < 28 >;
	cs-gpios = < &gpio0 7 GPIO_ACTIVE_LOW >;
	w25q32jv: w25q32jv@0 {
		compatible = "jedec,spi-nor";
		label = "W25Q32JV";
		reg = < 0 >;
		spi-max-frequency = < 40000000 >;
		wp-gpios = < &gpio0 8 GPIO_ACTIVE_LOW >;
		hold-gpios = < &gpio0 10 GPIO_ACTIVE_LOW >;
		size = < 0x2000000 >;
		has-dpd;
		t-enter-dpd = < 3000 >;
		t-exit-dpd = < 30000 >;
		jedec-id = [ ef 40 16  ];
	};

1. Can you kindly point me on how the dts declaration will change, if I am using "IS25LQ040B"..?

2. Please help me with the main.c code as well for serial flash operations, I couldn't find it in 

Kenneth said:

Can you take a look at this thread?

Thanks,

Ubaid

[Ubaid_M]

Hello Kenneth,

I need to connect two serial flash ICs, one "w25q32jv" and another "IS25LQ040B", on the same SPI peripheral like &spi3 {

1. Kindly suggest how my dts file will look like in this case..?
2. And how will my main.c with serial flash operations will look like..?

Request you to help me with a sample project for the same

Thanks,

Ubaid