external memory SPI pin configuration in serial ltm application

RE: external memory SPI pin configuration in serial ltm application

Håkon Alseth — Tue, 23 Apr 2024 08:18:44 GMT

Hi,

Add the overlay and flash; check the runtime output of the sample to see if it booted correctly.

You can also check the partition layout to verify that the mcuboot_secondary is located in the "flash_primary" or "external_flash" region.

to verify correct connections and overlay; please have a look at for instance jesd216 sample and run this on your board.

Kind regards,

Håkon

RE: external memory SPI pin configuration in serial ltm application

Amol_Chor — Tue, 23 Apr 2024 08:11:39 GMT

Thanks for quick response !!

I do not want to modify the application firmware, only configure the project configuration files and overlay files.
Using this I want to achieve the enable the external flash and test using sample app.

[quote userid="2115" url="~/f/nordic-q-a/106810/external-memory-spi-pin-configuration-in-serial-ltm-application/480118"]Once you have setup the overlay, you can for instance run a FOTA:[/quote]

(In my region lte-m/nbIoT network not available ) so I am not able to test FOTA commands.

[quote userid="2115" url="~/f/nordic-q-a/106810/external-memory-spi-pin-configuration-in-serial-ltm-application/480118"]The former attached overlay sets up the mx25r64[/quote]

I am using the same chip as external flash, please let me know the basic configuration on version nrf connect sdk 2.5.0, also sample application (how to validate external memory)

RE: external memory SPI pin configuration in serial ltm application

Håkon Alseth — Tue, 23 Apr 2024 07:45:19 GMT

Once you have setup the overlay, you can for instance run a FOTA:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/applications/serial_lte_modem/doc/FOTA_AT_commands.html

[quote user="Amol_Chor"]Is there any specific overlay file to use external flash memory?[/quote]

The former attached overlay sets up the mx25r64 - if you use another flash device, you will need to populate the jedec-id and subsequent parameters per your chosen device.

You can find some of these parameters by running this sample: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/samples/drivers/jesd216/README.html

However; please note that you will need an overlay present matching the board that you've chosen. Here's an example for the nRF52840DK: https://github.com/nrfconnect/sdk-zephyr/blob/v3.5.99-ncs1/samples/drivers/jesd216/boards/nrf52840dk_nrf52840_spi.overlay

Kind regards,

Håkon

RE: external memory SPI pin configuration in serial ltm application

Amol_Chor — Tue, 23 Apr 2024 06:46:38 GMT

How can we test the connected external flash?
Is there any specific overlay file to use external flash memory?

RE: external memory SPI pin configuration in serial ltm application

Håkon Alseth — Wed, 20 Dec 2023 13:07:36 GMT

Hi,

Yes, you can add an entry for &spiX overlay, with new pinctrl definitions.

Here's an example:

arduino_spi: &spi3 {
	compatible = "nordic,nrf-spim";
	status = "okay";
	cs-gpios = <&arduino_header 16 GPIO_ACTIVE_LOW>; /* D10 */
	pinctrl-0 = <&my_spi3_default>;
	pinctrl-1 = <&my_spi3_sleep>;
	pinctrl-names = "default", "sleep";
	cs-gpios = <&arduino_header 16 GPIO_ACTIVE_LOW>, /* D10 */
		   <&gpio0 25 GPIO_ACTIVE_LOW>;
	mx25r64: mx25r6435f@1 {
		compatible = "jedec,spi-nor";
		status = "okay";
		reg = <1>;
		spi-max-frequency = <8000000>;
		jedec-id = [c2 28 17];
		sfdp-bfp = [
			e5 20 f1 ff  ff ff ff 03  44 eb 08 6b  08 3b 04 bb
			ee ff ff ff  ff ff 00 ff  ff ff 00 ff  0c 20 0f 52
			10 d8 00 ff  23 72 f5 00  82 ed 04 cc  44 83 48 44
			30 b0 30 b0  f7 c4 d5 5c  00 be 29 ff  f0 d0 ff ff
		];
		size = <67108864>;
		has-dpd;
		t-enter-dpd = <10000>;
		t-exit-dpd = <35000>;
	};	
};

&pinctrl {
	my_spi3_default: my_spi3_default {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 13)>,
				<NRF_PSEL(SPIM_MISO, 0, 12)>,
				<NRF_PSEL(SPIM_MOSI, 0, 11)>;
			nordic,drive-mode = <NRF_DRIVE_H0H1>;
		};
	};

	my_spi3_sleep: my_spi3_sleep {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 13)>,
				<NRF_PSEL(SPIM_MISO, 0, 12)>,
				<NRF_PSEL(SPIM_MOSI, 0, 11)>;
			low-power-enable;
		};
	};
};

Please note that if you use external flash in mcuboot (for dual banking), you will also have to add specific overlay in your mcuboot configuration as well, similar as done in the asset tracker application:

https://github.com/nrfconnect/sdk-nrf/tree/v2.5.0/applications/asset_tracker_v2/child_image/mcuboot/boards

Kind regards,

Håkon