Flash storage in nRF52 using nrf connect sdk

[Sunil vignesh]

Hi,

I need to store the 1kB of data in the flash storage and it need to be read anytime and change the data anywhere.

I am using nrf52840 DK and also nrf5340 DK to perform these Flash storage

I found the example code in this link

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/reference/storage/nvs/nvs.html?highlight=flash%20storage

and i have tested the code.

I have difficulty to change the data storage address. where we need to change the starting address. size of flash storage. If i use DFU how to assign the flash storage

[Hakon]

Hello,

have you looked at the Zephyr NVS sample, located in zephyr\samples\subsys\nvs? You can set the starting address by modifying the nvs_fs struct. I'm not sure that size is something that can be set statically.

 

If i use DFU how to assign the flash storage

 I'm not sure what you mean by this.

[Sunil vignesh]

Hi Hakon, shall i get the reply for previous message

[Sunil vignesh]

Hi any update?

[Sunil vignesh]

Hi Hakon,

I have checked this and print the info value

but I tried to change the value but it not write the given address

Did i need to change any thing ?

[Sunil vignesh]

Any update?

[Hakon]

Sunil vignesh said:

but it not write the given address

What was the log output?

[Sunil vignesh]

Hi ,

I found this lines in nrf52dk_nrf52832.dts

boot_partition: partition@0 {
			label = "mcuboot";
			reg = <0x00000000 0xc000>;
		};
		slot0_partition: partition@c000 {
			label = "image-0";
			reg = <0x0000C000 0x32000>;
		};
		slot1_partition: partition@3e000 {
			label = "image-1";
			reg = <0x0003E000 0x32000>;
		};
		scratch_partition: partition@70000 {
			label = "image-scratch";
			reg = <0x00070000 0xa000>;
		};
		storage_partition: partition@7a000 {
			label = "storage";
			reg = <0x0007a000 0x00006000>;
		};

there it show the

storage_partition: partition@7a000 {
            label = "storage";
            reg = <0x0007a000 0x00006000>;
        };

if 0x7a000 then what is 0x00006000  (storage size?) how it calculate in kB.

and if i change the start address from 0x7a000 to 0x7000 then what will be the storage size .

My case i need to store the

1. Bond state PM address

2. 1 KB (Kilo Byte) sensor data

3. 2 KB second sensor data

[Hakon]

Sunil vignesh said:

if 0x7a000 then what is 0x00006000  (storage size?) how it calculate in kB.

 6000 hex is 24 kB.

 

Sunil vignesh said:

and if i change the start address from 0x7a000 to 0x7000 then what will be the storage size .

 You can't change it in the dts file directly. You need to modify the partition manager with a pm_static.yml file.