zephyr

History

Dominik Ermel 63c2347207 samples/nvs: Switch flash_area_offset to use STORAGE_NODE_LABEL The sample has been defining STORAGE_NODE_LABEL to be used to point to storage partition, but flash_area_offset has still been using "storage" directly. Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>		2022-08-02 15:18:19 +02:00
..
boards	samples: subsys: nvs: disco_l475_iot1: keep quadspi node	2022-07-26 14:34:17 +00:00
src	samples/nvs: Switch flash_area_offset to use STORAGE_NODE_LABEL	2022-08-02 15:18:19 +02:00
CMakeLists.txt
prj.conf
README.rst	samples: subsys: nvs: use nvs_mount	2022-03-01 12:46:34 +01:00
sample.yaml

README.rst

.. _nvs-sample:

NVS: Non-Volatile Storage
#########################

Overview
********

This is a simple application demonstrating use of the NVS
module for non-volatile (flash) storage.  In this application,
a counter is incremented on every reboot and stored in flash,
the application reboots, and the reboot counter data is retrieved.

Requirements
************

* A board with flash support

Building and Running
********************

This sample can be found under :zephyr_file:`samples/subsys/nvs` in the Zephyr tree.

The sample can be build for several platforms, the following commands build the
application for the nrf51dk_nrf51422 board.

.. zephyr-app-commands::
   :zephyr-app: samples/subsys/nvs
   :board: nrf51dk_nrf51422
   :goals: build flash
   :compact:

After flashing the image to the board the output on the console shows the
reboot counter and the boards reboots several times to show the reboot counter
is incremented.

Sample Output
=============

.. code-block:: console

   ***** Booting Zephyr OS v1.12.0-rc1-176-gf091be783 *****
   [fs/nvs] [DBG] nvs_reinit: (Re)Initializing sectors
   [fs/nvs] [DBG] _nvs_sector_init: f->write_location set to c
   [fs/nvs] [INF] nvs_mount: maximum storage length 256 byte
   [fs/nvs] [INF] nvs_mount: write-align: 1, write-addr: c
   [fs/nvs] [INF] nvs_mount: entry sector: 0, entry sector ID: 1
   No address found, adding 192.168.1.1 at id 1
   No key found, adding it at id 2
   No Reboot counter found, adding it at id 3
   Id: 4 not found, adding it
   Longarray not found, adding it as id 4
   Reboot counter history: ...0
   Oldest reboot counter: 0
   Rebooting in ...5...4...3...2...1
   ***** Booting Zephyr OS v1.12.0-rc1-176-gf091be783 *****
   [fs/nvs] [INF] nvs_mount: maximum storage length 256 byte
   [fs/nvs] [INF] nvs_mount: write-align: 1, write-addr: c7
   [fs/nvs] [INF] nvs_mount: entry sector: 0, entry sector ID: 1
   Entry: 1, Address: 192.168.1.1
   Id: 2, Key: ff fe fd fc fb fa f9 f8
   Id: 3, Reboot_counter: 1
   Id: 4, Data: DATA
   Id: 5, Longarray: 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13 14 15 16 17 18
   Reboot counter history: ...1...0
   Oldest reboot counter: 0
   Rebooting in ...5...4...3...2...1
   ...