zephyr

History

Francois Ramu 503a3d78d2 samples: subsys: nvs fix hard fault when running on stm32 targets on stm32f091 and stm32g071 nucleo boards This avoids HARD Fault when reaching the last reboot Disable the external flash memory of the b_u585i_iot02 target to end the test properly Signed-off-by: Francois Ramu <francois.ramu@st.com>		2024-04-11 09:08:52 +02:00
..
boards	samples: subsys: nvs fix hard fault when running on stm32 targets	2024-04-11 09:08:52 +02:00
src	…
CMakeLists.txt	…
README.rst	…
prj.conf	flash: Move dependency on FLASH_PAGE_LAYOUT where it belongs	2024-04-10 10:01:40 +02:00
sample.yaml	…

README.rst

.. zephyr:code-sample:: nvs
   :name: Non-Volatile Storage (NVS)
   :relevant-api: nvs_high_level_api

   Store and retrieve data from flash using the NVS API.

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/nrf51822 board.

.. zephyr-app-commands::
   :zephyr-app: samples/subsys/nvs
   :board: nrf51dk/nrf51822
   :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
   ...