zephyr

History

Stephane D'Alu 9ee2aff917 nrf52840_mdk: support qspi flash Added support for installed MX25R64 QSPI NOR flash. Signed-off-by: Stephane D'Alu <sdalu@sdalu.com>		2020-10-21 17:34:26 +02:00
..
boards	nrf52840_mdk: support qspi flash	2020-10-21 17:34:26 +02:00
src	samples: drivers: spi_flash: add support for arty_a7_arm_designstart_m3	2020-09-02 15:02:03 +02:00
CMakeLists.txt	samples: make find_package(Zephyr...) REQUIRED	2020-05-29 10:47:25 +02:00
prj.conf
README.rst	samples: spi_flash: add README	2020-08-27 12:39:43 -04:00
sample.yaml	samples/drivers/spi_flash: fix sample regex	2020-06-28 23:51:23 -04:00

README.rst

.. _spi-nor-sample:

JEDEC SPI-NOR Sample
####################

Overview
********

This sample demonstrates using the flash API on a SPI NOR serial flash
memory device.  While trivial it is an example of direct access and
allows confirmation that the flash is working and that automatic power
savings is correctly implemented.

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

The application will build only for a target that has a :ref:`devicetree
<dt-guide>` entry with ``jedec,spi-nor`` as a compatible.

.. zephyr-app-commands::
   :zephyr-app: samples/drivers/spi_flash
   :board: nrf52840dk_nrf52840
   :goals: build flash
   :compact:

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

.. code-block:: console

   *** Booting Zephyr OS build zephyr-v2.3.0-2142-gca01d2e1d748  ***

   JEDEC QSPI-NOR SPI flash testing
   ==========================

   Test 1: Flash erase
   Flash erase succeeded!

   Test 2: Flash write
   Attempting to write 4 bytes
   Data read matches data written. Good!