zephyr

History

Andrzej Głąbek be02edb050 drivers/flash/nrf_qspi_nor: Add support for nRF53 Series SoCs Improve the way the nrf_qspi_nor driver configures the SCK frequency, to properly support QSPI also on nRF53 Series SoCs that use a different base clock frequency (96 MHz). Add also a relevant configuration in the spi_flash sample so that it can run on the nRF5340 DK. Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>		2020-11-10 21:01:37 +02:00
..
boards	drivers/flash/nrf_qspi_nor: Add support for nRF53 Series SoCs	2020-11-10 21:01:37 +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	…
README.rst	samples: spi_flash: add README	2020-08-27 12:39:43 -04:00
prj.conf	…
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!