zephyr

History

Henrik Brix Andersen aab95f09f2 samples: drivers: spi_flash: add support for arty_a7_arm_designstart_m3 Add support for running the JEDEC SPI NOR flash sample on the ARM Cortex-M3 DesignStart FPGA reference implementation. Special care is needed to avoid overwriting part of the FPGA configuration bitstream, which is stored in the onboard QSPI flash. Signed-off-by: Henrik Brix Andersen <henrik@brixandersen.dk>		2020-09-02 15:02:03 +02:00
..
boards	boards: arm: adafruit_feather_nrf52840: add support for QSPI flash	2020-08-19 15:43:57 -05:00
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
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!