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Tomasz Bursztyka e18fcbba5a device: Const-ify all device driver instance pointers Now that device_api attribute is unmodified at runtime, as well as all the other attributes, it is possible to switch all device driver instance to be constant. A coccinelle rule is used for this: @r_const_dev_1 disable optional_qualifier @ @@ -struct device * +const struct device * @r_const_dev_2 disable optional_qualifier @ @@ -struct device * const +const struct device * Fixes #27399 Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>		2020-09-02 13:48:13 +02:00
..
src	device: Const-ify all device driver instance pointers	2020-09-02 13:48:13 +02:00
CMakeLists.txt	…
README.rst	…
prj.conf	…
sample.yaml	…

README.rst

.. _i2c_fujitsu_fram:

I2C Fujitsu FRAM
################

Overview
********
This is a sample app to read and write the Fujitsu MB85RC256V FRAM chip via I2C
on the Quark SE Sensor Subsystem.

This assumes the slave address of FRAM is 0x50, where A0, A1, and A2 are all
tied to ground.

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

This project can be built and executed on as follows:

.. zephyr-app-commands::
   :zephyr-app: samples/drivers/i2c_fujitsu_fram
   :host-os: unix
   :board: quark_se_c1000_devboard
   :goals: run
   :compact:


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

.. code-block:: console

    Wrote 0xAE to address 0x00.
    Wrote 0x86 to address 0x01.
    Read 0xAE from address 0x00.
    Read 0x86 from address 0x01.
    Wrote 16 bytes to address 0x00.
    Read 16 bytes from address 0x00.
    Data comparison successful.