zephyr

History

Anas Nashif 5060ca6a30 cmake: increase minimal required version to 3.13.1 Move to latest cmake version with many bug fixes and enhancements. Signed-off-by: Anas Nashif <anas.nashif@intel.com> Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>		2019-01-03 11:51:29 -05:00
..
src	samples: driver: i2c_scanner: use arduino-defined device if available	2019-01-02 13:02:38 +01:00
CMakeLists.txt	cmake: increase minimal required version to 3.13.1	2019-01-03 11:51:29 -05:00
README.rst	…
overlay-nrf52.conf	…
prj.conf	…
sample.yaml	…

README.rst

.. _i2c_scanner:

I2C Scanner sample
##################

Overview
********
This sample sends I2C messages without any data (i.e. stop condition
after sending just the address). If there is an ACK for the
address, it prints the address as ``FOUND``.

.. warning:: As  there  is  no  standard I2C detection command, this sample
   uses arbitrary SMBus commands (namely SMBus quick write and SMBus
   receive byte) to probe for devices.  This sample program can confuse
   your I2C bus, cause data loss, and is known to corrupt
   the Atmel AT24RF08 EEPROM found on many IBM Thinkpad laptops.
   See also the `i2cdetect man page
   <http://manpages.ubuntu.com/manpages/bionic/man8/i2cdetect.8.html>`_

Building and Running
********************
.. zephyr-app-commands::
   :zephyr-app: samples/drivers/i2c_scanner
   :board: nrf52840_blip
   :conf: "prj.conf overlay-nrf52.conf"
   :goals: build flash