zephyr

History

Kwon Tae-young 94e419c624 samples: i2c_scanner: support output like i2c_detect Supports output in the same format as the i2c_detect command. Signed-off-by: Kwon Tae-young <tykwon@m2i.co.kr>		2019-12-18 21:54:43 +01:00
..
src	samples: i2c_scanner: support output like i2c_detect	2019-12-18 21:54:43 +01:00
CMakeLists.txt	license: cleanup: add SPDX Apache-2.0 license identifier	2019-04-07 08:45:22 -04:00
overlay-nrf52.conf
prj.conf
README.rst	global: Remove leading/trailing blank lines in files	2019-12-11 19:17:27 +01:00
sample.yaml	tests: fix test identifiers	2019-12-09 15:53:44 -05:00

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