zephyr

History

Torsten Rasmussen 1cccc8a8fe cmake: increase minimal required version to 3.20.0 Move to CMake 3.20.0. At the Toolchain WG it was decided to move to CMake 3.20.0. The main reason for increasing CMake version is better toolchain support. Better toolchain support is added in the following CMake versions: - armclang, CMake 3.15 - Intel oneAPI, CMake 3.20 - IAR, CMake 3.15 and 3.20 Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>		2021-08-20 09:47:34 +02:00
..
boards
src
CMakeLists.txt
prj.conf
README.rst
sample.yaml

README.rst

MAX6675 K-thermocouple to digital converter
###########################################

Overview
********

This is a sample application to read an external MAX6675
cold-junction-compensated K-thermocouple to digital converter.

Requirements
************

- MAX6675 wired to your board SPI bus
- K-thermocouple connected to MAX6675 T+/T- inputs

References
**********

 - MAX6675: https://datasheets.maximintegrated.com/en/ds/MAX6675.pdf

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

This sample can be built with any board that supports SPI. A sample overlay is
provided for the NUCLEO-F030R8 board.

.. zephyr-app-commands::
   :zephyr-app: samples/sensor/max6675
   :board: nucleo_f030r8
   :goals: build
   :compact:

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

The application will read and print sensor temperature every second. Note that
temperature fetch will fail if the K-thermocouple is not connected. This is
because MAX6675 is able to detect if the K-thermocouple is connected or not.

.. code-block:: console

   Temperature: 25.25 C
   Temperature: 25.50 C

   <repeats endlessly every second>