zephyr/samples/sensor/max6675
Gerard Marull-Paretas c7b5b3c419 samples: migrate includes to contain <zephyr/...> prefix
In order to bring consistency in-tree, migrate all samples to the use
the new prefix <zephyr/...>. Note that the conversion has been scripted:

```python
from pathlib import Path
import re

EXTENSIONS = ("c", "h", "cpp", "rst")

for p in Path(".").glob("samples/**/*"):
    if not p.is_file() or p.suffix and p.suffix[1:] not in EXTENSIONS:
        continue

    content = ""
    with open(p) as f:
        for line in f:
            m = re.match(r"^(.*)#include <(.*)>(.*)$", line)
            if (m and
                not m.group(2).startswith("zephyr/") and
                (Path(".") / "include" / "zephyr" / m.group(2)).exists()):
                content += (
                    m.group(1) +
                    "#include <zephyr/" + m.group(2) +">" +
                    m.group(3) + "\n"
                )
            else:
                content += line

    with open(p, "w") as f:
        f.write(content)
```

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
2022-05-06 11:29:59 +02:00
..
boards samples: sensor: add MAX6675 sample application 2021-02-17 14:33:29 +01:00
src samples: migrate includes to contain <zephyr/...> prefix 2022-05-06 11:29:59 +02:00
CMakeLists.txt cmake: increase minimal required version to 3.20.0 2021-08-20 09:47:34 +02:00
prj.conf samples: sensor: add MAX6675 sample application 2021-02-17 14:33:29 +01:00
README.rst samples: sensor: add MAX6675 sample application 2021-02-17 14:33:29 +01:00
sample.yaml samples: sensor: add MAX6675 sample application 2021-02-17 14:33:29 +01:00

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>