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0b90fd5adf
As both C and C++ standards require applications running under an OS to
return 'int', adapt that for Zephyr to align with those standard. This also
eliminates errors when building with clang when not using -ffreestanding,
and reduces the need for compiler flags to silence warnings for both clang
and gcc.
Most of these changes were automated using coccinelle with the following
script:
@@
@@
- void
+ int
main(...) {
...
- return;
+ return 0;
...
}
Approximately 40 files had to be edited by hand as coccinelle was unable to
fix them.
Signed-off-by: Keith Packard <keithp@keithp.com>
.. _mpr-sample: MPR Pressure Sensor ################### Overview ******** This sample application periodically (1Hz) measures atmospheric pressure in kilopascal. The result is written to the console. References ********** - MPR: https://sensing.honeywell.com/micropressure-mpr-series Wiring ****** This sample uses an MPRLS0025PA00001A sensor controlled using the i2c interface. Connect **VIN**, **GND** and Interface: **SDA**, **SCL**. Building and Running ******************** This project outputs sensor data to the console. It requires a sensor from the MPR series. It does not work on QEMU. In the sample below the :ref:`arduino_due` board is used. .. zephyr-app-commands:: :zephyr-app: samples/sensor/mpr :board: arduino_due :goals: build flash Sample Output ************* .. code-block:: console pressure value: 101.976303 kPa pressure value: 101.986024 kPa pressure value: 101.989736 kPa pressure value: 101.987424 kPa pressure value: 101.992099 kPa pressure value: 101.989171 kPa pressure value: 101.984226 kPa <repeats endlessly>