The initial idea was to export all pins to be used at once, so we
created _export_pins() to take all of them and a wrapper method,
_export_pin() to export a single one. However we never export more than
one pin at once.
- Replaced PATH_MAX by the maximum stack memory it will use for GPIO
paths
- Added more information to error logs
- Removed the '/n' when writing to GPIO sysfs files
- Using Linux Util write_file() on _pinMode()
Make sure pinMode() method exports the pin before using it. Otherwise
the export method would need to be called, differently from other GPIO
implementations.
Since now export_pin and export_pins are called only internally, reduce
their visibility to protected.
The current approach to access the same memory location by using a
reference is giving this warning:
../libraries/AP_AccelCal/AccelCalibrator.cpp: In constructor ‘AccelCalibrator::AccelCalibrator()’:
../libraries/AP_AccelCal/AccelCalibrator.cpp:34:64: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
_param_struct(*reinterpret_cast<struct param_t *>(&_param_array))
^
../libraries/AP_AccelCal/AccelCalibrator.cpp: In member function ‘void AccelCalibrator::run_fit(uint8_t, float&)’:
../libraries/AP_AccelCal/AccelCalibrator.cpp:336:79: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]
struct param_t &fit_param(*reinterpret_cast<struct param_t *>(¶m_array));
^
Using a union allows us to get rid of the warning, make sure the sizes of the
different structs match and have a more elegant solution.
@Description: X-Axis deceleration threshold to notify the crash detector that there was a possible impact which helps disarm the motor quickly after a crash. This value should be much higher than normal negative x-axis forces during normal flight, check flight log files to determine the average IMU.x values for your aircraft and motor type. Higher value means less sensative (triggers on higher impact). For electric planes that don't vibrate much during fight a value of 25 is good (that's about 2.5G). For petrol/nitro planes you'll want a higher value. Set to 0 to disable the collision detector.
Tom Pittenger
Andrew Tridgell
Lucas De Marchi
José Roberto de Souza
Ricardo de Almeida Gonzaga
Peter Barker
Randy Mackay