ardupilot/libraries/AP_HAL_Empty/AP_HAL_Empty.h

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#ifndef __AP_HAL_EMPTY_H__
#define __AP_HAL_EMPTY_H__
/* Your layer exports should depend on AP_HAL.h ONLY. */
#include <AP_HAL/AP_HAL.h>
/**
* Umbrella header for AP_HAL_Empty module.
* The module header exports singleton instances which must conform the
* AP_HAL::HAL interface. It may only expose implementation details (class
* names, headers) via the Empty namespace.
* The class implementing AP_HAL::HAL should be called HAL_Empty and exist
* in the global namespace. There should be a single const instance of the
* HAL_Empty class called AP_HAL_Empty, instantiated in the HAL_Empty_Class.cpp
* and exported as `extern const HAL_Empty AP_HAL_Empty;` in HAL_Empty_Class.h
*
* All declaration and compilation should be guarded by CONFIG_HAL_BOARD macros.
* In this case, we're using CONFIG_HAL_BOARD == HAL_BOARD_EMPTY.
* When creating a new HAL, declare a new HAL_BOARD_ in AP_HAL/AP_HAL_Boards.h
*
* The module should also export an appropriate AP_HAL_MAIN() macro iff the
* appropriate CONFIG_HAL_BOARD value is set.
* The AP_HAL_MAIN macro expands to a main function (either an `int main (void)`
* or `int main (int argc, const char * argv[]), depending on platform) of an
* ArduPilot application, whose entry points are the c++ functions
* `void setup()` and `void loop()`, ala Arduino.
*/
#include "HAL_Empty_Class.h"
#include "AP_HAL_Empty_Main.h"
#endif //__AP_HAL_EMPTY_H__