//?---------------------------------------------------------------------------
//?Created?by?Tim?Eckel?-?teckel@leethost.com
//
//?See?NewPing.h?for?license?purpose?syntax?version?history?links?etc.
//?---------------------------------------------------------------------------

#include?“NewPing.h“


//?---------------------------------------------------------------------------
//?NewPing?constructor
//?---------------------------------------------------------------------------

NewPing::NewPing（uint8_t?trigger_pin?uint8_t?echo_pin?unsigned?int?max_cm_distance）?{
#if?DO_BITWISE?==?true
	_triggerBit?=?digitalPinToBitMask（trigger_pin）;?//?Get?the?port?register?bitmask?for?the?trigger?pin.
	_echoBit?=?digitalPinToBitMask（echo_pin）;???????//?Get?the?port?register?bitmask?for?the?echo?pin.

	_triggerOutput?=?portOutputRegister（digitalPinToPort（trigger_pin））;?//?Get?the?output?port?register?for?the?trigger?pin.
	_echoInput?=?portInputRegister（digitalPinToPort（echo_pin））;?????????//?Get?the?input?port?register?for?the?echo?pin.

	_triggerMode?=?（uint8_t?*）?portModeRegister（digitalPinToPort（trigger_pin））;?//?Get?the?port?mode?register?for?the?trigger?pin.
#else
	_triggerPin?=?trigger_pin;
	_echoPin?=?echo_pin;
#endif

	set_max_distance（max_cm_distance）;?//?Call?function?to?set?the?max?sensor?distance.

#if?（defined?（__arm__）?&&?（defined?（TEENSYDUINO）?||?defined（PARTICLE）））?||?DO_BITWISE?!=?true
	pinMode（echo_pin?INPUT）;?????//?Set?echo?pin?to?input?（on?Teensy?3.x?（ARM）?pins?default?to?disabled?at?least?one?pinMode（）?is?needed?for?GPIO?mode）.
	pinMode（trigger_pin?OUTPUT）;?//?Set?trigger?pin?to?output?（on?Teensy?3.x?（ARM）?pins?default?to?disabled?at?least?one?pinMode（）?is?needed?for?GPIO?mode）.
#endif

#if?defined?（ARDUINO_AVR_YUN）
	pinMode（echo_pin?INPUT）;?????//?Set?echo?pin?to?input?for?the?Arduino?Yun?not?sure?why?it?doesn‘t?default?this?way.
#endif

#if?ONE_PIN_ENABLED?!=?true?&&?DO_BITWISE?==?true
	*_triggerMode?|=?_triggerBit;?//?Set?trigger?pin?to?output.
#endif
}


//?---------------------------------------------------------------------------
//?Standard?ping?methods
//?---------------------------------------------------------------------------

unsigned?int?NewPing::ping（unsigned?int?max_cm_distance）?{
	if?（max_cm_distance?>?0）?set_max_distance（max_cm_distance）;?//?Call?function?to?set?a?new?max?sensor?distance.

	if?（!ping_trigger（））?return?NO_ECHO;?//?Trigger?a?ping?if?it?returns?false?return?NO_ECHO?to?the?calling?function.

#if?URM37_ENABLED?==?true
	#if?DO_BITWISE?==?true
		while?（!（*_echoInput?&?_echoBit））?????????????//?Wait?for?the?ping?echo.
	#else
		while?（!digitalRead（_echoPin））????????????????//?Wait?for?the?ping?echo.
	#endif
			if?（micros（）?>?_max_time）?return?NO_ECHO;?//?Stop?the?loop?and?return?NO_ECHO?（false）?if?we‘re?beyond?the?set?maximum?distance.
#else
	#if?DO_BITWISE?==?true
		while?（*_echoInput?&?_echoBit）????????????????//?Wait?for?the?ping?echo

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-12-11?03:22??NewPing\
?????目錄???????????0??2016-08-04?06:00??NewPing\examples\
?????目錄???????????0??2016-08-04?05:55??NewPing\examples\NewPing15SensorsTimer\
?????文件????????4286??2017-12-11?02:48??NewPing\examples\NewPing15SensorsTimer\NewPing15SensorsTimer.pde
?????目錄???????????0??2016-08-04?05:55??NewPing\examples\NewPing3Sensors\
?????文件????????1066??2016-08-10?07:19??NewPing\examples\NewPing3Sensors\NewPing3Sensors.pde
?????目錄???????????0??2015-06-01?22:40??NewPing\examples\NewPingEventTimer\
?????文件????????2771??2012-08-29?13:11??NewPing\examples\NewPingEventTimer\NewPingEventTimer.pde
?????目錄???????????0??2015-06-01?22:40??NewPing\examples\NewPingExample\
?????文件????????1072??2012-08-29?13:10??NewPing\examples\NewPingExample\NewPingExample.pde
?????目錄???????????0??2016-08-04?05:55??NewPing\examples\NewPingTimerMedian\
?????文件????????3247??2016-08-05?09:42??NewPing\examples\NewPingTimerMedian\NewPingTimerMedian.pde
?????目錄???????????0??2015-06-01?22:40??NewPing\examples\TimerExample\
?????文件????????1248??2012-06-28?11:17??NewPing\examples\TimerExample\TimerExample.pde
?????文件?????????684??2017-12-11?02:29??NewPing\keywords.txt
?????文件?????????659??2018-07-16?01:44??NewPing\library.properties
?????文件?????????143??2017-12-11?03:26??NewPing\README.md
?????目錄???????????0??2017-12-11?02:23??NewPing\src\
?????文件???????17523??2017-12-11?02:09??NewPing\src\NewPing.cpp
?????文件???????15592??2018-07-16?01:44??NewPing\src\NewPing.h