SerialPort Class Reference

#include <SerialPort.h>

Inheritance diagram for SerialPort:

Static Public Member Functions
static bool	access (const String &_path)
Static Public Member Functions inherited from File
static File *	openTempFile (const String &_dirname, const String &_prefix, unsigned int _mode=0666) __DCL_THROWS1(IOException *)

Protected Member Functions
virtual bool	onEvent (short _revents, PollThread *_pPollThread) __DCL_THROWS1(IOException *)
Protected Member Functions inherited from File
	File ()
	File (HandleType _handle, const String &_path)
Protected Member Functions inherited from Object
virtual	~Object ()
	Object ()

Additional Inherited Members
Public Types inherited from File
enum	Whence { BEGIN , CURRENT , END }
Public Member Functions inherited from File
virtual String	toString () const
virtual	~File ()
	File (const String &_path, int _oflags=READONLY, int _mode=0666) __DCL_THROWS1(IOException *)
void	open (const String &_path, int _oflags=READONLY, int _mode=0666) __DCL_THROWS1(IOException *)
	File (HandleType _handle, int _ohints, bool _closeOnClose) __DCL_THROWS1(IOException *)
void	open (HandleType _handle, int _ohints, bool _closeOnClose) __DCL_THROWS1(IOException *)
virtual void	sync () __DCL_THROWS1(IOException *)
virtual void	close () __DCL_THROWS1(IOException *)
virtual size_t	available () const __DCL_THROWS1(IOException *)
virtual size_t	read (void *_buf, size_t _n) __DCL_THROWS1(IOException *)
virtual size_t	write (const void *_buf, size_t _n) __DCL_THROWS1(IOException *)
off_t	seek (off_t _offset, int _whence) __DCL_THROWS1(IOException *)
off_t	size () const __DCL_THROWS1(IOException *)
DateTime	mtime () const __DCL_THROWS1(IOException *)
bool	time (time_t *_atime, time_t *_mtime, time_t *_ctime) const
HandleType	handle () const
const String &	path () const
Public Member Functions inherited from Object
virtual void	destroy ()
String	className () const
bool	isInstanceOf (const std::type_info &typeinfo) const
virtual const std::type_info &	typeInfo () const
Protected Attributes inherited from File
String	__path
HandleType	__handle
bool	__closeOnClose

Detailed Description

직렬포트 관련 장치파일을 구성하고 접근한다.

직렬포트에 대한 파일명은 UNIX에서 /dev/tty#N, /dev/ttyS#N, /dev/ttyUSB#N 과 같은 것들이고, Windows에서는 COM#N 등 이다.

Linux에서 직렬포트는 프로세스가 uucp그룹에 포함되어 있지 않으면 접근이 거부되므로 확인한다.

이 클래스는 직렬포트의 Non-Blocking 입출력에 대하여 준비되어 있다. 자세한 사용방법은 SerialPollThread를 참고한다.

USB-Serial 장치를 사용하는 경우 실행시간에 포트가 제거될 수 있다. UNIX의 경우 onEvent(Events _events, SerialPollThread* _pWatcher)의 _events에 POLLHUP가 전달 되고, Windows의 경우 File::read(void* _buf, size_t _n), File::write(const void* _buf, size_t n)의 호출 과정에서 예외를 처리해야 한다. Windows 에러코드는 ERROR_ACCESS_DENIED (5)이다.

See also

PollAble

SerialPollThread

Definition at line 51 of file SerialPort.h.

Member Function Documentation

access()

bool SerialPort::access ( const String & _path )

static

주어진 경로의 가능 여부를 확인한다.

UNIX에서는 access(R_OK | W_OK)로 확인하고, Windows에서는 경로를 열어보고 그 결과를 반환한다.

Definition at line 246 of file SerialPort.cpp.

{
#ifdef __WINNT__
    SECURITY_ATTRIBUTES securityAttributes = { sizeof(SECURITY_ATTRIBUTES), NULL, TRUE };
    HANDLE handle = CreateFileW(
        _path,                          // __in     LPCTSTR lpFileName,
        GENERIC_READ | GENERIC_WRITE,   // __in     DWORD dwDesiredAccess,
        0,                              // __in     DWORD dwShareMode,
        &securityAttributes,            // __in     LPSECURITY_ATTRIBUTES lpSecurityAttributes,
        OPEN_EXISTING,                  // __in     DWORD dwCreationDisposition,
        0,                              // __in     DWORD dwFlagsAndAttributes,
        NULL                            // __in     HANDLE hTemplateFile
        );
    if (handle != INVALID_HANDLE_VALUE) {
        CloseHandle(handle);
        return true;
    }
    return false;
 
#else
    return  __access(_path, R_OK | W_OK);
 
#endif
}

onEvent()

bool SerialPort::onEvent ( short _revents, PollThread * _pPollThread )

protectedvirtual

SerialPollThread에의해 감시되다가 이벤트가 발생되었을 때 호출된다.

Implements PollAble.

Definition at line 271 of file SerialPort.cpp.

{
    return true;
}

---

The documentation for this class was generated from the following files:

• SerialPort.h
• SerialPort.cpp