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Diffstat (limited to 'examples/scanwin32.py')
| -rw-r--r-- | examples/scanwin32.py | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/examples/scanwin32.py b/examples/scanwin32.py new file mode 100644 index 0000000..2d3249d --- /dev/null +++ b/examples/scanwin32.py @@ -0,0 +1,232 @@ +import ctypes +import re + +def ValidHandle(value): + if value == 0: + raise ctypes.WinError() + return value + +NULL = 0 +HDEVINFO = ctypes.c_int +BOOL = ctypes.c_int +CHAR = ctypes.c_char +PCTSTR = ctypes.c_char_p +HWND = ctypes.c_uint +DWORD = ctypes.c_ulong +PDWORD = ctypes.POINTER(DWORD) +ULONG = ctypes.c_ulong +ULONG_PTR = ctypes.POINTER(ULONG) +#~ PBYTE = ctypes.c_char_p +PBYTE = ctypes.c_void_p + +class GUID(ctypes.Structure): + _fields_ = [ + ('Data1', ctypes.c_ulong), + ('Data2', ctypes.c_ushort), + ('Data3', ctypes.c_ushort), + ('Data4', ctypes.c_ubyte*8), + ] + def __str__(self): + return "{%08x-%04x-%04x-%s-%s}" % ( + self.Data1, + self.Data2, + self.Data3, + ''.join(["%02x" % d for d in self.Data4[:2]]), + ''.join(["%02x" % d for d in self.Data4[2:]]), + ) + +class SP_DEVINFO_DATA(ctypes.Structure): + _fields_ = [ + ('cbSize', DWORD), + ('ClassGuid', GUID), + ('DevInst', DWORD), + ('Reserved', ULONG_PTR), + ] + def __str__(self): + return "ClassGuid:%s DevInst:%s" % (self.ClassGuid, self.DevInst) +PSP_DEVINFO_DATA = ctypes.POINTER(SP_DEVINFO_DATA) + +class SP_DEVICE_INTERFACE_DATA(ctypes.Structure): + _fields_ = [ + ('cbSize', DWORD), + ('InterfaceClassGuid', GUID), + ('Flags', DWORD), + ('Reserved', ULONG_PTR), + ] + def __str__(self): + return "InterfaceClassGuid:%s Flags:%s" % (self.InterfaceClassGuid, self.Flags) + +PSP_DEVICE_INTERFACE_DATA = ctypes.POINTER(SP_DEVICE_INTERFACE_DATA) + +PSP_DEVICE_INTERFACE_DETAIL_DATA = ctypes.c_void_p + +class dummy(ctypes.Structure): + _fields_=[("d1", DWORD), ("d2", CHAR)] + _pack_ = 1 +SIZEOF_SP_DEVICE_INTERFACE_DETAIL_DATA_A = ctypes.sizeof(dummy) + +SetupDiDestroyDeviceInfoList = ctypes.windll.setupapi.SetupDiDestroyDeviceInfoList +SetupDiDestroyDeviceInfoList.argtypes = [HDEVINFO] +SetupDiDestroyDeviceInfoList.restype = BOOL + +SetupDiGetClassDevs = ctypes.windll.setupapi.SetupDiGetClassDevsA +SetupDiGetClassDevs.argtypes = [ctypes.POINTER(GUID), PCTSTR, HWND, DWORD] +SetupDiGetClassDevs.restype = ValidHandle # HDEVINFO + +SetupDiEnumDeviceInterfaces = ctypes.windll.setupapi.SetupDiEnumDeviceInterfaces +SetupDiEnumDeviceInterfaces.argtypes = [HDEVINFO, PSP_DEVINFO_DATA, ctypes.POINTER(GUID), DWORD, PSP_DEVICE_INTERFACE_DATA] +SetupDiEnumDeviceInterfaces.restype = BOOL + +SetupDiGetDeviceInterfaceDetail = ctypes.windll.setupapi.SetupDiGetDeviceInterfaceDetailA +SetupDiGetDeviceInterfaceDetail.argtypes = [HDEVINFO, PSP_DEVICE_INTERFACE_DATA, PSP_DEVICE_INTERFACE_DETAIL_DATA, DWORD, PDWORD, PSP_DEVINFO_DATA] +SetupDiGetDeviceInterfaceDetail.restype = BOOL + +SetupDiGetDeviceRegistryProperty = ctypes.windll.setupapi.SetupDiGetDeviceRegistryPropertyA +SetupDiGetDeviceRegistryProperty.argtypes = [HDEVINFO, PSP_DEVINFO_DATA, DWORD, PDWORD, PBYTE, DWORD, PDWORD] +SetupDiGetDeviceRegistryProperty.restype = BOOL + + +GUID_CLASS_COMPORT = GUID(0x86e0d1e0L, 0x8089, 0x11d0, + (ctypes.c_ubyte*8)(0x9c, 0xe4, 0x08, 0x00, 0x3e, 0x30, 0x1f, 0x73)) + +DIGCF_PRESENT = 2 +DIGCF_DEVICEINTERFACE = 16 +INVALID_HANDLE_VALUE = 0 +ERROR_INSUFFICIENT_BUFFER = 122 +SPDRP_HARDWAREID = 1 +SPDRP_FRIENDLYNAME = 12 +SPDRP_LOCATION_INFORMATION = 13 +ERROR_NO_MORE_ITEMS = 259 + +def comports(available_only=True): + """This generator scans the device registry for com ports and yields + (order, port, desc, hwid). If available_only is true only return currently + existing ports. Order is a helper to get sorted lists. it can be ignored + otherwise.""" + flags = DIGCF_DEVICEINTERFACE + if available_only: + flags |= DIGCF_PRESENT + g_hdi = SetupDiGetClassDevs(ctypes.byref(GUID_CLASS_COMPORT), None, NULL, flags); + #~ for i in range(256): + for dwIndex in range(256): + did = SP_DEVICE_INTERFACE_DATA() + did.cbSize = ctypes.sizeof(did) + + if not SetupDiEnumDeviceInterfaces( + g_hdi, + None, + ctypes.byref(GUID_CLASS_COMPORT), + dwIndex, + ctypes.byref(did) + ): + if ctypes.GetLastError() != ERROR_NO_MORE_ITEMS: + raise ctypes.WinError() + break + + dwNeeded = DWORD() + # get the size + if not SetupDiGetDeviceInterfaceDetail( + g_hdi, + ctypes.byref(did), + None, 0, ctypes.byref(dwNeeded), + None + ): + # Ignore ERROR_INSUFFICIENT_BUFFER + if ctypes.GetLastError() != ERROR_INSUFFICIENT_BUFFER: + raise ctypes.WinError() + # allocate buffer + class SP_DEVICE_INTERFACE_DETAIL_DATA_A(ctypes.Structure): + _fields_ = [ + ('cbSize', DWORD), + ('DevicePath', CHAR*(dwNeeded.value - ctypes.sizeof(DWORD))), + ] + def __str__(self): + return "DevicePath:%s" % (self.DevicePath,) + idd = SP_DEVICE_INTERFACE_DETAIL_DATA_A() + idd.cbSize = SIZEOF_SP_DEVICE_INTERFACE_DETAIL_DATA_A + devinfo = SP_DEVINFO_DATA() + devinfo.cbSize = ctypes.sizeof(devinfo) + if not SetupDiGetDeviceInterfaceDetail( + g_hdi, + ctypes.byref(did), + ctypes.byref(idd), dwNeeded, None, + ctypes.byref(devinfo) + ): + raise ctypes.WinError() + + # hardware ID + szHardwareID = ctypes.create_string_buffer(250) + if not SetupDiGetDeviceRegistryProperty( + g_hdi, + ctypes.byref(devinfo), + SPDRP_HARDWAREID, + None, + ctypes.byref(szHardwareID), ctypes.sizeof(szHardwareID) - 1, + None + ): + # Ignore ERROR_INSUFFICIENT_BUFFER + if ctypes.GetLastError() != ERROR_INSUFFICIENT_BUFFER: + raise ctypes.WinError() + + # friendly name + szFriendlyName = ctypes.create_string_buffer(1024) + if not SetupDiGetDeviceRegistryProperty( + g_hdi, + ctypes.byref(devinfo), + SPDRP_FRIENDLYNAME, + None, + ctypes.byref(szFriendlyName), ctypes.sizeof(szFriendlyName) - 1, + None + ): + # Ignore ERROR_INSUFFICIENT_BUFFER + if ctypes.GetLastError() != ERROR_INSUFFICIENT_BUFFER: + #~ raise ctypes.WinError() + # not getting friendly name for com0com devices, try something else + szFriendlyName = ctypes.create_string_buffer(1024) + if SetupDiGetDeviceRegistryProperty( + g_hdi, + ctypes.byref(devinfo), + SPDRP_LOCATION_INFORMATION, + None, + ctypes.byref(szFriendlyName), ctypes.sizeof(szFriendlyName) - 1, + None + ): + port_name = "\\\\.\\" + szFriendlyName.value + order = None + else: + port_name = szFriendlyName.value + order = None + else: + try: + m = re.search(r"\((.*?(\d+))\)", szFriendlyName.value) + #~ print szFriendlyName.value, m.groups() + port_name = m.group(1) + order = int(m.group(2)) + except AttributeError, msg: + port_name = szFriendlyName.value + order = None + yield order, port_name, szFriendlyName.value, szHardwareID.value + + SetupDiDestroyDeviceInfoList(g_hdi) + + +if __name__ == '__main__': + import serial + print "-"*78 + print "Serial ports" + print "-"*78 + for order, port, desc, hwid in sorted(comports()): + print "%-10s: %s (%s) ->" % (port, desc, hwid), + try: + serial.Serial(port) # test open + except serial.serialutil.SerialException: + print "can't be openend" + else: + print "Ready" + print + # list of all ports the system knows + print "-"*78 + print "All serial ports (registry)" + print "-"*78 + for order, port, desc, hwid in sorted(comports(False)): + print "%-10s: %s (%s)" % (port, desc, hwid) |