Python编程.Bluetooth HID Mouse and Keyboard（三）

调用SDP Helper接口非常简单，基本上跟Sample Code差不多，只不过代码换成了Python编程。

#!/usr/bin/env pythonimport ctypes,oshidd_report_desc = bytearray(    [0x05, 0x01,# UsagePage GenericDesktop0x09, 0x02,# Usage Mouse0xA1, 0x01,# Collection Application0x85, 0x01,# REPORT ID: 10x09, 0x01,# Usage Pointer0xA1, 0x00,# Collection Physical0x05, 0x09,# UsagePage Buttons0x19, 0x01,# UsageMinimum 10x29, 0x03,# UsageMaximum 30x15, 0x00,# LogicalMinimum 00x25, 0x01,# LogicalMaximum 10x75, 0x01,# ReportSize 10x95, 0x03,# ReportCount 30x81, 0x02,# **Input data variable absolute0x75, 0x05,# ReportSize 50x95, 0x01,# ReportCount 10x81, 0x01,# **InputConstant (padding)0x05, 0x01,# UsagePage GenericDesktop0x09, 0x30,# Usage X0x09, 0x31,# Usage Y0x09, 0x38,# Usage ScrollWheel0x15, 0x81,# LogicalMinimum -1270x25, 0x7F,# LogicalMaximum +1270x75, 0x08,# ReportSize 80x95, 0x02,# ReportCount 30x81, 0x06,# **Input data variable relative0xC0, 0xC0,# EndCollection EndCollection0x05, 0x01,# UsagePage GenericDesktop0x09, 0x06,# Usage Keyboard0xA1, 0x01,# Collection Application0x85, 0x02,# REPORT ID: 20xA1, 0x00,# Collection Physical0x05, 0x07,# UsagePage Keyboard0x19, 0xE0,# UsageMinimum 2240x29, 0xE7,# UsageMaximum 2310x15, 0x00,# LogicalMinimum 00x25, 0x01,# LogicalMaximum 10x75, 0x01,# ReportSize 10x95, 0x08,# ReportCount 80x81, 0x02,# **Input data variable absolute0x95, 0x08,# ReportCount 80x75, 0x08,# ReportSize 80x15, 0x00,# LogicalMinimum 00x25, 0x65,# LogicalMaximum 1010x05, 0x07,# UsagePage Keycodes0x19, 0x00,# UsageMinimum 00x29, 0x65,# UsageMaximum 1010x81, 0x00,# **Input DataArray0xC0, 0xC0,# EndCollection    ])class HiddInfo(ctypes.Structure):    _fields_ = (('service_name', ctypes.c_char_p),                ('description', ctypes.c_char_p),                ('provider', ctypes.c_char_p),                ('desc_data', ctypes.c_char_p),                ('desc_len', ctypes.c_uint),                ('sub_class', ctypes.c_uint))HiddInfoPtr = ctypes.POINTER(HiddInfo)class Sdp:    def __init__(self):        self.dll = ctypes.CDLL(os.path.abspath('libbthidd.so'))        return    def CreateRecord(self, handle=0xffffffff):        return self.dll.SdpCreateRecord(ctypes.c_uint(handle))    def DestroyRecord(self, record):        return self.dll.SdpDestroyRecord(ctypes.c_void_p(record))    def MakeUpHidRecord(self, record, info):        return self.dll.SdpMakeUpHidRecord(ctypes.c_void_p(record), HiddInfoPtr(info))    def RegisterRecord(self, record):        return self.dll.SdpRegisterRecord(ctypes.c_void_p(record))    def UnregisterRecord(self, record):        return self.dll.SdpUnregisterRecord(ctypes.c_void_p(record))    passdef main_entry():    info = HiddInfo()    info.service_name = 'My Virtual Mouse and Keyboard'    info.description = 'Bluetooth HID Mouse and Keyboard'    info.provider = 'Huipeng Zhao'    info.desc_data = str(hidd_report_desc)    info.desc_len = len(hidd_report_desc)    info.sub_class = 0x80        sdp = Sdp()    record = sdp.CreateRecord()    sdp.MakeUpHidRecord(record, info)    sdp.RegisterRecord(record)    sdp.DestroyRecord(record)    returnif __name__ == '__main__':    main_entry()    pass

Sdp类会在初始化函数中打开libbthidd.so动态库，因此Python脚本与libbthidd.so得放在同一个目录下。