HID 开发

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我是靠谱客的博主冷酷毛巾，最近开发中收集的这篇文章主要介绍HID 开发，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

藍牙HID

(1)Bluetooth HID devices支持：

Input(从发数据给主), Output（主发数据给从）, Feature（双向传输）。

(2)HID建立Control Channel和Interrupt Channel两个通道，

report可以在这两条channel上传输，

在Control channel上传输的report称为synchronous reports 同步在Interrupt channel上传输的report称为asynchronous reports 异步

(3)Feature 同步传输经常会使用 GET_REPORT或者SET_REPORT requests。

(4)Mode 模型分为：

Report Protocol Mode（报告模型）和Boot Protocol Mode（启动模型）。

主设备至少支持一种，从设备则需要支持Report Protocol Mode，并且Report Protocol Mode是Bluetooth HID Device的默认Mode。

（5）消息的⼤⼩不能超过L2CAP蓝⽛逻辑链路控制和适配协议的MTU
（6）BLE HID服务UUID为0x1812（标准规范），数据存放在报告中，通过下⾯的各个特征 characteristic 来收发 HID 的报告数据。

2.1 notify介绍
如果设备主动给手机发信息，则可以通过notification的方式，这种方式不用手机去轮询地读设备上的数据。notify的应用场景就是数据的实时上传。

2.2 notify实现
实现notify需要的api函数是gatt_notification，使用方法


// send notification
lastNoti.handle = pRpt->handle;
lastNoti.len = len;
osal_memcpy(lastNoti.value, pData, len);
GATT_Notification( gapConnHandle, &lastNoti, FALSE );

"feff": "GN Netcom",
"fefe": "GN ReSound A/S",
"fefd": "Gimbal, Inc.",
"fefc": "Gimbal, Inc.",
"fefb": "Stollmann E+V GmbH",
"fefa": "PayPal, Inc.",
"fef9": "PayPal, Inc.",
"fef8": "Aplix Corporation",
"fef7": "Aplix Corporation",
"fef6": "Wicentric, Inc.",
"fef5": "Dialog Semiconductor GmbH",
"fef4": "Google",
"fef3": "Google",
"fef2": "CSR",
"fef1": "CSR",
"fef0": "Intel",
"feef": "Polar Electro Oy",
"feee": "Polar Electro Oy",
"feed": "Tile, Inc.",
"feec": "Tile, Inc.",
"feeb": "Swirl Networks, Inc.",
"feea": "Swirl Networks, Inc.",
"fee9": "Quintic Corp.",
"fee8": "Quintic Corp.",
"fee7": "Tencent Holdings Limited",
"fee6": "Seed Labs, Inc.",
"fee5": "Nordic Semiconductor ASA",
"fee4": "Nordic Semiconductor ASA",
"fee3": "Anki, Inc.",
"fee2": "Anki, Inc.",
"fee1": "Anhui Huami Information Technology Co.",
"fee0": "Anhui Huami Information Technology Co.",
"fedf": "Design SHIFT",
"fede": "Coin, Inc.",
"fedd": "Jawbone",
"fedc": "Jawbone",
"fedb": "Perka, Inc.",
"feda": "ISSC Technologies Corporation",
"fed9": "Pebble Technology Corporation",
"fed8": "Google",
"fed7": "Broadcom Corporation",
"fed6": "Broadcom Corporation",
"fed5": "Plantronics Inc.",
"fed4": "Apple, Inc.",
"fed3": "Apple, Inc.",
"fed2": "Apple, Inc.",
"fed1": "Apple, Inc.",
"fed0": "Apple, Inc.",
"fecf": "Apple, Inc.",
"fece": "Apple, Inc.",
"fecd": "Apple, Inc.",
"fecc": "Apple, Inc.",
"fecb": "Apple, Inc.",
"feca": "Apple, Inc.",
"fec9": "Apple, Inc.",
"fec8": "Apple, Inc.",
"fec7": "Apple, Inc.",
"fec6": "Kocomojo, LLC",
"fec5": "Realtek Semiconductor Corp.",
"fec4": "PLUS Location Systems",
"fec3": "360fly, Inc.",
"fec2": "Blue Spark Technologies, Inc.",
"fec1": "KDDI Corporation",
"fec0": "KDDI Corporation",
"febf": "Nod, Inc.",
"febe": "Bose Corporation",
"febd": "Clover Network, Inc.",
"febc": "Dexcom, Inc.",
"febb": "adafruit industries",
"feba": "Tencent Holdings Limited",
"feb9": "LG Electronics",
"feb8": "Facebook, Inc.",
"feb7": "Facebook, Inc.",
"feb6": "Vencer Co, Ltd",
"feb5": "WiSilica Inc.",
"feb4": "WiSilica Inc.",
"feb3": "Taobao",
"feb2": "Microsoft Corporation",
"feb1": "Electronics Tomorrow Limited",
"feb0": "Nest Labs Inc.",
"feaf": "Nest Labs Inc.",
"feae": "Nokia Corporation",
"fead": "Nokia Corporation",
"feac": "Nokia Corporation",
"feab": "Nokia Corporation",
"feaa": "Google",
"fea9": "Savant Systems LLC",
"fea8": "Savant Systems LLC",
"fea7": "UTC Fire and Security",
"fea6": "GoPro, Inc.",
"fea5": "GoPro, Inc.",
"fea4": "Paxton Access Ltd",
"fea3": "ITT Industries",
"fea2": "Intrepid Control Systems, Inc.",
"fea1": "Intrepid Control Systems, Inc.",
"fea0": "Google",
"fe9f": "Google",
"fe9e": "Dialog Semiconductor B.V.",
"fe9d": "Mobiquity Networks Inc",
"fe9c": "GSI Laboratories, Inc.",
"fe9b": "Samsara Networks, Inc",
"fe9a": "Estimote",
"fe99": "Currant, Inc.",
"fe98": "Currant, Inc.",
"fe97": "Tesla Motor Inc.",
"fe96": "Tesla Motor Inc.",
"fe95": "Xiaomi Inc.",
"fe94": "OttoQ Inc.",
"fe93": "OttoQ Inc.",
"fe92": "Jarden Safety & Security",
"fe91": "Shanghai Imilab Technology Co.,Ltd",
"fe90": "JUMA",
"fe8f": "CSR",
"fe8e": "ARM Ltd",
"fe8d": "Interaxon Inc.",
"fe8c": "TRON Forum",
"fe8b": "Apple, Inc.",
"fe8a": "Apple, Inc.",
"fe89": "B&O Play A/S",
"fe88": "SALTO SYSTEMS S.L.",
"fe87": "Qingdao Yeelink Information Technology Co., Ltd. ",
"fe86": "HUAWEI Technologies Co., Ltd. ",
"fe85": "RF Digital Corp",
"fe84": "RF Digital Corp",
"fe83": "Blue Bite",
"fe82": "Medtronic Inc.",
"fe81": "Medtronic Inc.",
"fe80": "Doppler Lab",
"fe7f": "Doppler Lab",
"fe7e": "Awear Solutions Ltd",
"fe7d": "Aterica Health Inc.",
"fe7c": "Stollmann E+V GmbH",
"fe7b": "Orion Labs, Inc.",
"fffe": "Alliance for Wireless Power (A4WP)",
"fffd": "Fast IDentity Online Alliance (FIDO)"