BLEHIDDevice Class

BLEHIDDevice Class

Description

A class used for creating and managing HID over GATT Profile (HOGP) services.

Syntax
class BLEHIDDevice

Members

Public Constructors
The public constructor should not be used as this class is intended to be a singleton class. Access member functions using the object instance named BLEHIDDev.
Public Methods 
BLEHIDDevice::initInitialize the HID Device Profile by creating the required services and characteristics.
BLEHIDDevice::setNumOutputReportSet the number of HID output reports to be generated.
BLEHIDDevice::setNumInputReportSet the number of HID input reports to be generated.
BLEHIDDevice::setReportMapSet the HID report map characteristics with a HID report descriptor.
BLEHIDDevice::inputReportSend a HID input report to connected device.
BLEHIDDevice::setOutputReportCallbackSet a user callback function for receiving HID output reports.
BLEHIDDevice::bootKeyboardReportSend a HID boot keyboard input report to connected device.
BLEHIDDevice::setHidInfoSet HID info of the HID service.
BLEHIDDevice::setBattLevelSet battery level info of the Battery service.
BLEHIDDevice::setPNPInfoSet PNP information of the Device Information service.
BLEHIDDevice::setManufacturerStringSet manufacturer information of the Device Information service.
BLEHIDDevice::setModelStringSet model information of the Device Information service.
BLEHIDDevice::hidServiceGet reference to HID service.
BLEHIDDevice::devInfoServiceGet reference to Device Information service.
BLEHIDDevice::battServiceGet reference to Battery service.

BLEHIDDevice::init

Description
Initialize the HID Device profile by creating the required services and characteristics.

Syntax
void init(void);

Parameters
NA

Returns
NA

Notes and Warnings
The HID Device object should be initialized before any HID reports can be sent.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::setNumOutputReport

Description
Set the number of HID output reports to be generated.

Syntax
void setNumOutputReport (uint8_t numOutputReports);

Parameters
numOutputReports: number of output reports.

Returns
NA

Example Code
NA

Notes and Warnings
The number of output reports should be set before BLEHIDDevice init() function is called.The default number of HID output report to be generated is 1 if it is not set.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::setNumInputReport

Description
Set the number of HID input reports to be generated.

Syntax
void setNumInputReport (uint8_t numInputReports);

Parameters
numInputReports: number of input reports.

Returns
NA

Example Code
NA

Notes and Warnings
The number of input reports should be set before BLEHIDDevice init() function is called.The default number of HID input report to be generated is 3 if it is not set.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::setReportMap

Description
Set the HID report map characteristics with a HID report descriptor.

Syntax
void setReportMap (uint8_t* report_map, uint16_t len);

Parameters
report_map: pointer to HID report descriptor.
len: HID report descriptor length in bytes.

Returns
NA

Notes and Warnings
The HID report map characteristic can only be configured after BLEHIDDevice init() function is called.
HID report descriptor is a hard coded array of bytes that describe the device’s data packets. For example, how many packets the device supports, how large are the packets and the purpose of each byte and bits in the packets.
For more information on HID report descriptor, refer to (https://eleccelerator.com/tutorial-about-usb-hid-report-descriptors/).
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::inputReport

Description
Send a HID input report to connected device.

Syntax
void inputReport (uint8_t reportID, uint8_t* data, uint16_t len, uint8_t conn_id);

Parameters
reportID: HID report ID of input report.
data: pointer to the HID input report data to be sent .
len: length of HID input report data in bytes.
conn_id: connection ID of device that the HID report will be sent to.

Returns
NA

Example Code
NA

Notes and Warnings
HID input reports can only be sent after BLEHIDDevice init() function has been called.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::setOutputReportCallback

Description
Set a user callback function for receiving HID output report data.

Syntax
void setOutputReportCallback (uint8_t reportID, void (*fCallback) (BLECharacteristic* chr, uint8_t conn_id));

Parameters
reportID: HID report ID of output report.

Returns
NA

Example Code
NA

Notes and Warnings
Setting a user callback function for output reports can only occur after BLEHIDDevice init() function has been called.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::bootKeyboardReport

Description
Send a HID boot keyboard input report to connected device.

Syntax
void bootKeyboardReport (uint8_t* data, uint16_t len, uint8_t conn_id);

Parameters
data: pointer to the HID input report data to be sent.
len: length of HID input report data in bytes.
conn_id: connection ID of device that the HID input report will be sent to.

Returns
NA

Example Code
NA

Notes and Warnings
By default, the HID service Protocol Mode characteristic has boot mode disabled. To send boot keyboard input reports, the Protocol Mode characteristic needs to have boot mode enabled.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::setHidInfo

Description
Set HID information such as HID class specification version, country code and flags for HID service.

Syntax
void setHidInfo (uint16_t bcd, uint8_t country, uint8_t flags);

Parameters
bcd: 16-bit unsigned integer representing version number of base USB HID Specification implemented by HID Device
country: 8-bit integer identifying country HID Device hardware is localized for. Most hardware is not localized (value 0x00).
flags: Bit flags indicating remote-wake capability and advertising when bonded but not connected.

Returns
NA

Example Code
NA

Notes and Warnings
For detailed information on the characteristic, refer to Bluetooth SIG HID Service specifications.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::setBattLevel

Description
Set battery level data of the Battery service.

Syntax
void setBattLevel (uint8_t level);

Parameters
level: battery level expressed as % of full charge

Returns
NA

Example Code
NA

Notes and Warnings
Battery level is set to 100% by default. For detailed information refer to Bluetooth SIG Battery service specifications.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::setPNPInfo

Description
Set PNP data of the Device Information service.

Syntax
void setPNPInfo (uint8_t sig, uint16_t vid, uint16_t pid, uint16_t version);

Parameters
sig: The Vendor ID Source field designates which organization assigned the value used in the Vendor ID field value.
vid: The Vendor ID field is intended to uniquely identify the vendor of the device.
pid: The Product ID field is intended to distinguish between different products made by the vendor.
version: The Product Version field is a numeric expression identifying the device release number in Binary-Coded Decimal.

Returns
NA

Example Code
NA

Notes and Warnings
By default, sig and vid are configured to indicate Realtek as the vendor. For detailed information refer to Bluetooth SIG Device Information service specifications.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::setManufacturerString

Description
Set manufacturer information of the Device Information service.

Syntax
void setManufacturerString (const char* manufacturer);

Parameters
manufacturer: pointer to character string containing manufacturer name.

Returns
NA

Example Code
NA

Notes and Warnings
Manufacturer is set to “Realtek” by default. For detailed information refer to Bluetooth SIG Device Information service specifications.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::setModelString

Description
Set model information of the Device Information service.

Syntax
void setModelString (const char* model);

Parameters
model: pointer to character string containing device model info.

Returns
NA

Example Code
NA

Notes and Warnings
Model is set to “Ameba_BLE_HID” by default. For detailed information refer to Bluetooth SIG Device Information service specifications.
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::hidService

Description
Get reference to HID service.

Syntax
BLEService& hidService(void);

Parameters
NA

Returns
This function returns a pointer to the BLEService class object for the HID service.

Notes and Warnings
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::devInfoService

Description
Get reference to Device Information service.

Syntax
BLEService& devInfoService(void);

Parameters
NA

Returns
This function returns a pointer to the BLEService class object for the Device Information service.

Notes and Warnings
“BLEHIDDevice.h” must be included to use the class function.

BLEHIDDevice::battService

Description
Get reference to Battery service.

Syntax
BLEService& battService(void);

Parameters
NA

Returns
This function returns a pointer to the BLEService class object for the Battery service.

Notes and Warnings
“BLEHIDDevice.h” must be included to use the class function.

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