Difference between revisions of "Unit HIDKEYBOARD"

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''To be documented''
 
  
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'''Initialization functions'''
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure HIDKeyboardInit;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Initialize the HID Keyboard unit and HID Keyboard driver</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| Called only during system startup
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|-
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|}
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</div></div>
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<br />
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'''HID keyboard functions'''
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function HIDKeyboardDeviceControl(Keyboard:PKeyboardDevice; Request:Integer; Argument1:LongWord; var Argument2:LongWord):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Implementation of KeyboardDeviceControl API for HID Keyboard</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| Not intended to be called directly by applications, use KeyboardDeviceControl instead.
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|-
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|}
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</div></div>
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<br />
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'''HID keyboard helper functions'''
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function HIDKeyboardCheckCollection(Collection:PHIDCollection):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if a HID collection is suitable for use as a keyboard device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| None documented
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function HIDKeyboardCheckInputDefinition(Definition:PHIDDefinition):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if a HID definition is suitable for use as a keyboard input report</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| None documented
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function HIDKeyboardCheckOutputDefinition(Definition:PHIDDefinition):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if a HID definition is suitable for use as a keyboard output (LED) report</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| None documented
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function HIDKeyboardCheckPressed(Keyboard:PHIDKeyboardDevice; ScanCode:Byte):Boolean;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if the passed scan code has been pressed (True if not pressed in last report</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Keyboard
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| The HID keyboard device to check for
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|-
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! ScanCode
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| The keyboard scan code to check
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|-
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! Note
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| Caller must hold the keyboard lock
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function HIDKeyboardCheckRepeated(Keyboard:PHIDKeyboardDevice; ScanCode:Byte):Boolean;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if the passed scan code was the last key pressed and if the repeat delay has expired</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Keyboard
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| The HID keyboard device to check for
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|-
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! ScanCode
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| The keyboard scan code to check
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|-
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! Note
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| Caller must hold the keyboard lock
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function HIDKeyboardCheckReleased(Keyboard:PHIDKeyboardDevice; Keys:PHIDKeyboardKeys; ScanCode:Byte):Boolean;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Check if the passed scan code has been released (True if not pressed in current report)</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Keyboard
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| The HID keyboard device to check for
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|-
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! Keys
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| The HID keyboard keys to compare against (Current)
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|-
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! ScanCode
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| The keyboard scan code to check
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|-
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! Note
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| Caller must hold the keyboard lock
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function HIDKeyboardDeviceSetLEDs(Keyboard:PHIDKeyboardDevice; LEDs:Byte):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Set the state of the LEDs for a HID keyboard device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Keyboard
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| The HID keyboard device to set the LEDs for
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|-
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! LEDs
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| The LED state to set (eg KEYBOARD_LED_NUMLOCK)
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|-
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! Return
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| ERROR_SUCCESS if completed or another error code on failure
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function HIDKeyboardDeviceSetIdle(Keyboard:PHIDKeyboardDevice; Duration,ReportId:Byte):LongWord;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Set the idle duration (Time between reports when no changes) for a HID keyboard device</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Keyboard
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| The HID keyboard device to set the idle duration for
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|-
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! Duration
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| The idle duration to set (Milliseconds divided by 4)
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|-
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! ReportId
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| The report Id to set the idle duration for (eg HID_REPORTID_NONE)
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|-
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! Return
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| ERROR_SUCCESS if completed or another error code on failure
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|-
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|}
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</div></div>
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<br />
  
 
Return to [[Unit_Reference|Unit Reference]]
 
Return to [[Unit_Reference|Unit Reference]]

Revision as of 23:58, 27 October 2022

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Description

Ultibo HID Keyboard Consumer unit

This is a consumer for any generic HID keyboard device, it accepts HID application collections in the generic desktop page (HID_PAGE_GENERIC_DESKTOP) with the usage set to keyboard (HID_DESKTOP_KEYBOARD).

The consumer will bind to any keyboard collection that includes at a minimum an input report containing a field that provides keypress data from the keyboard / keypad page (HID_PAGE_KEYBOARD_KEYPAD) and a field providing modifier keys from the same page.

The consumer will also look for an output report containing a field from the LED page (HID_PAGE_LED) and will use this to set the keyboard LEDs if found.

Up to 16 keypresses per report can be accepted (see HID_KEYBOARD_MAX_KEYS) but most keyboards will commonly report up to 6 which is the size defined in the USB HID usage tables for boot mode keyboard reports.

Constants


[Expand]
HID keyboard specific constants HID_KEYBOARD_*


Type definitions


HID keyboard keys

[Expand]

PHIDKeyboardKeys = ^THIDKeyboardKeys;

THIDKeyboardKeys = array[0..HID_KEYBOARD_MAX_KEYS - 1] of Byte;

HID keyboard device

[Expand]

PHIDKeyboardDevice = ^THIDKeyboardDevice;

THIDKeyboardDevice = record


Public variables

None defined

Function declarations


Initialization functions

[Expand] 
procedure HIDKeyboardInit;
Description: Initialize the HID Keyboard unit and HID Keyboard driver


HID keyboard functions

[Expand] 
function HIDKeyboardDeviceControl(Keyboard:PKeyboardDevice; Request:Integer; Argument1:LongWord; var Argument2:LongWord):LongWord;
Description: Implementation of KeyboardDeviceControl API for HID Keyboard


HID keyboard helper functions

[Expand] 
function HIDKeyboardCheckCollection(Collection:PHIDCollection):LongWord;
Description: Check if a HID collection is suitable for use as a keyboard device


[Expand] 
function HIDKeyboardCheckInputDefinition(Definition:PHIDDefinition):LongWord;
Description: Check if a HID definition is suitable for use as a keyboard input report


[Expand] 
function HIDKeyboardCheckOutputDefinition(Definition:PHIDDefinition):LongWord;
Description: Check if a HID definition is suitable for use as a keyboard output (LED) report


[Expand] 
function HIDKeyboardCheckPressed(Keyboard:PHIDKeyboardDevice; ScanCode:Byte):Boolean;
Description: Check if the passed scan code has been pressed (True if not pressed in last report


[Expand] 
function HIDKeyboardCheckRepeated(Keyboard:PHIDKeyboardDevice; ScanCode:Byte):Boolean;
Description: Check if the passed scan code was the last key pressed and if the repeat delay has expired


[Expand] 
function HIDKeyboardCheckReleased(Keyboard:PHIDKeyboardDevice; Keys:PHIDKeyboardKeys; ScanCode:Byte):Boolean;
Description: Check if the passed scan code has been released (True if not pressed in current report)


[Expand] 
function HIDKeyboardDeviceSetLEDs(Keyboard:PHIDKeyboardDevice; LEDs:Byte):LongWord;
Description: Set the state of the LEDs for a HID keyboard device


[Expand] 
function HIDKeyboardDeviceSetIdle(Keyboard:PHIDKeyboardDevice; Duration,ReportId:Byte):LongWord;
Description: Set the idle duration (Time between reports when no changes) for a HID keyboard device


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