Difference between revisions of "Unit GoodixTouch"

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''To be documented''
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'''Goodix touch'''
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
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<code>PGOODIXTouch = ^TGOODIXTouch;</code>
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<code>TGOODIXTouch = record</code>
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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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|colspan="2"|''Touch Properties''
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|-
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| <code>Touch:TTouchDevice;</code>
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| style="width: 50%;"|&nbsp;
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|-
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|colspan="2"|''I2C Properties''
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|-
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| <code>I2C:PI2CDevice;</code>
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| The I2C device this device is connected to
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|-
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| <code>Address:Word;</code>
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| The I2C address of the device
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|-
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|colspan="2"|''General Properties''
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|-
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| <code>IRQ:TGPIOInfo;</code>
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| The GPIO information for the IRQ line (Optional)
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|-
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| <code>RST:TGPIOInfo;</code>
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| The GPIO information for the Reset line (Optional)
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|-
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| <code>Timer:TTimerHandle;</code>
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| Handle for touch release timer
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|-
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| <code>MaxX:Word;</code>
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| Maximum X value from current configuration
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|-
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| <code>MaxY:Word;</code>
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| Maximum Y value from current configuration
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|-
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| <code>Width:Word;</code>
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| Screen width value supplied during create
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|-
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| <code>Height:Word;</code>
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| Screen height value supplied during create
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|-
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| <code>MaxPoints:LongWord;</code>
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| Maximum touch points from current configuration
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|-
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| <code>LastPoints:LongWord;</code>
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| Points reported in last input report
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|-
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|colspan="2"|''Goodix Properties''
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|-
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| <code>Id:String;</code>
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| ID String for this device
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|-
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| <code>Version:Word;</code>
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| Version number for this device
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|-
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| <code>ConfigAddress:Word;</code>
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| Configuration data address
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|-
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| <code>ConfigLength:LongWord;</code>
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| Configuration data length in bytes
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|-
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| <code>ChecksumSize:LongWord;</code>
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| Configuration checksum size
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|-
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| <code>ContactSize:LongWord;</code>
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| Size of each contact point coordinate in touch data
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|-
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| <code>Configuration:array[0..GOODIX_CONFIG_MAX_LENGTH - 1] of Byte;</code>
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| &nbsp;
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|-
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| <code>KeyCodes:array[0..GOODIX_MAX_KEYS - 1] of Word;</code>
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| &nbsp;
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|-
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| <code>ScanCodes:array[0..GOODIX_MAX_KEYS - 1] of Word;</code>
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| &nbsp;
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|-
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| <code>SwapConfigXY:Boolean;</code>
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| If True swap the max X and Y values in the configuration
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|-
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| <code>SwapReportXY:Boolean;</code>
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| If True swap the X and Y values in the input report}
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|-
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| <code>InvertReportX:Boolean;</code>
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| If True invert the X value in the input report
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|-
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| <code>InvertReportY:Boolean;</code>
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| If True invert the Y value in the input report
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|-
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| <code>ConfigFilename:String;</code>
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| The configuration filename to load during initialization
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|-
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| <code>ResetController:Boolean;</code>
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| If True reset the controller during initialization
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|-
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|}
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</div></div>
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'''GOODIX point data'''
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{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
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|-
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| <code>TGOODIXPointData = array[0..(2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS) - 1] of Byte;</code>
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| style="width: 40%;"|
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|-
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|}
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<br />
  
 
=== Public variables ===
 
=== Public variables ===

Revision as of 01:11, 5 August 2022

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Description

Goodix I2C Touchscreen Driver unit

The GOODIX I2C controllers are a range of capacitive touchscreen controllers that include multipoint touch support and are used by a variety of small LCD displays. The exact features and capability of each device can be found by checking the datasheets which can be obtained online.

This driver is compatible with the following devices: 

 goodix,gt1151
 goodix,gt5663
 goodix,gt5688
 goodix,gt911
 goodix,gt9110
 goodix,gt912
 goodix,gt9147
 goodix,gt917s
 goodix,gt927
 goodix,gt9271
 goodix,gt928
 goodix,gt9286
 goodix,gt967

Constants

To be documented

Type definitions


Goodix touch

PGOODIXTouch = ^TGOODIXTouch;

TGOODIXTouch = record

Touch Properties
Touch:TTouchDevice;  
I2C Properties
I2C:PI2CDevice; The I2C device this device is connected to
Address:Word; The I2C address of the device
General Properties
IRQ:TGPIOInfo; The GPIO information for the IRQ line (Optional)
RST:TGPIOInfo; The GPIO information for the Reset line (Optional)
Timer:TTimerHandle; Handle for touch release timer
MaxX:Word; Maximum X value from current configuration
MaxY:Word; Maximum Y value from current configuration
Width:Word; Screen width value supplied during create
Height:Word; Screen height value supplied during create
MaxPoints:LongWord; Maximum touch points from current configuration
LastPoints:LongWord; Points reported in last input report
Goodix Properties
Id:String; ID String for this device
Version:Word; Version number for this device
ConfigAddress:Word; Configuration data address
ConfigLength:LongWord; Configuration data length in bytes
ChecksumSize:LongWord; Configuration checksum size
ContactSize:LongWord; Size of each contact point coordinate in touch data
Configuration:array[0..GOODIX_CONFIG_MAX_LENGTH - 1] of Byte;  
KeyCodes:array[0..GOODIX_MAX_KEYS - 1] of Word;  
ScanCodes:array[0..GOODIX_MAX_KEYS - 1] of Word;  
SwapConfigXY:Boolean; If True swap the max X and Y values in the configuration
SwapReportXY:Boolean; If True swap the X and Y values in the input report}
InvertReportX:Boolean; If True invert the X value in the input report
InvertReportY:Boolean; If True invert the Y value in the input report
ConfigFilename:String; The configuration filename to load during initialization
ResetController:Boolean; If True reset the controller during initialization

GOODIX point data

TGOODIXPointData = array[0..(2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS) - 1] of Byte;


Public variables

To be documented

Function declarations


Initialization functions 

procedure GOODIXInit;
Description: Initialize the Goodix Touch unit and parameters
Note Called internally by other functions


Goodix functions 

function GOODIXTouchCreate(I2C:PI2CDevice; Address:Word; Width,Height:LongWord; IRQ,RST:PGPIOInfo):PTouchDevice;
Description: Create, register and start a new Goodix Touch device connected to the specified I2C device
I2C The I2C device this Goodix Touch device is connected to
Address The I2C address for this Goodix Touch device
Width The width of the screen in pixels (When set at TOUCH_ROTATION_0)
Height The height of the screen in pixels (When set at TOUCH_ROTATION_0)
IRQ The GPIO information for the IRQ line (Optional)
Return Pointer to the new Touch device or nil on failure 


function GOODIXTouchDestroy(Touch:PTouchDevice):LongWord;
Description: Stop, deregister and destroy a Goodix Touch device created by this driver
Touch The Touch device to destroy
Return ERROR_SUCCESS if completed or another error code on failure


Goodix touch functions 

function GOODIXTouchStart(Touch:PTouchDevice):LongWord;
Description: Implementation of TouchDeviceStart API for Goodix Touch device
Note Not intended to be called directly by applications, use TouchDeviceStart instead. 


function GOODIXTouchStop(Touch:PTouchDevice):LongWord;
Description: Implementation of TouchDeviceStop API for Goodix Touch device
Note Not intended to be called directly by applications, use TouchDeviceStop instead. 


function GOODIXTouchUpdate(Touch:PTouchDevice):LongWord;
Description: Implementation of TouchDeviceUpdate API for Goodix Touch device
Note Not intended to be called directly by applications, use TouchDeviceUpdate instead. 


procedure GOODIXTouchTimer(Touch:PGOODIXTouch);
Description: Touch device timer event handler for Goodix Touch device
Note Not intended to be called directly by applications 


procedure GOODIXTouchCallback(Touch:PGOODIXTouch; Pin,Trigger:LongWord);
Description: Touch device event callback (Interrupt) handler for Goodix Touch device
Note Not intended to be called directly by applications


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