Unit GoodixTouch

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Description

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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

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To be documented

Type definitions

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To be documented

Public variables

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To be documented

Function declarations

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Initialization functions

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procedure GOODIXInit;

Description: Initialize the Goodix Touch unit and parameters

Note	Called internally by other functions

Goodix functions

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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

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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

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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.

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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.

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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.

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procedure GOODIXTouchTimer(Touch:PGOODIXTouch);

Description: Touch device timer event handler for Goodix Touch device

Note	Not intended to be called directly by applications

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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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