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Description
EDT FocalTech FT5x06 I2C Touchscreen Driver unit
The EDT FocalTech FT5x06 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:
edt,edt-ft5206 (5 touch points)
edt,edt-ft5306 (5 touch points)
edt,edt-ft5406 (5 touch points)
edt,edt-ft5506 (10 touch points)
evervision,ev-ft5726 (10 touch points)
focaltech,ft6236 (2 touch points)
Constants
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FT5x06 specific constants FT5X06_TOUCH_*
FT5X06_TOUCH_DESCRIPTION = 'EDT FocalTech FT5x06 Touch Controller';
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Description of FT5x06 Touch device
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FT5x06 I2C clock rate FT5X06_I2C_*
FT5X06_I2C_RATE = 400000;
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Default I2C clock rate
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FT5x06 registers FT5X06_*_REGISTER_*
FT5X06_WORK_REGISTER_THRESHOLD = $00;
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FT5X06_WORK_REGISTER_REPORT_RATE = $08;
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FT5X06_WORK_REGISTER_GAIN = $30;
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FT5X06_WORK_REGISTER_OFFSET = $31;
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FT5X06_WORK_REGISTER_NUM_X = $33;
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FT5X06_WORK_REGISTER_NUM_Y = $34;
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FT5X06_PMOD_REGISTER_ACTIVE = $00;
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FT5X06_PMOD_REGISTER_HIBERNATE = $03;
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FT5X06_M09_REGISTER_THRESHOLD = $80;
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FT5X06_M09_REGISTER_GAIN = $92;
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FT5X06_M09_REGISTER_OFFSET = $93;
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FT5X06_M09_REGISTER_NUM_X = $94;
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FT5X06_M09_REGISTER_NUM_Y = $95;
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FT5X06_EV_REGISTER_THRESHOLD = $40;
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FT5X06_EV_REGISTER_GAIN = $41;
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FT5X06_EV_REGISTER_OFFSET_Y = $45;
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FT5X06_EV_REGISTER_OFFSET_X = $46;
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FT5X06_NO_REGISTER = $ff;
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FT5X06_WORK_REGISTER_OPMODE = $3c;
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FT5X06_FACTORY_REGISTER_OPMODE = $01;
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FT5X06_PMOD_REGISTER_OPMODE = $a5;
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FT5X06_TOUCH_EVENT_DOWN = $00;
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FT5X06_TOUCH_EVENT_UP = $01;
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FT5X06_TOUCH_EVENT_ON = $02;
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FT5X06_TOUCH_EVENT_RESERVED = $03;
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FT5X06_EDT_NAME_LEN = 23;
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FT5X06_EDT_SWITCH_MODE_RETRIES = 10;
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FT5X06_EDT_SWITCH_MODE_DELAY = 5;
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msec
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FT5X06_EDT_RAW_DATA_RETRIES = 100;
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FT5X06_EDT_RAW_DATA_DELAY = 1000;
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usec
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FT5X06_POLL_INTERVAL_MS = 17;
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17ms = 60fps
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FT5x06 version FT5X06_EDT_*
FT5X06_EDT_M06 = 0;
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FT5X06_EDT_M09 = 1;
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FT5X06_EDT_M12 = 2;
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FT5X06_EV_FT = 3;
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FT5X06_GENERIC_FT = 4;
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Type definitions
FT5x06 registers
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PFT5X06Registers = ^TFT5X06Registers;
TFT5X06Registers = record
Threshold:Byte;
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ReportRate:Byte;
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Gain:Byte;
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Offset:Byte;
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OffsetX:Byte;
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OffsetY:Byte;
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NumX:Byte;
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NumY:Byte;
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FT5x06 parameters
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PFT5X06Parameters = ^TFT5X06Parameters;
TFT5X06Parameters = record
Threshold:Byte;
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ReportRate:Byte;
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Gain:Byte;
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Offset:Byte;
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OffsetX:Byte;
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OffsetY:Byte;
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NumX:Byte;
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NumY:Byte;
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FT5x06 touch
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PFT5X06Touch = ^TFT5X06Touch;
TFT5X06Touch = record
| Touch Properties
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Touch:TTouchDevice;
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| I2C Properties
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I2C:PI2CDevice;
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The I2C device this device is connected to
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Address:Word;
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The I2C address of the device
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| General Properties
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IRQ:TGPIOInfo;
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The GPIO information for the IRQ line (Optional)
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RST:TGPIOInfo;
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The GPIO information for the Reset line (Optional)
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Timer:TTimerHandle;
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Handle for touch polling timer
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MaxX:Word;
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Maximum X value from current configuration
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MaxY:Word;
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Maximum Y value from current configuration
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Width:Word;
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Screen width value supplied during create
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Height:Word;
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Screen height value supplied during create
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MaxPoints:LongWord;
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Maximum touch points for this device
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LastPoints:LongWord;
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Points reported in last input report
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| FT5x06 Properties
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Version:LongWord;
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Version constant for this device (eg FT5X06_EDT_M06)
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ModelName:String;
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Model name string for this device
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FirmwareVersion:String;
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Firmware version string for this device
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Registers:TFT5X06Registers;
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Register addresses for this device
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Parameters:TFT5X06Parameters;
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Configuration parameters for this device
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SwapReportXY:Boolean;
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If True swap the X and Y values in the input report
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InvertReportX:Boolean;
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If True invert the X value in the input report
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InvertReportY:Boolean;
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If True invert the Y value in the input report
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Public variables
FT5x06 specific variables
FT5X06_SWAP_REPORT_XY:Boolean;
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FT5X06_INVERT_REPORT_X:Boolean;
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FT5X06_INVERT_REPORT_Y:Boolean;
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FT5X06_MAX_TOUCH_POINTS:LongWord = 2;
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Function declarations
Initialization functions
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procedure FT5X06Init;
Description: Initialize the FT5x06 Touch unit and parameters
| Note
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Called internally by other functions
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FT5x06 functions
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function FT5X06TouchCreate(I2C:PI2CDevice; Address:Word; Width,Height:LongWord; IRQ,RST:PGPIOInfo):PTouchDevice;
Description: Create, register and start a new FT5x06 Touch device connected to the specified I2C device
| I2C
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The I2C device this FT5x06 Touch device is connected to
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| Address
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The I2C address for this FT5x06 Touch device
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| Width
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The width of the screen in pixels (When set at TOUCH_ROTATION_0)
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| Height
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The height of the screen in pixels (When set at TOUCH_ROTATION_0)
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| IRQ
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The GPIO information for the IRQ line (Optional)
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| Return
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Pointer to the new Touch device or nil on failure
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function FT5X06TouchDestroy(Touch:PTouchDevice):LongWord;
Description: Stop, deregister and destroy a FT5x06 Touch device created by this driver
| Touch
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The Touch device to destroy
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| Return
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ERROR_SUCCESS if completed or another error code on failure
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FT5x06 touch functions
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function FT5X06TouchStart(Touch:PTouchDevice):LongWord;
Description: Implementation of TouchDeviceStart API for FT5x06 Touch device
| Note
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Not intended to be called directly by applications, use TouchDeviceStart instead.
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function FT5X06TouchStop(Touch:PTouchDevice):LongWord;
Description: Implementation of TouchDeviceStop API for FT5x06 Touch device
| Note
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Not intended to be called directly by applications, use TouchDeviceStop instead.
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function FT5X06TouchUpdate(Touch:PTouchDevice):LongWord;
Description: Implementation of TouchDeviceUpdate API for FT5x06 Touch device
| Note
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Not intended to be called directly by applications, use TouchDeviceUpdate instead.
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procedure FT5X06TouchTimer(Touch:PFT5X06Touch);
Description: Touch device timer event handler for FT5x06 Touch device
| Note
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Not intended to be called directly by applications
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procedure FT5X06TouchCallback(Touch:PFT5X06Touch; Pin,Trigger:LongWord);
Description: Touch device event callback (Interrupt) handler for FT5x06 Touch device
| Note
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Not intended to be called directly by applications
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