Touch (Focaltech)
- Albinleo Velappan (Deactivated)
- Anu Selvaraj (Deactivated)
This describes the touch-driver for the Focaltech capacitive touch found on the iPAN5/iPAN7.
Registry Keys
| ||
|---|---|---|
| ||
Key | Type | Description |
Fingers | DWORD | Number of fingers |
Irq | DWORD | IRQ-number; Defines which GPIO will be used for touch-interrupt. Use for Trizeps IV, V, VI |
IrqPin | DWORD | SODIMM-Pin to use as Interrupt. Use for Trizeps VII |
SampleRate | DWORD | max. number of samples per seconds while touch is pressed |
MaxCalError | DWORD | tolerance for calibration |
Threshold | DWORD | Threshold at which the touch will be detected: 20..80, default: 40 |
Gain | DWORD | Gain: 2..31, default: 7..10 |
Offset | DWORD | Offset (linearity to the sides ): 0..31, default: 0 |
xl,xr,yt,yb | DWORD | Border ( left,right,top,bottom) to use for measured touch values. This will move touch values, which are outside the border, into the active screen area. |
DetectHardware | DWORD | Bitmask of different Focaltech Firmware to check.
Only FT5 (0x01) has a detection-routine. The other
will be selected if it fails.
0x01 (Default) Used on FT5 and most FT6 labeled devices.
0x02 FT6.
0x04 Evervision. |
Parameters with Cover-Glass
Finger | ||||
|---|---|---|---|---|
| None | 1mm glass | 2mm glass | 3mm glass |
Gain | 8 | 7 | 5 | 4 |
Threshold | 40 | 40 | 30 | 25 |
Offset | 0 | 15 | 25 | 25 |
Stylus | ||||
|---|---|---|---|---|
| None | 1mm glass | 2mm glass | 3mm glass |
Gain | 8 | 5 | 4 | 4 |
Threshold | 40 | 30 | 25 | 20 |
Offset | 0 | 20 | 25 | 25 |
Calibration Application
Sample application to set threshold, gain and offset values.
Please note that you need to store the registry and reboot for changes to take effect, when using the single-touch driver.
The multi-touch-driver supports changing those settings on the fly.