PPC 150 T-CT wich is touchscreen

We have an Advantech panel pc: PPC 150 T-CT wich is touchscreen. The touch
is connected to /dev/ser4.
We could make that the touch screen works, with the driver

microtch -b9600
uart -pPORT -iIRQ

Photon recognize the touch, but we cant calibrate it fine. The virtual area
is smaller than real (around 1 inch). It means that when the mouse pointer
reach the min X or max X, the finger is still around 1 inche from the
border…

We used the last version of the Input file, in QNX4.25 patch E, and photon
1.13C and 1.14.
We tried several drivers but none works fine.

Also i touched the calibration file absf.node but it is in the max coord
(16384) and even i changed it i cannot reach the calibration.

Anyone can help us about this?
Any driver?
THANKS IN ADVANCE

Leandro Medina
(Ingdesi Group - R&D)