STemWin Touch Driver (ADS7843) problem

Hello All,

I am setting up STemWin on STM32F103VE MCU. The graphical part is all setup and working fine!

The problem is the Builtin touch screen driver of STemWin. I have gone through the manual and created the low level SPI communication part and tested it separately and is working fine. I am able to read the ADC values and they are perfect for touched positions.

And after that I have registered this low level i/o layer to STemWin using a call to

GUITDRV_ADS7846_CONFIG Config = {0};
 
 Config.pfSendCmd = ADS7843SendCmd;
 Config.pfGetResult = ADS7843GetResult;
 Config.pfGetBusy = ADS7843GetBusy;
 Config.pfGetPENIRQ = ADS7843GetPENIRQ;
 Config.pfSetCS = ADS7843SetCS;
 Config.xLog0 = 0;
 Config.xLog1 = 319;
 Config.xPhys0 = 4000;
 Config.xPhys1 = 600;
 Config.yLog0 = 0;
 Config.yLog1 = 239;
 Config.yPhys0 = 800;
 Config.yPhys1 = 4000;
 Config.Orientation = GUI_SWAP_XY;
 GUITDRV_ADS7846_Config(&Config);

I have placed breakpoint at the function which get ADC results from ADS7843 chip. And I am calling these function periodically as specified in the manuals.

GUI_Exec();
GUITDRV_ADS7846_Exec();

But my problem is that Widgets are NOT responding to touches and the pointer is fixed at 0,0 always.