Emwin Touch Calibration

[anujtanksali]

Am using iMXRT 1064 device with touch screen LCD and Emwin graphical library v5.50

Am using analog touch screen driver and using function GUI_TOUCH_Calibrate to calibrate the touch.

for compilation using MCUXPresso 11.1 but am getting a compiler error for the function call GUI_TOUCH_Calibrate

"undefined reference to `GUI_TOUCH_Calibrate"

my gui.h contains the prototype definition for GUI_TOUCH_Calibrate.

if any other touch function is used such as GUI_TOUCH_EnableCalibration it compiles successfully so emwin header includes for my project seems to be correct.

Are analog touch screen driver functions supported in the emwin version 5.50

is there any configuration macro which needs to be enabled please let me know.

I compiled the same on evkmimxrt1064_emwin_gui_demo sample project from SDK and observing the same error.

Please let me know as this is critical to our project.

Thanks

Regards,

Anuj

[jeremyzhou]

Hi  Anuj Tanksali,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
1) Is there any configuration macro which needs to be enabled please let me know.
-- To provide the fastest possible support, I'd highly recommend you to refer to the attachment: emWin user guide.

Have a great day,
TIC

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[hfuhruhurr]

Dear Support-Member,

instead of bluntly directing the poster to the manual though he cleary pointed out what may be the problem, what about doing your homework?

Using the nm tool on the three libraries 5.50, 6.10, 6.14 (the libemWin_M3.a file) yields:

5.50 and 6.10 do not contain the specified function.

The GUI_TOUCH_DriverAnalog module is "empty". The libs do also not contain the GUI_TOUCH_Exec function (which is needed according to the manual).

6.14 again contains these functions.

Furthermore, 6.14 has obviously turned off the debouncing of the touch input.

I needed to circumvent that by using timers in the dialog code which process the buttons which get activated from time to time when there noise on the touch panel input.

And: in my case, when I use PROGBAR_SetText(), in about 30%, the text is not taken over by the progbar.

All this is gone when I revert back to 5.38.(where I will stay)

Regards,

Rainer

P.S. for your reference excerpts of the output from nm for version 5.5

GUI_TOUCH_DriverAnalog.o:
00000000 T GUI_TOUCH_DriverAnalog_C

LCD_GetColorIndex.o:

and for version 6.14

GUI_TOUCH_DriverAnalog.o:
00000000 b _OrientationLog
00000000 b _xPhys
00000000 b _yPhys
U abs
00000000 b axRef.9466
00000000 b axSample.9468
00000000 b ayRef.9467
00000000 b aySample.9469
U GUI_pContext
U GUI_TOUCH_CalcCoefficients
00000000 T GUI_TOUCH_Calibrate
U GUI_TOUCH_CalibratePoint
00000000 T GUI_TOUCH_Exec
U GUI_TOUCH_GetLayer
00000000 T GUI_TOUCH_GetxPhys
00000000 T GUI_TOUCH_GetyPhys
00000000 T GUI_TOUCH_SetOrientation
U GUI_TOUCH_StoreStateEx
U GUI_TOUCH_X_ActivateX
U GUI_TOUCH_X_ActivateY
U GUI_TOUCH_X_MeasureX
U GUI_TOUCH_X_MeasureY
00000000 b IsPressed.9480
U LCD_GetXSizeEx
U LCD_GetYSizeEx
00000000 b Mask.9465
00000000 b ReadState.9479
00000000 d xLast.9483
00000000 d yLast.9484

LCD_GetColorIndex.o: