EK-TM4C1294XL: How to clear the LCD (BOOSTXL-K350QVG-S1 QVGA Display BoosterPack)

silpa JAYARAJ

Part Number: EK-TM4C1294XL
Other Parts Discussed in Thread: BOOSTXL-K350QVG-S1

I am using BOOSTXL-K350QVG-S1 QVGA Display BoosterPack and TM4C -1294XL.

While trying to update a variable periodically it is overwritten on top of it. Can somebody tell me how to solve the issue?

Regards,

Silpa

over 7 years ago

0 Bob Crosby over 7 years ago

TI__Guru 72500 points

Are you using the graphics library "grlib.lib" that comes with TivaWare? When you create the "CanvasWidget" set the attributes as CANVAS_STYLE_FILL | CANVAS_STYLE_TEXT

0 silpa JAYARAJ over 7 years ago in reply to Bob Crosby

Intellectual 450 points

Yes I am using grlib.lib.

I want to periodically clear screen and update it.

I'm calling extern void WidgetRemove(tWidget *psWidget) function to clear current screen, but the screen is not clearing.

Regards,
Silpa

0 silpa JAYARAJ over 7 years ago in reply to silpa JAYARAJ

Intellectual 450 points

Or is there any way to reset/ clear entire display.

0 Bob Crosby over 7 years ago in reply to silpa JAYARAJ

TI__Guru 72500 points

Removing the widget does not automatically erase whatever it previously displayed on the screen. After removing the widget you can repaint with a call to:

        WidgetPaint(WIDGET_ROOT);

0 silpa JAYARAJ over 7 years ago in reply to Bob Crosby

Intellectual 450 points

Sir,

I try adding WidgetPaint(WIDGET_ROOT);

But still it is not clearing the screen.

I am attaching the code of my project below. Please help in resolving the issue.

grlib_demo1.zip

Regards,

Silpa

0 silpa JAYARAJ over 7 years ago in reply to silpa JAYARAJ

Intellectual 450 points

Sir,

Please help in solving this issue.

0 Bob Crosby over 7 years ago in reply to silpa JAYARAJ

TI__Guru 72500 points

Perhaps the example in: "C:\ti\TivaWare_C_Series-2.1.4.178\examples\boards\dk-tm4c129x\hello_widget" will help you.

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Arm-based microcontrollers forum

EK-TM4C1294XL: How to clear the LCD (BOOSTXL-K350QVG-S1 QVGA Display BoosterPack)