Graph widget is too slow

vahidajalluian · Aug 3rd 2020, 9:12pm

Hello
So far I have been able to create a project with STM32cube old versions and stemwin 5.44. I use stm32f429igt6 MCU.
Problem:
I have 4 graphs to be drawn. Graph widget is too slow. Since each graph have diffent structures, I should use 4 graph widget.

Is emwin really too slow or some other mistakes by me? if I remove the graphs, the total GUI works fine.

Is there exist any fast implementation?

Sample that is updated really slow

Source Code

GUI_Delay(1);
Value = GUI__SinHQ(((Angle++) % 360) * 1000);
Value = (50 * Value) >> 16;
GRAPH_DATA_YT_AddValue(hData1, (I16)Value + 60);
Value = GUI__SinHQ(((Angle+60) % 360) * 1000);
Value = (50 * Value) >> 16;
GRAPH_DATA_YT_AddValue(hData2, (I16)Value + 60);
Value = GUI__SinHQ(((Angle+120) % 360) * 1000);
Value = (50 * Value) >> 16;
GRAPH_DATA_YT_AddValue(hData3, (I16)Value + 60);
Value = GUI__SinHQ(((Angle+180) % 360) * 1000);
Value = (50 * Value) >> 16;
GRAPH_DATA_YT_AddValue(hData4, (I16)Value + 60);

Display All

Any help would be appreciated

SEGGER - Florian · Aug 5th 2020, 4:02pm

Hi,

you would have to add more values at once in order for the curve to update faster. Every value added with GRAPH_DATA_YT_AddValue() only equates to 1px in width of the curve.

It makes sense to store the values in an array, if they are not dynamic, to save CPU time.

Best regards,

Florian

vahidajalluian · Aug 11th 2020, 6:50am

Values are dynamically read from adc,
yes, I tried the solution you said earlier and the result was somehow good, but forgot to mention it here.

Thank you

Graph widget is too slow

Graph widget is too slow

Source Code

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