How to add different data for two lines in one dynamic graph?

9 replies
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Hi,i want to make a oscilloscope to show two data curve.I found the dynamicgraph can add many lines with different color.BUT i can only use the "addDataPoint" fuction to add one data at one time.So I set the two lines the different LineWidth.

Just like this.

These two lines show the same data,becuse the addDataPoint function can just input one variate.I want to know how can i draw multiple lines that show the different data in one dynamic graph?

TouchGFX

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ktrofimo

Senior III

Every line on the graph will be presented as dynamicGraphX (or whatever you have named it) class.

Then you should add all data at the same time:

dynamicGraph1.addDataPoint( value1 );
dynamicGraph2.addDataPoint( value2 );
dynamicGraph3.addDataPoint( value3 );

EWqqr.1Author

Associate

I just create one dynamicgraph widget,it will be error.

I want to show these two lines which in the right just in dynamicgraph1.:persevering_face:

ktrofimo

Senior III

Check your Screen1ViewBase.hpp header for correct names. They should be of type touchgfx::GraphScroll<NNN> like:

touchgfx::GraphScroll<100> dynamicGraph1;
touchgfx::GraphScroll<100> graph2;
touchgfx::GraphScroll<100> graph3;

Then use those classes.

Osman SOYKURT

ST Technical Moderator

Hello EWqqr.1,

I wouldn't recommend you to use 2 lines elements for a single dynamic graph widget. The easiest way would be to use 2 different widgets like this :

Be careful to uncheck the boxes on "Vertical Grid Lines", "Horizontal Grid Lines", "X-Axis Labels" and "Y-Axis Labels". That way, you will have 2 independent graph lines in the same view.