Is high speed waveform display feature possible in TouchGFX?

[canbu22]

Is there a template or a sample application that one can use to develop fast running waveform display feature in TouchGFX? (such as that of a oscilloscope waveform display and not a static or slow speed 1-dim graph display)

if not any suggestions? ..thanks..

[IB.1]

Hi @Martin KJELDSEN​ 

Thank you for your reply. We have modify TouchGFXConfiguration.cpp file by adding follow code to the touch_gfx_init() function

void touchgfx_init()
{
 Bitmap::registerBitmapDatabase(BitmapDatabase::getInstance(), BitmapDatabase::getInstanceSize());
 TypedText::registerTexts(&texts);
 Texts::setLanguage(0);
 
 FontManager::setFontProvider(&fontProvider);
 
 FrontendHeap& heap = FrontendHeap::getInstance();
 (void)heap; // we need to obtain the reference above to initialize the frontend heap.
 
 hal.initialize();
 
	#define CANVAS_BUFFER_SIZE (3600)
 static uint8_t canvasBuffer[CANVAS_BUFFER_SIZE];
 CanvasWidgetRenderer::setupBuffer(canvasBuffer, CANVAS_BUFFER_SIZE);
 
}

But it seems it didnt really helped. as soon as we enable:

Graph graph;

application crashes. Can you please advise if there is/are anything else we should look at.

Thank you for all your support.

Regards,

IB

[Martin KJELDSEN]

Please beware that you're modifying a file in the "generated/" folder which will get overwritten if you should generate code from CubeMX again.

That being said, are you debugging? What's the application doing when it crashes?

/Martin

[IB.1]

Hi @Martin KJELDSEN​ 

Thank you for reply.

Very good point on modifying "generated" files, at this point I just want to get it running.

here the screen shot from debugger when application ""crashed"

Tracing it back:

While was typing I was thinking should I place any canvases or any other "UI elements" on screen while generating tuch GFX project?

Anything else I can provide you with? Please advise...

Thank you for all the support

Regards,

IB

[Dejan Nedeljkovic]

Hi

Did you adapt the painter to your system?

I had a similar behaviour and then I changed from PainterRGB565 to PainterRGB888 in Graph.hpp.

It depends on your TouchGFX settings which painter class to use.

Regards

Dejan

[Martin KJELDSEN]

This is also a very good point. The LCD class will assert if the format is not correct. People tend to copy the Graph from project to project without considering the pixel format.

/Martin

[IB.1]

Hi @Martin KJELDSEN​ @Dejan Nedeljkovic​ 

This is definitely helps and I can see simple graph on the screen... Thank you for all your help.

Question what I have, how would you recommend to declare frame buffer without modifying "generated" files (TouchGFXConfiguration.cpp)

ie

void touchgfx_init()
{
 Bitmap::registerBitmapDatabase(BitmapDatabase::getInstance(), BitmapDatabase::getInstanceSize());
 TypedText::registerTexts(&texts);
 Texts::setLanguage(0);
 
 FontManager::setFontProvider(&fontProvider);
 
 FrontendHeap& heap = FrontendHeap::getInstance();
 (void)heap; // we need to obtain the reference above to initialize the frontend heap.
 
 hal.initialize();
 
#define CANVAS_BUFFER_SIZE (3600)								
static uint8_t canvasBuffer[CANVAS_BUFFER_SIZE];							
CanvasWidgetRenderer::setupBuffer(canvasBuffer, CANVAS_BUFFER_SIZE);		
}

Thank you very much for all your help and support.

Regards,

IB

[Dejan Nedeljkovic]

You can set the canvas buffer size in TouchGFX.

Select the Screen where your graph should be drawn and then you can set the canvas buffer to another value:

[IB.1]

Thank you Gentlemen for all your Help