Widget redraw and visibility

[ForTest]

It's hard to explain but i'll try..

In my project i perfrom many gwinSetText that writes on different labels updating values, for example a time clock

The refresh seems to be good but every 10-15 seconds i get a noisy "black refresh" on the widget

In attachment my ugfx configuration. Any idea why this happen?

 

The same thing happen if i put an image on another image and i perform gwinSetVisible action in way to switch betweeen images (like if it's a button)

Some times i get a black area on the image.

 

My project is a baremetal so there are not other threads and readrawing operations should be immediate.

My MCU is a K64F Cortex M4 at 120Mhz... i don't think i should have these problems.. what do you think it could be?

 

Thank you

gfxconf.h

Edited September 12, 2016 by ForTest

[Joel Bodenmann]

We've never heard of such behavior before. I'm not really sure what to tell you... There's nothing obviously wrong in your configuration file.
A couple of questions that might help to track down this issue:

• Is this "new" behavior or did you experience this issue since the first time you used µGFX?
• Are you getting that behavior only on that specific platform or can you reproduce the same issue running your µGFX application in a Windows / Linux / OS X environment?
• Are you updating the label/image contents in a loop or does this only happen when the user clicks something?
• Is it worse when the user is clicking around more?
• Is the time interval consistent?
• Is it really just that widget area that gets blacked out or the entire screen / other portions too?
• Is it a solid black?
• Does the color change if you use a different widget style (different background color)?
• Is it possible to reproduce the problem by creating a new, minimal test-case project?
• Are there other things that stop working during that time?

I'm sorry that we can't tell you exactly what the issue is right now. We've never experienced this before.