HSYNC, VSYNC, & Porch Calculations

[PBU]

Hi,

I'm having a doubt related to HSYNC, VSYNC and Porch Calculations. I'm working with STM32F746G Disco Board and wanted to understand how these values are calculated. The HSYNC, VSYNC, HBP, HFP, VBP, VFP values mentioned in data sheet (https://cache.nxp.com/docs/en/supporting-information/RK043FN02H-CT.pdf) and the driver file (rk043fn48h.h) in examples provided by ST are totally different. Could anyone explain about this.

Thanks

[Martin KJELDSEN]

Hi PBU,

Did you mean to ask this question in the TouchGFX forum?

[Tesla DeLorean]

You're at the front line of the graphics support, take a swing...

[PBU]

Hi Martin,

In TouchGFX Generated file also i found the same. Sorry Where is the right place to ask this question?

[Martin KJELDSEN]

Don't be sorry. This is more of a general hardware question - You'd probably get more answers if you posted it in one of the other subforums.

In terms of TouchGFX, it is possible to manipulate the timing of the application by modifying the porch areas. Once your application is done and you're seeing some long render times (Maybe you want 60 fps) , delaying the VSYNC signal ever so slightly can help improve the overall performance of the application.

This is something we've done in the past.

[PBU]

yeah ok. Thanks