cancel
Showing results for 
Search instead for 
Did you mean: 

Decrease Display FPS

AMerc.4
Senior

Hello,

i'm running touchgf in my 720x720 18bit display. I need to decrease the fps because of the heavy rendering time.

I know that to decrease the refresh rate i need to change the LTDC clock frequency. Now it is working with 25MHz (which should be approximately 50Hz). I know also that i need to change the porch timings when i decrease the TFT frequency.

Actually they are:

HSW = 20

HBP = 20

Active Width = 720

HFP = 10

VSH = 10

VBP = 10

Active Height= 720

VFP = 10

My question is how much i need to decrease each value to get 25Hz frame rate? I kown that i have to change the TFT clock to 13MHz, but what about porch timings?

10 REPLIES 10

Changing De to AH and clock polarity i can't see anything. In the datasheet there is no Tclk definition.