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NIOS II pixel buffers shows strange dots on VGA screen

AAlas3
New Contributor I
756 Views

Hey,

I am using DE2-115, my problem is when I use Pixel buffer to draw anything on the screen it works but it also draws small strange dots with different colors, I tried to clear the buffers but they still appear.

Thanks in advance

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Ahmed_H_Intel1
Employee
584 Views

Hi,

Did you assign a default slave IP to clear all the invalid transactions?

Are you using a DMA to stream on this screen?

Regards

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AAlas3
New Contributor I
584 Views

Yes clearly the pixel buffer is with DMA, what do you mean by slave IP ?

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Ahmed_H_Intel1
Employee
584 Views

The slave IP is an option to assign an IP as a slave IP in Qsys. This helps to clear any invalid transactions that might cause a glitch in the system.

You can simply add a PIO IP into your Qsys design and then assign this IP as a default slave as shown in the image below.

 

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Ahmed_H_Intel1
Employee
584 Views

Assigning a default slave

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