Nios® II Embedded Design Suite (EDS)
Support for Embedded Development Tools, Processors (SoCs and Nios® II processor), Embedded Development Suites (EDSs), Boot and Configuration, Operating Systems, C and C++
Announcements
Intel Support hours are Monday-Fridays, 8am-5pm PST, except Holidays. Thanks to our community members who provide support during our down time or before we get to your questions. We appreciate you!

Need Forum Guidance? Click here
Search our FPGA Knowledge Articles here.
12409 Discussions

NIOS II pixel buffers shows strange dots on VGA screen

AAlas3
New Contributor I
418 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

0 Kudos
4 Replies
Ahmed_H_Intel1
Employee
246 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

AAlas3
New Contributor I
246 Views

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

Ahmed_H_Intel1
Employee
246 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.

 

Ahmed_H_Intel1
Employee
246 Views

Assigning a default slave

Reply