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Altera_Forum
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16 years ago

Video IP Scaler control

Hello, I'm having trouble using the Scaler in the Video IP suite. I have instantiated the scaler using the megawizard and my control logic is custom. I have instantiated a fixed scaler ...
Altera_Forum's avatar
Altera_Forum
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16 years ago

Okay there is your problem. With avalon streaming interfaces, there is the notion of "ready latency". The VIP components use a ready latency of "1" on the AV-ST interfaces. Your screenshot shows your are using a ready latency of 0.

Please reference section 6.3 of:

http://www.altera.com/literature/manual/mnl_avalon_spec.pdf

and page 4-11 of the VIP user guide:

http://www.altera.com/literature/ug/ug_vip.pdf?gsa_pos=1&wt.oss_r=1&wt.oss=ug_vip

Jake