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Altera_Forum's avatar
Altera_Forum
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19 years ago

Avalon communication

Hey guys! I've a design base on an NIOS, an IP i've developed and the ddr ip. Here is the connection with a screenshot of my sopc builder project. http://mitch.53.free.fr/bordel/sopc.jp...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

Hi Romain

The problemin the waveform you've sent it with the waitrequest signal. Nios asks to read, but is only told to wait a few clock cycles later. The waitrequest is, contrary to other Avalon signals, an asynchronous signal, meaning that your slave should assert it as soon as it gets a read/write request. It should release it only when the data has been read/written.

Nir