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Altera_Forum's avatar
Altera_Forum
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17 years ago

SignalTap logging to external memory?

Hi, Is it possible to get SignalTap to use external memory for data logging? I got 256MByte of DDR2 memory in my NIOS system, using the Altera DDR2 memory controller. Logging traces to t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

DDR2 is going to have bandwidth issues. Hopefully too much, but if it's too little than the capture will fail. In-system memory works because only and exactly what is necessary will be used. More importantly, if the design had DDR2 on it, most likely the designer has their own controller and it's part of system operation(unless it's a development kit that happened to have DDR2 on it). So there's no way for SignalTap to access the DDR2 without altering the user's design.