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Altera_Forum's avatar
Altera_Forum
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17 years ago

ERROR: positive-number required for log2

I'm trying to design an SOPC component that has an avalon-slave interface, and two master interfaces. The slave interface goes to the Nios, and the master interfaces (will) be connected to the SDRAM ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

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Strange, if you specify a number of bits, the software should not need the log2 anymore to calculate the width.

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You would have to look at the particular IP, to understand where it's actually needed.

The function is often used in parameterizable HDL components/modules, could be that a bitwidth parameter is converted to a range respectively a factor and back to a bitwidth at another code location. And of course, input parameters should be explicitely range checked by the core if the range is limited.