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Altera_Forum
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14 years ago

problem about dspbuilder input

I need a source to simulation the project? But I can't find the source? I use sine wave to connect "altbus"(the simulink compile error: can't infer data type). I use sine wave to connect "input" ...
Altera_Forum's avatar
Altera_Forum
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14 years ago

The input block you have there is configured to be a 24-bit integer. You're feeding in a real input with a range from 0 to 2 so it's quantising it. There are only 3 possible values: 0, 1 and 2. 2 doesn't happen because it requires time = pi/2 which your granularity doesn't allow for.

Change the input block to have type signed binary fractional and set the number of fractional bits to something more than 0 and you should see something more like your original signal.