Connecting bus widths smaller than the port size

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Hi Folks,

Thanks for your help and apologies to SLV for not actually answering your question before but you guessed correctly. I have taken your example and tried the attached, which seems to work.

Is there a way defining which bits go to which (say if you have abus[15..8] connected to aport[7..0] does it always connect the highest bits together in descending order? Don't feel obliged to answer...).

Thanks again for all your input.

Best regards,

H

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Hi H,

You didn't indeed answer my question, but my guess was ok.

To swap bit order, you can use a small simple piece of VHDL-code, as attached, including Quartus symbol file.

Can also be used to split busses, or to make a bus partially constant, with some minor modifications.

Consider this as my gift to the public domain :-)

To be used without any warranty.

Cheers, Ton