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Ahoora's avatar
Ahoora
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4 years ago

leave a port without input in block diagram

I made a counter using the lpm library and did not assign input for both cnt_en and sset pins.(first photo) (Because I thought that according to the Intel document (second photo) by default, it set...
Ahoora's avatar
Ahoora
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4 years ago

Prime Lite 20.1

ShengN_altera's avatar
ShengN_altera
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4 years ago

Hi Ahoora,

Did you refer to this manual of lpm_counter ? Looks like that manual is main for Quartus Pro 20.3.

I used Lite 20.1 to synthesis the lpm_counter bdf with port cnt_en and sset unconnected. However, I couldn't find any cnt_en and sset as default pin in converted VHDL.

When I tried the lpm_counter bdf with Pro 20.3. I found that there is a different folder ''tmp-clearbox'' in Pro 20.3 folder with a .tdf file in it (file attached below).

In .tdf file, the cnt_en and sset pins are both set to default values when unconnected. I think quite possibly that causes the difference between Pro 20.3 and Lite 20.1 regarding unconnected port.

Best regards,
Sheng