I recently got a Nexys 4 DDR and I'm trying to get started with a simple switch/blink-LED program. I'm using ISE Design Suite 14.5 (nt64) and I'm getting warning messages that's preventing the design from completely compiling. This is what I tried:
Created a very simple design (in schematic mode) using three switch inputs, an LED output, and basic logic (AND & NAND)
Added 3 ibuf, one for each input and an obuf for the output
Assigned each ibuf/obuf pin numbers from reference manual (e.g. LOC = J15)
Added I/O markers, labeled A, B, C (inputs), and F (output)
Get the following warning messages during compile (Implement Design > Map)
WARNING:LIT:701 - PAD symbol "A" has an undefined IOSTANDARD.
WARNING:LIT:702 - PAD symbol "A" is not constrained (LOC) to a specific location
Thus, I'm unable to generate a Programming File (bit file?)
What am I doing wrong? Am I missing a step? This was pretty much the same procedure I followed when I worked with the first-gen Basys board, using an older version of ISE (9.2), and I was able to do much more complex designs with no problems. From what I understand, I would create a design in ISE 14.5, compile it using Synthesize-XST, Implement Design, and Generate Programming File (bit file?). Then I would send the bit file to the Nexys 4 DDR using Digilent Adept?
Should I start using the Vivado Design Suite? I heard it's like $2000+ for a license. I also heard there's a device-limited license?
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jcchong
I recently got a Nexys 4 DDR and I'm trying to get started with a simple switch/blink-LED program. I'm using ISE Design Suite 14.5 (nt64) and I'm getting warning messages that's preventing the design from completely compiling. This is what I tried:
What am I doing wrong? Am I missing a step? This was pretty much the same procedure I followed when I worked with the first-gen Basys board, using an older version of ISE (9.2), and I was able to do much more complex designs with no problems. From what I understand, I would create a design in ISE 14.5, compile it using Synthesize-XST, Implement Design, and Generate Programming File (bit file?). Then I would send the bit file to the Nexys 4 DDR using Digilent Adept?
Should I start using the Vivado Design Suite? I heard it's like $2000+ for a license. I also heard there's a device-limited license?
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