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| sf-slack | <mbpeterson70> I'm new to fasm2bels and trying to get it running, and the few design/parts I've tried running it on gives me a tcl script with "set route "[list ] " and then "set_property FIXED_ROUTE $route $net" at the end of the script. Vivado keeps complaining about the set_property line needing at least one object. The tcl script seems to run fine when I get rid of the line, but I'm wondering if this is something I should | 19:51 |
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| sf-slack | create an issue about, look into more, or am I just doing something wrong? | 19:51 |
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| litghost | mbpeterson70: That indicates there is a net with nothing on it, which is pretty weird | 22:55 |
| litghost | mbpeterson70: To make the xdc output more robust, you could change the output to be `set_property FIXED_ROUTE "$route" $net`, which works even if $route is "" | 22:57 |
| litghost | mbpeterson70: But there is likely a lurking bug in the fact that the net has no nodes on it | 22:58 |
| sf-slack | <mbpeterson70> @litghost: Hmm I tried that and Vivado still wasn't able to get over that line. | 23:33 |
| litghost | mbpeterson70: What is "$net" in this case? If that is also empty, that is the "real" issue, but the whole thing smells like a bg | 23:34 |
| litghost | bug | 23:34 |
| sf-slack | <mbpeterson70> @litghost: Yes, I think you're right. The line above that: `set net [get_nets {<const0>}]` . There was a couple other things that looked odd that I sent to you on a direct message. | 23:44 |
| litghost | mbpeterson70: So the constant nets are important to preserving the exact routing into Vivado. I find it basically impossible that you have a design that never uses const0, but I guess it is possible. Where did the design originate? | 23:45 |
| sf-slack | <mbpeterson70> It's just a simple counter that I wrote (and then generated a bitstream for in Vivado) to get a feel for how fasm2bels worked. | 23:47 |
| litghost | mbpeterson70: In the Vivado, if you run "get_property ROUTE [get_nets {<const0>}]" what do you get? | 23:55 |
| litghost | e.g. on your original design | 23:55 |
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