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corecode | something odd happened to me with nextpnr - new version doesn't want to place SB_LED_DRV_CUR anymore | 16:31 |
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gatecat | corecode: can you give me an example design and I'll have a look? | 17:32 |
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corecode | i'll rebuild everything here to make sure that it still is the case | 17:46 |
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justchen1369 | hi | 22:37 |
justchen1369 | how could I synthesize a design down into just logic gates? | 22:37 |
justchen1369 | when I try I still end up with an sdffe node | 22:37 |
mwk | yosys cannot synthesize FFs into logic gates; that'd be just asking for trouble since you really want them to be implemented via well-characterised pre-designed cells | 22:54 |
mwk | if you really want to do it, you can provide your own mapping with techmap (perhaps together with dfflegalize and/or dffunmap to reduce the number of different cells you need to map) | 22:55 |
justchen1369 | FF? | 22:56 |
mwk | flip-flops | 22:56 |
justchen1369 | ah | 22:56 |
justchen1369 | I realized quickly that yosys has a deceptively high learning curve haha | 22:56 |
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