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| TheMoth | mithro: I'm not terribly familiar with FPGA's yet, but I do have experience with the Capacitive sensing side. Has there been any thinking about how the circuit can be implemented with the hardware available on the board? | 00:11 |
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| mithro | TheMoth: there are a bunch of approaches | 00:12 |
| mithro | TheMoth: Send a pseudo random sequence on one pin and look for number of matches on the other pin.... | 00:13 |
| TheMoth | mithro: I've read that the LVDS pins can be used as comparators and using the self capacitance of a pin with a counting relaxation oscillator is the simplest method I know of. It does require an internal reference and is sensitive to noise in the IO drive voltage and reference and there don't seem to be many specs around the mode in the datasheet | 00:24 |
| TheMoth | so the PRS transmit-recieve method seems promising. I'll start there and see what happens | 00:24 |
| mithro | TheMoth: Just needs to be good enough that you can tell person touching the buttons | 00:25 |
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| xobs | mithro: not that I'm aware of | 02:19 |
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| mithro | xobs: How can we go about unforking foboot's hardware from the LiteX-BuildEnv stuff? | 21:49 |
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