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| cr1901_modern | mithro: I assume you want a sliding-window average for the frequency? | 01:23 |
|---|---|---|
| cr1901_modern | I'm thinking about how to implement that in hardware efficiently | 01:24 |
| mithro | I think we can probably do that in software? | 01:50 |
| mithro | cr1901_modern: maybe just keep the last 10 values? | 01:51 |
| cr1901_modern | mithro: We count every time there is a transition on the V and H sync lines (accounting for polarity), and my idea was to store the sample numbers at which the transitions occur. Subtracting the least recent sample from the most recent (modular arithmetic) and dividing by 10 and multiplying by the sample rate should get you the frequency | 02:04 |
| cr1901_modern | Or we can do it in software. Just throwing out ideas; the most naive freq counter (fixed window, gives you the frequency of the previous 1/60 sec frame) I can make seems a bit too simple for your needs. | 02:05 |
| mithro | cr1901_modern: basically I want to end up with what that post shows | 02:15 |
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| mithro | Boarding plane to Melbourne | 08:01 |
| mithro | How did this get here so quickly :-( | 08:02 |
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| mithro | Living off for 2 hours | 08:10 |
| mithro | See ya! | 08:10 |
| thaytan | o/ | 09:32 |
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| mithro | _florent_: ping? | 12:47 |
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| travis-ci | [timvideos/HDMI2USB-misoc-firmware/master#328] (44849a4): The build passed. (https://travis-ci.org/timvideos/HDMI2USB-misoc-firmware/builds/104185822) | 22:29 |
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| travis-ci | [timvideos/HDMI2USB-misoc-firmware/master#329] (c1d2705): The build passed. (https://travis-ci.org/timvideos/HDMI2USB-misoc-firmware/builds/104204951) | 23:51 |
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