Friday, 2016-01-22

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cr1901_modernmithro: I assume you want a sliding-window average for the frequency?01:23
cr1901_modernI'm thinking about how to implement that in hardware efficiently01:24
mithroI think we can probably do that in software?01:50
mithrocr1901_modern: maybe just keep the last 10 values?01:51
cr1901_modernmithro: 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 frequency02:04
cr1901_modernOr 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
mithrocr1901_modern: basically I want to end up with what that post shows02:15
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mithroBoarding plane to Melbourne08:01
mithroHow did this get here so quickly :-(08:02
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mithroLiving off for 2 hours08:10
mithroSee ya!08:10
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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. (
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travis-ci[timvideos/HDMI2USB-misoc-firmware/master#329] (c1d2705): The build passed. (
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