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Use vsync on Tufty#16

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MichaelBell wants to merge 3 commits intopimoroni:mainfrom
MichaelBell:use-vsync
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Use vsync on Tufty#16
MichaelBell wants to merge 3 commits intopimoroni:mainfrom
MichaelBell:use-vsync

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@MichaelBell
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Some of the demos had noticeable tearing, this pays attention to vsync to fix that. I've made it on by default and added a binding to switch it off if you want to avoid the sync delay.

Also I found my display corrupting at certain overclocks (240MHz was fairly consistently bad for me). Fixed by rounding the divider up to the nearest multiple of half, to avoid any clocks being too short.

@Gadgetoid
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This is awesome, thank you. I have cherry-picked these onto the dev branch - #11 - so we've got a complete test build.

@Gadgetoid Gadgetoid closed this Feb 5, 2026
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