mirror of
https://github.com/dekuNukem/USB4VC.git
synced 2025-10-31 11:26:46 -07:00
26 lines
449 B
Plaintext
26 lines
449 B
Plaintext
very useful video:
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https://youtu.be/wdgULBpRoXk
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search for PID ACK for data packet
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from keypress to PID ACK on USB line: 10 to 20ms
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catting /dev/input/event0 in bash: 490us
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printing via python3: 1ms
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script below:
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fff = open("/dev/input/event0", "rb" )
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while 1:
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data = fff.read(24)
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print(data)
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using queue to despatch SPI on raspberry 3: 700 to 800us
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on lichee 3.5ms
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hand parse raw dev/input: 470us on pi3, 1ms on lichee
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32 byte fixed
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