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markbolhuis / hideizo

Linux HID device driver for EIZO EV FlexScan monitors
GNU General Public License v2.0
26 stars 3 forks source link

Protocol counter #2

Closed loblik closed 10 months ago

loblik commented 2 years ago

Hello,

thanks for your work. I have two ev2456 and I also started looking into this. I was just thinking about some quicker more hacky python/hidapi userspace solution.

Do you know what's the reason for the counter in the protocol? Probably to identify different applications? So application is supposed to get a new value at startup and use that during its runtime? This counter survives power off and even factory reset of the monitor. Hopefully it overflows to zero after it reaches 65535.

loblik commented 2 years ago

Ok. It does not survive power-off. I was talking to other display then I thought.

markbolhuis commented 2 years ago

Hi there, I'm not sure what that counter is for, I'm just replicating what the Screen-InStyle software does. It may very well be for identification of different applications, although I'm not sure why the monitor would need to keep track of that. And yes the counter does overflow to 0.