Experiment with higher SPI speeds about inky HOT 9 OPEN

Interesting. Now if only I knew what version of display I have..

from inky.

I have reached out to a Pimoroni developer regarding chipsets, in hopes of getting some information so we can figure this out.

from inky.

Nice. Hope they're up for some sharing :)

from inky.

You did a bunch of profiling for your new performance changes. Any good recommendations for attempting to profile this sort of thing? What did you end doing for measurements? I guess you didn't have to measure on-device since you were mostly processing data structures..

from inky.

Hello - Have you profiled at all at different SPI speeds? It looks like you are also using 448 kHz, so does this mean that you encounter issues when using the inky pHat at higher SCLK frequencies (say, 1 MHz)?

Cheers! :)

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I think I tried a few variations but ended up settling on what was used in the original python library. Feel free to try some things and measure the results :)

from inky.

Thanks! Were there display issues?

I may be playing around with this relatively soon, I will report back my results!

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I quite honestly don't recall :D

I believe during certain experiments there was blurriness from previous images. Not sure if that was was experimenting with speeds or with the blanking.

The biggest difference in update speed for me has been running the red inky configured as black. No color but much faster.

from inky.

You did a bunch of profiling for your new performance changes. Any good recommendations for attempting to profile this sort of thing? What did you end doing for measurements? I guess you didn't have to measure on-device since you were mostly processing data structures..

I think I just used the built-in timer in BEAM and created a simple utility for gathering tagging starts and stops of timers. I don't even recall how I did everything, hehe. I want to say that a fair bit of time was spent waiting for the hardware to run the cycles defined by the LUTs.

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