Custom screen refresh on Hisense eink phones

kandwo · 04-08-2023, 04:56 AM

The one thing missing for me using Koreader on Hisense A5 Pro and A9 is the ability to set the full screen refresh rate. From my understanding it's a driver issue - nobody has written a driver to control the refresh within Koreader.

Recently, I stumbled upon this app: https://forum.xda-developers.com/t/h...uired.4483213/.

It's a refresh app for all Hisense devices. I got it to work on my A5 Pro following the instructions. I set a refresh every 1 operations for Koreader and it works great for refreshing every page turn. However, it also refreshes for every operation in the menus or the file browser.

Is there any way to transfer the screen refresh code from there into Koreader itself? It would be much more comfortable to control it from within the program - also to avoid the full refresh in menus. And having an app control global refresh is a bit overkill for me, as I only need it in my reading app.

NiLuJe · 04-08-2023, 02:27 PM

A link to the sources would be the first step.

kandwo · 08-31-2023, 12:43 AM

It doesn't seem like the developers of that piece of software are active anymore. They have not replied in the thread.

Now the A5 Pro has a root available. Would this make it possible to somehow monitor and/or control the signals sent to the device/OS for a full screen refresh? Would that information then be useful for creating a driver?

I have no idea how these drivers are written and I'm not a developer or coder myself, but would be willing to run some tests if it's something that I could manage

kandwo · 09-24-2023, 04:56 AM

So it seems that com.hmct.epd.EpdManager.forceClear is the function that calls the full refresh. And it can be triggered by adb command "adb shell service call epd 21". See here: https://forum.xda-developers.com/t/h.../post-89036219.

What kind of other values need to be found for there to be a working driver?

Is there a specific path one can take to find out such value/commands/etc?

pazos · 09-24-2023, 12:01 PM

https://www.mobileread.com/forums/sh...14&postcount=2

04-08-2023, 04:56 AM	#1
kandwo Addict Posts: 357 Karma: 10703708 Join Date: Dec 2020 Device: Kindle Paperwhite 3	Custom screen refresh on Hisense eink phones The one thing missing for me using Koreader on Hisense A5 Pro and A9 is the ability to set the full screen refresh rate. From my understanding it's a driver issue - nobody has written a driver to control the refresh within Koreader. Recently, I stumbled upon this app: https://forum.xda-developers.com/t/h...uired.4483213/. It's a refresh app for all Hisense devices. I got it to work on my A5 Pro following the instructions. I set a refresh every 1 operations for Koreader and it works great for refreshing every page turn. However, it also refreshes for every operation in the menus or the file browser. Is there any way to transfer the screen refresh code from there into Koreader itself? It would be much more comfortable to control it from within the program - also to avoid the full refresh in menus. And having an app control global refresh is a bit overkill for me, as I only need it in my reading app.

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04-08-2023, 02:27 PM	#2
NiLuJe BLAM! Posts: 13,479 Karma: 26012494 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	A link to the sources would be the first step.

08-31-2023, 12:43 AM	#3
kandwo Addict Posts: 357 Karma: 10703708 Join Date: Dec 2020 Device: Kindle Paperwhite 3	It doesn't seem like the developers of that piece of software are active anymore. They have not replied in the thread. Now the A5 Pro has a root available. Would this make it possible to somehow monitor and/or control the signals sent to the device/OS for a full screen refresh? Would that information then be useful for creating a driver? I have no idea how these drivers are written and I'm not a developer or coder myself, but would be willing to run some tests if it's something that I could manage

09-24-2023, 04:56 AM	#4
kandwo Addict Posts: 357 Karma: 10703708 Join Date: Dec 2020 Device: Kindle Paperwhite 3	So it seems that com.hmct.epd.EpdManager.forceClear is the function that calls the full refresh. And it can be triggered by adb command "adb shell service call epd 21". See here: https://forum.xda-developers.com/t/h.../post-89036219. What kind of other values need to be found for there to be a working driver? Is there a specific path one can take to find out such value/commands/etc?

09-24-2023, 12:01 PM	#5
pazos cosiñeiro Posts: 1,274 Karma: 2200073 Join Date: Apr 2014 Device: BQ Cervantes 4	https://www.mobileread.com/forums/sh...14&postcount=2