alexandred/VoodooI2CDev

blankmac

@blankmac

Hey guys, seems the old methods of live logging to the console from the kernel don't work anymore (ie - IOLog). I'm trying to chase down this problem and would like to output some of the input data live -- blankmac/AlpsT4USB#7

Any advice?

Avery Black

@1Revenger1

I was having a similar issue with VoodooRMI - I ended up adding a prefix to all the logging data using a pre-processor macro so that all my debug statements began with "VRMI - " and then used sudo dmesg

you generally will want to use the boot-arg msgbuf=1548576 as well to increase the max size of the dmesg buffer. That's the best way I've found, though I would like iolog to work again ;-;

oops, msgbuf should be 1048576, not the number I gave before

Ben Raz

@ben9923

@blankmac I’ve been asking users to attach dmesg logs for a while now
An alternative to the boot arg should be injecting DebugEnhancer.kext. IIRC it allows an even bigger buffer for logs (it’s patching the kernel after all).
We should add it to our docs.

zhen-zen

@zhen-zen

Any advice?

Honestly, life could be much easier debugging with Catalina. Specifically the live monitor part. The dmesg don't support -w and the watch command is still unsatisfying.

blankmac

@blankmac

Ok, that was enough to get me the info I needed. Thanks guys.

Leonard Church

@343iChurch

Hiya. So I have a unique scenario in which my laptop has a PS/2 keyboard but an I2C touchpad. I cannot get them both working consistently due to conflicts between the kexts -- when the touchpad works, the keyboard is disabled until a wake/sleep cycle. Is there a way to properly use both VoodooI2C and VoodooPS2?

Kishor Prins

@kprinssu

@343iChurch wrong channel, please use VoodooI2C, there really isn't an issue with a PS2 keyboard and a I2c trackpad, there's probably something else going on

Leonard Church

@343iChurch

@kprinssu gotcha, thanks. Sorry, thought I was in the other channel.

Kishor Prins

@kprinssu

@zhen-zen CI is broken due to cldoc not being maintained any more and cpplint requires Python 3

it's dependency hell

zhen-zen

@zhen-zen

lol, that also blocks Xcode build for beginner

Kishor Prins

@kprinssu

@ben9923 put up a fix for the CI, builds should be working

Avery Black

@1Revenger1

https://github.com/VoodooI2C/VoodooI2CHID/pull/52/files
Not sure how you guys feel about gotos, but this seems like a weird usage of them. Don't know if you guys want them or not

Avery Black

@1Revenger1

stuff like this:
https://github.com/VoodooI2C/VoodooI2CHID/pull/52/files#diff-a17b259a35228d1fa6e960ea2b4eb5931aec9585cee01403b5e89a8da9d54493R820-R827
https://github.com/VoodooI2C/VoodooI2CHID/pull/52/files#diff-a17b259a35228d1fa6e960ea2b4eb5931aec9585cee01403b5e89a8da9d54493R709-R713
https://github.com/VoodooI2C/VoodooI2CHID/pull/52/files#diff-a17b259a35228d1fa6e960ea2b4eb5931aec9585cee01403b5e89a8da9d54493R398-R399
Just seems kind of funky lol

Ben Raz

@ben9923

@1Revenger1 Code should probably refactored into a different event driver anyway.

It's basically a copy-paste of VoodooI2C/VoodooI2CHID#3, that wasn't merged due to code style (and maybe the fact it's in the multitouch code) issues

Avery Black

@1Revenger1

@ben9923 I updated the PR again reworking the I2C section: https://github.com/dortania/Getting-Started-With-ACPI/pull/42/files
I ended up just going back to _OSI to XOSI or creating your own OSYS variable within I2C0/1/2 or whatever

We weren't able to figure out any other better way to do. I'd make a Lilu plugin for it, but this occurs way too early for me to use Lilu with it

Andrea Somaini

@thegoldgoat

Hello everyone, I wanted to write a devide driver for a virtual multitouch touchpad on macOS. I’ve been prompted to take a look at VoodooInput, but I still don’t understand how to build/test a kext effectively. After disabling SIP it looks like I need to reboot every time I rebuild a kext, is there a faster way to install/test during development? Thanks in advance :)

Avery Black

@1Revenger1

Do it in Catalina, you can live load/unload kexts

Big Sur is just a giant pain to develop in tbh because of the newer kernelcache

Andrea Somaini

@thegoldgoat

Oh I see, that’s really unfortunate

Thanks a lot ;)

Andrea Somaini

@thegoldgoat

Another thing: my goal was to eventually be able to distribute some user-installable app, should I use DriverKit instead of a kernel extension? Maybe the whole process would be easier that way

Avery Black

@1Revenger1

DriverKit is only going to work for 10.15+, so if you want to support 10.11-10.14, you have to use IOKit

I don't have much experiance with DriverKit tbh, I know VoodooInput is in kernel space though

Andrea Somaini

@thegoldgoat

Alright, thanks again :)

Kishor Prins

@kprinssu

@thegoldgoat VoodooI2C, VoodooRMI, and VoodooSMBus all have working examples of VoodooInput integrations

if you want to look driver development, look at Apple's IOKit development docs (though it's deprecated now and will be removed as Apple pushes people to use DriverKit)

Andrea Somaini

@thegoldgoat

@kprinssu Yeah Apple is really pushing DriverKit, indeed that's what I ended up using. The difference with IOKit in terms of API looks very subtle to me BTW

shiecldk

@shiecldk

Hello, I'm trying to fix the stylus issue in VoodooI2C. Could someone point me which portion of the code I can work on? I am hoping to contribute to VoodooI2C with my programming experience if no one can fix it. I found the multitouch gesture is not working on the touchscreen with the stylus pen on the secondary screen in my ASUS ZenBook Pro Duo 15 (has the main 4k and secondary touchscreens. Only the cursor and click functions work. (multi touch, scroll, and hold to drag/right click functions are not available.) The secondary touchscreen comes with stylus pen and support multi touch in Windows 10 and Ubuntu). I have tried disconnected the main touchscreen (unplug the eDP connector from MB), and had only the secondary screen in macOS 10.15.7. However, the issue remains the same. (only the cursor and click functions work.)

Kishor Prins

@kprinssu

@astro-lee-k Take a look at:
https://github.com/VoodooI2C/VoodooI2CHID/blob/master/VoodooI2CHID/VoodooI2CStylusHIDEventDriver.cpp#L23

And https://github.com/VoodooI2C/VoodooI2CHID/blob/master/VoodooI2CHID/VoodooI2CMultitouchHIDEventDriver.cpp#L187

shiecldk

@shiecldk

@kprinssu Thank you so much for pointing these out. I'll start looking into the code from here.

shiecldk

@shiecldk

Sorry for a stupid question. Could I ask what is wrapper in VoodooI2C and where does VoodooI2CMultitouchHIDEventDriver check for stylus and decide whether to disable multitouch functions?

Avery Black

@1Revenger1

I don't think that MultitouchHIDEvent checks for a stylus, it's a usage pair

https://github.com/VoodooI2C/VoodooI2CHID/blob/master/VoodooI2CHID/Info.plist#L59-L78

though, I could be wrong

shiecldk

@shiecldk

I found this could be where MultitouchHIDEvent checks for stylus
https://github.com/VoodooI2C/VoodooI2CHID/blob/master/VoodooI2CHID/VoodooI2CMultitouchHIDEventDriver.cpp#L187-L203

Also I'm sure what wrapper means, I keep seeing it in MultitouchHIDEvent and StylusHIDEvent
https://github.com/VoodooI2C/VoodooI2CHID/blob/master/VoodooI2CHID/VoodooI2CMultitouchHIDEventDriver.cpp#L685-L699

shiecldk

@shiecldk

@1Revenger1 Is it possible compile VoodooI2C in Catalina or Big Sur? I see a compiling error "'IOKit/IOLib.h' file not found" in my Xcode.

zhen-zen

@zhen-zen

Clone MacKernelSDK to your project folder

zhen-zen

@zhen-zen

Is it inside the VoodooI2C folder?

➜  VoodooI2C git:(master) ls
Dependencies          Multitouch Support    VoodooI2C Satellites
Documentation         README.md             VoodooI2C.xcworkspace
LICENSE.txt           Utilities             docs
MacKernelSDK          VoodooI2C

shiecldk

@shiecldk

Yes I fixed it. However, there is another error I'm fixing now

/Users/username/Library/Developer/Xcode/DerivedData/VoodooI2C-brfmrnnidcznlxgxjrczhdfukmxm/Build/Intermediates.noindex/VoodooI2C.build/Release/VoodooI2C.build/Script-ACA4A00D21E25F0E00A91B61.sh: line 2: cpplint: command not found
Command PhaseScriptExecution failed with a nonzero exit code

you need to install cldoc from https://voodooi2c.github.io/ and other dependencies.

I'm trying to figure out how to install cldoc

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