[GH-ISSUE #170] is it possible to write to IO space using nbfc? #153

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opened 2026-02-26 00:31:52 +03:00 by kerem · 3 comments

kerem commented

2026-02-26 00:31:52 +03:00

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Originally created by @dude-sam on GitHub (Jan 11, 2017).
Original GitHub issue: https://github.com/hirschmann/nbfc/issues/170

Is it possible to write to IO space ? The system im working on changes the fan speed by writing to a single bit in a register in the IO space. Thank you

Originally created by @dude-sam on GitHub (Jan 11, 2017). Original GitHub issue: https://github.com/hirschmann/nbfc/issues/170 Is it possible to write to IO space ? The system im working on changes the fan speed by writing to a single bit in a register in the IO space. Thank you

kerem

2026-02-26 00:31:52 +03:00

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kerem commented

2026-02-26 00:31:53 +03:00

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@hirschmann commented on GitHub (Jan 13, 2017):

Currently not. Maybe I can help you if you provide some more information like, notebook model, OS and most importantly, how do you want to change the fan speed by only changing a single bit (just on/off?).

@hirschmann commented on GitHub (Jan 13, 2017): Currently not. Maybe I can help you if you provide some more information like, notebook model, OS and most importantly, how do you want to change the fan speed by only changing a single bit (just on/off?).

kerem commented

2026-02-26 00:31:53 +03:00

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@dude-sam commented on GitHub (Jan 13, 2017):

Thanks for your reply Hirschmann. My apologies for being so brief.

I am trying to control an external chassis fan for an intel NUC. The fan is controlled by custom transistor circuitry and can either be low or high. To switch to high I need to be able to switch bit 31 at base address 1E30 in the IO space (0 for low speed- 1 for high speed). I can do this using RWeverything, but wondered if this functionality may be included in nbfc as RWeverything doesn't have any monitoring capabilities.

Thanks

Sam

@dude-sam commented on GitHub (Jan 13, 2017): Thanks for your reply Hirschmann. My apologies for being so brief. I am trying to control an external chassis fan for an intel NUC. The fan is controlled by custom transistor circuitry and can either be low or high. To switch to high I need to be able to switch bit 31 at base address 1E30 in the IO space (0 for low speed- 1 for high speed). I can do this using RWeverything, but wondered if this functionality may be included in nbfc as RWeverything doesn't have any monitoring capabilities. Thanks Sam

kerem commented

2026-02-26 00:31:53 +03:00

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@hirschmann commented on GitHub (Jan 15, 2017):

I guess the easiest way to do this would be to write your own plugin for NBFC.
Just implement IEmbeddedController. The implementation could look like ECWindows but instead of implementing EmbeddedControllerBase, you could would e.g. call HardwareMonitor.WriteIoPort() in your implementation of IEmbeddedController.WriteByte().
Unfortunately you have to hard code the base address because the interface doesn't allow addresses > 255.

@hirschmann commented on GitHub (Jan 15, 2017): I guess the easiest way to do this would be to write your own plugin for NBFC. Just implement [IEmbeddedController](https://github.com/hirschmann/nbfc/blob/master/Core/StagWare.FanControl/Plugins/IEmbeddedController.cs). The implementation could look like [ECWindows](https://github.com/hirschmann/nbfc/blob/master/Core/Plugins/StagWare.Plugins.ECWindows/ECWindows.cs) but instead of implementing _EmbeddedControllerBase_, you could would e.g. call _HardwareMonitor.WriteIoPort()_ in your implementation of _IEmbeddedController.WriteByte()_. Unfortunately you have to hard code the base address because the interface doesn't allow addresses > 255.

kerem referenced this issue

2026-02-26 00:34:54 +03:00

[PR #153] [MERGED] Add Asus K43SD.xml #1270