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ARM split - detect USB to select master/slave (#6424)

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* Initial split refactor to allow usb master detection

* Add split USB detect docs

* Add SPLIT_USB_DETECT demo mode limitation

* fix rebase issues

* clang-format
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Joel Challis authored and Danny committed 2019-10-11 23:25:43 -04:00
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docs/config_options.md
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@@ -267,6 +267,14 @@ There are a few different ways to set handedness for split keyboards (listed in
* 4: about 26kbps
* 5: about 20kbps
* `#define SPLIT_USB_DETECT`
* Detect (with timeout) USB connection when delegating master/slave
* Default behavior for ARM
* Required for AVR Teensy
* `#define SPLIT_USB_TIMEOUT 2500`
* Maximum timeout when detecting master/slave when using `SPLIT_USB_DETECT`
# The `rules.mk` File
This is a [make](https://www.gnu.org/software/make/manual/make.html) file that is included by the top-level `Makefile`. It is used to set some information about the MCU that we will be compiling for as well as enabling and disabling certain features.