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@@ -197,8 +197,27 @@ If you define these options you will enable the associated feature, which may in
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Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk
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-* `#define SPLIT_HAND_PIN B7`
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- * For using high/low pin to determine handedness, low = right hand, high = left hand. Replace 'B7' with the pin you are using. This is optional and you can still use the EEHANDS method or MASTER_LEFT / MASTER_RIGHT defines like the stock Let's Split uses.
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+### Setting Handedness
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+
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+One thing to remember, the side that the USB port is plugged into is always the master half. The side not plugged into USB is the slave.
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+
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+There are a few different ways to set handedness for split keyboards (listed in order of precedence):
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+
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+1. Set `SPLIT_HAND_PIN`: Reads a pin to determine handedness. If pin is high, it's the left side, if low, the half is determined to be the right side
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+2. Set `EE_HANDS` and flash `eeprom-lefthand.eep`/`eeprom-righthand.eep` to each half
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+3. Set `MASTER_RIGHT`: Half that is plugged into the USB port is determined to be the master and right half (inverse of the default)
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+4. Default: The side that is plugged into the USB port is the master half and is assumed to be the left half. The slave side is the right half
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+
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+* `#define SPLIT_HAND_PIN B7`
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+ * For using high/low pin to determine handedness, low = right hand, high = left hand. Replace `B7` with the pin you are using. This is optional, and if you leave `SPLIT_HAND_PIN` undefined, then you can still use the EE_HANDS method or MASTER_LEFT / MASTER_RIGHT defines like the stock Let's Split uses.
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+
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+* `#define EE_HANDS` (only works if `SPLIT_HAND_PIN` is not defined)
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+ * Reads the handedness value stored in the EEPROM after `eeprom-lefthand.eep`/`eeprom-righthand.eep` has been flashed to their respective halves.
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+
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+* `#define MASTER_RIGHT`
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+ * Master half is defined to be the right half.
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+
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+### Other Options
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* `#define USE_I2C`
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* For using I2C instead of Serial (defaults to serial)
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@@ -206,6 +225,20 @@ Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in yo
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* `#define SOFT_SERIAL_PIN D0`
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* When using serial, define this. `D0` or `D1`,`D2`,`D3`,`E6`.
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+* `#define MATRIX_ROW_PINS_RIGHT { <row pins> }`
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+* `#define MATRIX_COL_PINS_RIGHT { <col pins> }`
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+ * If you want to specify a different pinout for the right half than the left half, you can define `MATRIX_ROW_PINS_RIGHT`/`MATRIX_COL_PINS_RIGHT`. Currently, the size of `MATRIX_ROW_PINS` must be the same as `MATRIX_ROW_PINS_RIGHT` and likewise for the definition of columns.
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+
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+* `#define SELECT_SOFT_SERIAL_SPEED <speed>` (default speed is 1)
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+ * Sets the protocol speed when using serial communication
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+ * Speeds:
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+ * 0: about 189kbps (Experimental only)
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+ * 1: about 137kbps (default)
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+ * 2: about 75kbps
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+ * 3: about 39kbps
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+ * 4: about 26kbps
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+ * 5: about 20kbps
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+
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# The `rules.mk` File
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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.
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