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@@ -1157,6 +1157,45 @@ The firmware supports 5 different light effects, and the color (hue, saturation,
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Please note the USB port can only supply a limited amount of power to the keyboard (500mA by standard, however, modern computer and most usb hubs can provide 700+mA.). According to the data of NeoPixel from Adafruit, 30 WS2812 LEDs require a 5V 1A power supply, LEDs used in this mod should not more than 20.
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+## PS/2 Mouse Support
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+
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+Its possible to hook up a PS/2 mouse (for example touchpads or trackpoints) to your keyboard as a composite device.
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+In order to do this you must first enable the option in your Makefile.
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+
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+ PS2_MOUSE_ENABLE = yes
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+
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+Then, decide whether to use interrupts (better if your microcontroller supports them) or busywait, and enable the relevant option.
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+
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+ PS2_USE_INT = yes
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+ // PS2_USE_BUSYWAIT = yes
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+
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+If you're using a teensy and have hooked up the clock on your PS/2 device to D1 and the data to D0, you're all set.
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+Otherwise, you will need to update the following defines in your `config.h`:
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+
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+ #define PS2_CLOCK_PORT PORTD
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+ #define PS2_CLOCK_PIN PIND
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+ #define PS2_CLOCK_DDR DDRD
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+ #define PS2_CLOCK_BIT 1
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+
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+ #define PS2_DATA_PORT PORTD
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+ #define PS2_DATA_PIN PIND
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+ #define PS2_DATA_DDR DDRD
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+ #define PS2_DATA_BIT 0
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+
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+And with `PS2_USE_INT` also define these macros:
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+
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+ #define PS2_INT_INIT() do { \
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+ EICRA |= ((1<<ISC11) | \
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+ (0<<ISC10)); \
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+ } while (0)
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+ #define PS2_INT_ON() do { \
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+ EIMSK |= (1<<INT1); \
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+ } while (0)
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+ #define PS2_INT_OFF() do { \
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+ EIMSK &= ~(1<<INT1); \
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+ } while (0)
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+ #define PS2_INT_VECT INT1_vect
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+
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## Safety Considerations
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You probably don't want to "brick" your keyboard, making it impossible
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Jack Humbert