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@@ -1157,6 +1157,45 @@ The firmware supports 5 different light effects, and the color (hue, saturation, 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. +## PS/2 Mouse Support + +Its possible to hook up a PS/2 mouse (for example touchpads or trackpoints) to your keyboard as a composite device. +In order to do this you must first enable the option in your Makefile. + + PS2_MOUSE_ENABLE = yes + +Then, decide whether to use interrupts (better if your microcontroller supports them) or busywait, and enable the relevant option. + + PS2_USE_INT = yes + // PS2_USE_BUSYWAIT = yes + +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. +Otherwise, you will need to update the following defines in your `config.h`: + + #define PS2_CLOCK_PORT PORTD + #define PS2_CLOCK_PIN PIND + #define PS2_CLOCK_DDR DDRD + #define PS2_CLOCK_BIT 1 + + #define PS2_DATA_PORT PORTD + #define PS2_DATA_PIN PIND + #define PS2_DATA_DDR DDRD + #define PS2_DATA_BIT 0 + +And with `PS2_USE_INT` also define these macros: + + #define PS2_INT_INIT() do { \ + EICRA |= ((1<<ISC11) | \ + (0<<ISC10)); \ + } while (0) + #define PS2_INT_ON() do { \ + EIMSK |= (1<<INT1); \ + } while (0) + #define PS2_INT_OFF() do { \ + EIMSK &= ~(1<<INT1); \ + } while (0) + #define PS2_INT_VECT INT1_vect + ## Safety Considerations You probably don't want to "brick" your keyboard, making it impossible |