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qmk-firmware/keyboard/hhkb/doc/V-USB.md

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V-USB controller for HHKB

Not supported actively any more.

Build

Use Makefile.vusb for V-USB controller. $ make -f Makefile.vusb

##Hardware ###3. V-USB connection +---+ +---------------+ USB GND | | ATmega328p | ~~~ C3 | | 5V <-------+--------+---|Vcc,AVCC | HHKB pro pro2 R1 | | ~~~~~~~~ ~~~~ D- <----+--+-----R2-----|INT1 PB2-4|------->ROW (6-8) (5-7) D+ <----|---+----R3-----|INT0 PC0-2|------->COL (9-11) (8-10) Z1 Z2 | PC3|------->ENABLE (12) (11) GND<----+---+-----------|GND PB0|<-------KEY (4) (3) | PB1|------->PREV (5) (4) | | GND+-C2--+--|XTAL1 RXD|------->Debug Console X1 | TXD|<-------Debug Console GND+-C3--+--|XTAL2 RST|---SW--+GND +---------------+ R1: 1.5K Ohm R2,R3: 68 Ohm Z1,Z2: Zener 3.6V C1,C2: 22pF C3: 0.1uF X1: Crystal 12MHz SW: Push Switch(for bootloader)

  • NOTE: See V-USB documentation for more detail of hardware and the USB stack.
  • NOTE: USBaspLoader is very useful for firmware update.