ifdef PS2_USE_BUSYWAIT
SRC += protocol/ps2_busywait.c
+ SRC += protocol/ps2_io_avr.c
OPT_DEFS += -DPS2_USE_BUSYWAIT
endif
ifdef PS2_USE_INT
SRC += protocol/ps2_interrupt.c
+ SRC += protocol/ps2_io_avr.c
OPT_DEFS += -DPS2_USE_INT
endif
ifdef PS2_USE_USART
SRC += protocol/ps2_usart.c
+ SRC += protocol/ps2_io_avr.c
OPT_DEFS += -DPS2_USE_USART
endif