Include avr library in my sketch

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hi all,

i newbie in , having problem trying include avr libraries/header files avr/io.h in sketch. ide says fatal error, no such file or directory.

the reason why need library because found piece code online uses functions , predefined variables such admux, _bv(), adcsra , adsc

my arduino ide under windows 8.1 environment , understand avr library in path arduino/hardware/tools/avr/avr/include/avr    it seems can't add file path.

i read how library under tools folder can't added because not under core folder, tried copy , paste avr library sketchbook/libraries , didn't work.

can show me how include files such avr/io.h in code? thanks.

f33d

"avr/io.h" automatically linked via ide. believe included in wiring.h file.

add line @ top of sketch:

#include <avr/eeprom.h>


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