File list (Check if you may need any files):
HelloWorld
..........\HelloWorld
..........\HelloWorld.avrsln
..........\HelloWorld.avrsuo
..........\..........\Debug
..........\..........\.....\HelloWorld.d
..........\..........\.....\HelloWorld.eep
..........\..........\.....\HelloWorld.elf
..........\..........\.....\HelloWorld.hex
..........\..........\.....\HelloWorld.lss
..........\..........\.....\HelloWorld.map
..........\..........\.....\HelloWorld.o
..........\..........\.....\led.d
..........\..........\.....\led.o
..........\..........\.....\makedep.mk
..........\..........\.....\Makefile
..........\..........\.....\usart.d
..........\..........\.....\usart.o
..........\..........\HelloWorld.avrgccproj
..........\..........\HelloWorld.cpp
..........\..........\led.cpp
..........\..........\led.h
..........\..........\usart.cpp
..........\..........\usart.h