These errors
Error: C:\cvavr\inc\usart.h(114): undefined symbol 'i'
Error: C:\cvavr\inc\usart.h(117): undefined symbol 'i'
Error: C:\cvavr\inc\usart.h(120): undefined symbol 'temp'
Error: C:\cvavr\inc\usart.h(122): undefined symbol 'temp'
are the consequence of
Error: C:\cvavr\inc\usart.h(113): undefined symbol 'unsignedchar'
Error: C:\cvavr\inc\usart.h(114): undefined symbol 'unsignedchar'
The compiler tells you that
unsignedchar
is unkown. You just have to find where you forgot the space.