ATmega2560 UART0 implementation

[참조문서]

ATmega2560 Datasheet

doc2549.pdf

ATMEL Application notes

doc1451.pdf

UART1.c

UART2.c

USART1.c

USART2.c

[Implementation Code]

usart.c

usart.h

ATmega2560의 Fuse bit 설정.