AVR_Dx_Atmel_Studio/RTOSDemo/serial/usart.c
AVR_Dx_MPLAB.X/serial/usart.c

AVR_Dx_Atmel_Studio/RTOSDemo/serial/serial.c
AVR_Dx_MPLAB.X/serial/serial.c

AVR_Dx_Atmel_Studio/RTOSDemo/serial/usart.h
AVR_Dx_MPLAB.X/serial/usart.h