040000 tree e3ba2d03c53733aeaf7f6d5e9b35452a501168ac	sam_uart
100644 blob d265441dc59ef668ad372a2c695e1abc5d4780a5	serial.h
100644 blob bbefc95bc078d4ace72701a26d505d754e7ca4c7	usart_serial.c