The Universal Asynchronous Receiver Transmitter features a two-pin UART that can be used for communication and trace purposes and offers an ideal medium for in-situ programming solutions
ASF specific FreeRTOS functionality that integrates ASF driver libraries with FreeRTOS services to provide a set of highly efficient peripheral interface functions
This driver for Atmel® | SMART ARM®-based microcontrollers provides an interface for the configuration and management of the the Peripheral Direct Memory Access (DMA) Controller (PDC) module