The sam-lib C library provides an API for controlling peripherals of microcontrollers. Supported devices include microcontrollers from the Microchip (Atmel) AT91 family, specifically SAM3N, SAM3S, SAM4N, and SAM4S chips. Supported standard peripherals include SUPC, RSTC, WDT, PMC, EEFC, UART, USART, PIO, TWI, ADC, DACC, SPI, TC, and various hardware components connected to the microcontroller, such as buttons, LEDs, LEDUI, IO extenders (shift registers), and more.

• Standardized API (designed for the AZTech framework).
• Implementation of low-level serial communication protocols.
• Designed for real-time applications with multitasking support (dependent on FreeRTOS).
• Efficient interrupt handling.
• Utilizes DMA where applicable.
• Instances of communication peripherals are represented as C structures with synchronous (blocking) read() and write() operations.
• Supports low-power modes of the microcontroller. Peripheral blocks are turned off when entering sleep mode.