SPI

The Serial Peripheral Interface Bus (SPI) is a serial data transfer protocol useful for interacting with a wide variety of hardware peripherals.

The public libmaple API for managing the SPI ports is the HardwareSPI class.

Recommended Reading

• Wikipedia Article on Serial Peripheral Interface Bus (SPI)
• Arduino reference on SPI
• Hardcore SPI on Arduino by kik64
• ST Documentation:
  • Reference Manual RM0008 (PDF), Chapter 25, “Serial Peripheral Interface”