The Serial Peripheral Interface (SPI) interface was initially standardized by Motorola in 1979 for short-distance communication in embedded systems. In its most common four-wire configuration, full… ...

Being An SPI Slave Can Be Trickier Than It Appears. January 8, 2019 by Kerry Scharfglass 10 Comments ... If we just wanted to read and write some data we wouldn’t have gotten that Arduino!