that allows him to open an SPI connection, initialize, transfer, and close the connection. After connecting an Arduino to the MOSI, MISO and SCK pins of his Arduino, [Louis] was able to transfer ...

The eSi-SPI core can operate as a SPI master or slave. Multiple chip-selects are supported in master mode, to allow connection to multiple slave devices. The SPI is supplied with an AMBA APB slave ...

You can’t make use of all of these at once, but with up to four different connections wired to a single ... remixed from Raspberry Pi 4 GPIO pinout diagram by [Les Pounder].