There are ten functions created by the SPI library, that you use to allow your Arduino to interact with SPI devices on the bus.

There are several files in that path, including the example code that is available to you in the IDE, but the heart of SPI communications with an Arduino resides in two files… Arduino/hardware/arduino/avr/libraries/SPI directory on the machine you write your code on.

The SPI Library is a series of files in plain text that exist in the. Additionally, if you wish to replicate the oscilloscope traces, use a four channel oscilloscope capable of reading a 4Mhz signal connected to the SCK, MISO, MOSI and Chip Select lines between an Arduino and any SPI chip, and then send each function listed below as necessary with sufficient delay time in between to allow you to view the resulting scope trace.

Be very careful when opening those files though, that you don’t modify them or you’ll need to reinstall everything from scratch. No setup is required, however you can access the files that comprise the SPI library in the program folders installed with your Arduino IDE. No schematic is associated with this module. Know which functions actually cause data to transmit and which are only preparatory.Learn the 10 SPI Library functions and their purpose.Determine which commands are used to configure the SPI interactions.Now that we have a firm understanding of how we need to configure the signals to communicate with a SPI component, let’s look at the Arduino SPI Library that will actually manage all of that signaling for us.

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