I'm trying to use an Arduino as a slave and was searching for examples which I found many. But apart from the examples, I haven't found any documentation explaining many thing that show up in those examples.
For example, I'd like a document that would state what things like the following are:
-SPCR
-SPE
-SPDR
-ISR
-SPI_STC_vect
I'm asking this, because I don't and can't just copy an example and hope that it'll work, I really need to know what I'm doing.
Thank you,
João