Hello to the group. I am new to Arduino. My electronics knowledge is rusty, I’ve been away from electronic design and programming for about 20 years. I will be posting my progress with the SPI interface. The novice should be able to follow along, hence I will try to explain everything in full detai…

Arduino Serial I/O expansion, Serial Peripheral Interface (SPI) using MPC23S17

system January 28, 2011, 8:26am 5

There's at least one shield that already does this, although I suspect you'd rather cook up your own home-grown design: centipede_shield [macetech documentation]

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