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Oddly there is a Raspberry Pi 3 sitting on my desk today. I find myself a little reluctant to setup the BTD loop for it (BTD = build test debug), because at the end of the day I'm going to have a (physically small) linux box. Which is fine because I plan on installing a network proxy on it that only needs wifi. But how is the Pi a gateway to embedded programming? It has pinouts you can attach an oscilloscope to?

The hardware is better documented and less complicated than a full intel PC, I think is the general goodness to it. It's designed specifically to 'tinker' with.

Yes, it has a GPIO header that has pins that mux to a limited number of periphals. You can attach an oscilloscope to any GPIO.

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