Posts: 7
Joined: Thu Jul 19, 2012 11:33 am

Raspberry Pi + Arduino + SPI

Wed Sep 12, 2012 3:11 pm

Hi everyone.
I'm trying to connect my Arduino at SPI so I can have more than 1 Arduino in my Raspberry Pi.

I found this website http://mitchtech.net/raspberry-pi-arduino-spi/
It is a tutorial about how to do it.

There is a comment at the bottom of the tutorial:
Wow, can the 3.3V RPi tolerate the 5V TTL levels of the Arduino?
Hmm from http://elinux.org/RPi_Low-level_peripherals “The pins use a 3V3 logic level and are not tolerant of 5V levels, such as you might find on a 5V powered Arduino.”.
It might work only because the example doesn’t send any information from the Arduino back to the Pi and thus putting 5v on the Pi input pin.
I don't want to blow up my RasPi, but i'd like to know if someone has already tried this...

Bst Regards,
Raúl Suárez

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