Arduino SPI

Hi I am trying to use SPI to interface with a sensor chip, but I cant get a clock signal out of my arduino micro's sck pin on the icsp header or the sck pin on the booard! Help!

-Omar

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Former Member over 12 years ago in reply to billabott +1

Don't feel bad Billabbott, reading you is always helpful and instructive.

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0 billabott over 12 years ago

My guess is that you must use a digital i/o pin to simulate a clock signal.

Going to arduino.cc and looking at an example that uses

#include <SPI.h>

and supports my guess in that Digital Pin 13 is used for SCK.
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0 Former Member over 12 years ago in reply to billabott

On the Arduino Nano pin 13 and sck are the same. I looked at the schematic. But on my Micro that is not the case. I checked to see whether I am getting a clock from the crystal oscillator and I am, but I am still not able to get a clock out of either sck pin.
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0 billabott over 12 years ago in reply to Former Member

Well, think about this; Only when the Master of the SPI is talking or listening will there be a CLK on DP13. In other words, the program has to be running. In particular, SPI.begin(); must have been executed.

Reference Documentation for SPI is here: http://arduino.cc/en/Reference/SPI

Jeremy Blum covers SPI output on this video: http://www.youtube.com/watch?v=1nO2SSExEnQ

and SPI Input on this video: http://www.jeremyblum.com/2010/08/27/reacxion-build-progress/
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0 billabott over 12 years ago in reply to Former Member

1. Wow. Your "nano" was made by whom? What Atmel chip is on your "nano" board? This is info you should have provided in you very first posting.

2. If I had known that Raivis Rengelis had already answered this same question. I would not have bothered to answer here.

3. Multiple postings of the same question - is abuse of your priviledges on element14 , IMO. Don't do it, Omar.
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0 Former Member over 12 years ago in reply to billabott

Don't feel bad Billabbott, reading you is always helpful and instructive.
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0 Former Member over 12 years ago in reply to billabott

Don't feel bad Billabbott, reading you is always helpful and instructive.
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