[TriEmbed] ​ Logic analyzer recommendation

[Martin Brooke]

​Chip:

If the devices worked OK separately, then most likely it is either an
address conflict or signal level problems.  Check the data sheets for
address issues, and a​n analog oscilloscope like the DSO nano will quickly
tell you if there are signal level problems.  If they are not loading the
serial lines properly you could have levels getting too low. when both
devices are on the line.

It is also possible you are trying to go too far, try a short line to see
if that helps.




> -------- Original message --------
> From: Chip McClelland
> Date:01/17/2015 11:40 AM (GMT-05:00)
> To: triembed at triembed.org
> Subject:
> ​​
> [TriEmbed] Logic analyzer recommendation
>
> To all,
>
> I am trying to troubleshoot an issue with multiple devices on an i2c bus.
> Do any of you have a recommendation for an inexpensive logic analyzer that
> I could use to troubleshoot?  Ideally it would be able to look at SPI and
> simple digital and analog lines. Mac compatibility is a must. Any
> recommendations?
>
> Adafruit has a Sallae 4-channel analyzer that is my current front runner
> but don't want to spend $100 and find out it is not the best choice.
> https://www.adafruit.com/products/2312
> Thanks,
>
> Chip
>
>
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