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Posted to notifications@mynewt.apache.org by "Vipul Rahane (JIRA)" <ji...@apache.org> on 2017/06/14 02:14:00 UTC

[jira] [Commented] (MYNEWT-782) Atmel SAMD21 i2c probing

    [ https://issues.apache.org/jira/browse/MYNEWT-782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16048613#comment-16048613 ] 

Vipul Rahane commented on MYNEWT-782:
-------------------------------------

This might be case of clock stretching as I encountered the same with BNO055. I have a tickets opened for it:
https://issues.apache.org/jira/browse/MYNEWT-631.
Linking it to this ticket to give more context. There is also a capture attached to the ticket.

> Atmel SAMD21 i2c probing
> ------------------------
>
>                 Key: MYNEWT-782
>                 URL: https://issues.apache.org/jira/browse/MYNEWT-782
>             Project: Mynewt
>          Issue Type: Bug
>      Security Level: Public(Viewable by anyone) 
>            Reporter: Marko Kiiskila
>
> I have 2 test i2c devices. I can do 'i2c_scan' on either, but will discover the device only once.
> On subsequent runs the device does not report being present. Should investigate if this is because a) the device itself refuses to respond or b) hal i2c driver on SAMD21 is faulty.



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