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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MYNEWT-85) Transmit timing for certain BLE transmissions may not meet the specification.
Date Tue, 03 May 2016 21:30:13 GMT

    [ https://issues.apache.org/jira/browse/MYNEWT-85?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15269628#comment-15269628
] 

ASF subversion and git services commented on MYNEWT-85:
-------------------------------------------------------

Commit 7a11762e2267a3304bfbfdd611cc463f956fe47c in incubator-mynewt-core's branch refs/heads/develop
from [~wes3]
[ https://git-wip-us.apache.org/repos/asf?p=incubator-mynewt-core.git;h=7a11762 ]

MYNEWT-85: Transmit timing fixes
MYNEWT-99: Encryption.

This is a fix related to the above commits. The code was not
properly calculating the receive end time of the frame if
the frame was encrypted.


> Transmit timing for certain BLE transmissions may not meet the specification.
> -----------------------------------------------------------------------------
>
>                 Key: MYNEWT-85
>                 URL: https://issues.apache.org/jira/browse/MYNEWT-85
>             Project: Mynewt
>          Issue Type: Improvement
>          Components: Nimble
>    Affects Versions: v0_8_0_beta1
>            Reporter: William San Filippo
>            Assignee: William San Filippo
>            Priority: Critical
>             Fix For: v0_8_0_rel
>
>
> Although the unplugfest went well in this regard, it could have been because we "exaggerated"
the amount of clock drift. The current BLE controller code does not use an output compare
to transmit a BLE frame at a specific time. This could cause the transmission to occur outside
the BLE specification. The code should be modified to use the BLE transceiver HW to enforce
more exact transmission timing.



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