[
https://issues.apache.org/jira/browse/MYNEWT-283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15261270#comment-15261270
]
ASF subversion and git services commented on MYNEWT-283:
--------------------------------------------------------
Commit 8ddc20eed045e5d9d0abe6b0bd5d6af83f872dcf in incubator-mynewt-core's
branch refs/heads/master from [~wes3]
[ https://git-wip-us.apache.org/repos/asf?p=incubator-mynewt-core.git;h=8ddc20e
]
MYNEWT-85: Fix BLE timing for start of connection events.
MYNEWT-283: Slave anchor point now set correctly on CRC error.
Please read the respective tickets for a discussion of
the changes.
> Slave is incorrectly adjusting anchor point if packet received with CRC error.
> ------------------------------------------------------------------------------
>
> Key: MYNEWT-283
> URL: https://issues.apache.org/jira/browse/MYNEWT-283
> Project: Mynewt
> Issue Type: Bug
> Components: Nimble
> Affects Versions: v0_8_0_beta2
> Reporter: William San Filippo
> Assignee: William San Filippo
> Fix For: v0_8_0_rel
>
>
> The anchor point of a slave may be incorrectly adjusted if a packet with a
> CRC error is received and the length is incorrect. The specification clearly
> states that the anchor point of the slave should be adjusted even though the
> frame is received in error; as long as you get the access address you should
> consider this a valid reception and adjust the anchor point. The
> specification also mentions (in other places) that the length field should be
> assumed valid even if the CRC is incorrect.
> The current code adjusts the slaves anchor point based on the received end
> time and the length of the frame when it really should capture the packet
> start time and adjust the anchor point in that manner. Most chips provide
> packet start time so the interface really should have used packet start time.
> The current PHY driver only marks the end time of the frame as it was assumed
> that you could always calculate the start time from the length. The PHY
> driver should be modified to capture packet start time either in addition to
> or in lieu of the end time.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
