bug┬Áracoli - Bugs: bug #30246, Frame tx issue with SPI speed

 
 

bug #30246: Frame tx issue with SPI speed

Submitted by:  Joerg Wunsch <joerg_wunsch>
Submitted on:  Thu 24 Jun 2010 01:30:29 PM UTC  
 
Category: NoneSeverity: 3 - Normal
Priority: 5 - NormalStatus: None
Assigned to: NoneOpen/Closed: Open

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Fri 25 Jun 2010 09:11:14 AM UTC, comment #1:

One idea about controling the transmit start could be a radio parameter, e.g. RP_TX_PRESTART.

If the value is true, the frame transmission is started before the frame data are downloaded, otherwise the TX start command is issued after the download.

Axel Wachtler <awachtler>
Project Administrator
Thu 24 Jun 2010 01:30:29 PM UTC, original submission:

I've been stumbling across errors resulting in the first
frame being corrupted, which turn out to be caused by a too
slow SPI speed.

When using radio_send_frame(), the actual sequence of actions
used to transmit the frame is outside the control of the
users, so somehow, these SPI speed constraints have to be
handled.

I'm going to start a discussion on the mailinglist for this,
as there are several possible solutions, starting from just
documenting the constraints, down to attempts to automatically
select a different sequence of actions depending on the CPU
(and thus SPI) speed. This bugreport is meant as a placeholder
to keep until the issue has been resolved, one way or the
other.

Joerg Wunsch <joerg_wunsch>
Project Administrator

 

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