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RE: Re: [Paparazzi-devel] LEA-5H Module Freeze after 30 seconds

From: David Carr
Subject: RE: Re: [Paparazzi-devel] LEA-5H Module Freeze after 30 seconds
Date: Tue, 22 Apr 2008 12:18:33 -0500
User-agent: RoundCube Webmail/0.1-rc2


I had a LEA-5H mounted on a Tiny 2.11 ordered by one of my customers.  I
didn't notice any lockups in the tunnel mode of operation.  However, the
current draw was higher and and the performance was not all that much
different from the LEA-4H that I ship standard.

The migration guide does outline some pinout issues and software changes.

Best of luck,
David Carr

Assembled Paparazzi Boards

On Tue, 22 Apr 2008 10:02:44 -0700, address@hidden wrote:
> David, The issue of UTM has nothing to do with NMEA vs. UBX
> protocols.� Also the 30 second time out has nothign to do with the
> LPC side of the tunnel.� The LPC does just that, tunnel data.�
> Nothing else is running(no airborne software or GPS code).� I thought
> I read somewhere that the 5H chips had somethign different with the
> pinout.� Im guessing not.� I dont have time right now to look through
> that link Martin posted, but maybe it has the answer. 
> AJ � PS.� There is an NMEA parser out there, someone on the list has
> it.
>  -------- Original Message --------
> Subject: RE: Re: [Paparazzi-devel] LEA-5H Module Freeze after 30
> seconds
> From: 
> Date: Tue, April 22, 2008 9:58 am
> To: 
> Hi Martin,
> Very good to know. Maybe Paparazzi does something with this at 30sec
> and freezes the tunnel and not the LEA-5H freeze? I just saw u-center
> stop responding but that could have been the LPC freeze not the
> LEA-5H. 
> This is a good example where not having the option in software for
> NMEA is going to be a problem. LEA-4P will not be available forever.
> This is why I chose to test the LEA_5H.
> Can I help in some way? 
> David Conger
> From: Martin Mueller 
> Date: 4/2  2/08 16:19Subject: Re: [Paparazzi-devel] LEA-5H Module
> Freeze after 30 seconds
> Hi David,
>> On the downside. After many tests it freezes exactly 30 seconds
> after power on every time. It exactly 30 seconds every time. I did
> many tests to be sure. 
>> Also, it will freeze instantly upon dong any "send" command. Change
> any setting and hit "send" it will lock up. 
>> Any ideas? This module is amazing. Compared to an LEA-4P it seems a
> huge leap in sensitivity...there's just this little issue of only
> working for 30sec to overcome ;]
> the 4->5 migration application note 
> [2] says that
> the 
> current LEA-5 software has "No UTM (Universal Transverse Mercator 
> Projection)." This is probably not related to that 30s issue but
> means   
> that we need some conversion for Paparazzi.
> Martin
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