[time-nuts] THUNBERBOLT PACKET 0X8F-AB

[Didier Juges]

Hank,

You can look at the source code for my Tbolt Monitor to see how I dealt with
that. The link to the source code is in my wiki page:

http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:gps_monitor

Didier KO4BB 

> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf Of Hank
> Sent: Sunday, October 05, 2008 2:26 PM
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] THUNBERBOLT PACKET 0X8F-AB
> 
> Ed,
> 
> Got it....Found the spec !  Thanks for the hint !
> 
> Hank
> 
> 
> 
> "The bytes in the data string can have any value. To prevent 
> confusion with the frame
> 
> sequences <DLE> <ID> and <DLE> <ETX>, every <DLE> byte in the 
> data string is
> 
> preceded by an extra <DLE> byte ('stuffing'). These extra 
> <DLE> bytes must be added
> 
> ('stuffed') before sending a packet and removed after 
> receiving the packet."
> 
>   ----- Original Message -----
>   From: Hank
>   To: time-nuts at febo.com
>   Sent: Sunday, October 05, 2008 3:17 PM
>   Subject: [time-nuts] THUNBERBOLT PACKET 0X8F-AB
> 
> 
>   Ed
>   Per your message : That would be the 'byte stuffing' 
> inherent in TSIP packet structure.
> 
>   Packet 0X8F-AB is specified as being 17 bytes including the 
> subcode ( 8F)
>   Do you mean that you cant depend on that packet  always 
> being 17 bytes ?
>   I'm getting 18 bytes only when the time has 16 seconds in 
> it. ( the second byte is duplicated )
> 
>   If you cant depend on having a constant number of bytes ( 
> as defined in the spec ) , how do you then decode it ?
> 
>   Thanks
>   Hank
> 
> 
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