On Dec 14, 2012, at 7:04 AM, Electron wrote:

> I rediscovered an ancient, existing, protocol:
> SOH, data (eventually DLE), EOT, and finally CRC

That doesn't give you error correction by itself=85

I be tempted to use the Async HDLC used as the bottom layer of PPP.
There's a "reliable mode" for it; I don't know how well it works or how eas=
y it is to implement.
The async HDLC is supported by a number of "smart" uarts.

Note that there are limits on the packet length that a given-sized CRC is c=
apable of protecting.

BillW


--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.