Packet protocols

Simple or more advanced packet protocols

Byte stuffing protocol

A fully functional prototype in C here

It does not take into account

• timeout in tx and rx due to tx rx buffers stuffed

  • maybe just wait a litle time

• no error checking

  • you have to add this by your self

• No limit on how much you will receive before stopping before received end-of-fra,e symbol

• Maybe an idea to reset receive if we do get a start-of-frame when we are looking for stop

  • v 0.13 now has user setable number of restart before giving up in rxPkg

• maybe much more

Cobs

• A very nice protocol with only 1 byte overhead in stuffing

• Limitation on packetlength (opup to 253 ot 254)

• You need to have whole data before encoding in the cobs packet

look here cobs.html

maybe more to come

Code

Code examples Src folder list: here

“THE BEER-WARE LICE NSE” (Revision 42): jensd@jensd.dk wrote this file. As long as you retain this notice you can do whatever you want with this stuff on these pages. If we meet some day, and you think this stuff is worth it, you can buy me a beer in return :-)
(C) Jens Dalsgaard Nielsen
credit for license this goes to phk@FreeBSD.ORG