View Single Post
Old 03-05-2011, 07:29 AM   #4436 (permalink)
EcoModding Apprentice
Join Date: May 2009
Location: Australia
Posts: 109
Thanks: 0
Thanked 2 Times in 2 Posts
An un-terminated serial lead causes spurious errors....
Is it
a) Working as an antenna and introducing noise to the ground plane? or
b) Introducing noise to the serial comms data lines?

We are talking about an electrically noisy environment after all.

If it is (a) then maybe some decoupling is required around the electronics, a quick look at the schematic shows me that there is some decoupling, a good thing particularly around logic chips.

If it is (b) parity checking or crc check coding should eliminate errors, that is any message that fails an error check should be discarded.....

It is a curly problem, anyone else got some ideas?
I would be looking for a solution, if it happens with the lead attached there is every chance that it can happen under some other circumstance.
  Reply With Quote