RE: CAN bit timing synchronization question

You basically answered your own question :). Stuff bits are there to ensure that there are sufficient edges in the frame to perform synchronization.

 

cheers,

Bram

 

From: [email protected] [mailto:[email protected]] On Behalf Of Tamás Fekete
Sent: zondag 13 november 2016 15:58
To: [email protected]
Subject: [CANLIST] CAN bit timing synchronization question

 

*snip*

 

So I think I understand the first point, which means that the start of frame bit has to start with a recessive to dominant transition, and that is a reference point for the receiver to start counting the bit times.

 

I have trouble with the second point. Why would there be a bit edge when for example I am transmitting two ones after each other? So how does it know that there was supposed to be a bit edge there? Or is this why the protocoll stuffs an extra different bit when there are too many same consecutive bits on the line?

 

Any help is appreciated,

Fekete Tamás (Tamás=Thomas in english)