A protocol is a ruleset for formatting and exchanging messages.
Questions tagged [protocol]
301 questions
13
votes
2 answers
Rolling Code Explanation
Could somebody explain how rolling code protocols such as KeeLoq work? I understand the basic premise that they use a different code each time so you can't just use replay attack, but I don't understand how one side verifies the correct code etc.…
NickHalden
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J1939 Protocol?
I'm working on the J1939 PGB protocol.
In this protocol I didn't understand the word "parse PGN"
If any one can know about It then It will be very much helpfull for me.
Thanks In Advance.
Gouse Shaik
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1 answer
Sliding protocols c code explanation?
While studying the Go back n protocol,in a part of the C code its written :
static boolean between(seq _nr a, seq _nr b, seq _nr c)
{
/
* Return true if a <= b < c circularly; false otherwise.*/
if (((a <= b) && (b < c)) || ((c < a) && (a <= b)) ||…
user3543012
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4 answers
Maximum frame sequence number in sliding protocols
I am reading about sliding protocols and in almost every book its written this:
Frames have sequence number 0 to maximum \$2^n - 1\$.
Why is the maximum \$2^n-1\$?
user3543012
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0
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1 answer
Choosing wiring & protocol for MCU network
I need to create a mini wired network of MCUs. I already have custom application layer protocol and need to send messages of this format between MCUs.
My requirements are:
Up to 20 units in the network.
Distance between nodes up to 20m (ideally) or…
ambienthack
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0
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1 answer
J1939 - CAN BUS - What is ECU and ACU?
I have a question about the CAN-bus protocol J1939.
What is ECU and ACU?
Assume that we have three motors that can be controller via J1939. Each motor have it's source address 0x80, 0x81 and 0x83 and destination address 0x22, 0x23 and 0x24.
So what…
euraad
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Whats Reliable Burst Protocol(RBP)?
I couldn't find much details about this protocol than an IEEE paper which I couldn't download. Any quick comments on this?
achoora
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Local Interconnect Network(LIN) default status
How does slave identification takes place in LIN protocol by the master ?
What is the default status of a LIN bus ?
How are collisions avoided in LIN ?
What is the role of Sporadic frame ?
Anjaneyulu
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2 answers
Open Source version of MOST?
Is there an open source version of the MOST protocol?
From the above link:
MOST (Media Oriented Systems Transport) is a high-speed multimedia network technology optimized by the automotive industry. It can be used for applications inside or…
Prof. Falken
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