SAE communication standards

Thomas Moats opined in news: snipped-for-privacy@comcast.com:

Does it ever cease to amaze how many NEVER seem to have heard of a search engine?

Considering it is ALL over the first page of search results.

I still haven't found what I'm looking for. And I've search the web using google and other search engines. So I though I would break down and ask a question to you friendly people.

So if you know the web link please post it here. I'm looking for the protocol for J1850 for a Ford escort. And don't reply with the SAE website.

Thanks.

It never ceases to amaze me how many people NEVER read the whole message. Sorry had to get you back.

The communication package structure ..or Protocol commands things like that.

Yeah you stumped me on the "date" question.. and Yes I am.

news: snipped-for-privacy@comcast.com:

So you are unable to overcome a typo and not understand a sentence with one misspelled word, when the context of the sentence was clear?

What site did you find?

This section defines the requirements on the following Data Link Layer attributes:

a. Addressing Strategy b. Network Access and Data Synchronization c. Frame Elements and Structure d. Error Detection e. Error Response

Here is another small slice.

The general format is:

idle, SOF, DATA_0, ..., DATA_N, CRC, EOD, NB, IFR_1, ..., IFR_N, EOF, IFS, idle:

The preceding acronyms are defined as follows:

ftp://download.intel.com/design/intarch/papers/j1850_wp.pdf

I think this is as close as you are gonna get to Ford specifics on the net... Someone would have to be motivated to bootleg Ford's implementation, and why would they do that? Maybe 10 years ago.. now most see dollar signs.. same as you do.

Using the Intel specs and an OBDII scanner, you SHOULD be able to eventually back-engineer everything.

Unless you want even lower level stuf.. but they arent going to define commodity stuff like the CRC algorythm.. just show you what physical layer looks like.

Looks like bit definition is NRZ1, (Start of Bit=Transition).. sorta surprising to me but then I never messed with PWM.

cod opined in news:k7oNa.974$ snipped-for-privacy@ursa-nb00s0.nbnet.nb.ca: