160 baud reading

[Louis Baiani]

I sent this to Peter Gargano.  Any info from someone using his software
on an ECM outputting TTL levels is greatly appreciated :O)

Hey Peter, I was trying to read the data stream off the Corvette with
the adapter I made for the CLCC Buick (12V PWM).  I used the data in on
the RS-232 like in the secondary diagram.  First trying to use the same
timing option that I used with the Buick, I saw 5 or so rows fill up
with data  - say at a rate of just a bit over 2 columns/sec.  - Now, I
tried adjusting that rate, and basically I have not much luck, either I
get more or less columns, but nothing over 5-6 or so.  Also, I notice
the last row that is getting filled is data that is always changing
values - the others stay at 0 I believe, or something fairly constant.
Any suggestions?  Think this is a software or a hardware issue?  The ECM

is outputting TTL logic in this case.  I should scope the output going
into the RS-232.  This weekend comming up, should I log some information

with a terminal maybe?  Has anyone tried the adapter and software with
ECM's that output TTL?

Louis



----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org