Reading ALDL 8192 stream from '165

[Ludis Langens]

Craig Moates wrote:
> 
> Depending on whether the key is on, engine running, etc. I get
> different-looking data at 160 baud communications speed through the MAX232
> with 10kohm across the A-B.

Check this link for info about the 160 baud ALDL
  http://www.isthq.com/~dan/aldl.htm


You should be able to read the 160 baud data through the serial port,
but not with the serial port running at 160 baud.  Instead, set the baud
rate to something around 2000-3000 baud.  You should receive one byte
per ALDL bit.  A byte with a long run of low order zeroes is one bit
value, a short run of zeroes is the other value.  You'll have to extract
the data packets from these bytes.  Each data packet should be received
as 234 bytes.  Your postprocessing will reduce that to 25 real bytes.

-- 
Ludis Langens                               ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/