Carbytes (was: scan tool progresss)

[Bill Shaw]

I've just started playing with Carbytes also,  so I'm no expert.  The first byte in the packet ($F4) is the destination address on the ALDL bus.  $F4 works for the 8051,  but I have to change it to $F0 for the '749.

I still have trouble connecting reliably with the '749.  I'll click on the aldl button 6-8 times to transmit the data request packet  ($F0, $00, $02) and it'll return the chatter packet ($F0, $55, $bb),  the 9th or so time it'll return the 63 byte data
packet I'm looking for.  I can click a few more times and get the data packet,  but it seems to loose sync and revert back to the chatter packet pretty quick.

Bill

Mike Rolica wrote:------------------------------

>
> well after hours of dicking around.. got some communication with car
> bytes...
> seems the ald i downloaded off of the ftp is not so hot...
> or i'm doing something wrong.
> when the ecm is sent
> $f4,$57,$01,$00,$b4 (is the third part in the macro
> i get a jump on all my graphs (and ar accurate) for a sec.. if i put repeat
> to 100 or so, i can get a bunch of jumps..
>
> yet when in devices, listening to chatter there is nothing
>
> help me please:)
>

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