Hijacking OEM hardware

[Webb]

Sandy -

    The only reason I looked any farther than the '332 project
was that I couldn't get one. Has that changed? It still looks
attractive. If we have availability (or can get it) I'd still
switch - I really do like motorola stuff better.

If there is something specific that needs to be done, I'll
consider it if the parts are around.


Ron Webb



Sandy wrote:

> At 11:09 PM 9/26/97 +1200, you wrote:
> >
> >> As far as a '552 not being powerful enough, I disagree
> wildly!
> >
> >I guess that since the '552 was designed for exactly this
> application,
> >someone thought it was suitable.
> >If you go way back, there was a lot of discussion on what to
> base the
> >EFI332 project on.
> >IIRC, GNU tools was one major advantage. The other was that
> everybody
> >wanted to do something different and the CPU32 core plus the
> TPU would
> >leave a whole heap of CPU left over for monitoring and
> experimenting. That,
> >and the fact that the people that actually got off their butt
> and did
> >something, were of the '332 camp. :-)
>
> I hear that, again, I will not do any other work until the I/O
> get tested,
> as I really hate wasted time. Again, we can get to where we
> want, but more
> people need to get involved besides the few that have done so
> up until now.
> As far as the 552 saga goes, it wouldn't matter what we used,
> as we would
> still be discussing instead of doing. My capabilities and time
> are limited,
> I would like to get back into the 332' mode, hopefully next
> month will be a
> good start. I have been on the road for 3 weeks, almost solid.
> So not much
> time to do EFI stuff. My goal, again, is to complete the SINGLE
> BOARD
> version. I have most of the circuits done, and just need to do
> a bit of
> cleaning and then the layout.
>
> Maybe this will help get some things going -
>
> Single board specs -
>
> MC68336/376/396 CPU so you can do the CAN Interface, FLASH,
> built in 10
> Channel A/D, 7K RAM, Potential for flash if MOTO releases the
> 396 - SEE
> MOTO's website for 336 and varients.
>
> Single Chip 16 Bit Flash and Ram Devices
>
> Similar Crank/Cam Interface as existing I/O (LM1819)
>
> Similar A/D 4 Channel Buffer as existing I/O (LMC6494)
>
> Similar Octal Out as existing I/O (MC33298)
>
> Interface to the CAN buss (82C250)
>
> 2-10 AMP protected High Side Drivers (IR6210/IR6216)
>
> 1 3 AMP protected High Side Tach (AUX) Driver (IRSF3021)
>
> IAC (May Get Axed in the design, drive parts are expensive,
> hard to get)
>
> The only area in question is the drivers, as I was going to use
> the nice
> LM1951's for High impeadance injector drivers, but their
> avalibility is
> limited. I just got the IRSF3021's (3 amp protected switch) and
> will build
> a sample driver with the SMD parts and see if the work. If they
> do, and can
> take the 'heat', that will be the driver, small, and short
> proof.
>
> In anycase, 12 drivers will be ON THE BOARD. Use as high
> impedance driver
> for 1-12 Cyls, or use as drivers for the subdrv board for
> driving coils or
> low impedance injectors.
>
> Again the circuit layout for all of the above is done, except
> for the 12
> injector drivers. I will be doing the PCB as a 4 layer board at
> the
> suggestion of many folks, so the PCB will hopefully be better
> suited to the
> harsh noise we encounter. An most all components will be SMD.
> Don't worry,
> most look like they can be soldered, except for the CPU and
> Memory. The
> target size of the PCB will be the size of an airplane barf bag
> (think
> about why, re-read start of post).
>
> That is, again the status of where I'm at. I will not go much
> further (or
> tell anyone that if do) until the Crank/Cam interface gets some
> testing as
> well as other areas of the I/O board. I currently have several
> hundred
> dollars in the proto PCB's not to mention the parts.
>
> >From the software standpoint, I have been hacking uC/OS, and
> am pretty
> close to making that work. If I do, it will be an easy
> alternative to using
> GCC and RTEMS if anyone wants to. I'm using SDS crosscode (Real
> paid for
> version), but SDS has the complete 7.X system for use on their
> web,
> limitation on the number of linked files, but that is easy to
> work around.
>
> That's the end of the soapbox stuff, now as the now cancelled
> talk show
> host said 'Let's get busy'
>
> Sandy