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Question linux and the 944

being the linux/computer dork that i am, and having seen linux put on everything from a watch to a x-box ect. has anyone made their 944 run linux???
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Special Edition 924S 1988 <- SOLD!

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Old 02-08-2004, 08:02 PM
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I wanna know too. yaay for linux
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Old 02-08-2004, 08:22 PM
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Open Based ... Nice!!!
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Old 02-08-2004, 09:05 PM
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Last edited by kraft; 02-16-2004 at 09:09 AM..
Old 02-08-2004, 11:46 PM
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I am all for the idea too!
Old 02-09-2004, 08:05 AM
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thats cool as hell but i was actually talking about it being like the DME. would you be able to hook it up to where it actually controls air/fuel maps and other stuff?
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Old 02-09-2004, 08:07 AM
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Umm... well yes and no.
You would need some kind of external controller, like an OOPIC or something, because there is data coming in on too many pins, the controller could convert all the incoming data (with the help of an analog-digital converter), and turn it into a serial stream, which could enter on a serial port of any computer. Then you could write a program to interpret this data, and send signals back out, through the oopic and back to the engine. However I fear that the lag time of all these processes will be too much, and you will have to allow for some guestimating, which will lead to decreased performance.
Plus, if you computer ever slows down just a little, it could stall your car.
that is, don't use it to control your sound system too, lol.

However, the idea itself is pretty cool, but I would feel better programming an OOPIC to run the engine, than trying to interface to a PC.

I suppose you could skip using an external controller, but you would have to use multiple ports, and use an analog-digital converter. Along with many transistors to turn your +5V into a +12V, or a switched ground for the coil, etc...
But, that would allow for some pretty cool anti-theft systems.
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Old 02-09-2004, 08:46 AM
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would it be possible to burn linux directly to a chip so it runs your DME?
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Old 02-09-2004, 08:57 AM
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Last edited by kraft; 02-16-2004 at 09:10 AM..
Old 02-09-2004, 08:58 AM
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Quote:
Originally posted by scheistermeiste
would it be possible to burn linux directly to a chip so it runs your DME?
in my opinion everything is possible the question then is to know how many time/people/money it would consume for a year to develop something like that.
It would certainely be more accurate and fast in data treatment than a simple 80C51 or Z80 when i see some pocket pc but playing in this game it's only for big boys with big money more than i will ever have.
Old 02-09-2004, 09:14 AM
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I'm writing a program right now that takes a stream of data from the Weather Service's satellites, down to our dish, to the demodulator, to the serial port. Serial IO isn't that hard in Java... the hardest part for this project was finding the beginning/end of each packet. If the DME sends a pulsed signal, i can't imagine it being very hard. The hardest part would be making sure you have the exact right formulas or interpration logic. The smallest error in there could potentially cause a ton of damage.

I'd be willing to expirament if anyone has info on pinouts.
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Old 02-09-2004, 01:47 PM
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I was trying to make a data logger for the 944 DME, the problem I ran into, is you have to solder a wire into the DME to send it data, and it has a bitrate of 93750, which is very difficult to translate into something usable.
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Old 02-09-2004, 06:53 PM
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so did you come up with anything on the datalogger idea or abandon it for now?
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Old 02-09-2004, 08:28 PM
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i love linux!
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Special Edition 924S 1988 <- SOLD!

Asking if you should replace that timing belt is like asking if you should re-use a condom that may have in hole in it with a hooker.
Old 02-09-2004, 10:21 PM
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Last edited by kraft; 02-16-2004 at 09:11 AM..
Old 02-09-2004, 10:25 PM
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mmhh it seems that the error memory works only with from 1988 ECU
Old 02-10-2004, 04:32 AM
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kraft...vous etes un connaiseur d'electroniques, no? Tres bien!
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Old 02-10-2004, 05:07 AM
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man, that's a really high bitrate. I'm not sure how you'd deal with that.
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Old 02-10-2004, 05:37 AM
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kraft...vous etes un connaiseur d'electroniques, no? Tres bien!
Lol no i'm not, i whish, but i'm not...only trying to do with the little i know.
Old 02-10-2004, 07:02 AM
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Last edited by kraft; 02-16-2004 at 09:11 AM..
Old 02-10-2004, 07:12 AM
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