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Old 09-02-2008, 09:45 PM   #581 (permalink)
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Sanguino uses ATmega644

Quote:
Originally Posted by Clev View Post
Ah, excellent. Looks like a drop-in upgrade (physically, anyway) that doubles the EEPROM, SRAM and FLASH. I'll go ahead and order the Arduino with that possibility in mind.
http://sanguino.cc. Says it's Arduino compatible (with minimal changes) but 64K Flash, 4K RAM, 2K EEPROM.

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Old 09-03-2008, 07:17 AM   #582 (permalink)
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Quote:
Originally Posted by rmccomiskie View Post
http://sanguino.cc. Says it's Arduino compatible (with minimal changes) but 64K Flash, 4K RAM, 2K EEPROM.
It's compatible from the standpoint of sharing the AVR instruction set...
It's not pin-compatible or 100% code-compatible, so if you build something around it, everyone else has to have that exact same setup. At least with ATMega328, it's a pin-compatible part, so I/O mapping is identical, and people can just solder one of those into their Arduino instead. Modifications to the software are also fairly minimal.
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Old 09-03-2008, 08:38 PM   #583 (permalink)
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Quote:
Originally Posted by forgottenmindset View Post
Thanks, that's a great idea, I'll try it


Please optimize this if you can, it uses lots of memory


Code:
void doDisplay0_60() {

  
} // end doDisplay0_60
There, optimized.

Seems to me that in a device to help enhance MPG, it is counter-productive.

I am tweaking it... more later.
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Old 09-03-2008, 11:49 PM   #584 (permalink)
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How about a function in mpguino speak to do the following?


http://ecomodder.com/forum/showthrea...html#post43371
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Old 09-04-2008, 12:49 AM   #585 (permalink)
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Well, I looked at the code. Not that much to clean up. I squeezed about 24 bytes out. (String outputs.)

The cDA/cRR would be interesting, but how often would you use it? I could see making a separate program that would run in the same hardware setup (write down the hard earned variables for your car first.) That could do more diagnostic things like 0-60 and cDA/cRR that may be more memory intensive. Perhaps adding in a neutral sensor (auto), or clutch sensor (manual) and work out effectiveness of pulse and coast over a trip.
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Old 09-04-2008, 01:23 AM   #586 (permalink)
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Quote:
Originally Posted by ac7ss View Post
The cDA/cRR would be interesting, but how often would you use it? I could see making a separate program that would run in the same hardware setup (write down the hard earned variables for your car first.)
You are probably correct, I, or someone, should just hack the current program into a standalone cda calculator you can load when you need it. The current setup includes weight and vss pulses, inj, etc, and it will still be in the eeprom when you load the cda program.
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Old 09-04-2008, 02:19 AM   #587 (permalink)
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Quote:
Originally Posted by dcb View Post
You are probably correct, I, or someone, should just hack the current program into a standalone cda calculator you can load when you need it. The current setup includes weight and vss pulses, inj, etc, and it will still be in the eeprom when you load the cda program.
As somebody mentioned, there is a new ATMega coming out soon that is Arduino/ATMega168 compatible, but with double the RAM, FLASH, etc. It will be a drop-in replacement (so socket your chip if you can!), so I'd prefer to concentrate on MPG-related functionality in this version, and then expand later when the more powerful chip becomes commonly available.
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Old 09-04-2008, 08:47 AM   #588 (permalink)
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Yup, I am pretty much against the wall on space and too lazy to optimize it at the moment.

Kevin (iduino guy) has put an arduino ide together that supports the atmega328, but I'd like to see it merged into the main arduino release, and there are a lot of 168s out there still.

I think if we can get the bouncy speed reading on the metro solved and integrate it into a smooth instant mpg reading, we can call it 1.0 and ear mark it as a 168 compatible version. Then target the 328 and the bells and whistles (Miles spent EOCing, gallons spent idling, minimums and maximums, etc.
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Old 09-04-2008, 12:39 PM   #589 (permalink)
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Quote:
Originally Posted by Yoshi View Post
FYI,
Following is VSS information for most vehicles at Rostra Precision Controls site.
For 1986-1995 model year vehicle
For 1996-2008 model year vehicle

Yoshi
And here is a link that I found about injector flow rates. Look up your car to get the fuel injector part number, then look up the that number in the flow rates section.

Motor Man Fuel injector Websites sell a full line of Automotive Fuel Injectors @ wholesale prices & no core charges or core returns due back.

I also made a little spreadsheet where you enter the lb/hr or cc/min and number of injectors, and it gives you microseconds/gallon.

Both good for initial values on the mpguino.
Attached Files
File Type: xls FuelFlowRate.xls (13.5 KB, 1038 views)
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Last edited by wagonman76; 09-04-2008 at 08:32 PM..
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Old 09-04-2008, 02:09 PM   #590 (permalink)
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Quote:
Originally Posted by wagonman76 View Post
And here is a link that I found about injector flow rates. Look up your car to get the fuel injector part number, then look up the that number in the flow rates section.

Motor Man Fuel injector Websites sell a full line of Automotive Fuel Injectors @ wholesale prices & no core charges or core returns due back.

I have a little spreadsheet I made at home (Ill post it then) where you enter the lb/hr or cc/min and number of injectors, and it gives you microseconds/gallon.

Both good for initial values on the mpguino.
Thanks for posting that. The VSS links didn't have information for my car (I do need to compare motors with the listed models and see if I can draw any conclusions, though). The injector flow rate was listed for my car. Hopefully I'll have my car set up by this weekend and can get it pretty accurate fairly quickly.

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