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Old 03-02-2010, 10:46 PM   #901 (permalink)
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meelis11 -
Thank you again for your reply.
I do have a lot more I need to learn.
Hope you are staying warm in your country.
Thanks again!
Doug

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Old 04-07-2010, 05:03 AM   #902 (permalink)
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version 0.80 code indicating the average speed?
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Old 04-24-2010, 02:40 PM   #903 (permalink)
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Version 0.86 updates

software:
1. Metric options, litres, km, l/100km
Setup is still in english for simplified table of car values, metric display is option at end of setup (left + right buttons), will convert values to metric at display time if metric=1.
Uses Litres/Kilometers, and consumption is in Liters/100KM

Abbreviated Labels changes when in metric mode by screen:
Custon screen
MG->LK (Miles Per Gallon -> Liters per 100KM)
GH->LH (Gallons Per Hour => Litres per Hour)

Combo Screens:
IM->IL (Instant MPG -> Instant L/100KM)
CM->CL (Current MPG -> Current L/100KM)
TM->TL (Tank MPG -> Tank L/100KM)

Big number screens:
MPG->L/K (MPG -> L/100KM)

Trip screens:
MH->KH (Miles Per Hour -> KM per Hour)
MG->LK (Miles Per Gallon -> Liters per 100KM)
MI->KM (Miles -> KiloMeters)
GA-> L (Gallons -> Liters)

EOC/Idle screen:
G-> L (Gallons -> Liters)

2. Added another decimal place to the big numbers (more useable in L/100km mode)
i.e. it can display X.XX or XX.X or XXX depending how large the number is


hardware:
1. upgraded to atmega328.

2. switched to npn backlight driver, driven from vehicle voltage through a 1 watt resistor rather than regulator.
a. this allows the large capacitor to power the cpu longer in a power dip, since it doesn't try to power the backlight,
and the unit should survive power fluxuations better.
b. takes load off of regulator (the resistor does get warm).
c. makes it easier to relocate that source of heat and/or make it much easier to tie into existing dashboard dimmer circuit.

3. tied in the analog vss and vcc to facilitate analog inputs.

4. added pads for all unused pins (except reset), now experimetors can easily get to rx, tx, aref, 2 analogs and 2 pwm pins.

5. Turned down brownout detecton (we are not writing except at config)

6. Disabled self programming for stability.


framework:
1. using newer g++ for atmega328 compatibility, avr-gcc version 4.3.2 (adds a lot of bytes though)

2. npn backlight drive signal changes.

3. Replaced all arduino external function references with their avr counterparts or included functions. cpp file is now self contained and divorced from arduino updates and has smaller/faster performance.

4. updates to ubuntu build utilizing wine (was having to build on seperate windows machine and program on linux)

5. Experimenting with eclipse CDT w/avr plugin, still using external scripts to compile/burn, but eclipse editor is big improvement over notepad/gedit.

CPU Utilization = 49.86%, Free Ram = 1189 bytes, Free Flash = 13920 bytes

will update svn cpp and schematic when I remember how.

Edit, svn updated, here is latest source
http://opengauge.googlecode.com/svn/...no/mpguino.cpp


Previous Updates
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Last edited by dcb; 04-24-2010 at 10:56 PM..
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Old 04-25-2010, 01:59 PM   #904 (permalink)
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the scheme of the picture, just exchange one oscillator with 20MH and will run this code?

thanks
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Old 04-25-2010, 02:22 PM   #905 (permalink)
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That one looks kinda old, many changes since then. Current schematic is here:
http://opengauge.googlecode.com/svn/...no/mpguino.png
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Old 04-26-2010, 02:40 AM   #906 (permalink)
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Does these updates have any impact on compatibility with the MPGuino kit from Fundamental Logic?
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Old 04-26-2010, 07:06 AM   #907 (permalink)
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I have no clue what is up with the kit, there have been no communications in many many months.
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Old 04-26-2010, 10:03 AM   #908 (permalink)
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Forgive my boldness, but not understand.
Where can I find an explanation of the scheme?
What connects the points AR, A1, A2 TX RX PD2, PD3?

Thank you very much
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Old 04-26-2010, 10:06 AM   #909 (permalink)
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there is nothing connected to them unless you connect them I just brought them out in case anybody wants to experiment w/them, i.e. to try adding a throttle position or temperature reading or to try to control something (i.e. figure out a cruise control interface) or maybe someone just wants to tie into the tx port to log data.
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Old 04-30-2010, 11:23 PM   #910 (permalink)
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I have a question about the DIY MPGuino. Is it possible to utilize two 8x2 or 10x2 displays instead of the 20x2 display we have in the pre-built? I ask because I wanted to use an 8x4 but I cannot find one. This size would better fit where I want to post the MPGuino in my truck. All that said, even with only the fuel flow and my vacuum gauge, I can already tell differences in FE as I change my driving habits...

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