MpGuino keeps resetting. - Page 2 - Fuel Economy, Hypermiling, EcoModding News and Forum

ptsmith24 · 10-09-2008, 06:52 PM

Quote:

Originally Posted by bbjsw10

Changing this brownout voltage, means what? That it will retain memory upon a brownout?

How do you make this parallel programmer, I have cords and extra sockets for the 128.

5 second search.

Arduino - Bootloader

Arduino - Programmer

Arduino - ParallelProgrammer

Start with the last one. Seems to have a good tutorial for what you're doing.

dcb · 10-10-2008, 12:29 AM

The parallel programmer hardware is super simple, I cut the end off an old parallel cable and mapped wires to pins with the ohmmeter, then added a bit of hard drive connector/resistors/etc. There is a giveio utility that needs installing on windows too.

cmags · 10-10-2008, 12:32 AM

I'll see if i can dig up a parallel port connector tomorrow/this weekend and try this out. I know I have everything else needed.

bbjsw10 · 10-10-2008, 12:53 AM

Quote:

Originally Posted by dcb

The parallel programmer hardware is super simple, I cut the end off an old parallel cable and mapped wires to pins with the ohmmeter, then added a bit of hard drive connector/resistors/etc. There is a giveio utility that needs installing on windows too.

Yeah I made mine the same way tonight, but will not do bootloader. I installed giveio.sys onto Xp and still nothing, it keeps saying "Mismatched microcontroller are you sure you selected the right board" or something like that. It is on Arduino Decimilia.

Oh and made my Guino display "1991 Metro Xfi MPG Gauge" tonight, instead of the normal startup.

cmags · 10-10-2008, 12:56 AM

Quote:

Originally Posted by bbjsw10

Yeah I made mine the same way tonight, but will not do bootloader. I installed giveio.sys onto Xp and still nothing, it keeps saying "Mismatched microcontroller are you sure you selected the right board" or something like that. It is on Arduino Decimilia.

Oh and made my Guino display "1991 Metro Xfi MPG Gauge" tonight, instead of the normal startup.

I'll let you know how I fare when I give it a shot.. hopefully tomorrow or Sat morn.

Cool mod, but hopefully after we get this reset issue fixed, we'll never see the MPGuino splash screen again anyway...

ptsmith24 · 10-10-2008, 08:28 AM

Couldn't you change the splash screen to come up at the first signal after the 7 minute timeout?

Magister · 10-10-2008, 09:55 AM

I change the diecimila.bootloader.high_fuses=0xdc value, this is the board I select in the IDE (I have a Freeduino Serial 2.0) then burn the bootloader with the parallel programmer and it worked...
My parallel programmer looks like the one on the Arduino web page, a DB25 with 5 wires and taped plugs at the end

Changing the value means the chip monitors the voltage and if it goes below 4.7V, the chip will reset instead of continuing to operate (and do strange stuff).

Also it seems the problem comes not at switch off, but when you switch on, meaning that when you power up, the chip will start to execute code when voltage was greater than 2.7V which is too low for 16MHz, see chip spec in the PDF.

bbjsw10 · 10-12-2008, 01:43 PM

Well I replaced my 100k resistors on the signal wires with 220k. Now to check to see if it works or not.

cmags · 10-12-2008, 05:18 PM

I haven't been able to find time to get into the thing, but I did notice that my VSS dropping out seems to be correlating with temperature. I'm going to add vents and a fan. I'm also going to add a power conditioning circuit to the input. And I'll try the bootloader mod too. I hope that nails it because I'm out of ideas after that...

Also, I had more problems when I had an additional 50k on my VSS line, tho it's doing well with the INJ line. Let us know how the 220k works out...

bbjsw10 · 10-13-2008, 08:50 PM

Well it is still resetting on 220k, I believe it is from the injector pulse though. I noticed today I could duplicate it when bump starting car. I just had to do a failed bump start and it would lock/reset.

I have my vss and injector hooked to ecu wires (soldered them) Is there a buffer in-line possible before the injector and I just tied in too early in the harness?

The thing is I could probably drive 1k miles with it, if I never P&G-ed. It has been operating great while driving normal, I EOC when I P&G. That is the only time this does act up. And once it has a reset a few times, it tends too lock up. When it does lock up maybe 25% of the time the defaults and all messed up. I think it is from resetting and running bad code and going nuts from there.