The MegaSquirt Project has experienced explosive growth other the years, with hundreds of new MS installations occurring every week - a phenomenal success! MegaSquirt has been successfully used in all aspects of Internal Combustion engine applications including R&D, Industry, Race, and Research. The MS project has transformed itself from a simple R&D project into a full-featured mature engine control system. To reflect this the support structure has also changed to meet the needs of MegaSquirt Users.
Moving forward, the R&D forums for MegaSquirt project are in a read-only mode - no new forum posts are accepted.
However the forums will remain available for view, they still contain a wealth of information on how MegaSquirt works, how it is installed and used. Feel free to search the forums for information, facts, and overview.While the R&D forum traffic has slowed in recent years, this is not at all a reflection of Megasquirt users, which continue to grow year after year. What has changed is that the method of MegaSquirt support today has rapidly moved to Facebook, this is where the vast majority of interaction is happening now. For those not on Facebook the msextra forums is another place for product support. Finally, for product selection assistance, all of the MegaSquirt vendors are there to help you select a system, along with all of the required pieces to make it complete.
A forum for discussing the creation, modification, and loading of embedded code for B&G MS-I/MS-II.
Forum rules Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
Can't understand how to upload code without Stim.
What does it mean "Power Up" or "Power Down" MegaSquirt® EFI Controller without Stim and without car?
Can I upload code at home (without car)?
Is it possible?
MS Code Update utility wrote:
For pre-Extra MS-II:
1) Short the "B/LD" jumper on the MS-II board.
2) Power cycle MS-II.
3) File->Open.
The stim is a convenient way of powering the MS out of the car. If you wish to power the MS without a stim, you'll need to make up a power lead using a DB37 connector - or solder tails onto the back of the MS one.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
trakkies wrote:The stim is a convenient way of powering the MS out of the car. If you wish to power the MS without a stim, you'll need to make up a power lead using a DB37 connector - or solder tails onto the back of the MS one.
Do I need to power +12V to pin #37 on DB37 connector?
And ground to the case?
trakkies wrote:The stim is a convenient way of powering the MS out of the car. If you wish to power the MS without a stim, you'll need to make up a power lead using a DB37 connector - or solder tails onto the back of the MS one.
Do I need to power +12V to pin #37 on DB37 connector?
And ground to the case?
I don't want to be rude, but are you sure you're up to this?
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
To power up MS2 in the house, you need to find the +12V battery pin and battery ground pin on the MS2 DB37 connector(see schematics in megamanual) and attach a wire to each of these pins and plug the other ends of the wire into a 9 to 12V battery or a 12V walwart (better) or other DC power supply. Using the stim you just plug its DB37 into the MS2 DB-37, then on the stim there is a small block terminal with +12V and Grnd. That is what makes it easy. You just shove a wire in each terminal and tighten the screws, then the other ends go to a battery or P/S. Plus it has the advantage that you can simulate your engine and be sure your setup works. Better to find your PW is 32 ms at 600 rpm on the bench than flooding your engine.
Once you have that hooked up you run a serial cable from laptop to ECU, just like in your car. You "power up/ down" by unplugging the walwart/ power supply/ battery then reconnecting. You have to do this because when the ECU comes up it looks for the bootload pin state and if it doesn't find it set for booting it goes permanently into engine run mode. To get it into or out of bootload you need to power up/ down.
The ECU has several extra ground pins - pins 1, 2, and 7 through 19 are
all grounded to the same point. As long as 5 or more are grounded, it
doesn't matter which pins you use.
