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Help needed, communication with MicroSquirt has stopped

Posted: Sat Mar 19, 2011 8:48 pm
by nlanfran
Hi all, first off, I've searched the forums and done all the troubleshooting from online documentation, so I hope I'm not reposting an old question, if I am, please direct me to the right thread, thanks!

I'm on a student engineering team and we have a 50cc Honda engine, using MicroSquirt to control a fuel injector. Up until a couple weeks ago, MS worked fine with our Linux laptop, but suddenly stopped communicating with MegaTune. MicroSquirt still senses the TPS and CPS and injects when we run the engine, but no comm with the computer can be made.
So far I've reinstalled Linux, WindowsXP, tried different computers, used serial-to-usb and pure serial, all to no avail. Right now I'm using a WindowsXP desktop with a serial port. I've downloaded the the 2.890 .ini file and activated it. The settings for the serial port are all correct.

I've uploaded a screen shot of the Port Checker, the error that pops up when I try opening MegaTune, and the error that the Dowloader gives when I try to rewrite the software to MicroSquirt.
As far as I can tell from testing, the cables and computers work fine, we are wondering if maybe MicroSquirt is fried, but that would be strange since it stills runs the engine.
With a competition coming up soon, we're hoping to get our engine tuned, any help is greatly appreciated!

Thanks!
portchecker.bmp
Connecterror.bmp
downloader error.bmp

Re: Help needed, communication with MicroSquirt has stopped

Posted: Mon Mar 21, 2011 5:06 am
by Matt Cramer
That screen shot shows COM1 echoing back the characters being sent. Does it still do that if you have the serial cable connected to the PC but not the MicroSquirt?