On 22/06/2012 12:11, Horst Rupp wrote: > When soldering up my level shifters, I fortunately did build a couple of > them, not only the two needed for the IOIOBox.
> With a substitute level shifter my freeze-up problem becomes much more rare. > Beforehand I had a freeze-up within minutes to 2 hours after starting the > communication. Now, with another level shifter, the interval is 8 - 10 > hours. > These are cheap level shifter, bought on-line for less than 6 Euro. I have also built a level-converter circuit using a low cost IC. See http://xcsoar-i24.wikispaces.com/multi-channel-android-usb-serial-ioio-adaptor And I have also experience stability issues with the IOIO board. However I have found: - If I connect my B500 alone, it is 100% stable. - If I connect Flarm alone, it fails after about an hour. - If I connect both, + Flarm on a high baud rate (56k), it fails in a few minutes. This is with a number of different versions of XCSoar, but not the latest. There is a known bug which is believed to have been fixed in XCSoar 6.3.6. From the change-logs for 6.3.6: * Android - fix crash on IOIO reconnect (#2130) - fix interference of two or more IOIO UARTs (#2107) - eliminate delay from IOIO connect I have not had a chance to test this version (let alone 6.3.7 which has just been released) to confirm if it fixes my problems. > To me this looks like violation of tolerance limits of signals exchanged > between level shifters and IOIO board. Unfortunately, I have no equipment to > check that. And being more a software than a hardware guy, I am not sure I > would find something. It never occurred to me that this might be a hardware issue. It seems unlikely as a number of people have experienced these problems and we are all using different hardware. > However, could that be the reason ? I suggest that you test the latest version of XCSoar and if it still fails, try and capture a dump file and submit bug report on this ticket, or open a new ticket. http://www.xcsoar.org/trac/ticket/2107 Ian ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Xcsoar-user mailing list Xcsoar-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xcsoar-user
