Xiaofan Chen wrote: > On Thu, Apr 22, 2010 at 6:38 PM, Jon Povey > <jon.po...@racelogic.co.uk> wrote: >> I have switched from running OpenOCD on Linux inside VirtualBox, to >> running it natively on XP. I have not been able to reproduce the >> situation that needed the JTAGKey-Tiny to be replugged, but I still >> get random communication errors. > > Ah ha, so VirtualBox does play a part.
Well, not obviously. To be clearer: I only ever saw the needing-replug sitution happen ONCE, on virtualbox linux, but I was banging pretty hard on it for a couple of days. I have however seen these random errors consistently on both platforms. Since then I have also tested the latest GIT version under (virtual) linux, and also the latest git version build with FTDI's drivers instead of libftdi. All combinations show the same random errors. Also tried at a range of different JTAG clock speeds, makes no difference. I am looking through documentation for other tuneables I can try fiddling with, and I have a logic analyer/scope arriving next week which might be of use. Should also get the DM355EVM before too long for comparison. I am wondering things like: - might it be some kind of earth problem? I am in Japan, the computer and DUT are all running off 2-pin power, no earths. - some noise / inadequate power limitation of the JTAGKey-Tiny? Maybe I need a more manly JTAG adapter? That one's a bit of a stretch.. Just a shame I don't have an alternative here for comparison. Pressin' and guessin', -- Jon Povey jon.po...@racelogic.co.uk Racelogic is a limited company registered in England. Registered number 2743719 . Registered Office Unit 10, Swan Business Centre, Osier Way, Buckingham, Bucks, MK18 1TB . The information contained in this electronic mail transmission is intended by Racelogic Ltd for the use of the named individual or entity to which it is directed and may contain information that is confidential or privileged. If you have received this electronic mail transmission in error, please delete it from your system without copying or forwarding it, and notify the sender of the error by reply email so that the sender's address records can be corrected. The views expressed by the sender of this communication do not necessarily represent those of Racelogic Ltd. Please note that Racelogic reserves the right to monitor e-mail communications passing through its network _______________________________________________ Openocd-development mailing list Openocd-development@lists.berlios.de https://lists.berlios.de/mailman/listinfo/openocd-development
