On Fri, Jul 8, 2011 at 10:27 AM, Xiaofan Chen <[email protected]> wrote: > On Fri, Jul 8, 2011 at 10:00 PM, Xiaofan Chen <[email protected]> wrote: >> On Fri, Jul 8, 2011 at 9:21 PM, Eric Wetzel <[email protected]> wrote: >>> >>> I downloaded the oldest version available (v4.00) from the page >>> Xiaofan provided, and downgraded the firmware. I had to reinstall my >>> libusb filter for the J-Link, but I'm not getting the same USB read >>> problems. Actually, it looks like it's working. > > Yes once you upgrade/downgrade the J-Link firmware, it will re-enumerate > and therefore you will need to re-install the libusb-win32 device filter. > But it is quite convenient with the GUI filter wizard. > >> Yes I can reproduce the issue with Luminary EK-LM3S1968 board, with the >> latest firmware it failed just like your previous post. Then if I downgrade >> the >> firmware to 4.08i and OpenOCD will work. >> >> For those who want to downgrade the firmware, here is the doc. >> http://www.segger.com/cms/admin/uploads/productDocs/UM08001_JLinkARM.pdf >> (Section 9.5) >> >> This is a known problem. >> http://www.segger2.com/index.php?page=Thread&threadID=869 >> http://comments.gmane.org/gmane.comp.debugging.openocd.devel/16831 >> http://www.segger2.com/index.php?page=Thread&threadID=707 >> (4.10i works, 4.22 failed) > > BTW, this seems to only affect V8 J-Link, I tried a V7 with the > latest J-Link firmware and it works with OpenOCD. > > > -- > Xiaofan >
I did a rather tedious bisection on the J-Link firmwares released by Segger. Here is where the defect is introduced: V4.14h: Bad (tested) J-Link ARM V8 compiled Aug 4 2010 19:16:19 The last good version was: V4.14g: Good (tested) J-Link ARM V8 compiled Dec 1 2009 11:42:48 Their Release Notes aren't very consistent in these packages, being labelled "Release notes for J-Flash ARM V4.08a" and having version information only up until V4.12. But who knows what they could have changed in 8 months. And I tested the latest version (V4.32) to ensure that the problem wasn't corrected on their end, and it was not. I only tested this on my V8 J-Link, but Xiaofan said that the V7 works fine. ~Eric _______________________________________________ Openocd-development mailing list [email protected] https://lists.berlios.de/mailman/listinfo/openocd-development
