Am Mo 20. April 2009 schrieb J Baart: > Hello, > > I'm currently working on a bootloader for the neo freerunner. I can't get > gdb completely working so I'm looking for another way to debug. However I do > have a Lauterbach. When I connect the Lauterbach to the 20pin JTAG connector > on the debug board (v3) I cannot power on the freerunner. When I connect an > usb adapter to power the debug device, the freerunner will power on. I can > attach the device with Trace32 but when it tries to bring up the system it > gives some error messages like: "emulation reset detected". I used a Trace32 > file that I downloaded from the Samsung website to do the basic init of the > s3c2442 so that shouldn't be the problem. > > Now I'm not sure if it's possible to use the debug board to connect a > Lauterbach. It seems like the pins are connected correctly and I don't think > that an external power source should be connected. > > So my question is: Is there someone out there that got a Lauterbach working > in combination with the debug board? Or is there someone that can tell me if > it's possible to use a Lauterbach in combination with a debug board.
As I get it you're hooking a hw-jtag-debugger (Lauterbach) to the 20pin-post-connector of debug-board to access FR. This connector is not designed to adapt an external jtag-debugger to FR, instead it's supposed usage is to connect other jtag-targets to debug board and use the jtag<->USB gate on debug board to run a jtag-sw-debugger controlling either the FR or any of those other jtag-target-devices connected via 20-post. Your connection might fail due to USB-chip creating undefined load on the jtag-lines from Lauterbach to FR. Hope I got it right when trying to understand what you intended to do. cheers jOERG
signature.asc
Description: This is a digitally signed message part.
_______________________________________________ support mailing list support@lists.openmoko.org https://lists.openmoko.org/mailman/listinfo/support