STR9 gets stuck at ( LDMFD LR, {R0-R14}^ )

sachindbhujbal wrote on Friday, May 09, 2008:

Dear All,
     Very Very Thanks to Ben Hewson.
     I am using FreeRTOs compiled with GCC on STR912FW44. But STR9 gets stuck
at instruction (LDMFD    LR, {R0-R14}^ ) which is used for restoring system mode
registers for the task. It is called in function vPortISRStartFirstTask()
     Please help me in this issue.

rtel wrote on Friday, May 09, 2008:

This is almost certainly because you are not calling main() from Supervisor mode.

I would be grateful if you could also send me a copy of your project - r (dot) barry _at_


ben_fnr wrote on Friday, May 09, 2008:

Hi Richard, you are absolutely correct, it was partly my fault as I gave him the wrong information, keep getting the 2 modes confused. but I checked his startup.s this morning and it was in system mode.

Would you like a copy of the GCC port, it is very basic, with none of the demo stuff included, but perhaps you can include it some time


rtel wrote on Friday, May 09, 2008:

Yes - please send the port.  It always useful so I can forward it to others wanting a starting point.  That is the beauty of open source :o)  I may have something on record anyway, but one more is always good.  Use the r _dot_ barry +@+ address rather than the SourceForge address as SourceForge will strip binaries and I have no idea how to reply to them.