Parallella Community

Following on from I was wondering how the MBKPT_FLAG is unset following it being set by a MBKPT instruction. That led to the following speculation...

Presumably it must happen as a result of writing 00 to DEBUGDMD, as DEBUGSTATUS is read only.

Do the contents of bit 1 when writing to DEBUGCMD affect the contents of MBKPT_FLAG? Thus writing 00 would clear it.

If so does it only affect the local core copy MBKPT_FLAG or does the zero propagate to other cores in the group? (That impacts whether one or many writes to DEBUGCMDs are needed to clear the MBKPT_FLAGs.)

If it propagates, would writing 11 to DEBUGCMD effectively cause a MBKPT?

Thanks in advance,

Tim

Thanks Andreas. The EARM describes DEBUGSTATUS as just readable. So it is writable as well but this is not recommended. If features are added in the future it may be even less desirable to do so, so I'll stay away from that.

Tim