8 Feb
2011
8 Feb
'11
10:20 a.m.
Morning,
y, STM is not in the same family that xTM which trace execution & data flow of an ARM core (non intrusive). STM is more at applicative trace level like printf (output console only).
Well, what I mean is that xTMs - ETM/PTM tracing execution flow, ITM behaving like mentioned printf (STM's older sibling), etc. - are just source of data in the CoreSight architecture, connected to a (shared) trace bus, which then has sinks like trace port and trace buffer. Have a look at this diagram:
http://www.arm.com/images/CoreSight_Diagram.jpg
And as far as I know STM can be configured to do the same, but you should really talk to Ian - he's the resident expert in this subject :-) I'll forward him your questions.
Cheers!
Paweł