ARM Technical Support Knowledge Articles

CORTEX-M3 DEVICE SIMULATION RESULT DIFFERS FROM REAL HARDWARE

Applies to: ARM Development Tools

Answer


Information in this article applies to:


SYMPTOMS

During some tests with a Cortex-M3 beased device like toggling a general IO pin I have noticed, that the target hardware is slower than simulation.

What is the reason for this difference?

CAUSE

The Cortex-M3 simulation is cycle accurate with the following exceptions:

In general this means that simulator will show a bit faster execution.

CONCLUSION

We can say simulation will slightly differ from the hardware regarding cycles due to some Cortex-M features are not fully simulated and due to different vendor specific memory interfaces implementations which are also do not simulated.

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Article last edited on: 2010-07-21 06:06:21

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