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[QUOTE="Lanarcam, post: 5019853"]
Le 25/04/2012 20:44, James Kuyper a écrit :

This is not only system dependant but also processor dependant. For
instance Cortex M0 processor have instructions for entering sleep
mode.

"Wait for interrupt

The Wait For Interrupt instruction, WFI, causes immediate entry
to sleep mode. When the processor executes a WFI instruction it
stops executing instructions and enters sleep mode. See WFI for
more information.

Wait for event

The Wait For Event instruction, WFE, causes entry to sleep
mode conditional on the value of a one-bit event register.
When the processor executes a WFE instruction, it checks
the value of the event register:

0

The processor stops executing instructions and enters sleep
mode

1

The processor sets the register to zero and continues
executing instructions without entering sleep mode."

Obviously, the OS or RTOS must support those instructions.

<[URL]http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0497a/BABHHGEB.html[/URL]>
[/QUOTE]

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