stm32f4 __wfi

[Christian Mauderer]

Am 22.04.19 um 09:47 schrieb Jython:
> HI, ALL!
> wfi http://www.keil.com/support/man/docs/armcc/armcc_chr1359125004400.htm
> how can i call the arm __wfi?
> 
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Hello Jython,

WFI is an assembler instruction. The Keil wrapper isn't available in
gcc. I know of no direct replacement. Most likely you need a gcc inline
assembly for that.

May I ask why you would need "wfi"? If you use a operating system, the
system typically handles such low level stuff for you. The only
application that springs to mind for that instruction is overwriting the
idle loop to save energy.

Best regards

Christian

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