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nop() - no operation - do nothing ... use in delay loops ... equivalent of python pass statement
wfi() (a no arguments function) Suspend execution in a low power state until an interrupt occurs
cpsid(flags) set the Priority Mask Register - disable interrupts. (see ARM v7-M Architecture Reference Manual page B1-19)
cpsie(flags) clear the Priority Mask Register - enable interrupts.
Last edited by Peter Hinch, 2015-02-28 07:35:37
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