9. Miscellaneous instructionsΒΆ

  • nop() pass no operation.
  • wfi() Suspend execution in a low power state until an interrupt occurs.
  • cpsid(flags) set the Priority Mask Register - disable interrupts.
  • cpsie(flags) clear the Priority Mask Register - enable interrupts.

Currently the cpsie() and cpsid() functions are partially implemented. They require but ignore the flags argument and serve as a means of enabling and disabling interrupts.