##### Synopsis

    #include <inavr.h>
    unsigned __enable_interrupt(void);

##### Description

__enable_interrupt enables global interrupts by setting the I bit in the status register and returns the value of the status register before the I bit is set. You can restore the state of the I bit from the value returned from __enable_interrupt by using the __restore_interrupt intrinsic function.

__enable_interrupt is an intrinsic function and produces inline code.

##### Example

    void run_with_interrupts_enabled(void)
    {
      // Enable interrupts and save interrupt enable state
      unsigned char state = __enable_interrupt();

      // Processing with interrupts enabled here

      // Restore interrupt enable state from saved value
      __restore_interrupt(state);
    }

##### Portability

__enable_interrupt can be used on any AVR device.

##### See Also

__restore_interrupt