uint32_t enableInterrupts(void)
'enableInterrupts() turns on the interrupt system allowing interrupts to be serviced.
The previous state of the interrupt system which may be used with restoreInterrupts() to return the interrupt system to the previous settings.
enableInterrupts() does not conform to any external API, it is unique to the chipKIT system.
Enable and restore interrupts:
uint32_t s = enableInterrupts();
// Perform operations
restoreInterrupts(s);
attachInterrupt(), detachInterrupt(), clearIntEnable(), clearIntFlag(), clearIntVector(), disableInterrupts(), getIntFlag(), getIntPriority(), getIntVector(), restoreIntEnable(), restoreInterrupts(), setIntEnable(), setIntPriority(), setIntVector()