2008/6/26 alitapontanares <[EMAIL PROTECTED]>: > what is the purpose of IRQ?
Depend on IRQ, but in general you can do something else while you wait for an internal or external event that generates a Request of Interrupt (IRQ). Then the processor interrupts itself and execute the specific interrupt routine. In control systems (and mainly in real-time system) it is useful (or necessary) to guarantee time deadline. Moreover the processor doesn't have to poll every events so the contol system (and the use of processor in particular) is more efficient. bye
