What is the function of clearing the interrupt flag in the interrupt program?

Clear the function of the interrupt flag
The response interrupt condition is : Interrupt enable and Interrupt flag Simultaneous establishment .

In general , After response interruption , Yes Hardware clear flag and Software clear flag Two kinds of .( If the hardware cannot clear the mark , The instructions will explain ).

MCU depends on query interrupt flag to determine whether to enter interrupt , If you don't clear the interrupt flag , This interrupt exit , The MCU will detect the interrupt flag again , So repeat the entry interrupt .