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ZigBeeCC2530协议栈中按键中断识别问题

协议栈中,我按键采用中断方式识别,在P0口、P1口、P2口都接有按键,在按键处理函数中,不同按键对应不同的处理函数,但是当任一按键按下时,会将所有的按键处理函数都执行一遍,请问如何解决?