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P1口和P2做下降沿中断按键

为什么外中断口是P2.0,程序里却这样设置

#define HAL_KEY_JOY_MOVE_ICTL     P2IEN /* Port Interrupt Control register */

#define HAL_KEY_JOY_MOVE_EDGEBIT  BV(3)

HAL_KEY_JOY_MOVE_ICTL |= HAL_KEY_JOY_MOVE_EDGEBIT;??

P1口有设置了相应的寄存器,为什么不能进入中断?

P00,P01,P07仿真时能进入HalKeyPoll();脱机后却不行