CC2530 上升沿输入中断为什么不进中断呢？这样配置不对吗？

P0DIR &= ~BIT1;
P0SEL &= ~BIT1;

P2INP |= BIT5;  
P0INP &= ~BIT1; //pull up/pull down

P0IEN |= BIT1;

PICTL &= ~BIT0; //bit0 1下降沿触发 /0上升沿

EA = 1;
IEN1 |= 0X20; // P0设置为中断方式;

P0IFG &= ~0x02; //初始化中断标志位

P0DIR &= ~0x02;   /* Set as Input */

  P0INP |= 0x02;            /* Set as tri-state */ 

  P0IFG = 0;

  P0IF = 0;

  PICTL &= ~0x01;   /* Set P0 to Rising Edge Interrupt */

  IEN1 |= 0x20;     /* Enable P0 interrupts */</span>