f28035的HRCAP按如下代码写好怎么只能进一次中断，为什么？

只看该作者 · 2014-1-20 22:48

初始化函数：
void sInitHRcap(void)       //add at 16:40 of 2014.1.16
{
EALLOW;
HRCap1Regs.HCCTL.bit.SOFTRESET = 1;
HRCap1Regs.HCCTL.bit.HCCAPCLKSEL = 1;  //HCCAPCLK = PLLCLK = SYSCLK * 2
HRCap1Regs.HCCTL.bit.FALLINTE = 1;    //Enable falling edge capture event interrupt
HRCap1Regs.HCCTL.bit.RISEINTE = 0;    //Disable Rising Edge Capture Event Interrupt
HRCap1Regs.HCCTL.bit.OVFINTE = 0;    //Disable interrupt on 16-bit Counter Overflow Event
EDIS;
}
中断函数：
interrupt void HRCAP1_INT_ISR(void)
{
GpioDataRegs.GPATOGGLE.bit.GPIO6 = 1;  //add at 22:30 of 2014.1.16
EALLOW;
HRCap1Regs.HCICLR.bit.FALL=1;  // Clear RISE/FALL flags
// HRCap1Regs.HCICLR.bit.RISE=1;
HRCap1Regs.HCICLR.bit.INT=1; // Clear HRCAP interrupt flag
PieCtrlRegs.PIEACK.bit.ACK4=1; // Acknowledge PIE Group 4 interrupts.
EDIS;
// Acknowledge this interrupt to receive more interrupts from group 2
PieCtrlRegs.PIEACK.all = PIEACK_GROUP4;
}
运行仿真只能进入一次中断，而且不易进入，求高手指点，谢谢！