LM4F120H5QR的中断仿真器执行到一步的时候直接跳到中断处理函数

测试板为LM4F Launchpad
以下为源代码:目的是测试LAUNCHPAD上SW1开关对应GPIO口的中断.
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "inc/hw_ints.h"
#include "driverlib/sysctl.h"
#include "driverlib/debug.h"
#include "driverlib/fpu.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/rom.h"
#include "driverlib/interrupt.h"

void IntGPIOFHandler(void)
  [
    ROM_GPIOPinIntClear(GPIO_PORTF_AHB_BASE,GPIO_PIN_4);
    ROM_GPIOPinWrite(GPIO_PORTF_AHB_BASE,GPIO_PIN_3,0x08);
    ROM_SysCtlDelay(30000000);
    ROM_GPIOPinWrite(GPIO_PORTF_AHB_BASE,GPIO_PIN_3,0x00);


int main()
[
  
  

  
  //Clock Setting...
  ROM_SysCtlClockSet(SYSCTL_SYSDIV_2_5 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |
                       SYSCTL_OSC_MAIN);
  
  //Enable Peripheral
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);   //  Enable GPIOF
  
  //Configure GPIO Output Type
  
    //APBrefers to the Advanced Peripheral Bus, while AHB refers to the Advanced High-
    //Performance Bus. The AHB offers better back-to-back performance than the APB bus.
    //GPIO ports accessed through the AHB can toggle every clock cycle vs. once every two
    //cycles for ports on the APB. In power sensitive applications, the APB would be a better
    //choice than the AHB.
  ROM_SysCtlGPIOAHBEnable(SYSCTL_PERIPH_GPIOF);  //Enable AHB
  ROM_GPIOPinTypeGPIOInput(GPIO_PORTF_AHB_BASE,GPIO_PIN_4);   //PF4 input for interrupt
  ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_AHB_BASE,GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3);   //PF1,PF2,PF3 As Output
  
  //Interrupt Configure
  
  ROM_GPIOIntTypeSet(GPIO_PORTF_AHB_BASE,GPIO_PIN_4,GPIO_LOW_LEVEL);
  ROM_GPIOPinIntEnable(GPIO_PORTF_AHB_BASE,GPIO_PIN_4);
仿真器执行到这一步的时候,接直接跳到中断处理函数了,而且进去就出不来了...
  ROM_IntEnable(INT_GPIOF);
  ROM_IntMasterEnable();
  while(1)
    [
      //zz=IntIsEnabled(INT_GPIOF);
      ROM_GPIOPinWrite(GPIO_PORTF_AHB_BASE, GPIO_PIN_1|GPIO_PIN_2,0x0a);  
      ROM_SysCtlDelay(26881720);       //About 1s
      ROM_GPIOPinWrite(GPIO_PORTF_AHB_BASE, GPIO_PIN_1|GPIO_PIN_2,0x00);       //Attention It's "0x00", not "0" , "0" will not work here.
      ROM_SysCtlDelay(26881720);
    ]
  
  //return 0;
]