STM8L10x 中断库函数FunctionalState NewState的问题

使用STM8L101F3P芯片，用iar库函数，想实现最简单的按键中断，在库里有一函数

void EXTI_SetHalfPortSelection(EXTI_HalfPort_TypeDef EXTI_HalfPort,

                               FunctionalState NewState)

如图所示，

在使用这个函数的时候，EXTI_HalfPort_TypeDef EXTI_HalfPort可以使用上面提供的组合，

例如EXTI_HalfPort_B_LSB

可是FunctionalState NewState这个应该填什么进去呢，说明没有提供，直接填上十六进制数上去也不行，请教大家一下，谢谢...！

下面贴上直接在库里复制出的原函数

/**

  * @brief  Configure the half port interrupt selection.

  * @note   This function must be called once the port sensitivity is configured,

  *          otherwise this function call won't have any effect on the port external interrupt.

  * @param  EXTI_HalfPort The port part  to access (MSB or LSB).

  *          This parameter can be any combination of the following values:

  *            @arg EXTI_HalfPort_B_LSB:     Interrupt selector PB(3:0)

  *            @arg EXTI_HalfPort_B_MSB:     Interrupt selector PB(7:4)

  *            @arg EXTI_HalfPort_D_LSB:     Interrupt selector PE(3:0)

  *            @arg EXTI_HalfPort_D_MSB:     Interrupt selector PE(7:4)

  * @param  NewState  The external interrupt new state.

  * @retval None

  */

void EXTI_SetHalfPortSelection(EXTI_HalfPort_TypeDef EXTI_HalfPort,

                               FunctionalState NewState)

{

  /* Check function parameters */

  assert_param(IS_EXTI_HALFPORT(EXTI_HalfPort));

  assert_param(IS_FUNCTIONAL_STATE(NewState));

  if (NewState ！= DISABLE)

  {

    EXTI->CONF |= (uint8_t)EXTI_HalfPort; /* Enable port interrupt selector */

  }

  else /*NewState == DISABLE */

  {

    EXTI->CONF &= (uint8_t)(~(uint8_t)EXTI_HalfPort); /* Disable port interrupt selector */

  }

}

当前的状态 ENABLE或者DISABLE

functionalstate来自这里:typedef enum {DISABLE = 0, ENABLE = ！DISABLE} FunctionalState;而你仿真可以看一下,此时NewState的值为ENABLE=0X00000001

解决了么?同问
麻烦来个例子  谢谢