【EFM32开发笔记】GPIOE外部中断使用

/**************************************************************************//**
 * @brief  Gpio回调函数
 * @param  pin - pin which triggered interrupt
 *****************************************************************************/
void gpioCallback(uint8_t pin)
{
  if (pin == 9)
  {
    BSP_LedToggle(3);　　　//端口翻转，LED亮灭交替
  }
  else if (pin == 10)
  {
    BSP_LedToggle(0);
  }
}

/**************************************************************************//**
 * @brief  Gpio setup. Setup button pins to trigger falling edge interrupts.
 *  Register callbacks for that interrupts.
 *****************************************************************************/
void gpioSetup(void)
{
  /* Enable GPIO in CMU */
  CMU_ClockEnable(cmuClock_GPIO, true);

  /* Initialize GPIO interrupt dispatcher */
  GPIOINT_Init();
  
  /* Configure PB9 and PB10 as input */
  GPIO_PinModeSet(gpioPortB, 9, gpioModeInput, 0);
  GPIO_PinModeSet(gpioPortB, 10, gpioModeInput, 0);

  /* Register callbacks before setting up and enabling pin interrupt. */
  GPIOINT_CallbackRegister(9, gpioCallback);
  GPIOINT_CallbackRegister(10, gpioCallback);

  /* Set falling edge interrupt for both ports */
  GPIO_IntConfig(gpioPortB, 9, false, true, true);
  GPIO_IntConfig(gpioPortB, 10, false, true, true);
}

/**************************************************************************//**
 * @brief  Main function
 *****************************************************************************/
int main(void)
{
  /* Chip errata */
  CHIP_Init();

  /* If first word of user data page is non-zero, enable eA Profiler trace */
  BSP_TraceProfilerSetup();

  /* Initialize gpio */
  gpioSetup();

  /* Initialize LED driver */
  BSP_LedsInit();

  /* Infinite loop */
  while (1);
}

按下板上的按键（PB0、PB1）将会实现LED的亮灭交替。