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外部中断标志位

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张さん|

楼主 | 2019-11-20 20:00 | 只看该作者回帖奖励

|倒序浏览 |阅读模式

外部中断, TI, pi, gp, GPIO

如果用到了两个GPIOB12和GPIOD12的中断向量，那怎么判断是否产生了EXTI_LINE？我在中断服务子程序中怎么写？

/* EXTI line gpio config(PB12) */
   GPIO_InitStructure.GPIO_Pin = PIN_KEY10 ;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
   GPIO_Init(PORT_KEY10, &GPIO_InitStructure);
/* EXTI line(PB12) mode config */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource12);
EXTI_InitStructure.EXTI_Line = EXTI_Line12;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

      /* EXTI line gpio config(PD12) */
  GPIO_InitStructure.GPIO_Pin = PIN_KEY4 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(PORT_KEY4, &GPIO_InitStructure);

      /* EXTI line(PD12) mode config */
  GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource12);
  EXTI_InitStructure.EXTI_Line = EXTI_Line12;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);

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