我的问题找到了，我使用的是stm32l151rct6,需要将PA15、PB5\6\7进行中断设置。
特别注意
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB,EXTI_PinSource5);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB,EXTI_PinSource6);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB,EXTI_PinSource7);
不能够合并成一句
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB,EXTI_PinSource5|EXTI_PinSource6|EXTI_PinSource7);
合并后只有7有效，原因可以按该库函数的定义。
在中断处理函数中，IRQHandler（）中使用if(EXTI_GetITStatus(EXTI_Linex != RESET) 进行区分(x=5/6/7)
void EXTI9_5_IRQHandler(void)
{
uint8_t data;
if(EXTI_GetITStatus(EXTI_Line5) != RESET)
{
BOARD_LED_OFF(LED1);
BOARD_LED_OFF(LED3);
data='2';
usart1_sendbyte(&data,1);
EXTI_ClearITPendingBit(EXTI_Line5); // Clear the EXTI line 5 pending bit
}
if(EXTI_GetITStatus(EXTI_Line6) != RESET)
{
BOARD_LED_ON(LED1);
BOARD_LED_OFF(LED3);
data='3';
usart1_sendbyte(&data,1);
EXTI_ClearITPendingBit(EXTI_Line6); // Clear the EXTI line 5 pending bit
}
if(EXTI_GetITStatus(EXTI_Line7) != RESET)
{
BOARD_LED_OFF(LED1);
BOARD_LED_ON(LED3);
data='4';
usart1_sendbyte(&data,1);
EXTI_ClearITPendingBit(EXTI_Line7); // Clear the EXTI line 5 pending bit
}
}
void BoardInit(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable GPIOs clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB, ENABLE);
//init GPIOA.13 ÉÏÀÊäÈë Key_1
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// Connect Button EXTI Line to GPIO Pin 15
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA,EXTI_PinSource15);
EXTI_InitStructure.EXTI_Line = EXTI_Line15 ;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn ;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
// exti9_5 pb5 pb6 pb7
GPIO_InitStructure.GPIO_Pin= GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB,EXTI_PinSource5);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB,EXTI_PinSource6);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB,EXTI_PinSource7);
EXTI_InitStructure.EXTI_Line = EXTI_Line5|EXTI_Line6|EXTI_Line7;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn ;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure)；
}
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楼主
学习了
