使用stm32标准库设定PA0和PA1为外部中断口，按键中断led1，led2

的状态翻转。

以下是使用stm32标准库设定PA0和PA1为外部中断口，按键中断led1，led2的状态翻转的示例代码：

#include "stm32f10x.h"

#define LED1_PIN GPIO_Pin_8
#define LED2_PIN GPIO_Pin_9
#define BUTTON1_PIN GPIO_Pin_0
#define BUTTON2_PIN GPIO_Pin_1

void GPIO_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    // 配置LED引脚为推挽输出模式
    GPIO_InitStructure.GPIO_Pin = LED1_PIN | LED2_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置按键引脚为浮空输入模式
    GPIO_InitStructure.GPIO_Pin = BUTTON1_PIN | BUTTON2_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置PA0和PA1为外部中断口
    GPIO_InitStructure.GPIO_Pin = BUTTON1_PIN | BUTTON2_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

void EXTI_Config(void)
{
    EXTI_InitTypeDef EXTI_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    // 配置PA0和PA1为外部中断
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
    EXTI_InitStructure.EXTI_Line = EXTI_Line0;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);

    GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource1);
    EXTI_InitStructure.EXTI_Line = EXTI_Line1;
    EXTI_Init(&EXTI_InitStructure);

    // 配置中断优先级
    NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
    NVIC_Init(&NVIC_InitStructure);
}

void EXTI0_IRQHandler(void)
{
    if (EXTI_GetITStatus(EXTI_Line0) != RESET)
    {
        // 翻转LED1状态
        GPIO_WriteBit(GPIOA, LED1_PIN, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOA, LED1_PIN)));

        EXTI_ClearITPendingBit(EXTI_Line0);
    }
}

void EXTI1_IRQHandler(void)
{
    if (EXTI_GetITStatus(EXTI_Line1) != RESET)
    {
        // 翻转LED2状态
        GPIO_WriteBit(GPIOA, LED2_PIN, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOA, LED2_PIN)));

        EXTI_ClearITPendingBit(EXTI_Line1);
    }
}

int main(void)
{
    GPIO_Config();
    EXTI_Config();

    while (1);

    return 0;
}