stm32f103c8t6写长短按键代码

对于STM32F103C8T6单片机的短按键和长按键检测，一般可以通过以下方式实现：

1. 短按键检测：使用GPIO中断，在按键按下时产生中断，然后检测按键是否仍处于按下状态，若是则判定为短按键。

2. 长按键检测：同样使用GPIO中断，在按键按下时产生中断，然后通过计时器进行计时，若按键在一定时间内未松开，则判定为长按键。

下面是一个简单的示例代码，仅供参考：

#include "stm32f10x.h"

#define SHORT_PRESS_THRESHOLD  10      // 短按键时间阈值
#define LONG_PRESS_THRESHOLD   5000    // 长按键时间阈值，单位为毫秒

int main(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;
    EXTI_InitTypeDef EXTI_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

    // 初始化GPIO，这里以PA0引脚为例
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    // 配置中断控制器NVIC
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
    NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    // 配置外部中断EXTI
    EXTI_InitStructure.EXTI_Line = EXTI_Line0;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);

    // 配置计时器TIM
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
    TIM_TimeBaseStructure.TIM_Period = 1000 - 1;   // 计数周期为1ms
    TIM_TimeBaseStructure.TIM_Prescaler = 7200 - 1; // 分频系数为72
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
    TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
    TIM_Cmd(TIM2, ENABLE);

    while (1)
    {
        // 主循环中可以执行其他任务
        // ...
    }
}

void EXTI0_IRQHandler(void)
{
    if (EXTI_GetITStatus(EXTI_Line0) != RESET)
    {
        static uint32_t start_time = 0;

        if (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == RESET)
        {
            start_time = TIM_GetCounter(TIM2);
        }
        else
        {
            uint32_t press_time = TIM_GetCounter(TIM2) - start_time;

            if (press_time < SHORT_PRESS_THRESHOLD)
            {
                // 短按键操作
                // ...
            }
            else if (press_time > LONG_PRESS_THRESHOLD)
            {
                // 长按键操作
                // ...
            }
        }

        EXTI_ClearITPendingBit(EXTI_Line0);
    }
}

void TIM2_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
    {
        TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
        TIM_Cmd(TIM2, DISABLE); // 停止计时器
        TIM_SetCounter(TIM2, 0); // 清零计数器
    }
}