写一个基于stm32F103C8T6的闹钟定时开关窗帘程序

这是一个基于stm32F103C8T6的闹钟定时开关窗帘程序的大致实现过程：

1. 首先定义好需要使用的引脚和外设，例如使用定时器控制窗帘电机，使用RTC实现闹钟功能等等。

2. 初始化RTC，设置闹钟时间，并启动RTC定时器。

3. 初始化定时器，设置时钟周期和PWM输出等参数，并启动定时器计数器。

4. 在主循环中不断检测RTC的时间是否到达闹钟时间，如果到达则触发开关窗帘的操作。

5. 窗帘的开关操作可以通过定时器的PWM输出控制电机转动的方向和速度。

下面是参考代码实现，具体细节还需要根据具体情况进行调整和完善：

#include "stm32f10x.h"
#include "stm32f10x_rtc.h"
#include "stm32f10x_tim.h"

#define CURTAIN_UP   100 // 窗帘向上转动的PWM占空比
#define CURTAIN_DOWN 50  // 窗帘向下转动的PWM占空比

void RTC_Config(void)
{
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
    PWR_BackupAccessCmd(ENABLE);

    /* Check if the StandBy flag is set */
    if (PWR_GetFlagStatus(PWR_FLAG_SB) != RESET)
    {
        /* Clear StandBy flag */
        PWR_ClearFlag(PWR_FLAG_SB);

        /* Wait for RTC registers synchronization */
        RTC_WaitForSynchro();
    }

    RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
    RCC_RTCCLKCmd(ENABLE);
    RTC_WaitForSynchro();

    RTC_InitTypeDef RTC_InitStructure;
    RTC_InitStructure.RTC_AsynchPrediv = 0x7F;
    RTC_InitStructure.RTC_SynchPrediv = 0x00FF;
    RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
    RTC_Init(&RTC_InitStructure);

    RTC_TimeTypeDef RTC_TimeStructure;
    RTC_TimeStructure.RTC_H12     = RTC_H12_PM;
    RTC_TimeStructure.RTC_Hours   = 12;
    RTC_TimeStructure.RTC_Minutes = 0;
    RTC_TimeStructure.RTC_Seconds = 0;
    RTC_SetTime(RTC_Format_BIN, &RTC_TimeStructure);

    RTC_AlarmTypeDef RTC_AlarmStructure;
    RTC_AlarmStructure.RTC_AlarmTime.RTC_H12     = RTC_H12_PM;
    RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours   = 12;
    RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = 1;
    RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = 0;
    RTC_AlarmStructure.RTC_AlarmMask            = RTC_AlarmMask_DateWeekDay;
    RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);

    RTC_ITConfig(RTC_IT_ALRA, ENABLE);
    EXTI_ClearITPendingBit(EXTI_Line17);
}

void TIM_Config(void)
{
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_TimeBaseStructure.TIM_Period        = 1000 - 1; // 1ms周期
    TIM_TimeBaseStructure.TIM_Prescaler     = 72 - 1;   // 1us计数
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode   = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    TIM_OCInitTypeDef TIM_OCInitStructure;
    TIM_OCInitStructure.TIM_OCMode      = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse       = 0;
    TIM_OCInitStructure.TIM_OCPolarity  = TIM_OCPolarity_High;
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);

    TIM_Cmd(TIM3, ENABLE);
}

void openCurtain(void)
{
    TIM3->CCR1 = CURTAIN_UP;
    // 判断窗帘是否到位，到位则停止转动
}

void closeCurtain(void)
{
    TIM3->CCR1 = CURTAIN_DOWN;
    // 判断窗帘是否到位，到位则停止转动
}

int main(void)
{
    RTC_Config();
    TIM_Config();

    while (1)
    {
        RTC_TimeTypeDef RTC_TimeStructure;
        RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructure);

        RTC_AlarmTypeDef RTC_AlarmStructure;
        RTC_GetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);

        if (RTC_TimeStructure.RTC_Hours == RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours &&
            RTC_TimeStructure.RTC_Minutes == RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes &&
            RTC_TimeStructure.RTC_Seconds == RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds)
        {
            openCurtain();
            // 等待一定时间后关闭窗帘
            closeCurtain();
        }
    }
}