帮我写一个基于stm32f103c8t6控制DHT11温湿度传感器控制灯，当温度过高，灯亮起的代码

好的，这里给您提供一个基于STM32F103C8T6和DHT11温湿度传感器的代码，当温度超过设定值时，点亮LED灯。

代码如下：

#include "stm32f10x.h"

#define DHT11_DATA_PIN GPIO_Pin_0
#define DHT11_DATA_PORT GPIOA

#define LED_PIN GPIO_Pin_1
#define LED_PORT GPIOA

void delay_us(uint32_t us) {
  SysTick->LOAD = 72 * us;
  SysTick->VAL = 0;
  SysTick->CTRL = SysTick_CTRL_ENABLE_Msk;

  while ((SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) == 0);

  SysTick->CTRL = 0;
}

void delay_ms(uint32_t ms) {
  while (ms--) {
    delay_us(1000);
  }
}

void DHT11_Init(void) {
  GPIO_InitTypeDef GPIO_InitStruct;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

  GPIO_InitStruct.GPIO_Pin = DHT11_DATA_PIN;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_OD;
  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(DHT11_DATA_PORT, &GPIO_InitStruct);

  GPIO_SetBits(DHT11_DATA_PORT, DHT11_DATA_PIN);
}

void DHT11_Start(void) {
  GPIO_WriteBit(DHT11_DATA_PORT, DHT11_DATA_PIN, RESET);
  delay_ms(18);
  GPIO_WriteBit(DHT11_DATA_PORT, DHT11_DATA_PIN, SET);
  delay_us(30);
}

uint8_t DHT11_Check_Response(void) {
  uint8_t Response = 0;

  delay_us(40);

  if (!GPIO_ReadInputDataBit(DHT11_DATA_PORT, DHT11_DATA_PIN)) {
    delay_us(80);
    if (GPIO_ReadInputDataBit(DHT11_DATA_PORT, DHT11_DATA_PIN)) {
      Response = 1;
    } else {
      Response = -1;
    }
  }

  while (GPIO_ReadInputDataBit(DHT11_DATA_PORT, DHT11_DATA_PIN));

  return Response;
}

uint8_t DHT11_Read(void) {
  uint8_t i, j;
  uint8_t data = 0;

  for (j = 0; j < 8; j++) {
    while (!GPIO_ReadInputDataBit(DHT11_DATA_PORT, DHT11_DATA_PIN));

    delay_us(40);

    if (GPIO_ReadInputDataBit(DHT11_DATA_PORT, DHT11_DATA_PIN) == 0) {
      i = 0;
      while (!GPIO_ReadInputDataBit(DHT11_DATA_PORT, DHT11_DATA_PIN));

      for (i = 0; i < 8; i++) {
        delay_us(30);

        if (GPIO_ReadInputDataBit(DHT11_DATA_PORT, DHT11_DATA_PIN)) {
          data |= 1 << (7 - i);
        }

        while (GPIO_ReadInputDataBit(DHT11_DATA_PORT, DHT11_DATA_PIN));
      }
    }
  }

  return data;
}

int main(void) {
  GPIO_InitTypeDef GPIO_InitStruct;
  uint8_t Temp = 0, RH = 0;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

  GPIO_InitStruct.GPIO_Pin = LED_PIN;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(LED_PORT, &GPIO_InitStruct);

  DHT11_Init();

  while (1) {
    DHT11_Start();
    if (DHT11_Check_Response() == 1) {
      RH = DHT11_Read();
      Temp = DHT11_Read();

      if (Temp > 30) {
        GPIO_SetBits(LED_PORT, LED_PIN);
      } else {
        GPIO_ResetBits(LED_PORT, LED_PIN);
      }
    }

    delay_ms(2000);
  }
}

在这个代码中，我们使用了STM32F103C8T6的SysTick定时器来实现延时功能。我们还使用了DHT11的三个函数来读取温湿度值，并利用读取到的温度值来控制LED灯的亮灭。

当温度大于30摄氏度时，LED灯会点亮；否则，LED灯会熄灭。您可以根据实际需求修改这个阈值。