帮我用keil写一个基于DHT11测量温湿度的stm32f1的c语言程序

好的，以下是一个基于DHT11测量温湿度的STM32F1的C语言程序：

#include "stm32f10x.h"

#define DHT11_PORT GPIOA
#define DHT11_PIN GPIO_Pin_0

void delay_us(uint32_t us) {
    uint32_t i = 0;
    while (us--) {
        i = 10;
        while (i--) {};
    }
}

void dht11_start(void) {
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = DHT11_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(DHT11_PORT, &GPIO_InitStructure);

    GPIO_ResetBits(DHT11_PORT, DHT11_PIN);
    delay_us(18000);
    GPIO_SetBits(DHT11_PORT, DHT11_PIN);
    delay_us(20);
}

uint8_t dht11_check(void) {
    uint8_t retry = 0;
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = DHT11_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(DHT11_PORT, &GPIO_InitStructure);

    while (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN) && retry < 100) {
        retry++;
        delay_us(1);
    }

    if (retry >= 100) {
        return 1;
    }
	
    retry = 0;
    while (!GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN) && retry < 100) {
        retry++;
        delay_us(1);
    }

    if (retry >= 100) {
        return 1;
    }

    return 0;
}

uint8_t dht11_read_bit(void) {
    uint8_t retry = 0;
    while (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN) && retry < 100) {
        retry++;
        delay_us(1);
    }

    retry = 0;
    while (!GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN) && retry < 100) {
        retry++;
        delay_us(1);
    }

    delay_us(40);

    if (GPIO_ReadInputDataBit(DHT11_PORT, DHT11_PIN)) {
        return 1;
    } else {
        return 0;
    }
}

uint8_t dht11_read_byte(void) {
    uint8_t i, data = 0;
    for (i = 0; i < 8; i++) {
        data <<= 1;
        data |= dht11_read_bit();
    }
    return data;
}

void dht11_read(uint8_t *temp, uint8_t *hum) {
    uint8_t i, buf[5];

    dht11_start();
    if (dht11_check() == 0) {
        for (i = 0; i < 5; i++) {
            buf[i] = dht11_read_byte();
        }

        if ((buf[0] + buf[1] + buf[2] + buf[3]) == buf[4]) {
            *hum = buf[0];
            *temp = buf[2];
        }
    }
}

int main(void) {
    uint8_t temp, hum;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    while (1) {
        dht11_read(&temp, &hum);
        printf("Temperature: %dC, Humidity: %d%%\n", temp, hum);
        delay_us(500000);
    }
}

这个程序通过STM32F1的GPIO接口和DHT11传感器进行通信，读取温度和湿度数据，并通过串口输出。请注意，这个程序可能需要根据您的硬件配置进行一些修改。