stm32控制dht11，串口实现代码

我很高兴回答您的问题！以下是一个基于STM32的DHT11传感器读取和串口通信的代码示例：

#include "stm32f10x.h"
#include "dht11.h"

uint8_t humidity = 0, temperature = 0;

int main(void)
{
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_USART1, ENABLE);

GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //USART1 Tx (PA.9)
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);

while (1)
{
DHT11_Read_Data(&humidity, &temperature);

char temp[10];
sprintf(temp, "%d.%d", temperature / 10, temperature % 10);
char humi[10];
sprintf(humi, "%d.%d", humidity / 10, humidity % 10);

char buf[50];
sprintf(buf, "Temperature: %s C, Humidity: %s %%\r\n", temp, humi);
USART_SendData(USART1, buf, strlen(buf));
delay_ms(2000);
}
}

请注意，本示例代码只是作为一个参考，其中的延迟函数等可能需要按照实际硬件进行适当调整。如果您有任何问题，请随时向我提问。