基于stm32f103c8t6芯片的有一个蜂鸣器和ZE08甲醛传感器程序设计

以下是基于STM32F103C8T6芯片的蜂鸣器和ZE08甲醛传感器程序设计示例：

#include "stm32f10x.h"
#include "stdio.h"

#define BEEP_PIN GPIO_Pin_8
#define BEEP_GPIO GPIOB

#define ZE08_TX_PIN GPIO_Pin_9
#define ZE08_RX_PIN GPIO_Pin_10
#define ZE08_GPIO GPIOA

USART_InitTypeDef USART_InitStructure;

void USART1_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

    /* Configure USART1 Tx (PA9) as alternate function push-pull */
    GPIO_InitStructure.GPIO_Pin = ZE08_TX_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(ZE08_GPIO, &GPIO_InitStructure);

    /* Configure USART1 Rx (PA10) as input floating */
    GPIO_InitStructure.GPIO_Pin = ZE08_RX_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(ZE08_GPIO, &GPIO_InitStructure);

    /* USART1 configuration ------------------------------------------------------*/
    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_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

    USART_Init(USART1, &USART_InitStructure);

    /* Enable USART1 */
    USART_Cmd(USART1, ENABLE);
}

void BEEP_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

    GPIO_InitStructure.GPIO_Pin = BEEP_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(BEEP_GPIO, &GPIO_InitStructure);
}

int main(void)
{
    uint8_t data[9];
    uint16_t value;
    char str[20];

    USART1_Init();
    BEEP_Init();

    while (1)
    {
        /* 读取ZE08甲醛传感器数据 */
        while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
        if (USART_ReceiveData(USART1) == 0xFF)
        {
            while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
            if (USART_ReceiveData(USART1) == 0x17)
            {
                for (int i = 0; i < 7; i++)
                {
                    while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
                    data[i] = USART_ReceiveData(USART1);
                }
                value = ((uint16_t)data[4] << 8) + data[5];
                sprintf(str, "ZE08: %d ug/m3\r\n", value);
                USART_SendString(USART1, str);

                /* 根据读取到的甲醛浓度值控制蜂鸣器 */
                if (value > 100)
                {
                    GPIO_SetBits(BEEP_GPIO, BEEP_PIN);
                    delay(100);
                    GPIO_ResetBits(BEEP_GPIO, BEEP_PIN);
                }
            }
        }
    }
}

上述代码初始化了USART1和蜂鸣器引脚，通过USART1从ZE08甲醛传感器读取数据，根据读取到的数据控制蜂鸣器。请注意，在此示例中我们使用了一个名为`delay()`的函数，它应该是用户自定义的延迟函数。您需要根据自己的需求进行相应的修改。