基于stm32写sth11的驱动代码

好的，以下是一个基于STM32的SHT11驱动代码示例，希望对您有所帮助：

#include "stm32f10x.h"

#define SHT11_DATA_OUT()  GPIOC->CRH &= 0xFF0FFFFF; GPIOC->CRH |= 0x00300000 //PC13为输出
#define SHT11_DATA_IN()   GPIOC->CRH &= 0xFF0FFFFF; GPIOC->CRH |= 0x00800000 //PC13为输入

#define SHT11_SCL_H()     GPIOC->BSRR = GPIO_BSRR_BS14 //PC14拉高
#define SHT11_SCL_L()     GPIOC->BSRR = GPIO_BSRR_BR14 //PC14拉低

#define SHT11_SDA_H()     GPIOC->BSRR = GPIO_BSRR_BS13 //PC13拉高
#define SHT11_SDA_L()     GPIOC->BSRR = GPIO_BSRR_BR13 //PC13拉低

#define SHT11_SDA_IN()    GPIOC->IDR & GPIO_IDR_IDR13 //读取PC13的输入状态

void Delay_us(uint16_t time_us)
{
    uint16_t i;
    while(time_us--)
    {
        i = 10;
        while(i--);
    }
}

void SHT11_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
    SHT11_SDA_H();
    SHT11_SCL_H();
}

void SHT11_Reset(void)
{
    uint8_t i;
    SHT11_DATA_OUT();
    SHT11_SDA_H();
    SHT11_SCL_L();
    Delay_us(2);
    SHT11_SCL_H();
    Delay_us(1);
    SHT11_SDA_L();
    Delay_us(2);
    SHT11_SCL_L();
    Delay_us(10);
    SHT11_SCL_H();
    Delay_us(1);
    SHT11_DATA_IN();
    i = 0;
    while(SHT11_SDA_IN())
    {
        i++;
        if(i > 200)
        {
            SHT11_Init();
            return;
        }
        Delay_us(1);
    }
    SHT11_DATA_OUT();
    SHT11_SCL_L();
    Delay_us(2);
    SHT11_SCL_H();
    Delay_us(2);
    SHT11_SDA_H();
    Delay_us(2);
    SHT11_SCL_L();
}

void SHT11_Write_Byte(uint8_t value)
{
    uint8_t i;
    SHT11_DATA_OUT();
    for(i = 0; i < 8; i++)
    {
        SHT11_SCL_L();
        if(value & 0x80)
            SHT11_SDA_H();
        else
            SHT11_SDA_L();
        value <<= 1;
        Delay_us(2);
        SHT11_SCL_H();
        Delay_us(2);
    }
    SHT11_SCL_L();
    SHT11_DATA_IN();
    Delay_us(2);
    SHT11_SCL_H();
    Delay_us(2);
    SHT11_SCL_L();
}

uint8_t SHT11_Read_Byte(uint8_t ack)
{
    uint8_t i, value = 0;
    SHT11_DATA_IN();
    for(i = 0; i < 8; i++)
    {
        value <<= 1;
        SHT11_SCL_L();
        Delay_us(2);
        SHT11_SCL_H();
        if(SHT11_SDA_IN())
            value++;
        Delay_us(1);
    }
    SHT11_DATA_OUT();
    if(ack)
    {
        SHT11_SDA_L();
    }
    else
    {
        SHT11_SDA_H();
    }
    Delay_us(2);
    SHT11_SCL_L();
    Delay_us(2);
    SHT11_SDA_H();
    Delay_us(2);
    SHT11_SCL_H();
    Delay_us(2);
    SHT11_SCL_L();
    return value;
}

void SHT11_Measure_Temp(void)
{
    uint16_t i;
    SHT11_Reset();
    SHT11_Write_Byte(0x03);
    for(i = 0; i < 10000; i++);
    SHT11_Read_Byte(1);
    SHT11_Read_Byte(0);
}

void SHT11_Measure_Humi(void)
{
    uint16_t i;
    SHT11_Reset();
    SHT11_Write_Byte(0x05);
    for(i = 0; i < 10000; i++);
    SHT11_Read_Byte(1);
    SHT11_Read_Byte(0);
}

float SHT11_Get_Temp(void)
{
    uint16_t value;
    SHT11_Measure_Temp();
    value = SHT11_Read_Byte(1);
    value <<= 8;
    value |= SHT11_Read_Byte(0);
    return (float)value * 0.01 - 40.0;
}

float SHT11_Get_Humi(void)
{
    uint16_t value;
    SHT11_Measure_Humi();
    value = SHT11_Read_Byte(1);
    value <<= 8;
    value |= SHT11_Read_Byte(0);
    return (float)value * 0.04 - 4.0;
}

请注意，这只是一个简单的示例代码，需要根据您的具体需求进行修改和调整。同时，应根据您的硬件平台进行相应的引脚配置和时钟设置。