MAX30205 STM32代码

以下是 MAX30205 温度传感器的 STM32 代码示例：

#include "stm32f4xx.h"
#include "stm32f4xx_i2c.h"

#define MAX30205_ADDR 0x90
#define I2C_TIMEOUT 10000

I2C_TypeDef* I2C = I2C1;

void I2C_Configuration(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;
    I2C_InitTypeDef I2C_InitStruct;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_9;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_OD;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOB, &GPIO_InitStruct);

    GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_I2C1);
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_I2C1);

    I2C_InitStruct.I2C_ClockSpeed = 400000;
    I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;
    I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;
    I2C_InitStruct.I2C_OwnAddress1 = 0x00;
    I2C_InitStruct.I2C_Ack = I2C_Ack_Enable;
    I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_Init(I2C1, &I2C_InitStruct);

    I2C_Cmd(I2C1, ENABLE);
}

void I2C_Write(I2C_TypeDef* I2Cx, uint8_t addr, uint8_t reg, uint8_t data)
{
    I2C_GenerateSTART(I2Cx, ENABLE);
    while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT));

    I2C_Send7bitAddress(I2Cx, addr, I2C_Direction_Transmitter);
    while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

    I2C_SendData(I2Cx, reg);
    while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

    I2C_SendData(I2Cx, data);
    while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

    I2C_GenerateSTOP(I2Cx, ENABLE);
}

uint8_t I2C_Read(I2C_TypeDef* I2Cx, uint8_t addr, uint8_t reg)
{
    uint8_t data = 0;

    I2C_GenerateSTART(I2Cx, ENABLE);
    while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT));

    I2C_Send7bitAddress(I2Cx, addr, I2C_Direction_Transmitter);
    while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

    I2C_SendData(I2Cx, reg);
    while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

    I2C_GenerateSTOP(I2Cx, ENABLE);
    while (I2C_GetFlagStatus(I2Cx, I2C_FLAG_BUSY));

    I2C_GenerateSTART(I2Cx, ENABLE);
    while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT));

    I2C_Send7bitAddress(I2Cx, addr, I2C_Direction_Receiver);
    while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

    while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_RECEIVED));
    data = I2C_ReceiveData(I2Cx);

    I2C_GenerateSTOP(I2Cx, ENABLE);

    return data;
}

float MAX30205_ReadTemperature(void)
{
    uint16_t raw_temp = 0;
    float temp = 0;

    I2C_Write(I2C, MAX30205_ADDR, 0x01, 0x80);
    raw_temp = (I2C_Read(I2C, MAX30205_ADDR, 0x00) << 8) | I2C_Read(I2C, MAX30205_ADDR, 0x01);
    temp = (float)(raw_temp >> 3) * 0.0625;

    return temp;
}

int main(void)
{
    I2C_Configuration();

    while (1)
    {
        float temp = MAX30205_ReadTemperature();
        // 处理温度数据
    }
}

注意，以上代码示例仅用于参考，具体实现还需要根据自己的硬件平台和应用场景进行适当修改。