STM32 CubeMX HAL库使用SGP30获取CO2和VOC

1、说明

（1）MCU为STM32F103C8，模块为SGP30；（2）硬件连接：SGP30连接STM32的IIC1；（3）SGP30的设备地址为：(0x58<<1); （4）程序中使用HAL库，代码有CubeMX生成；

2、程序

驱动头文件：sgp30.h

#ifndef __SGP30_H_
#define __SGP30_H_

#include "stdbool.h"
#include "string.h"

#include "main.h"
#include "tim.h"
#include "usart.h"
#include "gpio.h"

HAL_StatusTypeDef sgp30_init();
HAL_StatusTypeDef sgp30_sample(float *co2, float *tvoc);

#endif

驱动主文件：sgp30.c

#include "sgp30.h"
#include "i2c.h"
#include "utils.h"
#include "SEGGER_RTT.h"

#define SGP30_ADDR (0x58<<1)

//init sensor
HAL_StatusTypeDef sgp30_init()
{
    uint8_t data[2];

    //iaq init
    data[0]=(0x2003)>>8;
    data[1]=(0x2003) & 0x00FF;
    return HAL_I2C_Master_Transmit(&hi2c1,SGP30_ADDR,data,2,50);
}

//get data sample
HAL_StatusTypeDef sgp30_sample(float *co2, float *tvoc)
{
    uint8_t data[2];
    uint8_t readbuff[6];

    //measure iaq
    data[0]=(0x2008)>>8;
    data[1]=(0x2008) & 0x00FF;

    if(HAL_I2C_Master_Transmit(&hi2c1,SGP30_ADDR,data,2,50) != HAL_OK){
        SEGGER_RTT_printf(0, "write cmd m_iaq error\r\n");
        return HAL_ERROR;
    }

    //waite data ok
    int timeout = 10;
    while(1){
        if(HAL_I2C_Master_Receive(&hi2c1,SGP30_ADDR0x01,readbuff,6,50) != HAL_OK){
//          SEGGER_RTT_printf(0, "recv data error\r\n");
            timeout--;
            HAL_Delay(5);
        }else{
            break;
        }

        if(timeout<=0){
                return HAL_ERROR;
//              break;
        }
    }

    //check crc
    if(CheckCrc8(readbuff, 0xFF) != readbuff[2]  CheckCrc8(&readbuff[3], 0xFF) != readbuff[5])
  {
        return HAL_ERROR;
    }

    *co2 = (readbuff[0]<<8)readbuff[1];
    *tvoc=(readbuff[3]<<8)(readbuff[4]);

    return HAL_OK;
}

在main主文件进行调用：

初始化

if(sgp30_init() != HAL_OK){
    SEGGER_RTT_printf(0, "sgp30 init error\r\n");
}else{
    SEGGER_RTT_printf(0, "sgp30 init ok\r\n");
}

获取数据

if( sgp30_sample(&co2, &tvoc) != HAL_OK){
    SEGGER_RTT_printf(0, "sgp30 samle error\r\n");
}

char co2str[6] = {0};
char tvocstr[6] = {0};
sprintf(co2str, "%.2f", co2);
sprintf(tvocstr, "%.2f", tvoc);
SEGGER_RTT_printf(0, "co2:%s, tvoc:%s\r\n", co2str, tvocstr);