micro_climate/Drivers/Tmp117/tmp117.c

#include "tmp117.h"
#include "i2c.h"
#include "cmsis_os.h"


// <20><>ʼ<EFBFBD><CABC><EFBFBD>¶ȴ<C2B6><C8B4><EFBFBD><EFBFBD><EFBFBD>
HAL_StatusTypeDef TMP117_Init(void)
{
    // <20><><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5>
    uint8_t config_data[2] = {0x0C, 0x00};  // <20><><EFBFBD>ֽ<EFBFBD><D6BD><EFBFBD>ǰ,<2C><><EFBFBD><EFBFBD>ת<EFBFBD><D7AA><EFBFBD><EFBFBD>1100 0000 0000<30><30>12.5ms
    return HAL_I2C_Mem_Write(&hi2c1, TMP117_ADDR << 1, TMP117_CONFIG_REG,
                            I2C_MEMADD_SIZE_8BIT, config_data, 2, 100);
}

// <20>ӼĴ<D3BC><C4B4><EFBFBD><EFBFBD><EFBFBD>ȡ˫<C8A1>ֽ<EFBFBD><D6BD><EFBFBD><EFBFBD><EFBFBD>
HAL_StatusTypeDef TMP117_Read(uint8_t reg, uint8_t *buffer) {
    return HAL_I2C_Mem_Read(&hi2c1, TMP117_ADDR << 1, reg,
                           I2C_MEMADD_SIZE_8BIT, buffer, 2, 100);
}

static float calculateAverage(float arr[], int avgLength) {
    float sum = 0;
    
    // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飨<EFBFBD><E9A3A8><EFBFBD><EFBFBD>10<31><30>Ԫ<EFBFBD>أ<EFBFBD><D8A3><EFBFBD><EFBFBD>ռ<EFBFBD><D5BC><EFBFBD><EFBFBD><EFBFBD>ֱֵ<D6B5><D6B1><EFBFBD>ﵽָ<EFB5BD><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    for (int i = 0; i < 10; ++i) {
            sum += arr[i];
    }
    
    // <20><><EFBFBD><EFBFBD>ƽ<EFBFBD><C6BD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ
    float average = sum / avgLength;
    return average;
}
// <20><>ȡ<EFBFBD>¶<EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD>λ<EFBFBD><CEBB><EFBFBD>棩
#define COLLECT_DATA_NUM  10
HAL_StatusTypeDef TMP117_Get_Temp(float *temp)
{
    uint8_t raw_data[2] = {0};
    int16_t temp_raw;
    uint8_t ret_falt = 0;
    float ret_temp;
    float temp_temp[COLLECT_DATA_NUM] = {0};

    for(int i = 0; i<COLLECT_DATA_NUM; i++)
    {
        TMP117_Init();
        osDelay(20);
        if(TMP117_Read(TMP117_TEMP_REG, raw_data) != HAL_OK)
        {
            ret_falt++;
            temp_temp[i] = 0;
        }else
        {
            temp_raw = (raw_data[0] << 8) | raw_data[1];
            temp_temp[i] = temp_raw * 0.0078125f;
        }
        
    }
    if(ret_falt >= COLLECT_DATA_NUM)
    {
        *temp = 0;
        return HAL_ERROR;
    }
    
    ret_temp = calculateAverage(temp_temp, COLLECT_DATA_NUM - ret_falt);
    
    if(ret_temp <= -60)
    {
        *temp = -60;
    }else if(ret_temp >= 150)
    {
        *temp = 150;
    }else
    {
        *temp = ret_temp;
    }
    return HAL_OK;
}