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lsm6dsl功耗问题

avatar wfagly_dtt 提问时间: 2023-08-14 14:00:03 / 已解决

lsm6dsl在应用手册显示,高性能模式的功耗是0.6mA,但我在实际使用过程中,功耗达到2mA。

在3.3V电压下,一以下是我的配置

/**
 * @brief  Initialize the LSM6DSL sensor
 * @param  pObj the device pObj
 * @retval 0 in case of success, an error code otherwise
 */
int32_t LSM6DSL_Init(void)
{
  /* Enable register address automatically incremented during a multiple byte
  access with a serial interface. Enable IF_INC */
  if (lsm6dsl_auto_increment_set(PROPERTY_ENABLE) != LSM6DSL_OK)
  {
    return LSM6DSL_ERROR;
  }

  /* Enable BDU */
  if (lsm6dsl_block_data_update_set(PROPERTY_ENABLE) != LSM6DSL_OK)
  {
    return LSM6DSL_ERROR;
  }

  /* FIFO mode selection. LSM6DSL_STREAM_MODE*/
  if (lsm6dsl_fifo_mode_set(LSM6DSL_BYPASS_MODE) != LSM6DSL_OK)
  {
    return LSM6DSL_ERROR;
  }

  /* Full scale selection. */
  if (lsm6dsl_xl_full_scale_set(LSM6DSL_2g) != LSM6DSL_OK)
  {
    return LSM6DSL_ERROR;
  }

  /* Full scale selection. LSM6DSL_2000dps*/
  if (lsm6dsl_gy_full_scale_set(LSM6DSL_2000dps) != LSM6DSL_OK)
  {
    return LSM6DSL_ERROR;
  }  

  /* Output data rate selection - LSM6DSL_GY_ODR_104Hz */
  if (lsm6dsl_gy_data_rate_set(LSM6DSL_GY_ODR_104Hz) != LSM6DSL_OK)
  {
    return LSM6DSL_ERROR;
  }

  /* Output data rate selection - LSM6DSL_XL_ODR_104Hz */
  if (lsm6dsl_xl_data_rate_set(LSM6DSL_XL_ODR_104Hz) != LSM6DSL_OK)
  {
    return LSM6DSL_ERROR;
  }
  return LSM6DSL_OK;
}

发现一但配置频率,对加速度计没有影响,但是磁力计配置之后,功耗直线上升,这是什么原因呢?

2个回答
  • avatar wfagly_dtt
    回答时间: 2023-08-14 14:22:01

    在关闭该传感器或者注释掉频率配置也会少2mA功耗。 /* Output data rate selection - power down. */ // if (lsm6dsl_gy_data_rate_set(LSM6DSL_GY_ODR_52Hz) != LSM6DSL_OK) // { // return LSM6DSL_ERROR; // } // /* Output data rate selection - power down. LSM6DSL_XL_ODR_104Hz */ // if (lsm6dsl_xl_data_rate_set(LSM6DSL_XL_ODR_52Hz) != LSM6DSL_OK) // { // return LSM6DSL_ERROR; // }

  • avatar st_yujie2510
    回答时间: 2023-08-14 14:41:36

    您硬件连接了中断管脚吗?开了中断功能吗?如果有的话,建议关闭中断功能或是断开中断连接看看

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