LSM9DS0轴方向和读数是倒置的吗？

我问了同样的事情，但这是一个无用的论坛。
 
 
/public/STe2ecommunities/mems_sensors/Lists/Accelerometers/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mems_sensors/Lists/Accelerometers/LSM303D%20Z-axis%20Direction&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580004224A862E061BB4BADDEF313D70857E6¤tviews = 17
 
 注意：原始帖子包含大量线程对话，只能迁移到第9级



以下为原文




I have asked same thing, but this is a useless forum.


/public/STe2ecommunities/mems_sensors/Lists/Accelerometers/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mems_sensors/Lists/Accelerometers/LSM303D%20Z-axis%20Direction&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580004224A862E061BB4BADDEF313D70857E6¤tviews=17
  
Note: the original post contained a large number of threaded conversations and was only able to be migrated to the 9th level

你好，
 
 
 你在使用linux驱动吗？
 
 如果是，则必须使用init数据：
 
 #if defined（CONFIG_LSM9DS0）
 static struct lsm9ds0_acc_platform_data lsm9ds0_acc_data = {
 .fs_range = LSM9DS0_ACC_FS_2G，
 .rot_matrix = {
 {1,0,0}，
 {0,1,0}，
 {0,0,1}，
 }，
 .poll_interval = 500，
 .min_interval = LSM9DS0_ACC_MIN_POLL_PERIOD_MS，
 .aa_filter_bandwidth = ANTI_ALIASING_773，
 
 .gpio_int1 = 149，
 .gpio_int2 = 151，
 };
 
 static struct lsm9ds0_mag_platform_data lsm9ds0_mag_data = {
 .poll_interval = 500，
 .min_interval = LSM9DS0_MAG_MIN_POLL_PERIOD_MS，
 .fs_range = LSM9DS0_MAG_FS_2G，
 .rot_matrix = {
 {1,0,0}，
 {0,1,0}，
 {0,0,1}，
 }，
 };
 
 static struct lsm9ds0_gyr_platform_data lsm9ds0_gyr_data = {
 .poll_interval = 500，
 .min_interval = LSM9DS0_GYR_MIN_POLL_PERIOD_MS，/ * 2ms * /
 .fs_range = LSM9DS0_GYR_FS_250DPS，
 
 / *用于中断垫的gpio端口* /
 .gpio_int1 = 152，
 .gpio_int2 = 153，/ * int for fifo * /
 
 .axis_map_x = 0，
 .axis_map_y = 1，
 .axis_map_z = 2，
 .negate_x = 0，
 .negate_y = 0，
 .negate_z = 0，
 };
 
 static struct lsm9ds0_main_platform_data lsm9ds0_acc_mag_data = {
 .pdata_acc =＆amp; lsm9ds0_acc_data，
 .pdata_mag =＆amp; lsm9ds0_mag_data，
 };
 #endif / * CONFIG_LSM9DS0 * /



以下为原文





Hello,


are you using the linux driver?

If yes you must play with the init data:

#if defined(CONFIG_LSM9DS0)
static struct lsm9ds0_acc_platform_data lsm9ds0_acc_data = {
    .fs_range = LSM9DS0_ACC_FS_2G,
    .rot_matrix = {
       {1, 0, 0},
       {0, 1, 0},
       {0, 0, 1},
    },
    .poll_interval = 500,
    .min_interval = LSM9DS0_ACC_MIN_POLL_PERIOD_MS,
    .aa_filter_bandwidth = ANTI_ALIASING_773,

    .gpio_int1 = 149,
    .gpio_int2 = 151,
};

static struct lsm9ds0_mag_platform_data lsm9ds0_mag_data = {
    .poll_interval = 500,
    .min_interval = LSM9DS0_MAG_MIN_POLL_PERIOD_MS,
    .fs_range = LSM9DS0_MAG_FS_2G,
    .rot_matrix = {
       {1, 0, 0},
       {0, 1, 0},
       {0, 0, 1},
    },
};

static struct lsm9ds0_gyr_platform_data lsm9ds0_gyr_data = {
    .poll_interval =  500,
    .min_interval = LSM9DS0_GYR_MIN_POLL_PERIOD_MS, /* 2ms */
    .fs_range = LSM9DS0_GYR_FS_250DPS,

    /* gpio ports for interrupt pads */
    .gpio_int1 = 152,
    .gpio_int2 = 153,    /* int for fifo */

    .axis_map_x = 0,
    .axis_map_y = 1,
    .axis_map_z = 2,
    .negate_x = 0,
    .negate_y = 0,
    .negate_z = 0,
};

static struct lsm9ds0_main_platform_data lsm9ds0_acc_mag_data = {
    .pdata_acc = &lsm9ds0_acc_data,
    .pdata_mag = &lsm9ds0_mag_data,
};
#endif /* CONFIG_LSM9DS0 */

我觉得你误会了什么。
 
加速度计测量相对于自由落体参考系的加速度。也就是说，如果加速度计处于自由落体状态，则可以测量零加速度。相对于此，当加速度计在桌面上平放时，加速度计以1 g的速度向上加速。因此，您将读取+1 g。



以下为原文





I think you've misunderstood something.

The accelerometer measures acceleration relative to the free fall reference frame. That is, if the accelerometer had been in free fall, you would measure zero acceleration. Relative to this, the accelerometer is accelerating upwards at a rate of 1 g when it is flat on your desk.. Therefore you will read +1 g.