IIS2DH轴Z无法正常工作

大家好，

当我尝试从中汇集数据时，我遇到了IIS2DH加速度计的问题。
我的设置是：
STM32L442使用SPI接口连接到IIS2DH，并通过USART将数据发送到Tera Term（使用FTDI电缆）。

首先，我有一个小的初始化过程，根据我的需要设置芯片：
启用400Hz，X Y和Z轴，+ -2G刻度，高分辨率，SPI 4线，BDU。

然后我读了所有6个控制寄存器和“我是谁”注册，检查一切是否正常，我在Tera Term上显示结果。正如所料，一切都很好。

但是，当我从输出寄存器（OUT_X_L，OUT_X_H，...）汇集数据时，它仅适用于X和Y轴...

一旦存储了来自多个寄存器的数据，就会有一个小序列从每个轴的高和低寄存器构造16位有符号整数，然后将16位向右移位以仅保留前12位（HR模式）最后我通过USART发送数据（使用atoi（）函数将数据转换为字符串）。
但正如我所说，它适用于X和Y轴，但不适用于Z轴。我没有找到与-1g相对应的东西（或12位刻度的-1024），而是读取了近-2g（-2039）。
有时当我碰到传感器时，Z轴稍微移动但不符合正常操作。

有没有人遇到过这类问题？

感谢您的帮助！
马克西姆



以下为原文

Hello everyone,

I have an issue with the IIS2DH accelerometer when I try to pool data from it.
My setup is:
STM32L442 connected to the IIS2DH using SPI interface and sending data through USART to Tera Term (using a FTDI cable).

First I have a small initialization process which sets up the chip following my needs:
400Hz, X Y and Z axis enabled, +-2G scale, high resolution, SPI 4 wires, BDU.

Then I read all the 6 control registers and the "who I am" register to check if everything is ok and I display the results on Tera Term. All works nicely, as expected.

However, when I pool data from output registers (OUT_X_L, OUT_X_H, ...) it works only for X and Y axis...

Once data from the several registers are stored, there is a small sequence which constructs the 16-bit signed integers from the high and low regisiters of each axis, then it shifts the 16 bits to the right to keep only the first 12 bits (HR mode) and finally I send the data through USART (using atoi() function to convert the data into strings).
But as I said, it works perfectly for the X and Y axis, but not for the Z axis. Instead of having something corresponding to -1g (or -1024 on a 12 bit scale), I read almost -2g (-2039).
Sometimes when I hit the sensor, the Z axis moves a little bit but it does not correspond to normal operating.

Has anyone ever encountered this type of problem?

Thank you for your help!
Maxime