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edited Jul 12, 2022 at 12:52

So I use accelerometer to get acceleration data. However, I have trouble understanding data. I have been reading manual, but it does not help me:

The measured acceleration data are sent to the OUTX_HOUTL_X, OUTX_LOUTH_X .....

The complete acceleration data for the X channel is given by the concatenation OUTX_HOUTL_X & OUTX_LOUTH_X
and is expressed as a 2’s complement number.

Acceleration data are represented as 12-bit numbers (left justified).

I understand the concept of 2s complement and left justified number spread in this case, however, I am unable to understand how to arrive at appropriate acceleration values.

The table with couple examples is also provided:

acc value               OUTL_X           OUTH_X
0 g                      0x00             0x00
343 mg                   0xE0             0x15
1004 mg                  0x00             0x40
-343 mg                  0x20             0xEA
-1004 mg                 0x00             0xC0

It would be really helpful if someone helped to figure out how do manufacturers of accelerometer arrive at these values. This is little endian.

So I use accelerometer to get acceleration data. However, I have trouble understanding data. I have been reading manual, but it does not help me:

The measured acceleration data are sent to the OUTX_H, OUTX_L .....

The complete acceleration data for the X channel is given by the concatenation OUTX_H & OUTX_L
and is expressed as a 2’s complement number.

Acceleration data are represented as 12-bit numbers (left justified).

I understand the concept of 2s complement and left justified number spread in this case, however, I am unable to understand how to arrive at appropriate acceleration values.

The table with couple examples is also provided:

acc value               OUTL_X           OUTH_X
0 g                      0x00             0x00
343 mg                   0xE0             0x15
1004 mg                  0x00             0x40
-343 mg                  0x20             0xEA
-1004 mg                 0x00             0xC0

It would be really helpful if someone helped to figure out how do manufacturers of accelerometer arrive at these values

So I use accelerometer to get acceleration data. However, I have trouble understanding data. I have been reading manual, but it does not help me:

The measured acceleration data are sent to the OUTL_X, OUTH_X .....

The complete acceleration data for the X channel is given by the concatenation OUTL_X & OUTH_X
and is expressed as a 2’s complement number.

Acceleration data are represented as 12-bit numbers (left justified).

I understand the concept of 2s complement and left justified number spread in this case, however, I am unable to understand how to arrive at appropriate acceleration values.

The table with couple examples is also provided:

acc value               OUTL_X           OUTH_X
0 g                      0x00             0x00
343 mg                   0xE0             0x15
1004 mg                  0x00             0x40
-343 mg                  0x20             0xEA
-1004 mg                 0x00             0xC0

It would be really helpful if someone helped to figure out how do manufacturers of accelerometer arrive at these values. This is little endian.

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asked Jul 12, 2022 at 12:52

Jokubas11

Understanding data received from sensor (Twos complement)

So I use accelerometer to get acceleration data. However, I have trouble understanding data. I have been reading manual, but it does not help me:

The measured acceleration data are sent to the OUTX_H, OUTX_L .....

The complete acceleration data for the X channel is given by the concatenation OUTX_H & OUTX_L
and is expressed as a 2’s complement number.

Acceleration data are represented as 12-bit numbers (left justified).

I understand the concept of 2s complement and left justified number spread in this case, however, I am unable to understand how to arrive at appropriate acceleration values.

The table with couple examples is also provided:

acc value               OUTL_X           OUTH_X
0 g                      0x00             0x00
343 mg                   0xE0             0x15
1004 mg                  0x00             0x40
-343 mg                  0x20             0xEA
-1004 mg                 0x00             0xC0

It would be really helpful if someone helped to figure out how do manufacturers of accelerometer arrive at these values

sensors acceleration