TS-7250-V3 Magnetometer

From Technologic Systems Manuals

This board includes an ST IIS2MDCTR 3 axis magnetometer.

The magnetometer is accessed through Linux's industrial IIO framework as lis2mdl_magn with channels:

  • magn_x
  • magn_y
  • magn_z
  • timestamp

For example:

root@tsimx6ul:~# iio_attr -c lis2mdl_magn -c magn_x
dev 'lis2mdl_magn', channel 'magn_x' (input), attr 'raw', value '630'
dev 'lis2mdl_magn', channel 'magn_x' (input), attr 'scale', value '0.001500'
root@tsimx6ul:~# iio_attr -c lis2mdl_magn -c magn_y
dev 'lis2mdl_magn', channel 'magn_y' (input), attr 'raw', value '-165'
dev 'lis2mdl_magn', channel 'magn_y' (input), attr 'scale', value '0.001500'
root@tsimx6ul:~# iio_attr -c lis2mdl_magn -c magn_z
dev 'lis2mdl_magn', channel 'magn_z' (input), attr 'raw', value '9'
dev 'lis2mdl_magn', channel 'magn_z' (input), attr 'scale', value '0.001500'

This shows a snapshot of the x, y, z values. To get the real world value, multiply the scale * the raw value. In this case:

  • X: 0.945 mG (milligauss)
  • Y: -0.2475 mG
  • Z: 0.0135 mG