Posted on March 28, 2014 at 14:02Hi,
I received a couple of LIS3 samples last week and I'm using them in order to gain a little experience in the field of magnetometers.
I managed to install the chip on top of a plastic pen in order to use it as a magnetic ''probe''. As i get near a magnet, I see a component of magnetic field rising to full scale. That's great but I noticed that the value remains in a sort of memory even if I reset o power cycle the device. Is this correct?
Configuration for ctrl_registers:
1-0x5c
2-0x40
3-0x00
4-0x08
5-0x00
Reading data is done by:
outXL=i2c_smbus_read_byte_data(fh,OUTXL);
usleep(50000);
outXH=i2c_smbus_read_byte_data(fh,OUTXH);
usleep(50000);
outX=(outXH<<8)|outXL;
Output:
47
Status ff
rX 0.7050
rY -12.0000
rZ -0.1743
48
Status ff
rX 0.6984
rY -12.0000
rZ -0.1761
As you can see, Y components remains ''high'' after getting close to a magnet, even if I put the sensor far from it.
Thank you in advance.
Best regards.
