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    Best posts made by Li YiFan

    RE: OpenIMU330BI 1PPS usage

    Hi PineTreeWild,
    It will take less than 10s to finish the sync with 1PPS in the begining.
    The sync process is that:

    • CPU detects sync pulse and measures it’s period with sub-microsecond precision

    • If period is within 0.01% of target value for few consecutive periods signal considered to be valid and system will sync to it.

    posted in The OpenIMU Family •
    Why the factory don't do the magnetometer calibration before openimu300 unit release to customer? How to do the openimu300 unit magnetometer calibration?

    Because of the application scenarios diversity, the electromagnetic environments are different, therefore the openimu300 magnetometer sensor should be calibrate accordingly. For instance, user could calibrate magnetometer sensor in application INS/VG-AHAS downloading from aceinna VS code example.

    User could do mag calibration following the instructions through openimu300 user serial interface:
    Mag Align Commands:
    55 55 6D 61 01 00 F1 2E – Mag-Align Status
    55 55 6D 61 01 01 E1 0F – Start Mag-Align (autoend)
    55 55 6D 61 01 02 D1 6C – Start Mag-Align (w/o autoend)
    55 55 6D 61 01 03 C1 4D – Stop Mag-Align (w/o autoend)
    55 55 6D 61 01 04 B1 AA – Accept Mag-Align Results (temp)
    55 55 6D 61 01 05 A1 8B – Accept Mag-Align Results (write to eeprom)
    55 55 6D 61 01 06 91 E8 – Abort Mag-Align
    55 55 6D 61 01 07 81 C9 – Get stored values
    55 55 6D 61 01 08 70 26 – Restore Mag-Align Defaults

    posted in The OpenIMU Family •
    RE: Why the factory don't do the magnetometer calibration before openimu300 unit release to customer? How to do the openimu300 unit magnetometer calibration?

    @Amin Hi Amin, you could send command to 300ZI unit via User uart interface(VG_AHRS, INS appication), and get the debug log from debug uart interface as below. As for the debug port, OpenIMU user could refer to UART debug port.

    bbc0f102-c4ab-4c82-b065-25eccca311f2-image.png

    posted in The OpenIMU Family •