How to detect crash using BMI 323?

[gunbu99]

hello

I'm trying to detect crash using bmi 323.

I used anymotion feature but it doesn't work as I thought

I think when crash occurs, imu's accelerometer may be 4g.  

therefore I set registers below

// use feature engine

FEATURE_IO2 = 0x012C

FEATURE_IO_STATUS = 0x0001

FEATURE_CONTROL = 0x0001

// normal mode on

ACCL_CONF = 0x42a8 //acc_mode = normal mode, bw : odr/4, acc_range : 8g, acc_odr :100Hz

GYRO_CONF = 0x0000

// any motion setting

EXT_ANYMO_1 = 0x1800 // acc_thres : 4g

FEATURE_IO0 = 0x0038 // any motion x,y,z int enable

FEATURE_IO_STATUS = 0x0001

// interrupt

INT_MAP1 = 0x0004 // interrupt mapping, any motion out: INT1

IO_INT_CTRL = 0x0005 // INT1 active high, push-pull, enable

GEN_SET_1 = 0x0011 // event report mode enable, interrupt hold time duration : 40ms

it doesn't work. there's no interrupt while I swing board with imu

if acc_thres is under 10/512g, interrupt happen

I don't understand why this works like that

plz help me. I want to detect crash using  bmi 323

[FAE_CA1]

Hi,

Please see the attached C file and screenshot of BMI323 accel. We can see any-motion working fine on our side.

Thanks.

[Minhwan_Oh]

Hi @gunbu99, 

To solve your issue, let's check step by step.If you set to 10/512g, you should get any motion interrupt very easily.

Surely, your current situation is not normal and your register setting info shouldn't be enough.

Which environment are you using it? Software, Hardware.

1) Are you using our EVM board and shuttle board for bmi323?

     - If you are using our EVM board ( app3.x + BMI323 shuttle board), are you using COINES or DD2.1?

     - If you aren't using our EVM board, are you using our API as @FAE_CA1  mentioned? The attahced file is our any motion example code to test 4G threshold and should work for you.

          - If you aren't using our API, can you provide your whole code for BMI323? You can't run it properly using only above code.

          - I also can't see your duration for any motion in your code. You can test it with low value of duration.

Thank you.