LSM6DSOW I3C IBI interrupt

[guess]

I test the LSM6DSOW I3C IBI interrupt, I set the accelerometer FIFO mode, and FIFO full, the interrupt is triggered, and I got payload from LSM6DSOW. What does this mean?

i:0,read value:0x1

i:1,read value:0x20

i:2,read value:0x5

i:3,read value:0x0

i:4,read value:0x0

i:5,read value:0x0

i:6,read value:0x0

i:7,read value:0x0

i:8,read value:0x0

 

[Federica Bossi]

Hi ​@guess ,

Yes — this IBI payload is status information, not raw accelerometer data.

• 0x20 likely indicates FIFO full
• the other bytes are interrupt/status bits
• the trailing 0x00s are usually just unused payload bytes

So the sensor is basically saying: “FIFO full interrupt occurred.”
Next step: read the FIFO status and drain/clear the FIFO.