BME680 timestamps

[t_engel]

Hi,

I've been trying to get the BME680 to work with BSEC for a while now on a TI CC1352R device (M4F, gcc). I seem to struggle with the timings. The timestamp I am feeding to bsec_sensor_control is e.g. 406000000. The sensor_settings.next_call is returned as 406003000. As the timestamp is in ns as indicated in the docs, the delta seems to be 3µs compared to the 3secs I would expect. Obviously I am getting BSEC_W_SC_CALL_TIMING_VIOLATION with my timings being off.

Any help where I might be misunderstanding something? Any additional information that might help helping me?

The config I use is coming from generic_33v_3s_4d, code is based on BSEC_1.4.8.0_Generic_Release,  the driver is v3.5.10 as indicated.

Thanks.

Tobi

[t_engel · Accepted solution]

Leaving the root cause here in case someone eventually has a similar issue: By mistake I used the M4F library instead of the M4 one which would have been correct for my core.

It might be a good thing to check for the presence of the FPU during initialization in the M4F library and return an error in case it is not present.