Measurement mode entry requirements

Hello LMcKenzie thanks for the comprehensive explanation!

Does the ERR_USER_REGS switchs exactly when you change to measurement mode?

Here you have a snippet of a basic initialization of the FIFO just as an example:



hope this helps,

Mario SM

Thanks for your reply Mario,

The ERR_USER_REGS bit does appear to switch when we change to measurement mode.

status_pre is 0x40, which corresponds to the AWAKE bit being set in the STATUS register.

The status_post variable is 0xC0, which corresponds to both AWAKE and ERR_USER_REGS being set.

With WAKEUP mode enabled ( accel_spi_write(0x2D, 0x08 | 0x02) ), the ERR_USER_REGS bit is not set and the device produces data-ready interrupts every ~12.5Hz

I've not looked into configuring the FIFO buffer. Do you think this is necessary if we only use the data-ready interrupt?

Thanks,

Lachlan

Thanks for your reply Mario,

The ERR_USER_REGS bit does appear to switch when we change to measurement mode.

status_pre is 0x40, which corresponds to the AWAKE bit being set in the STATUS register.

The status_post variable is 0xC0, which corresponds to both AWAKE and ERR_USER_REGS being set.

With WAKEUP mode enabled ( accel_spi_write(0x2D, 0x08 | 0x02) ), the ERR_USER_REGS bit is not set and the device produces data-ready interrupts every ~12.5Hz

I've not looked into configuring the FIFO buffer. Do you think this is necessary if we only use the data-ready interrupt?

Thanks,

Lachlan

Hello LMcKenzie  Excuse the delay, attached you can find a working example with your desired configurations for Arduino Nano ESP32.

This one works just fine for me, with the EVAL-ADXL367Z with both VS and VDDIO tied together to 3.3V.

Let me know if this example helps debug your issue.

have a nice week,

Mario SM

ADXL367_Basic_startup.zip