SPI support?

[pslade2]

I saw that there is an Arduino SPI library for this device. Are there plans to support SPI for this sensor in python as well?

[ladyada]

we haven't gotten to it, but if you'd like to help we'd love a hand :)

[sakethramanujam]

I'd like to contribute upon some additional details and understanding. Is there a place that I can start?

[ladyada]

@sakethramanujam you would need a sensor, do you have one?

[sakethramanujam]

I'd need a sensor. Where can I procure one from?

[ladyada]

we sell them at adafruit, but you could get them anywhere as long as its an LSM6DS series

[sakethramanujam]

Trying to find one at my local store and on e-stores.

[EDIT]
I'm sorry for a delayed response, I could not find the component on local stores.

[jposada202020]

@pslade2 hello, any luck getting the sensor? thanks. :)

[drewskoots]

Any update on this?

[rjsdotorg]

I have a 4517 and 4565, currently wired for I2C and running.
Pi zero 2 W BTW.
Once I work out some other things I will need to go to SPI, as the bandwidth for 9 channels + temp at max rates eat up I2C.
I went from Pico to Pi Zero2 W as I found that the Pico struggles to just sample and save data at high rates.

I checked out the LSM6DS code atGithub but as I posted here https://forums.adafruit.com/viewtopic.php?p=1049398#p1049398 " I'm not following (yet) how self.i2c_device is even used as it does not seem to be referenced"

[rjsdotorg]

There is also an issue mentioned elsewhere of getting (near) simultaneous data from the two chips. It could use a helper function to grab all board data in one go, and document corresponding DRDY wire connection. At St there is some posting on this, like https://community.st.com/t5/mems-sensors/lsm6dsl-int2-lt-gt-lis3mdl-drdy-short-circuit/m-p/775622

Related to this, I2C "Fast Mode" appears to be 400kHz on the Pi driver, but the ST part supports "I²C fast mode +" of 1MHz, and this https://www.abelectronics.co.uk/kb/article/1/i2c-part-2-enabling-i2c-on-the-raspberry-pi, and the Camera Module docs, implies that the Zeros might be able to run at 1MHz. I'll try to test.

[rjsdotorg]

FYI, I just added frequency=1000000 to the busio.I2C call, and I now can call for all 9 values in a tight loop ~1440/s while storing in a ulab array.
This compares to ~850/s with frequency=400_000, so the Pi Zero 2 W is doing I2C faster.

BTW the Pi Zero 2 W does show as "raspberrypi_zero2w" in board.board_id, but adafruit_platformdetect.Detector() returns None for id and board.