SNS - Optical Flow Sensor (HYPE-33)

[ishmis]

This implements the exact logic defined in:
https://github.com/pimoroni/pmw3901-python/blob/main/pmw3901/__init__.py

WIP

Also closes HYPE-57.

[linear]

HYPE-33 Implement Optical Flow

[linear]

HYPE-57 Hardware SPI

[ishmis]

Minor things. @prakhars0206 iirc, the optical flow sensor was not soldered properly, can you confirm if that has been fixed?

Ideally you want to get to to the stage of testing the code asap with the actual sensor.

[ishmis]

has this been tested with the sensor yet?

[davidbeechey]

Things to try next:

• 400 kHz SPI frequency
• make sure there is a sleep between power up and secret sauce
• setting rotation
• using transfer not transfer in place?

[davidbeechey]

Tested and working 20/20/25 :)

Main problem I think was the CS line not being used. We had additional logic errors and MSB/LSB mixup which were resolved.

Supports:

• get_motion
• set_orientation
• set_rotation

[TomLonergan03]

doubling the number of comments lmao