I'm working on logging data from the ADXL345 accelerometer for a DIY physics project for a friend of mine (OK, it's for me too because it involves fun physics). I wasn't able to find a library for running the ADXL345 using Python, so I spent the day building one.
The code is over on Adafruit's forums, and it is very much a work in progress. I'm reading data from the board and it looks like I'm able to set configuration options pretty easily. Right now this is very much a hack in progress. There are parts lying all over the floor, it isn't portable and it isn't easily used.
The problem is that the ADXL reports acceleration using two eight-bit values. Here's the quick start sheet, here.
The first register uses all 8-bits to report data. The second register uses four of the bits to report data, the other four are used to report the "sign" of the data (positive or negative).
I can't, for the life of me, figure out how to make this data usable, elegantly.
No comments:
Post a Comment