Well I tried some 47 ohm resistors, but no luck. The registers are returning different values now, but they are still incorrect values.
I realize the resistors are closer to the adxl362 than the imp on clock/mosi, but I did shorten the leads from 8" to about 3". I’m not sure how to get any closer unless I flip the headers on the imp so I can stick it in the breadboard directly, and trim the leads on those resistors. I can try that tomorrow, but I don’t know how significant that is to the circuit. If it can’t work with more than an inch of wire, I’m kinda wondering why they would sell these packaged as breakouts at all?
Are those connector blocks just a bad idea on SPI circuits? Should I try getting rid of those altogether?
Thanks guys
EDIT - I’ve been digging around on SPI and line capacitance, and most people talk about maximum line lengths around five meters operating in the 10MHz+ range, so I’m fairly certain that’s not the problem. I did hear of people using larger resistors (120-200 ohm). Should I try that or are the connectors a more likely solution?
Here’s where I’m at now:
