Motors aren't working in C++

[dsharlet]

I can't seem to get the motors to do anything with the C++ language bindings. This includes trying to use the demo to run/stop motors. I've connected 3 motors to my EV3 (two large tacho and one medium tacho). Am I missing something basic? I tried fiddling with the modes a bit to get something to happen, with no luck. At least to start with, I'm just trying to get a motor to spin indefinitely.

I've also tried simply echoing stuff into the files in /sys/class/tach-motor/motorn/... Nothing seems to happen.

Everything else seems to work, I can read the position from the tacho (it changes if I manually rotate the axle).

[dsharlet]

Never mind... I figured this out. The duty cycle (setpoint) defaults to 0.