LAOS Laser

I have built the cable mentioned under "Enabled laser PWM" http://redmine.laoslaser.org/projects/laos/wiki/HPC_LS3020_connections_-_July_2012 and connected it to my cutter. This gives full control over the laser's power from 0 to 20mA as expected, but the power output is inverted (so things that should be at 20mA are at 0mA, 15mA is at 5mA etc). When the cable is not plugged in at the LAOS end, the laser power is full 20mA as expected.

I'd like a config option for inverting the PWM signal would be perfect (so 100% power = 0 PWM Duty Cycle, 0% power = 100% PWM Duty Cycle).