Allow control of the HOME button led

[sm-Fifteen]

Why not?

It can't be sent in the same packet as haptic feedback data, but it can be adjusted as a percentage value. Whether this can be done with an acceptable or predictable latency remains to be seen, however, there seems to be a delay of at least half a second when using the Big Picture configurator.

[sm-Fifteen]

Note that the method for setting led color/intensity, just like the one for setting rumble intensity, seems to have an nFlags byte reserved, which is probably what that unused byte is for (with intensity being a uint8).

void SetLEDColor( ControllerHandle_t controllerHandle, uint8 nColorR, uint8 nColorG, uint8 nColorB, unsigned int nFlags )

[sm-Fifteen]

Maybe have an option in the parameters to specify a channel as the LED control one. Variations of the volume on that channel would change the LED accordingly. This would be rather convenient too, since both values are expressed in percents.