We need to add a small delay between exposures because our 2D camera is not ready to capture a new frame before 400us after the last exposure ended. We've tried increasing the frametime to 8733, leaving exposure at 8333. This works fine if we make sure not to send any usb-commands, but if we start writing usb-commands to toggle GPIO-pins while running with this timing, the dlpc350 locks up. sometimes we need to power-cycle, other times it is enough to hit reset i lightcrafter gui.
The usb-communication works fine with exposure-time == frame-time, or frame-time exactly equal to exposure-time+230us (as per manual).
Higher delays like frame time = 16ms, exposure=8.333ms also gives same issue when sending usb-commands.
Is this a known bug, is there a workaround?