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c#uwpgpio

UWP App GpioController.GetDefault() always returns null

What can be the reason that in my App GpioController.GetDefault() always returns null? The app is running on a RPI3b (as other Apps have done before.... never ran into this?!) 

var gpioController = GpioController.GetDefault();
// gpio controller is null ... why?!
ServiceContainer.Instance.Register(new IO(gpioController));;
Solution

  • Found the issue. It was in Windows IoT configuration itself. There is a "default controller driver" in the devices tab. It was set to a DMA driver. Changing it to "Inbox driver" and rebooting the Pi solved the problem.