I am trying to create a program for GPIO interrupt. Seems the High-level application code will not support IRQ. So I created a Real-time applicable application. When I try to run the HelloWorld example code(https://github.com/Azure/azure-sphere-samples/tree/main/Samples/HelloWorld/HelloWorld_RTApp_MT3620_BareMetal), I got an error saying "libusb_open() failed with LIBUSB_ERROR_NOT_FOUND". Is this error because I didn't connect an usb-to-serial adaptor or I don't install the software LIBUSB? Is it possible debug the real-time applicable application code without the usb-to-serial adaptor? Thanks.