There are two packages for Rockey4:

1.	The one in the directory "libusb_driver" uses libusb driver. The driver is independent of the kernel of linux, But it only supports Rockey4 with USB,and no shell code tool.

2.	The one in the directory "kernel_driver" uses kernel module driver. It supports Rockey4 with both USB and parallel port, and it also has shell code tool. But the driver is dependent of your kernel of linux. If your linux kernel can not support this package, we could compile a new package for you.

If you need use Rockey4 with parallel port or you need use shell code tool, you must use the package with kernel driver. Or you could use package with libusb driver.
