lib_xud merges the existing sc_xud and lib_usb (a fork of sc_xud) and replaces them both. It includes an API that supports both previous libraries providing a unified and maintained library going forward.

The XMOS USB Device (XUD) library provides a low-level interface to USB. lib_xud is a software defined, industry-standard, USB library that allows you to control an USB bus via xCORE ports.

The library provides functionality to act as a USB device only.

This library is for use with xCORE-200 Series or xCORE-AI series devices only, previous generations of xCORE devices are no longer supported.

• USB 2.0 Full-speed (12Mbps) and High-speed (480Mbps)
• Device mode
• Bulk, control, interrupt and isochronous endpoint types supported

• SOF tokens are not CRC checked on XS3 based devices (see tests/test_sof_badcrc)
• Documentation not updated for removal of XS1 and addition of XS3 based devices

The CHANGELOG contains information about the current and previous versions. For a list of direct dependencies, look for DEPENDENT_MODULES in lib_xud/module_build_info.

The following application notes use this library:

• AN00125 - USB mass storage device class
• AN00126 - USB printer device class
• AN00127 - USB video device class
• AN00129 - USB HID device class
• AN00131 - USB CDC-EDC device class
• AN00132 - USB Image device class
• AN00124 - USB CDC VCOM device class
• AN00135 - USB Test and Measurement device class
• AN00136 - USB Vendor specific device