The Device Firmware Upgrade (DFU) library provides functionality to facilitate firmware updates over almost any transport physical layer. It includes support for handling DFU packets, managing firmware images, and ensuring the integrity of the update process.

• One upgrade slot
• Support USB DFU spec v1.1
• Support for custom transport layers
• Flash memory management

• USB example reports several warnings such as "port "XS1_PORT_1F" on tile[0] is not connected to any pins in this package.", this is normal on small packages that do not have all the pins brought out.
• The lib_device_control client handling currently consumes an additional thread as it is not distributable.
• For DFU over I2C the bus speed of up to 100kbps is supported. This is also supported with no clock stretching for all commands except upload.
• For DFU over I2C, when exiting from DFU mode, the device reboots which interrupts the host communications, the host reports an error, but this does not affect the result.

• lib_dfu (https://www.github.com/xmos/lib_dfu)

• XMOS XTC Tools: 15.3.1 or later

• lib_logging (https://www.xmos.com/libraries/lib_logging)
• lib_xassert (https://www.xmos.com/libraries/lib_xassert)

• AN02019 - Device Firmware Upgrade over USB (https://www.xmos.com/application-notes/an02019)

This package is supported by XMOS Ltd. Issues can be raised against the software at www.xmos.com/support or using GitHub issues.