3.11.6. dfu - device firmware update

3.11.6.1. Usage

dfu DESC

3.11.6.2. Synopsis

Turn's the USB host into DFU mode (Device Firmware Mode) and accepts
a new firmware. The destination is described by DESC in the format

DEVICE(NAME)[src]...

Here '(' and ')' are literal characters. The '[' and ']' however denote
one of the following optional modes:
's': safe mode (download the complete image before flashing);
'r': readback of the firmware is allowed;
'c': the file will be created (for use with regular files).