Remote Usb Operation - ARM MPS2 Technical Reference Manual

3.2

Remote USB operation

You can control the Motherboard Configuration Controller (MCC) through the USB 2.0 configuration
port.
To enable remote USB operation, you must set the USB_REMOTE parameter in the
• TRUE to enable the remote USB feature.
• FALSE to disable the feature.
You initiate a command by putting a file into the USBMSD root directory through the USB port. You can
reboot the system, reset the system, or shut down the system by using one of the following filenames:
•
reboot.txt
•
reset.txt
•
shutdown.txt
The MCC detects the presence of the files, performs the requested command, and deletes the file.
In versions 1 and 2 of the firmware, the contents of the files have no effect. They can be empty files.
In version 3 of the firmware, the contents of the files have an effect. The software performs reboot,
shutdown, and reset by checking for a particular string in the text file on the USB drive. The string must
be written at the start of the text file:
•
reboot.txt
•
reset.txt
•
shutdown.txt
Related information
1.3 Location of components on the MPS2 FPGA Prototyping Board on page 1-17
1.4 Location of components on the MPS2+ FPGA Prototyping Board on page 1-19
2.5 USB 2.0 Full Speed interface on page 2-29
5.4 USB 2.0 connector on page 5-83
100112_0200_09_en
.
.
.
Note
must contain "hsyxhj".
must contain "jkmcgx".
must contain "bmqjfe".
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Non-Confidential
3 Configuration
3.2 Remote USB operation
file to:
config.txt
3-51