Recording | 14
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14.4.2 USB device handling hints
Using the USB device
Always plug the USB device into vehicle before power up to ensure that all measurement
data is stored on the USB device.
If the USB device is plugged in after recording has started, only the current data is saved.
Data recorded on the C 80 before the USB device is plugged in will not be saved.
Removing the USB device
Always power off the system before unplugging the USB device!
14.4.3 Troubleshooting
When no data on the USB device is recorded:
Configure the measurement label usb_mediastate on a RaceCon measurement view or
on a C 80 display page.
The value of usb_mediastate reflects the operating condition of the USB bus:
State Description
0: Wait: Device not found The USB device is not found (also: waiting for re-plug stick).
No USB device inserted.
USB device is defect.
No electrical connection or wiring harness problem.
USB software upgrade not activated (Purchase of unlock code
needed).
1: Wait: Device detected An USB device is found, but not yet installed.
2: Ok: Media installed The USB device is found and is operational (idle).
This does not imply that recording data is written!
4: Stop: Device unplugged The USB device has been removed.
The C 80 performs a restart when an USB device is re-plugged
in.
5: Error: Media error The communication to the USB device broke down.
The USB device is defect.
The USB device is not supported by C 80.
6: Error: Media corrupt The USB device is not in valid BFS format.
(Hint: Re-format the USB device in RaceCon.)
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