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Revision 01 - 22.07.2019
Normal mode
Data is transmitted and read from the CAN bus in normal
mode on both sides.
Loopback mode
The device will transmit data to the CAN bus and listen to
itself at the same time.
Packets from the CAN bus will not reach the device.
Packets from the device go to the CAN bus.
Silent loopback mode
In this mode, all packets will be returned to the device
without going to the CAN bus.
From the CAN bus, accordingly, no data packet will
reach the device.
Suitable for debugging device without physically
connecting to the CAN bus.
Now let's move on to the settings of CAN filters. Filters are needed to filter out the unnecessary data
from the huge flow of information coming from the vehicle's CAN bus, thereby reducing the load on the
processor.
If no filter is enabled, this is equivalent to the fact that this CAN bus is disabled.
CAN ID type
–
11 bits standard or 29 bits extended. In standard mode you may specify up to four
sensors ID in the one filter, but in extended mode - no more than two.
CAN filter type
–
«
By the list
»
or
«
By the mask
». «
By the list
»
means that in fields ID1, etc. specific
frame IDs will simply be indicated. If you choose the type
«
By the mask
»,
then the lower ID fields will turn
into “mask” fields, where you can set a
mask for a whole group of frames.
With the selected “
extended
” CAN
ID type, there will be only one mask.