CANFDNET-400U
High-performance Four-channel CANFD Bus-to-Ethernet Converter User Manual
©2021 Guangzhou ZLG Microelectronics Technology Corp.,Ltd.
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User Manual
CANFDBridge has the ability of acceptance filtering in hardware. Selective reception
of CAN (FD) messages can minimize the network burden from the network. When setting
the acceptance filter, switch to the Filter Settings tab, as shown in Figure 4.19. Select the
CAN channel to be set in [Channel]. Select [Enable Filter] to enable the acceptance filter
function. The filtering mode of CANFDBridge is whitelist filtering. After filtering is enabled,
only CAN (FD) messages within the ID range of each filtering item in the filtering table are
received.
Note: If filtering is enabled, but there is no filtering item in the filtering table, all
packets will be filtered at this time.
The maximum number of filter items for each channel
is 64.
[Filter format] is single ID filter or a group ID filter. Single ID means that only one ID is
set. At this time, only [Start Frame ID] is valid. The group ID means setting [Start Frame ID]
and [End Frame ID] to determine an ID range. At this point, only IDs that meet this range
will be accepted.
Example: As shown in Figure 4.19, the standard frame IDs for CAN0 channel
acceptance are set to 0x08 and 0x12, the extended frame group IDs are 0x55 to 0x66,
and the standard frame group IDs are 0x22 to 0x66. The CAN0 channel of CANFDBridge
only receives standard frame CAN (FD) messages with IDs 0x08, 0x12, 0x22-0x66 and
extended frame CAN (FD) messages with IDs 0x55-0x66.
Figure 4.19 Filter parameter settings
4.3.5 Frame Mapping
CANFDBridge can set the frame mapping function. Figure 4.20 shows the frame
mapping interface. After the specified CAN (FD) frame is received, it is forwarded to the
specified CAN (FD) frame for transmission. The specific functions of frame mapping are
as follows:
Each CAN channel supports 64 frame mappings;
