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
receiving the last CAN frame with ID 0x03, the combined CANFD frame is sent
immediately. The first 16 bytes of data are the previously cached data.
Figure 4.31 Example of receiving only the last packet
Figure 4.32 shows the settings. Make CAN0 combine three standard CAN frames
with IDs 0x10, 0x11, 0x12 with a data length of 8 into a CANFD standard frame with an ID
of 0x234 and a data length of 64. The first 24 bytes of data are merged from the data of
three CAN frames, and the last 40 bytes of data are auto-fill bytes 0xFF.
Figure 4.32 Total length of combined CAN less than CANFD
As shown in Figure 4.33, the CANFD frame data sent after the merge is automatically
filled with data 0xFF starting from the 25th byte.
Figure 4.33 Example of combined CAN total length less than CANFD
4.3.9 Split
The split function is used to split the CANFD message into multiple CAN messages
for transmission. The device supports setting a maximum of 64 split rules. Each rule
specifies the frame ID, frame type and frame length of the CANFD to be split. After
receiving the corresponding CANFD message, it is split into multiple CAN messages
based on the preset target frame ID and frame type. The specified split CANFD frame ID
