Ebyte ECAN-401, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co.,Ltd.
ECAN-401 User Manual
Copyright ©2012–2022
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Chengdu Ebyte Electronic Technology Co.,Ltd.
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on
1Byte 4Byte 8Byte
The frame information is shown in Table 1.1
The length of the frame ID is 4 bytes, the standard frame valid bit is 11 bits, and the extended frame valid bit is 29 bits.
Extended frame ID number
0x12345678 Standard frame ID number
0x3FF
0x12 0x34 0x56 0x78 0x00 0x00 0x03 0xFF
1. Convert serial frame to CAN message
In the process of converting a serial frame to a CAN message, in a serial data frame aligned with a fixed byte (13 bytes),
if the data format of a certain fixed byte is not standard, the fixed byte length will not be converted. Then convert the
following data. If you find that some CAN messages are missing after conversion, please check whether the fixed byte
length serial data format of the corresponding message does not conform to the standard format.
2. Convert serial frame to CAN message
When the frame data is converted in CAN format, the length is fixed to 8 bytes. The effective length is determined by the
value of DLC3~DLC0. When the effective data is less than the fixed length, it needs to be filled with 0 to the fixed
length.
In this mode, it is necessary to pay attention to the serial data format in strict accordance with the fixed byte format to
successfully convert. The CAN mode conversion can refer to the example (CAN format conversion standard frame
example). When converting, first ensure that the frame information is correct and the data length indicates No errors,
otherwise no conversion will be performed.
Conversion example:
Serial frame to CAN message (protocol mode).
CAN configuration parameters configured in this example. Conversion mode: protocol mode, frame type: extended
frame, conversion direction: two-way. Frame ID: No need to configure, the data before and after conversion is as follows.
Serial frame CAN Message
88
Frame
information
88
17
Frame ID
17
65 65
43 43
21 21
99
Data field
99
88 88
77 77
66 66
55 55
44 44
33 33
22 22
Serial frame to CAN message (protocol mode)