Ebyte E810-DTU User Manual
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Chengdu Ebyte Electronic Technology Co.,Ltd E810-DTU(CAN-ETH) User ManualCopyright ©2012–2019, Chengdu Ebyte Electronic Technology Co.,Ltd 24CAN frame(rate less than 5Kbps). With error detection, error notification, and error recovery. Failure closure function. Multiple Connection Nodes.4.2.2. Data protocolWhen the E810-DTU (CAN-ETH) network sends data to the CAN, the data must conform to the data protocolbefore it can be sent out from the CAN bus. Similarly, when the CAN end of E810-DTU (CAN-ETH) receives the datafrom the CAN bus, it will process the data into data conforming to the data protocol, and then send it to the network end.One Ethernet data can contain several CAN bus data that conform to data protocol.The E810-DTU (CAN-ETH) data protocol conversion format is as follows, each CAN frame contains up to 13 bytes,and the 13-byte content includes CAN frame information + frame ID + frame data....... …Frame information: 1 byte in length, used to identify some information of the CAN frame, such as type,length, etc.BIT7 BIT0FF RTR Reserved Reserved D3 D2 D1 D0FF: The identification bits of standard frame and extended frame, 1 for extended frame and 0 for standard frame.RTR: Identification bit of remote frame and data frame, 1 for remote frame and 0 for data frame.Reserved: The reserved value is 0 and cannot be written to 1.D3～D0: Data Length Bit, which identifies the data length of the CAN frame.Frame ID：4 bytes in length, 11 bits in standard frame and 29 bits in extended frame.High byte Low byte High byte Low byteThe above is the extended frame ID number. The above is the standard frame ID numberRepresentation of 0x12345678 Representation of 0x123CAN frame CAN frame CAN frame CAN frame12h 34h 56h 78h 00h 00h 01h 23h |
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