ICP DAS USA mPAC-7186EXD-CAN User Manual page 32

 DataLen: The pure data length of a CAN messages. The range of
this value is 0~8.
 *Data: Store the data of CAN message. The numbers of data bytes
need to match with the "DataLen".

Return:
CAN_NoError: OK
CAN_DataLengthError: Data length of CAN message is over 8.
CAN_TransmitBufferLocked: Transmit buffer of CAN controller is locked.
CAN_TransmitIncomplete: CAN controller can't send the message

Relative function:
3.1.2 XC100Init / XC100Init_Listen
I-7188XBD-CAN/μPAC-7186EXD-CAN user manual (ver.1.0.3, May/09/2014)
successfully.
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