ICP DAS USA CAN-Logger Series, Руководство пользователя, Страница: 43 / 45

CAN-Logger series CAN Bus data logger devices User Manual (version 1.0.1) Page: 43
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7. Appendix
7.1. CAN Status Register
Bit Symbol Value Description
Last error code
Type of the last error to occur on the CAN bus.The LEC field holds
a code which indicates the type of the last error to occur on the CAN
bus.
0x0 No error.
0x1 Stuff error : More than 5 equal bits in a sequence have occurred in
a part of a received message where this is not allowed.
0x2 Form error : A fixed format part of a received frame has the wrong
format.
0x3 AckError : The message this CAN core transmitted was not
acknowledged.
0x4 Bit1Error : During the transmission of a message (with the
exception of the arbitration field), the device wanted to send a
HIGH/recessive level (bit of logical value ‘1’), but the monitored bus
value was LOW/dominant.
0x5 Bit0Error : During the transmission of a message (or acknowledge
bit, or active error flag, or overload flag), the device wanted to send
a LOW/dominant level (data or identifier bit logical value ‘0’), but the
monitored Bus value was HIGH/recessive.
0x6 CRCError : The CRC checksum was incorrect in the message
received.
2:0 LEC
0x7 Unused : No CAN bus event was detected
Transmitted a message successfully.
0 No message has been successfully transmitted.
3 TXOK
1 A message has been successfully transmitted.
Received a message successfully
0 No message has been successfully received
4 RXOK
1 A message has been successfully received independent of the
result of acceptance filtering.
Error passive
0 The CAN controller is in the error active state.
5 EPASS
1 The CAN controller is in the error passive state as defined in the
CAN 2.0 specification.
Warning status
0 Both error counters are below the error warning limit of 96.
6 EWARN
1 At least one of the error counters in the Error Counter Register has
reached the error warning limit of 96.
Busoff status
0 The CAN module is not in busoff state.
7 BOFF
1 The CAN controller is in busoff state.
31:8 - - Reserved