RXOK=NO_RECEIVE, BOFF=THE_CAN_MODULE_IS_NO, TXOK=NO_TRANSMIT, LEC=NO_ERROR, EWARN=BELOW_LIMIT, EPASS=ACTIVE
Status register
| LEC | 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. This field will be cleared to 0 when a message has been transferred (reception or transmission) without error. The unused code 111 may be written by the CPU to check for updates. 0 (NO_ERROR): No error. 1 (STUFF_ERROR_MORE_TH): Stuff error: More than 5 equal bits in a sequence have occurred in a part of a received message where this is not allowed. 2 (FORM_ERROR_A_FIXED): Form error: A fixed format part of a received frame has the wrong format. 3 (ACKERROR_THE_MESSAG): AckError: The message this CAN core transmitted was not acknowledged. 4 (BIT1ERROR_DURING_TH): 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. 5 (BIT0ERROR_DURING_TH): 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. During busoff recovery this status is set each time a sequence of 11 HIGH/recessive bits has been monitored. This enables the CPU to monitor the proceeding of the busoff recovery sequence (indicating the bus is not stuck at LOW/dominant or continuously disturbed). 6 (CRCERROR_THE_CRC_CH): CRCError: The CRC checksum was incorrect in the message received. 7 (UNUSED_NO_CAN_BUS_E): Unused: No CAN bus event was detected (written by the CPU). |
| TXOK | Transmitted a message successfully This bit must be reset by the CPU. It is never reset by the CAN controller. 0 (NO_TRANSMIT): No transmit. Since this bit was last reset by the CPU, no message has been successfully transmitted. 1 (SUCCESSFUL_TRANSMIT): Successful transmit. Since this bit was last reset by the CPU, a message has been successfully transmitted (error free and acknowledged by at least one other node). |
| RXOK | Received a message successfully This bit must be reset by the CPU. It is never reset by the CAN controller. 0 (NO_RECEIVE): No receive. Since this bit was last reset by the CPU, no message has been successfully received. 1 (SUCCESSFUL_RECEIVE): Successful receive.Since this bit was last set to zero by the CPU, a message has been successfully received independent of the result of acceptance filtering. |
| EPASS | Error passive 0 (ACTIVE): Active. The CAN controller is in the error active state. 1 (PASSIVE): Passive. The CAN controller is in the error passive state as defined in the CAN 2.0 specification. |
| EWARN | Warning status 0 (BELOW_LIMIT): Below limit. Both error counters are below the error warning limit of 96. 1 (AT_LIMIT): At limit. At least one of the error counters in the EC has reached the error warning limit of 96. |
| BOFF | Busoff status 0 (THE_CAN_MODULE_IS_NO): The CAN module is not in busoff. 1 (THE_CAN_CONTROLLER_I): The CAN controller is in busoff state. |
| RESERVED | reserved |