In DAR mode, all transmissions are automatically cancelled after they start on the CAN bus. A Tx Buffer’s Tx Request Pending bit TXBRP.TRPx is reset after successful transmission, when a transmission has not yet been started at the point of cancellation, has been aborted due to lost arbitration, or when an error occurred during frame transmission.
Corresponding Tx Buffer Transmission Occurred bit MCAN_TXBTO.TOx set
Corresponding Tx Buffer Cancellation Finished bit MCAN_TXBCF.CFx not set
Corresponding Tx Buffer Transmission Occurred bit MCAN_TXBTO.TOx set
Corresponding Tx Buffer Cancellation Finished bit MCAN_TXBCF.CFx set
Corresponding Tx Buffer Transmission Occurred bit MCAN_TXBTO.TOx not set
Corresponding Tx Buffer Cancellation Finished bit MCAN_TXBCF.CFx set
In case of a successful frame transmission, and if storage of Tx events is enabled, a Tx Event FIFO element is written with Event Type ET = “10” (transmission in spite of cancellation).