SPRUHM9H October 2014 – May 2024 TMS320F28075 , TMS320F28075-Q1 , TMS320F28076
If the number of implemented message objects is not sufficient to be used as permanent message objects only, the transmit objects can be managed dynamically. The CPU can write the whole message (arbitration, control, and data) into the Interface register. The bits [23:16] of the Command register can be set to 0xB7 for the transfer of the whole message object content into the message object. Neither MsgVal nor TxRqst need to be reset before this operation.
If a previously requested transmission of this message object is not completed but already in progress, the transmission is continued; however, the transmission is not repeated if the transmission is disturbed.
To update only the data bytes of a message being transmitted, set bits [23:16] of the Command register to 0x87.