TMS320F2800137: CAN message object

yuhua chao

Prodigy 50 points

Part Number: TMS320F2800137
Other Parts Discussed in Thread: C2000WARE

In CAN example, we can use function "CAN_setupMessageObject()" to set objects.

But it only have 32 message to use for CAN communication, it's not enough for our project to use .

Q1: Is there have any method when CAN message over 32 message to receive?

Q2: If CAN ID is "18FF6613" and "18FF6614". Can I use the same message object to receive when byte 2 to 4 is "FF66" ?

over 2 years ago

0 Sahil Deshpande over 2 years ago

TI__Expert 6035 points

Acceptance filtering can be employed to use a single receive message object to receive multiple Message IDs.

Please refer to the device TRM chapter for more details on acceptance filtering. You can refer to the example "can_ex8_mask" in C2000ware as a demo on how to implement filtering.

Thanks.

0 yuhua chao over 2 years ago in reply to Sahil Deshpande

Prodigy 50 points

Thanks Sahil.

I'm success to mask and receive multiple message IDs.

Another question,

I try to set mask in transmit message, but it didn't change in the message ID.

What is the use of mask in CAN transmit message?

0 Sahil Deshpande over 2 years ago in reply to yuhua chao

TI__Expert 6035 points

Masking is only for Acceptance Filtering of Received Messages. Transmitted Messages CANNOT be masked, and each transmitted messages will have a single Message ID.

Thanks.

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TMS320F2800137: CAN message object