F28335 only has 32 mailboxes, does that mean it can only receive 32 unique messages?

Maxpower

Other Parts Discussed in Thread: TMS320F28335

Actually 31, since you need at least 1 mailbox for transmit. You can always change the identifier before send but on receive you would have to already program a mailbox for the identifier you want to receive.

What strategies, if any, exist for receiving more than 31 (32) unique messages?

I can think of using a byte in the data as an identifier but...

Thanks

over 14 years ago

0 John Lagerquist over 14 years ago

Intellectual 420 points

Keep in mind that the filter configuration will allow you to receive multiple ID's in the same mailbox.

0 Maxpower over 14 years ago in reply to John Lagerquist

Expert 1105 points

I see that now.

Thanks

0 Jimmy Liu81957 over 13 years ago in reply to Maxpower

Intellectual 310 points

Hi,

I try eCAN bus Mailboxes transmit and Receive on eZdsp TMS320F28335 . I configure eCANa for transmit and eCANb for Receive on F28335 .

Then I use i-7565 to monitor CAN bus , It can get my transmit packet for eCANa . But the eCANb can't get data to MailBox , It halt on ECanbShadow.CANRMP.bit.RMP3 == 0.

I don't known can the F8335 configure eCANa as transmit and eCANb as receive worked together ???

Could you give me some information ???

Regards,

Jimmy

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F28335 only has 32 mailboxes, does that mean it can only receive 32 unique messages?