Mix Motorola and Intel Byteorder on CAN bus

MikeP

Hello community,

I have a question about the byte-order setting for the CAN-peripheral on a F28335 controller.

It is possible to set the byte-order in the CANMC.DB0 register, but this setting affects the whole peripheral. I have now the case, that I want to mix Intel and Motorola byte-order on the same CAN bus, how can this be done when this setting is global?

The CAN peripheral user manual did not solve my problem so far.

Thank you for helping me there,

Michael

over 10 years ago

0 Adam Haun over 10 years ago

TI__Expert 8950 points

Michael,

You'll have to handle that in software. The eCAN hardware doesn't have any feature to help you use different byte orders in different mailboxes.

0 MikeP over 10 years ago in reply to Adam Haun

Prodigy 70 points

Hello,

So what is the purpose of this DB0 bit?

But in general I would prefer to do it in my code, and fill my mailboxes according to my byteorder configuration for each message. If this is possible to do so, independent of the configuration of this DB0 register I am very happy.

0 Adam Haun over 10 years ago in reply to MikeP

TI__Expert 8950 points

Well, the purpose is just what you said -- DB0 lets you change the byte order for the whole peripheral. If you want to use a different order for each mailbox, you need to swap the bytes in software.

C2000™︎ microcontrollers

C2000 microcontrollers forum

Mix Motorola and Intel Byteorder on CAN bus