TMS320F28069: 3.3V onboard CAN bus between uC

Hi,

Looks like the image you have tried to attach hasn't come through. While a subject matter expert will respond to your query, there are instructions for inserting images here that can help. Kindly reattach the picture you wanted to share. 

https://e2e.ti.com/support/tools/ccs/f/81/t/821597.

 Thanks & Regards

Pramod

Hareesh,

Thanks for your answer.

Just to clarify the CAN architecture I would like to have. The board is connected to an external CAN bus, each uC has it own address and no communication between micro is needed. Message came from another board and is dedicated to a specific uC, This uC retruns information.
The point is I am more than limited in space and having one transceiver for the internal bus seems the best solution.

Could you give me your point on the architecture and best solution?

Regards

Louis

The issue is not so much S/W. It is how you avoid contention between the 4 MCUs. 

Kindly provide the complete wiring diagram for the 4 nodes on the MCU side. 

Also, our I/Os are 3.3v, not 5v. You may need some level translation.

Hareesh,

Thanks for your answer. You can find below the can transceiver schematic I use.

Regards,

Louis

No, I need the wiring diagram for the 4 MCUs.

Hareesh,

Thanks again.  This is the CAN Tranceiver to micros paths.

On the left picture, you can find the output lines of the tranceiver connected to the 4 microcontrollers.

On the mid picture, you have the microcontroller cline connection (direct connection)

On the right picture a shematic of the connection similar to what is designed in Altium.

Regards

Louis
tranceiver connection.

Regards,

Louis

You cannot short four output pins like this. Please refer to the post I referred to in my first response.