DK-TM4C123G: Set up CAN demo on DK-TM4C123G

As good as your post & photos are - apparently (only) "renegade outsiders" lurk this space - this day. You never (directly) describe the problem.

Indirectly via a "Texas sized/color appropriate" arrow it (appears) that your display has not presented the CAN Data. Your use of (only the display - if that proves the case - to verify data arrival & correctness) is a clear (and major) violation of KISS! You've imposed "multiple hoops" for your CAN Data to navigate - that may not be wise.

Would not review of the appropriate CAN based MCU Registers - prove more direct - and less dependent upon, "EVERYTHING ELSE PERFORMING TO PERFECTION?" KISS (appears) banned here - that's especially poetic - in your case...

Hello Edward

The setup looks correct. I am not sure what the question is here?

I send character 'a' to another board, as you can see, there is nothing shows up behind RX Data. I can measure CAN signal on the wire so I guess something wrong with the receiver side. Have ever you set up this demo?

Hello Edward

Do you have a common GND between the two boards?

Which TivaWare version are you using?

Yes, I have tried to connect both grounds.
Tivaware v2.1.3.156

Hello Edward

There is a known issue with can.c file in the driverlib in TivaWare 2.1.3.156. Can you check if the data bus shows continuous traffic when you press a key?

The second thing I remember is that i have used only a single 120 ohms termination resistor.

Yes, please see the screenshot by logic analyzer. The CAN TX board will keep sending data to CAN RX board. How to fix this problem?
I can remove one 120ohm resistor and test the code again.