Hi Spirilis
Have you looked at the CAN example code by TI dk-tm4c123g Firmware package? What do you think of their code vs yours?
http://processors.wiki.ti.com/index.php/CLP_CAN
http://www.ti.com/tool/sw-dk-tm4c123g
"the DK-TM4C123G software package contains CAN example programs that can be easily ported to all three LaunchPads that support CAN."
Any updates to your project? I am going to implement the same thing
Cheers,
Stephen