See several days freescale AN4285 routines, the club's official website jump in Bootloader program between the APP and now still is not very understanding, which predecessors have to write a simple tutorial and routines (I use is 12 xeq512 chip),

1, create a Bootloader program, modify the PRM file, performs the LED lights in the main program and then jump to APP.
2, create an APP, modify the PRM file, in the main program that executes the LED flashing, when receiving a CAN frame and then jump back to the Bootloader program.

Can I download your tutorial with integral and routines, thank you.