CAN is not working in normal mode.

[Alihussain Vohra]

In loopback mode data is shown on RX pin, but when I do normal mode nothing is shown on TX and RX as well as CAN HIGH and LOW.I am attaching my main file, can you tell me my mistake.

I am using stm32f072rbt6 discovery board.I am using TJA1050 can transciever.I am using internal 48 MHZ clock and 48 MHZ as APB.