CAN bus testing for PE-HMI1

Hi all.

I am testing CAN but my code receives callback messages as below.

(CAN_EVENT_ERR_BUS_OFF, CAN_EVENT_ERR_PASSIVE, CAN_EVENT_BUS_RECOVERY)

What is the exact meaning of above messages?

Also, I would like to know whether there is any working source code for PE-HMI1 board or not.

(My SSP version is v1.3.3 and IDE is IAR EWB for Synergy)

Thanks in advance.

- K -