==================================V1.03=================================
1. Adds new function for configuring CAN baud registers directly when the rotary switch is set to 'A' and the CAN baud is set to 0.
2. Adds new function to allow the firmware update with COM port when the rotary switch is set to 'E'.
3. Fix the bug when the CAN data exchange is in low speed, the CAN Tx Fail detection will affect the normal CAN data transmission.
4. When the CAN Bus OFF is happened, all the messages in the buffer are dropped. After one message is transmitted successfully, the 
   Err LED is reset.
5. When the CAN Tx buffer is overflow, the oldest message will be dropped. 
6. When the CAN Tx buffer is overflow, change the Err LED action from "always flash" to "possible recovery as
   the CAN BUS OFF is happened or the all messages of the CAN Tx buffer has been processed completely".
7. When the CAN Rx buffer is overflow, the newest message will be dropped.
=========================Release Version V1.01==========================