I want to send a message using Can Controller T89C51CC01 right now, I am not sure when the message is sent. Right after CANCONCH is set? Using the debug program in Keil, I could clearly see the message is on the can channel I assigned to. But the value of pin P4.0 and P4.1 don't change at all. If the can controller is sending messages, P4.0(Tx) P4.1(Rx) should change from time to time right? How could I achieve this Everybody, please help me.