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(Rx0) should change from time to time right? How could I send messages to the can bus? Everybody, please help me.
BTW, is your CAN bus (output of tranciever)connected to anything? I'm thinking that if it is not, you wont't see anything on your RX pin (nothing to see). I've been unemployed for the past 13 weeks (though I think thats about to change) and have been allowing cobwebs to form on my brain I'm afraid. I'm in the process of reviewing my CAN stuff as my possible new job will be dealing with it extensively. Can you give a descition of your physical layer? Andy
Andy Actually, for the Can Controller, we have two of them, both of which are connected to the CAN bus. We also have a "FPGA" as a router and a usb as a connecter with the pc. we can discuss it in detail via Email. My life in the lab is so tough. have a nice day. Vince