CAN transmitter problem in LPC2129

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shwethask

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I'm doing a project on CAN communication in LPC2129. i got some sample codes from online nad i tried to port it in my controller. problem i face is that, my controller is not transmitting any message. when i debug my code in KEIL IDE, status bit (CANGSR, CANSR) shows that my controller is transmitting from the buffer I have selected. When I look at my oscilloscope, I see no data being transmitted. So my code never reaches receiver part.
Can someone tell me where would i be making mistake?? Does anyone of you have working CAN samle code of LPC2129/ LPC21XX??

thankyou.
 

CAN help in LPC2129!!

I'm a final year student doing thesis work. I have CAN communication in my work. I tried few sample codes and my own code in my controller, but neither one of them transmit message. I have two controllers where one acts as transmitter and other as receiver. I tried connecting oscilloscope to TX pin to see CAN message, but all I see is CAN bus idle state. When i debugged my code in KEIL IDE, the status registers (cangsr/cansr) shows my controller is transmitting message from the TX buffer I have chosen and my code gets stuck there. It doesnt goto RX side. Rx buffer is empty.
Could someone tell me where would I be going wrong? Can I get a working sample code for CAN?

Forgot to mention, I use LPC2129 board!!


thank you in advance!!
 

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