S12 / MagniV Microcontrollers中的主题 Re: problem dealing with two CANs https://community.nxp.com/t5/S12-MagniV-Microcontrollers/problem-dealing-with-two-CANs/m-p/485615#M12072 <HTML><HEAD></HEAD><BODY><P>Hi carl,</P><P>Could you please specify your MCU derivative? CAN interrupts are managed by CPU or XGATE?</P><P></P><P>Which version of CW you use?</P><P></P><P>Contains your CAN routines any loops which could be potentially infinite?</P><P></P><P>Did you implement CAN Error Interrupt routines?</P><P></P><P>I suppose that CANs have independent external transceivers. Could you please check whether new data correctly arrived to MCU pins?</P><P></P><P>Are you sure that CAN codes do not share any global variable for processing?</P><P></P><P><BR />I hope it helps you.</P><P></P><P>Have a great day,<BR />RadekS</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Wed, 13 Jan 2016 16:54:58 GMT RadekS 2016-01-13T16:54:58Z problem dealing with two CANs https://community.nxp.com/t5/S12-MagniV-Microcontrollers/problem-dealing-with-two-CANs/m-p/485614#M12071 <HTML><HEAD></HEAD><BODY><P>Hi, I am using MC9S12 MCU for a project which requires receiving messages from two separate CANs from a vehicle. The problem I am having is that one of the CAN interrupt will randomly stop receiving message from the CAN bus. when this happens, I have to restart the program again.</P><P>I never have this problem when dealing with receiving from one CAN. I have tried setting one CAN with high priority and another with lower priority but the problem persists. logically, I assume this happens when interrupt from one CAN happens before another CAN has finished processing the message. Is there a way to solve this problem? thanks, </P></BODY></HTML> Tue, 12 Jan 2016 15:09:30 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/problem-dealing-with-two-CANs/m-p/485614#M12071 karlsl 2016-01-12T15:09:30Z Re: problem dealing with two CANs https://community.nxp.com/t5/S12-MagniV-Microcontrollers/problem-dealing-with-two-CANs/m-p/485615#M12072 <HTML><HEAD></HEAD><BODY><P>Hi carl,</P><P>Could you please specify your MCU derivative? CAN interrupts are managed by CPU or XGATE?</P><P></P><P>Which version of CW you use?</P><P></P><P>Contains your CAN routines any loops which could be potentially infinite?</P><P></P><P>Did you implement CAN Error Interrupt routines?</P><P></P><P>I suppose that CANs have independent external transceivers. Could you please check whether new data correctly arrived to MCU pins?</P><P></P><P>Are you sure that CAN codes do not share any global variable for processing?</P><P></P><P><BR />I hope it helps you.</P><P></P><P>Have a great day,<BR />RadekS</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Wed, 13 Jan 2016 16:54:58 GMT https://community.nxp.com/t5/S12-MagniV-Microcontrollers/problem-dealing-with-two-CANs/m-p/485615#M12072 RadekS 2016-01-13T16:54:58Z