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CAN Message transmission

thirugnanaraman sv
Prodigy 60 points
Other Parts Discussed in Thread: TCAN4550

Hi 

I am working on a automotive project. I need to get the status of the vehicle ignition ON/OFF and key position in the vehicle (OFF/ACC/IGN) thorough CAN. Is this possible through without buying a CAN Stack or OBD stack.

IS there any other IC that support this functionality without the use of a stack. I am looking for a effective and cost efficient solution

  • 0
    TI__Guru 53575 points

    Hi, 

    A CAN software stack typically handles the high-level functions of CAN bus communication such as error handling, mode management, and device layer abstraction. If this high-level management is not needed or if it is being done elsewhere in the system then it would be possible to get such information from the CAN bus simply by configuring and accessing the CAN controller directly. This could be done on any MCU that includes a CAN controller or with an external controller such as the TCAN4550. 

    Let me know if this is what you are looking for or if there are some other requirements for your application. 

    Regards, 
    Eric Schott 

  • 0 in reply to Eric Schott1
    Prodigy 60 points

    Hi,

    I need to know vehicle ON/OFF condition from CAN. By default without any stack whether CAN will transmit any vehicle information to the receiver end, like RPM etc...

  • 0 in reply to thirugnanaraman sv
    TI__Guru 53575 points

    Hi,

    The data that is being presented on the CAN bus is dependant on the high-level system implementation of CAN. In order to get the status of any node in the network, you will need to understand how that system expects for such a request to be given. If the system already broadcasts such information, it would be sufficient to monitor CAN traffic to determine the system state. Because all system implementations are unique, you will need to determine what is available in your specific system before you can go about determining the state of the system. 

    This forum is dedicated to support of the low-level physical and protocol layers of CAN implementation. The engineers here are experts in the hardware needed to implement such a system, however our experience in various high-level system implementation strategies is more limited. I recommend contacting the engineer in charge of the system you are working with to find out how the high-level communication scheme has been implemented. 

    Regards,
    Eric Schott