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ngaylard
ngaylard
Associate III
January 12, 2010
Question

CAN Filter Masks

  • January 12, 2010
  • 1 reply
  • 633 views
Posted on January 12, 2010 at 12:43

CAN Filter Masks

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    1 reply

    ngaylard
    ngaylardAuthor
    Associate III
    May 17, 2011
    Posted on May 17, 2011 at 13:37

    Hello All,

    I would really appreciate some help. I am working with the STM32 and using CANBUS to implement a J1939 receiver. The problem I have is that I need to use MASK mode.

    Firstly the CAN documentation on the STM32 sucks! It is incomprehensible when it comes to filters, especially in MASKED mode, which makes me wonder if ST have bothered to do much with this.

    I have successfully had the system working in List Filtering mode and I can get Masked mode to work IF I only enable a single Mask/Id combination.

    When multiple mask/id filters are enabled (with the different values) then unwanted messages are caught as the message ''falls through'' and it caught - normally by Filter Mailbox 3 or 4!

    Many thanks and all help appreciated.

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