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CAN Communication problem(S12ZVM)

Question asked by max xu on Sep 11, 2019
Latest reply on Sep 11, 2019 by max xu


   Hello everyone,I use S12ZVML32 for can communication,


   The settings are as follows: 


    CAN0IDAC_IDAM = 0; /* Two 32 bit filters */


    CAN0IDAR0 = 0x64;  //ID 0X322
    CAN0IDAR1 = 0x40;

   CAN0IDMR0 = 0x00; /* Accept all incoming ID's */
   CAN0IDMR1 = 0x07;
   CAN0IDMR2 = 0xFF;
   CAN0IDMR3 = 0xFF;
   CAN0IDMR4 = 0x00;
   CAN0IDMR5 = 0x07;
   CAN0IDMR6 = 0xFF;
   CAN0IDMR7 = 0xFF;


   (1)   I can receive not only the data with ID = 0x322, but also the data with ID = 0X000. According to the settings, only ID = 0X322 can match, and whether ID = 0X000 is unconditional?

   (2)  Why?Both  first 32-bit filter bank (CANIDAR0–CANIDAR3, CANIDMR0–CANIDMR3)  and

                         the second filter bank (CANIDAR4–CANIDAR7, CANIDMR4–CANIDMR7)  must be set