Method, can bus driver, and can bus system for recovering a clock frequency of a can bus

Method, can bus driver, and can bus system for recovering a clock frequency of a can bus

  • CN 101,647,200 A
  • Filed: 02/05/2008
  • Published: 02/10/2010
  • Est. Priority Date: 03/09/2007
  • Status: Active Application
First Claim
Patent Images

1. be used to utilize main device (2) and at least one to recover the method for the clock frequency (T) of CAN bus (1) from installing (4), wherein this main device has clock generator (3), and this method has following step:

  • A) provide this clock frequency (T) by this clock generator (3);

    B) send at least one frame (R) by this CAN bus (1) with the clock frequency (T) that is provided by this main device (2), described at least one frame includes at least one predetermined bit pattern (B);

    C) receive the frame (R) that is sent by this from device (4);

    D) from the frame (R) that is received, extract described predetermined bit pattern (B);

    E) be equipped with this from device (4) with phase-locked loop (5);

    AndF) utilize extracted, predetermined bit pattern (B) drives this phase-locked loop (5) as the reference signal, with the clock frequency (T) in this recovery CAN bus (1) from device (4).

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