how to make CAN BUS waked up with one wake up pattern transmission

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how to make CAN BUS waked up with one wake up pattern transmission

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byungju_jin
Contributor I

Hello Dear

I am using TJA1145 for my project and partial networking.

my problem is that I do not understand exact wake procedure from BUS off status to Bus active.

In my case, I need to send 2 consecutive wake up code to wake up the CAN BUS.

below is wake up sequence.

1. CAN BUS oFF status 

      --> my ECU send Wake up pattern via CAN bus  

2. CAN BUS level goes to 2.5V

       --> My ECU  send same wake up pattern as before.

3. CAN wake up.

4. CAN BUS goes to normal status.

I would like to know how I make CAN BUS waked up with only one time  wake up signal transmission on the CAN.

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TomasVaverka
NXP TechSupport
NXP TechSupport

Hi,

Could you please be more specific about the test you are performing? Duration of sleep-wakeup cycle, sleep request steps, what kind of wakeup is configured, wakeup message specification, etc.

Best regards,

Tomas

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