2008-08-06 08:07:08     Startup of CAN bus driver

Document created by Aaronwu Employee on Aug 7, 2013
Version 1Show Document
  • View in full screen mode

2008-08-06 08:07:08     Startup of CAN bus driver

Miquel Soler i Mir (SPAIN)

Message: 60033   

 

Hello.

 

I had a problem when I start the can driver. I'm using CM-BF537E from bluetechnix and 2008R1-RC8.

 

To test the CAN I'm using a sniffer (PCAN) from Peak systems and datalogger from 2D-datarecording. The PCAN show me in the computer all the CAN messages and the 2D logger send me CAN data. All these devices are tested and working 100 % fine.

 

To test the can bus I'm using the added program

 

The driver works in some case and not work in other cases.

 

1.- CASE #1:

 

        Start the board.

 

        Load the driver by modprobe

 

        ./can (start the program)

 

        connect the 2D logger

 

It's working fine

 

 

 

2.- CASE #2:

 

       Start the board and 2D logger

 

       Load the driver

 

       Start the program

 

I'ts not working, nothing received

 

 

 

3.- CASE #3:

 

      Start the board and 2D logger and PCAN

 

      Load the driver

 

      Start the program

 

It's working fine.

 

 

 

4.- CASE #4:

 

       Start the board and 2D logger

 

       Load the driver

 

       Connect the PCAN sniffer

 

       Start the program

 

It's working fine.

 

 

 

The problem is when I configure the can driver and there are some CAN nodes sending information without any other device ACK this information.

 

Can somebody help me with this.

 

Thanks.

 

 

 

Miquel Soler i Mir

 

 

 

 

 

 

 

cantr.c

TranslateQuoteReplyEditDelete

 

 

2008-08-06 12:46:28     Re: Startup of CAN bus driver

Robin Getz (UNITED STATES)

Message: 60049   

 

Miguel:

 

There are some CAN issues which require a something "good" to be on the bus, otherwise you never receive an ACK, your message retransmits n times, and your controller thinks it is broken - and turns itself off.

 

I'll need to poke into things to see how this is handled in the Blackfin driver.

 

-Robin

Attachments

Outcomes