2011/4/28 Heinz-Jürgen Oertel <[email protected]> > Am Donnerstag, 28. April 2011, 10:38:40 schrieb Willy Lambert: > > > > > > > Hi, > > > > I change my 2 board to put the working alpha in the pc-box and the > non-working beta out ... guess what ... alpha is no more working, and beta > works... > > The good news is that my software is good in some situations. The bad one > is that I unconnected all the stuff that could make a difference > > > > The only difference in dmesg and interrupts where due to the PS2 keyboard > that I have now connected. > > > > The last difference may be due to power supply (or electro-mag > environnment ? just a close fan and wifi board ), but I overpowered it a > bit... > > > really a mystery. > I don't believe that your power supply or the wifi will produce enough smog > to influence CAN. > CAN communication is very reliable, one of the reasons to be used in cars. > In case of many communication errors, the CAN controller generates an error > interrupt. > Which is not the case in your system. > > After some (!) mecanical and electrical manipulations and tests, I finally discover what's the problem : The bottom of my PC104 CAN board where in contact of the top of my cpu who has a heatspreader :( Don't ask me why it was always in contact on my non-working board and never in contact on my working one... Murphy's behing all this !
I found this when touching my powered CAN board in the PC-Box. It un-contacts something and suddenly send all the required messages on CAN which made my motors running. Thanks for taking care of my request, It was finally only hardware stuff, but your answers helped me searching in the right direction. > Heinz >
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