Hello I have a CAN-Modul with an 8 Bit CAN controller from Infineon (SAF-C515C-8EM). The Busload is about 30%. Sometimes the controller has problems to set the Stuffbit on the right possition. For example: He sends 6 recessive Bits and than a dominant Bit. But after 5 equal Bits must follow an other Bit. I want to know if some one has known this problem? Thanks Alexander

Problem with Bit stuffing
Started by ●May 3, 2007
Reply by ●May 3, 20072007-05-03
Alexander wrote:> I have a CAN-Modul with an 8 Bit CAN controller from Infineon > (SAF-C515C-8EM). > The Busload is about 30%. > Sometimes the controller has problems to set the Stuffbit on the right > possition. > For example: > He sends 6 recessive Bits and than a dominant Bit. > But after 5 equal Bits must follow an other Bit.I consider such a fault extremely unlikely to have been caused by the CAN node. Things like that don't go unnoticed. A mismatch of clock frequencies or bit timings between the C515 and whichever other device you used to count those bits is considerably more likely than an utter failure of a CAN controller to adhere to the CAN spec. As would be some kind of out-of-specs operation of the thing (too fast, constraint violation in CAN timing configuration, wrong voltage, whatever, ...)
