[En-Nut-Discussion] SJA1000 driver

[Uwe Bonnes]

>>>>> "Ole" == Ole Reinhardt <ole.reinhardt at embedded-it.de> writes:

    Ole> Hi Petri,
    >> I was afraid that there was something I was not seeing.  I am already
    >> using MCP2515 and it has been serving our project well but now we
    >> have to receive bursts of CAN messages and we miss some of them. I'm
    >> guessing that the SPI bus may be overloaded because there is a lot of
    >> other traffic on it, too. That's why I was hoping to test SJA1000
    >> with (hopefully) little effort to see if removing CAN traffic from
    >> the SPI helps. Now other possible solutions I have is to increase SPI
    >> speed by doing the SPI in the NPL or use a slave MCU to buffer the
    >> bursts. Probably AT90CAN128. I guess I will go with the slave MCU.

    Ole> Are you using the original Ethernut3? If not, using the SAM7x might
    Ole> be a solution for you (which has an included can controller)

Otherwise, there are FPGA Cores for the SJA1000, so if you hav an FPGA with
some bus access and some free place, the SJA1000 comes for free.

-- 
Uwe Bonnes                bon at elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------