Hello, I am pretty new to CAN / linux kernel and I have been working with a custom board with the mcp2515. I managed to get it up and running with the help of this and the socket-core mailing list. The boards use the TI OMAP-L138 and using the davinci spi driver found here: http://arago-project.org/git/people/?p=sneha/linux-davinci-staging.git;a=shortlog;h=refs/heads/davinci-spi-rewrite
The patch seems to fix another issue I was having with missing frames (mcp2515 auto clears rx0, rx1 flags after its read): http://www.mail-archive.com/[email protected]/msg01747.html The CAN interface is brought up by "ip link set can0 up txqueuelen 1000 type can bitrate 1000000" One board collects incoming can frames with "candump -l can0" and another board sends data using "cangen -vv -g 0 -I 255 -L 8 -D i can0". Snippet from candump: (1273660526.261745) can0 255#6B00000000000000 (1273660526.262940) can0 255#6C00000000000000 (1273660526.264550) can0 255#6D00000000000000 (1273660526.266156) can0 255#6E00000000000000 (1273660526.267738) can0 255#6F00000000000000 (1273660526.268450) can0 255#6F00000000000000 (1273660526.269255) can0 004#0001000000000000 <-- (1273660526.270810) can0 255#7100000000000000 (1273660526.272564) can0 255#7200000000000000 (1273660526.274213) can0 255#7300000000000000 (1273660526.275806) can0 255#7400000000000000 (1273660526.277356) can0 255#7500000000000000 (1273660526.278987) can0 255#7600000000000000 (1273660526.280579) can0 255#7700000000000000 ... (1273660526.679990) can0 255#D600000000000000 (1273660526.681331) can0 255#D700000000000000 (1273660526.682890) can0 255#D800000000000000 (1273660526.684471) can0 255#D900000000000000 (1273660526.686086) can0 255#DA00000000000000 (1273660526.687702) can0 255#DB00000000000000 (1273660526.688442) can0 255#DB00000000000000 (1273660526.689668) can0 000#0000000000000000 <-- (1273660526.690836) can0 255#DD00000000000000 (1273660526.692557) can0 255#DE00000000000000 (1273660526.694161) can0 255#DF00000000000000 (1273660526.695781) can0 255#E000000000000000 (1273660526.697432) can0 255#E100000000000000 (1273660526.699022) can0 255#E200000000000000 (1273660526.700622) can0 255#E300000000000000 (1273660526.702224) can0 255#E400000000000000 Not sure where this could be coming from any guidance on how to debug this would be grateful. Thank You Jargalan Nermunkh
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