Hello,
we are loosing frames on our embedded target and currently we are searching for
the cause.
Our current setup is:
- TQM5200 (a board made by TQ with an MPC5200B) on our own carrier-board
- Kernel 2.6.35.7 from kernel.org (we initial used 2.6.27.18 from denx and had
the same problems)
- activated mscan in kernel-config
- 2x CAN-sources connected to the 2 can interfaces of the board:
- first source (connected to can0):
- creates an message containing a counter every 5ms
- creates another message containing another counter every 2ms
- second source (connected to can1):
- creates 3 messages every 20ms containing some payload
- both can interfaces are configured with 1Mbit/s
Now we have two cases, one with missing frames and one without:
Case 1:
- candump -l -s2 can0 -> logging in an file which is stored in RAM
- we get all messages in the logfile
Case 2:
- candump -l -s2 can0 -> logging in an file which is stored on an
CompactFlash-card
- the CF-card is connected via the IDE-interface without DMA (we don't get DMA
working with the CF-card, unfortunately it only works with harddrives)
- we are loosing messages:
- every 35s we are missing messages in blocks, never we are missing 1
message, always 5-6 at once
Anyone had similar problems? Any hints?
Thanks,
René
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