Wolfgang Denk wrote: > In message <[EMAIL PROTECTED]> Andreas B. wrote: >> If the clocks are syncronized very well (this is the point I need >> IEEE1588 for) I > > Even with IEEE1588 you will not reach arbitrarily high precision if > you have to do the timestamping of the received PTP packets in > software only. I'm not aware of many ethernet controllers that are > capable of detecting and timestamping PTP packets in hardware - > actually the only one I know of is the one in the PPC405EZ.
Hilscher's netX is another one. Still the problem remains how to make use of the gained accuracy. You may need further hardware help (e.g. some FPGA) or do ahead-of-time wakeup + spinning until the actual event in software (costs CPU cycles). Jan
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