No subject


Sat Nov 8 12:54:08 CET 2008


http://people.openmoko.org/werner/wlan-spi/spi-int.png

For each burst of data (one byte), we have a silent period of about
six times that duration. (The screenshot says 2.26us, but there was
a bug in the program at that time that may have made it use the wrong
factor, so this may in reality be 4.52us or 5.65us. But in any case,
the burst-pause ratio is correct.)

And I'm afraid this is not just time spent doing nothing, but actual
interrupt handling and transfer setup overhead.

- Werner



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