On Mon, Sep 21, 2015 at 11:08:55AM +0200, Jean-Michel Hautbois wrote: > 2015-09-19 19:56 GMT+02:00 Mark Brown <broonie@xxxxxxxxxx>: > > A calculated timeout is probably best. > Well, it depends... > If you have a 20MHz clock, then you can transfer a byte in 4µs. > As most of the time pio_transfer is used for 8 to 32 bytes max, it > would be irrelevant to use such a small timeout. > I can obviously do it, but not sure if using a small (say, 100ms) > timeout would not be better. You want a minimum threashold, yes, but you also need to be able toc ope with larger transfers too so need to be able to raise that where appropriate.
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