Merged revisions 4003-4037 via svnmerge from

https://src.develer.com/svnoss/bertos/trunk

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  r4010 | batt | 2010-07-08 17:42:42 +0200 (gio, 08 lug 2010) | 1 line

  Simplify driver in order to use less memory. The FIFO implementation had also a bug in write mode.
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  r4012 | batt | 2010-07-08 18:29:42 +0200 (gio, 08 lug 2010) | 2 lines

  Reformat;Increase NAC timeout; Fix warning; Add simple write test.
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  r4014 | batt | 2010-07-08 18:32:34 +0200 (gio, 08 lug 2010) | 1 line

  Silence warning during night test.
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  r4015 | batt | 2010-07-08 18:59:42 +0200 (gio, 08 lug 2010) | 1 line

  Increase read/write performances; add some comments.
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  r4016 | batt | 2010-07-08 19:19:43 +0200 (gio, 08 lug 2010) | 1 line

  Improve docs.
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  r4017 | batt | 2010-07-09 12:43:19 +0200 (ven, 09 lug 2010) | 10 lines

  Flush the transfer before exiting from write function.

  Since the buffer is used by the DMA, if we return early we run the
  risk of having the buffer overwritten before the transfer will be
  completed.
  Waiting for the flush could be theorically a pessimization, but from
  tests, since the typical use involves mixed reads/writes, we already
  wait for the transfers to be completed, and performance are
  almost the same.
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  r4018 | batt | 2010-07-09 12:43:34 +0200 (ven, 09 lug 2010) | 1 line

  Remove unneeded configuration.
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  r4019 | batt | 2010-07-09 12:47:03 +0200 (ven, 09 lug 2010) | 1 line

  Silence warning.
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  r4020 | batt | 2010-07-09 18:39:21 +0200 (ven, 09 lug 2010) | 1 line

  Add some documentation.
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  r4021 | batt | 2010-07-09 18:43:14 +0200 (ven, 09 lug 2010) | 1 line

  Reformat; Optimize flush.
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git-svn-id: https://src.develer.com/svnoss/bertos/branches/i2c@4038 38d2e660-2303-0410-9eaa-f027e97ec537