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Hopefully fix FS #8840 for iAudio M3, M5 and X5. Reduce greyscale update frequency on M3 in order to reduce CPU load (was >50% before, but this fix would have made it even worse).

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17621 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2008-05-24 08:53:12 +00:00
parent 5e9732367d
commit 4a6190dd13
3 changed files with 134 additions and 85 deletions
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8
apps/plugins/lib/grey_core.c
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@ -81,10 +81,10 @@ static const unsigned char lcdlinear[256] = {
220, 221, 222, 223, 225, 226, 227, 228, 229, 230, 231, 232, 234, 235, 236, 237,
238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 249, 250, 251, 252
};
/* The actual LCD scanrate is twice as high, but we cannot transfer fast enough
* for 150Hz. Even at 75Hz, greyscale display is very smooth. Average from
* 2 iAudio remotes. */
#define LCD_SCANRATE 75 /* Hz */
/* The actual LCD scanrate is 3x as high, but 150 Hz or 75 Hz cause a too high
* CPU load (> 50 %). Even at 50Hz, greyscale display is rather smooth. Average
* from 2 iAudio remotes. */
#define LCD_SCANRATE 50 /* Hz */
#elif defined IAUDIO_M5 /* verified */
/* Measurement of one iAudio M5L */