Implement HAVE_LCD_ENABLE and lcd_update_rect(). When Rockbox runs in the background
this greatly reduces CPU load. lcd_update_rect shoves a bit as well.
CPU usage with Rockbox in background is between 3% (with a 200kbps vbr mp3) and 12% (320kbps cbr mp3), so it's low but still dependent on codecs and even particular files.
Driving a WPS with peakmeter, e.g. the builtin one, adds about 30% cpu usage.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27689 a1c6a512-1295-4272-9138-f99709370657
4 files changed