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Samsung YP-S3: update backlight brightness curve again (can't go all the way down to 1/256 brightness) and update yp-s3 bootloader demo.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22117 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Bertrik Sikken 2009-08-02 16:43:58 +00:00
parent 322fae4299
commit ee0ab03286
2 changed files with 53 additions and 35 deletions
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6
firmware/target/arm/s5l8700/yps3/backlight-yps3.c
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@ -37,9 +37,9 @@
void _backlight_set_brightness(int brightness)
{
/* pwm = round(sqrt(2)**x), where brightness level x = 1..16 */
/* pwm = round(16 * 16**(x/16)), where brightness level x = 1..16 */
static const unsigned int logtable[] =
{1, 2, 3, 4, 6, 8, 11, 16, 23, 32, 45, 64, 91, 128, 181, 256};
{19, 23, 27, 32, 38, 45, 54, 64, 76, 91, 108, 128, 152, 181, 215, 256};
/* set PWM width */
TADATA0 = logtable[brightness];
@ -77,6 +77,8 @@ bool _backlight_init(void)
/* Enable button LEDs: P3.2 (menu/back), P3.3 (cursor), P4.2 (middle) */
PCON3 = (PCON3 & ~0x0000FF00) | 0x00001100;
PCON4 = (PCON4 & ~0x00000F00) | 0x00000100;
PDAT3 &= ~(3 << 2);
PDAT4 &= ~(1 << 2);
/* enable timer clock */
PWRCON &= ~(1 << 4);