diff options
| author | Bertrik Sikken <bertrik@sikken.nl> | 2009-08-01 18:53:29 +0000 |
|---|---|---|
| committer | Bertrik Sikken <bertrik@sikken.nl> | 2009-08-01 18:53:29 +0000 |
| commit | e454d88b88b278cf079c04d4052b11e85c605425 (patch) | |
| tree | ba92690bea20642515b9fdc3dbd08bd6c20831e2 /firmware/target | |
| parent | 1b2fe50f3dd6d808fffc707428b39329a15d5752 (diff) | |
| download | rockbox-e454d88b88b278cf079c04d4052b11e85c605425.tar.gz rockbox-e454d88b88b278cf079c04d4052b11e85c605425.zip | |
Samsung YP-S3: update backlight brightness curve so backlight is still on at the minimum brightness setting
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22103 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target')
| -rw-r--r-- | firmware/target/arm/s5l8700/yps3/backlight-yps3.c | 34 |
1 files changed, 18 insertions, 16 deletions
diff --git a/firmware/target/arm/s5l8700/yps3/backlight-yps3.c b/firmware/target/arm/s5l8700/yps3/backlight-yps3.c index 7fda82a29c..1fdcc8347d 100644 --- a/firmware/target/arm/s5l8700/yps3/backlight-yps3.c +++ b/firmware/target/arm/s5l8700/yps3/backlight-yps3.c @@ -37,22 +37,27 @@ void _backlight_set_brightness(int brightness) { - /* pwm = (sqrt(2)**x)-1, where brightness level x = 0..16 */ - static const unsigned char logtable[] = - {0, 1, 2, 3, 5, 7, 10, 15, 22, 31, 44, 63, 90, 127, 180, 255}; + /* pwm = round(sqrt(2)**x), 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}; /* set PWM width */ - TADATA0 = 255 - logtable[brightness]; + TADATA0 = logtable[brightness]; } void _backlight_on(void) { + /* configure backlight pin P0.0 as timer PWM output */ + PCON0 = ((PCON0 & ~(3 << 0)) | (2 << 0)); + _backlight_set_brightness(backlight_brightness); } void _backlight_off(void) { - _backlight_set_brightness(MIN_BRIGHTNESS_SETTING); + /* configure backlight pin P0.0 as GPIO and switch off */ + PCON0 = ((PCON0 & ~(3 << 0)) | (1 << 0)); + PDAT0 &= ~(1 << 0); } void _buttonlight_on(void) @@ -73,22 +78,19 @@ bool _backlight_init(void) PCON3 = (PCON3 & ~0x0000FF00) | 0x00001100; PCON4 = (PCON4 & ~0x00000F00) | 0x00000100; - /* enable backlight pin as timer output */ - PCON0 = ((PCON0 & ~(3 << 0)) | (2 << 0)); - /* enable timer clock */ PWRCON &= ~(1 << 4); /* configure timer */ - TACMD = (1 << 1); /* TC_CLR */ - TACON = (0 << 13) | /* TC_INT1_EN */ - (0 << 12) | /* TC_INT0_EN */ - (0 << 11) | /* TC_START */ - (3 << 8) | /* TC_CS = PCLK / 64 */ - (1 << 4); /* TC_MODE_SEL = PWM mode */ - TADATA1 = 255; /* set PWM period */ + TACMD = (1 << 1); /* TA_CLR */ + TACON = (0 << 13) | /* TA_INT1_EN */ + (0 << 12) | /* TA_INT0_EN */ + (1 << 11) | /* TA_START */ + (3 << 8) | /* TA_CS = PCLK / 64 */ + (1 << 4); /* TA_MODE_SEL = PWM mode */ + TADATA1 = 256; /* set PWM period */ TAPRE = 20; /* prescaler */ - TACMD = (1 << 0); /* TC_EN */ + TACMD = (1 << 0); /* TA_EN */ _backlight_on(); |