diff options
Diffstat (limited to 'firmware/target/arm/s5l8700/yps3/backlight-yps3.c')
| -rw-r--r-- | firmware/target/arm/s5l8700/yps3/backlight-yps3.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/firmware/target/arm/s5l8700/yps3/backlight-yps3.c b/firmware/target/arm/s5l8700/yps3/backlight-yps3.c index 1fdcc8347d..d543687825 100644 --- a/firmware/target/arm/s5l8700/yps3/backlight-yps3.c +++ b/firmware/target/arm/s5l8700/yps3/backlight-yps3.c @@ -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); |