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Patch FS#5712 by Michael Sevakis - X5 Backlight brightness improvement/fix

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10322 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2006-07-25 15:21:31 +00:00
parent 8bb4bab54b
commit f18f9a8061
6 changed files with 32 additions and 19 deletions
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5
firmware/target/coldfire/iaudio/x5/backlight-x5.c
View file

@ -25,14 +25,13 @@
void __backlight_on(void)
{
int level = set_irq_level(HIGHEST_IRQ_LEVEL);
pcf50606_write(0x38, 0x30); /* Backlight ON */
pcf50606_write(0x38, 0xb0); /* Backlight ON, GPO1INV=1, GPO1ACT=011 */
set_irq_level(level);
}
void __backlight_off(void)
{
int level = set_irq_level(HIGHEST_IRQ_LEVEL);
pcf50606_write(0x38, 0x70); /* Backlight OFF */
pcf50606_write(0x38, 0x80); /* Backlight OFF, GPO1INV=1, GPO1ACT=000 */
set_irq_level(level);
}

10
firmware/target/coldfire/iaudio/x5/pcf50606-x5.c
View file

@ -169,6 +169,12 @@ void pcf50606_init(void)
pcf50606_write(0x39, 0x00); /* GPOOD0 = green led OFF */
pcf50606_write(0x3a, 0x00); /* GPOOD1 = red led OFF */
pcf50606_write(0x35, 0xf1); /* Backlight PWM = 7kHz 8/16 */
pcf50606_write(0x38, 0x30); /* Backlight ON */
/* D305A datasheet says PWM clock frequency should be 400Hz - 2000Hz so
* I changed it from 7kHz to 512Hz. The lower frequency looks the same.
* GPO1 is also inverted so that display brightness increases with PWM
* setting which also lets the X5 share the H300's
* set_backlight_brightness code.
*/
pcf50606_write(0x35, 0x11); /* Backlight PWM = 512Hz, 8/16, Active */
pcf50606_write(0x38, 0xb0); /* Backlight ON, GPO1INV=1, GPO1ACT=011 */
}