Patch No 1387627 by Peter D'Hoye: Backlight Brightness setting for H300

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8280 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 20 insertions, 1 deletions

diff --git a/firmware/drivers/pcf50606.c b/firmware/drivers/pcf50606.c
index b99b2e9e88..cb05d25345 100644
--- a/firmware/drivers/pcf50606.c
+++ b/firmware/drivers/pcf50606.c
@@ -44,6 +44,7 @@
 /* delay loop to achieve 400kHz at 120MHz CPU frequency */
 #define DELAY    do { int _x; for(_x=0;_x<22;_x++);} while(0)
 
+void pcf50606_set_bl_pwm(unsigned char ucVal);
 
 static void pcf50606_i2c_start(void)
 {
@@ -281,5 +282,23 @@ void pcf50606_init(void)
     set_voltages();
 
     /* Backlight PWM = 512Hz 50/50 */
-    pcf50606_write(0x35, 0x13);
+    /*pcf50606_write(0x35, 0x13);*/
+    pcf50606_set_bl_pwm(9);
+}
+
+void pcf50606_set_bl_pwm(unsigned char ucVal)
+{
+    /* set the backlight PWM */
+    /* range is 0 - 15 */
+
+    /* limit incoming value */
+    ucVal = ucVal & 0x0F;   
+
+    /* shift one bit left */
+    ucVal = ucVal << 1;
+    ucVal = ucVal | 0x01;
+
+    /* 0x00 = 512Hz */
+    ucVal = ucVal | 0x00;   
+    pcf50606_write(0x35, ucVal);
 }