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Subject: X5 lcd

X5 lcd

From: RaeNye <raenye_at_netvision.net.il>
Date: 2006-04-25

Hi,

During the disassembly of the X5 preloader I'm been going over the low-level
stuff, and I saw two interesting points:

1. LCD init in lcd-x5.c is somewhat different; see the corrected routine at
the end
(I'll make a real diff of it once my linux reestablishes awareness of grub
on its boot sector)

2. Backlight brightness is modified by setting the backlight PWM:

pcf50606_write(0x35, 0xFF-(level<<1)); // level = 0..10, cowon uses level=5

So we can support backlight brightness on X5 (prolly in H3x0 too).

Slowly but surely,
R.

-----------8<-----------------------------8<-----------------------------8<-
-----------------

/* LCD init
 * These settings are taken from the original X5 firmware
 */
void lcd_init_device(void)
{
    display_on=true;

    /* LCD Reset */
    and_l(~0x00000010, &GPIO1_OUT);
    or_l(0x00000010, &GPIO1_ENABLE);
    or_l(0x00000010, &GPIO1_FUNCTION);
    sleep(HZ/100);
    or_l(0x00000010, &GPIO1_OUT);

    sleep(HZ/100);

    lcd_write_reg(0, 0x0001);
    
    sleep(HZ/50);
    
    lcd_write_reg(0x0d, 0x0401);
    lcd_write_reg(0x0e, 0x321e);
    lcd_write_reg(0x01, 0x0313); // was: 0x0113
    lcd_write_reg(0x02, 0x0700);
    lcd_write_reg(0x05, 0x9018); // was: 0x9038
    lcd_write_reg(0x06, 0x0000);
    lcd_write_reg(0x0b, 0x4000);
    
    sleep(HZ/100);
    
    lcd_write_reg(0x21,0x0000);
    lcd_write_reg(0x30,0x0003);
    lcd_write_reg(0x31,0x0400);
    lcd_write_reg(0x32,0x0407);
    lcd_write_reg(0x33,0x0305);
    lcd_write_reg(0x34,0x0003);
    lcd_write_reg(0x35,0x0704);
    lcd_write_reg(0x36,0x0000); // was: 0x0407
    lcd_write_reg(0x37,0x0503);
    lcd_write_reg(0x0f,0x0000); // was: 0x0002
    lcd_write_reg(0x11,0x0000);
    lcd_write_reg(0x14,0x9f00);
    lcd_write_reg(0x15,0x5c00);
    lcd_write_reg(0x16,0x7f00);
    lcd_write_reg(0x17,0x0000); // was: 0x9f00
    lcd_write_reg(0x3a,0x1409);
    lcd_write_reg(0x3b,0x0602);
    
    lcd_write_reg(0x0c,0x0001);

    sleep(HZ/25);
    
    lcd_write_reg(0x03,0x002c);
    lcd_write_reg(0x04,0x8000);

    sleep(HZ/25);
    
    lcd_write_reg(0x0e,0x281e + (5<<9)); // was: 0x3318
    
    sleep(HZ/25);
    
    lcd_write_reg(0x0d,0x0411);

    sleep(HZ/100);
    
    lcd_write_reg(0x07,0x0006);
    lcd_write_reg(0x07,0x0036);
    lcd_write_reg(0x07,0x0037);
    lcd_write_reg(0x07,0x0037);
    return;
}
Received on Tue Apr 25 01:07:44 2006


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