6a56c14e17
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
222 lines
7.6 KiB
C
222 lines
7.6 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2002 by Alan Korr
|
|
*
|
|
* All files in this archive are subject to the GNU General Public License.
|
|
* See the file COPYING in the source tree root for full license agreement.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
#include "config.h"
|
|
|
|
#include "hwcompat.h"
|
|
#include "kernel.h"
|
|
#include "lcd.h"
|
|
#include "system.h"
|
|
|
|
/*** definitions ***/
|
|
|
|
#define LCD_SET_LOWER_COLUMN_ADDRESS ((char)0x00)
|
|
#define LCD_SET_HIGHER_COLUMN_ADDRESS ((char)0x10)
|
|
#define LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO ((char)0x20)
|
|
#define LCD_SET_POWER_CONTROL_REGISTER ((char)0x28)
|
|
#define LCD_SET_DISPLAY_START_LINE ((char)0x40)
|
|
#define LCD_SET_CONTRAST_CONTROL_REGISTER ((char)0x81)
|
|
#define LCD_SET_SEGMENT_REMAP ((char)0xA0)
|
|
#define LCD_SET_LCD_BIAS ((char)0xA2)
|
|
#define LCD_SET_ENTIRE_DISPLAY_OFF ((char)0xA4)
|
|
#define LCD_SET_ENTIRE_DISPLAY_ON ((char)0xA5)
|
|
#define LCD_SET_NORMAL_DISPLAY ((char)0xA6)
|
|
#define LCD_SET_REVERSE_DISPLAY ((char)0xA7)
|
|
#define LCD_SET_MULTIPLEX_RATIO ((char)0xA8)
|
|
#define LCD_SET_BIAS_TC_OSC ((char)0xA9)
|
|
#define LCD_SET_1OVER4_BIAS_RATIO ((char)0xAA)
|
|
#define LCD_SET_INDICATOR_OFF ((char)0xAC)
|
|
#define LCD_SET_INDICATOR_ON ((char)0xAD)
|
|
#define LCD_SET_DISPLAY_OFF ((char)0xAE)
|
|
#define LCD_SET_DISPLAY_ON ((char)0xAF)
|
|
#define LCD_SET_PAGE_ADDRESS ((char)0xB0)
|
|
#define LCD_SET_COM_OUTPUT_SCAN_DIRECTION ((char)0xC0)
|
|
#define LCD_SET_TOTAL_FRAME_PHASES ((char)0xD2)
|
|
#define LCD_SET_DISPLAY_OFFSET ((char)0xD3)
|
|
#define LCD_SET_READ_MODIFY_WRITE_MODE ((char)0xE0)
|
|
#define LCD_SOFTWARE_RESET ((char)0xE2)
|
|
#define LCD_NOP ((char)0xE3)
|
|
#define LCD_SET_END_OF_READ_MODIFY_WRITE_MODE ((char)0xEE)
|
|
|
|
/* LCD command codes */
|
|
#define LCD_CNTL_RESET 0xe2 /* Software reset */
|
|
#define LCD_CNTL_POWER 0x2f /* Power control */
|
|
#define LCD_CNTL_CONTRAST 0x81 /* Contrast */
|
|
#define LCD_CNTL_OUTSCAN 0xc8 /* Output scan direction */
|
|
#define LCD_CNTL_SEGREMAP 0xa1 /* Segment remap */
|
|
#define LCD_CNTL_DISPON 0xaf /* Display on */
|
|
|
|
#define LCD_CNTL_PAGE 0xb0 /* Page address */
|
|
#define LCD_CNTL_HIGHCOL 0x10 /* Upper column address */
|
|
#define LCD_CNTL_LOWCOL 0x00 /* Lower column address */
|
|
|
|
/** globals **/
|
|
|
|
static int xoffset; /* needed for flip */
|
|
|
|
/*** hardware configuration ***/
|
|
|
|
int lcd_default_contrast(void)
|
|
{
|
|
return (HW_MASK & LCD_CONTRAST_BIAS) ? 31 : 49;
|
|
}
|
|
|
|
void lcd_set_contrast(int val)
|
|
{
|
|
lcd_write_command(LCD_CNTL_CONTRAST);
|
|
lcd_write_command(val);
|
|
}
|
|
|
|
void lcd_set_invert_display(bool yesno)
|
|
{
|
|
if (yesno)
|
|
lcd_write_command(LCD_SET_REVERSE_DISPLAY);
|
|
else
|
|
lcd_write_command(LCD_SET_NORMAL_DISPLAY);
|
|
}
|
|
|
|
/* turn the display upside down (call lcd_update() afterwards) */
|
|
void lcd_set_flip(bool yesno)
|
|
{
|
|
#ifdef HAVE_DISPLAY_FLIPPED
|
|
if (!yesno)
|
|
#else
|
|
if (yesno)
|
|
#endif
|
|
{
|
|
lcd_write_command(LCD_SET_SEGMENT_REMAP);
|
|
lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
|
|
xoffset = 132 - LCD_WIDTH; /* 132 colums minus the 112 we have */
|
|
}
|
|
else
|
|
{
|
|
lcd_write_command(LCD_SET_SEGMENT_REMAP | 0x01);
|
|
lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION | 0x08);
|
|
xoffset = 0;
|
|
}
|
|
}
|
|
|
|
void lcd_init_device(void)
|
|
{
|
|
/* Initialize PB0-3 as output pins */
|
|
PBCR2 &= 0xff00; /* MD = 00 */
|
|
PBIOR |= 0x000f; /* IOR = 1 */
|
|
|
|
/* inits like the original firmware */
|
|
lcd_write_command(LCD_SOFTWARE_RESET);
|
|
lcd_write_command(LCD_SET_INTERNAL_REGULATOR_RESISTOR_RATIO + 4);
|
|
lcd_write_command(LCD_SET_1OVER4_BIAS_RATIO + 0); /* force 1/4 bias: 0 */
|
|
lcd_write_command(LCD_SET_POWER_CONTROL_REGISTER + 7);
|
|
/* power control register: op-amp=1, regulator=1, booster=1 */
|
|
lcd_write_command(LCD_SET_DISPLAY_ON);
|
|
lcd_write_command(LCD_SET_NORMAL_DISPLAY);
|
|
lcd_set_flip(false);
|
|
lcd_write_command(LCD_SET_DISPLAY_START_LINE + 0);
|
|
lcd_set_contrast(lcd_default_contrast());
|
|
lcd_write_command(LCD_SET_PAGE_ADDRESS);
|
|
lcd_write_command(LCD_SET_LOWER_COLUMN_ADDRESS + 0);
|
|
lcd_write_command(LCD_SET_HIGHER_COLUMN_ADDRESS + 0);
|
|
|
|
lcd_clear_display();
|
|
lcd_update();
|
|
}
|
|
|
|
/*** Update functions ***/
|
|
|
|
/* Performance function that works with an external buffer
|
|
note that by and bheight are in 8-pixel units! */
|
|
void lcd_blit(const unsigned char* data, int x, int by, int width,
|
|
int bheight, int stride)
|
|
{
|
|
/* Copy display bitmap to hardware */
|
|
while (bheight--)
|
|
{
|
|
lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
|
|
lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf));
|
|
lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
|
|
|
|
lcd_write_data(data, width);
|
|
data += stride;
|
|
}
|
|
}
|
|
|
|
/* Helper function for lcd_grey_phase_blit(). */
|
|
void lcd_grey_data(unsigned char *values, unsigned char *phases, int count);
|
|
|
|
/* Performance function that works with an external buffer
|
|
note that by and bheight are in 8-pixel units! */
|
|
void lcd_grey_phase_blit(unsigned char *values, unsigned char *phases,
|
|
int x, int by, int width, int bheight, int stride)
|
|
{
|
|
stride <<= 3; /* 8 pixels per block */
|
|
while (bheight--)
|
|
{
|
|
lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
|
|
lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset)>>4) & 0xf));
|
|
lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
|
|
|
|
lcd_grey_data(values, phases, width);
|
|
values += stride;
|
|
phases += stride;
|
|
}
|
|
}
|
|
|
|
|
|
/* Update the display.
|
|
This must be called after all other LCD functions that change the display. */
|
|
void lcd_update(void)
|
|
{
|
|
int y;
|
|
|
|
/* Copy display bitmap to hardware */
|
|
for (y = 0; y < LCD_FBHEIGHT; y++)
|
|
{
|
|
lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
|
|
lcd_write_command (LCD_CNTL_HIGHCOL | ((xoffset >> 4) & 0xf));
|
|
lcd_write_command (LCD_CNTL_LOWCOL | (xoffset & 0xf));
|
|
|
|
lcd_write_data (lcd_framebuffer[y], LCD_WIDTH);
|
|
}
|
|
}
|
|
|
|
/* Update a fraction of the display. */
|
|
void lcd_update_rect(int x, int y, int width, int height)
|
|
{
|
|
int ymax;
|
|
|
|
/* The Y coordinates have to work on even 8 pixel rows */
|
|
ymax = (y + height-1) >> 3;
|
|
y >>= 3;
|
|
|
|
if(x + width > LCD_WIDTH)
|
|
width = LCD_WIDTH - x;
|
|
if (width <= 0)
|
|
return; /* nothing left to do, 0 is harmful to lcd_write_data() */
|
|
if(ymax >= LCD_FBHEIGHT)
|
|
ymax = LCD_FBHEIGHT-1;
|
|
|
|
/* Copy specified rectange bitmap to hardware */
|
|
for (; y <= ymax; y++)
|
|
{
|
|
lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
|
|
lcd_write_command (LCD_CNTL_HIGHCOL | (((x+xoffset) >> 4) & 0xf));
|
|
lcd_write_command (LCD_CNTL_LOWCOL | ((x+xoffset) & 0xf));
|
|
|
|
lcd_write_data (&lcd_framebuffer[y][x], width);
|
|
}
|
|
}
|