110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2002 by Daniel Stenberg <daniel@haxx.se>
|
|
*
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/*
|
|
* Hardware-specific implementations for the Archos Recorder LCD.
|
|
*
|
|
* Archos Jukebox Recorder LCD functions.
|
|
* Solomon SSD1815Z controller and Shing Yih Technology G112064-30 LCD.
|
|
*
|
|
*/
|
|
|
|
/* 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 */
|
|
|
|
|
|
/*
|
|
* Initialize LCD
|
|
*/
|
|
void lcd_init (void)
|
|
{
|
|
/* Initialize PB0-3 as output pins */
|
|
PBCR2 &= 0xff00; /* MD = 00 */
|
|
PBIOR |= 0x000f; /* IOR = 1 */
|
|
|
|
/* Initialize LCD */
|
|
lcd_write (TRUE, LCD_CNTL_RESET);
|
|
lcd_write (TRUE, LCD_CNTL_POWER);
|
|
lcd_write (TRUE, LCD_CNTL_SEGREMAP);
|
|
lcd_write (TRUE, LCD_CNTL_OUTSCAN);
|
|
lcd_write (TRUE, LCD_CNTL_CONTRAST);
|
|
lcd_write (TRUE, 0x30); /* contrast parameter */
|
|
lcd_write (TRUE, LCD_CNTL_DISPON);
|
|
|
|
lcd_clear();
|
|
lcd_update();
|
|
}
|
|
|
|
/*
|
|
* Update the display.
|
|
* This must be called after all other LCD funtions that change the display.
|
|
*/
|
|
void lcd_update (void)
|
|
{
|
|
int row, col;
|
|
|
|
/* Copy display bitmap to hardware */
|
|
for (row = 0; row < DISP_Y/8; row++) {
|
|
lcd_write (TRUE, LCD_CNTL_PAGE | (row & 0xf));
|
|
lcd_write (TRUE, LCD_CNTL_HIGHCOL);
|
|
lcd_write (TRUE, LCD_CNTL_LOWCOL);
|
|
|
|
for (col = 0; col < DISP_X; col++)
|
|
lcd_write (FALSE, display[row][col]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Write a byte to LCD controller.
|
|
* command is TRUE if value is a command byte.
|
|
*/
|
|
static void lcd_write (BOOL command, int value)
|
|
{
|
|
int i;
|
|
|
|
/* Read PBDR, clear LCD bits */
|
|
int pbdr = PBDR & ~(PBDR_LCD_CS1|PBDR_LCD_DC|PBDR_LCD_SDA|PBDR_LCD_SCK);
|
|
if (!command)
|
|
pbdr |= PBDR_LCD_DC; /* set data indicator */
|
|
|
|
/* Send each bit, starting with MSB */
|
|
for (i = 0; i < 8; i++) {
|
|
if (value & 0x80) {
|
|
/* Set data, toggle clock */
|
|
PBDR = pbdr | PBDR_LCD_SDA;
|
|
PBDR = pbdr | PBDR_LCD_SDA | PBDR_LCD_SCK;
|
|
}
|
|
else {
|
|
/* Clear data, toggle clock */
|
|
PBDR = pbdr;
|
|
PBDR = pbdr | PBDR_LCD_SCK;
|
|
}
|
|
value <<= 1;
|
|
}
|
|
}
|