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Working LCD driver for half the Nano2Gs. It now appears that there are two types of LCD though.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21895 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2009-07-16 00:00:16 +00:00
parent 989021ed3c
commit 02f5a001fe
1 changed files with 54 additions and 20 deletions
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74
firmware/target/arm/s5l8700/ipodnano2g/lcd-nano2g.c
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@ -7,7 +7,7 @@
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 by ????
* Copyright (C) 2009 by Dave Chapman
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@ -26,6 +26,21 @@
#include "system.h"
#include "cpu.h"
/** hardware access functions */
static void s5l_lcd_write_cmd(unsigned short cmd)
{
while (LCD_STATUS&0x10);
LCD_WCMD = cmd;
}
static void s5l_lcd_write_data(int data)
{
LCD_WDATA = data;
while (LCD_STATUS&0x10);
}
/** globals **/
static int xoffset; /* needed for flip */
@ -105,38 +120,57 @@ void lcd_blit_grey_phase_blit(unsigned char *values, unsigned char *phases,
(void)stride;
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void) ICODE_ATTR;
void lcd_update(void)
{
int y;
int x,y;
fb_data* p;
fb_data pixel;
s5l_lcd_write_cmd(0x3a);
s5l_lcd_write_data(0x65);
s5l_lcd_write_cmd(0x2a);
s5l_lcd_write_data(0);
s5l_lcd_write_data(0);
s5l_lcd_write_data(0);
s5l_lcd_write_data(LCD_WIDTH-1);
s5l_lcd_write_cmd(0x2b);
s5l_lcd_write_data(0);
s5l_lcd_write_data(0);
s5l_lcd_write_data(0);
s5l_lcd_write_data(LCD_HEIGHT-1);
s5l_lcd_write_cmd(0x2c);
/* Copy display bitmap to hardware */
for (y = 0; y < LCD_FBHEIGHT; y++)
{
p = &lcd_framebuffer[0][0];
for (y = 0; y < LCD_HEIGHT; y++) {
for (x = 0; x < LCD_WIDTH; x++) {
pixel = *(p++);
while (LCD_STATUS&0x10);
LCD_WDATA = (pixel & 0xff00) >> 8;
LCD_WDATA = pixel & 0xff;
}
}
s5l_lcd_write_cmd(0x29);
}
/* Update a fraction of the display. */
void lcd_update_rect(int, int, int, int) ICODE_ATTR;
void lcd_update_rect(int x, int y, int width, int height)
{
int ymax;
(void)x;
(void)y;
(void)width;
(void)height;
/* 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_update();
}