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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Alan Korr
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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"
#include "cpu.h"
/*** definitions ***/
#define SPIDELAY(_x) void(_x);
#define SETMOSI() (PDAT4 |= (1 << 3))
#define CLRMOSI() (PDAT4 &= ~(1 << 3))
#define MISO ((PDAT1 >> 1) & 1)
#define SETCLK() (PDAT4 |= (1 << 2))
#define CLRCLK() (PDAT4 &= ~(1 << 2))
#define SETSS() (PDAT7 |= (1 << 1))
#define CLRSS() (PDAT7 &= ~(1 << 1))
void init_lcd_spi(void)
{
int oldval;
oldval = PCON1;
//Set P1.1 to input
PCON1 = ((oldval & ~(0xf << 4)));
oldval = PCON4;
//Set P4.2 and 4.3 to output
PCON4 = ((oldval & ~(0xf << 8 | 0xf << 12)) | (1 << 8 | 1 << 12));
oldval = PCON4;
//Set P4.2 and 4.3 to output
PCON4 = ((oldval & ~(0xf << 8 | 0xf << 12)) | (1 << 8 | 1 << 12));
oldval = PCON7;
//Set P7.0 and 7.1 to output
PCON7 = ((oldval & ~(0xf << 0 | 0xf << 4)) | (1 << 0 | 1 << 4));
SETSS();
SETCLK();
}
static inline void delay(int duration)
{
volatile int i;
for(i=0;i<duration;i++);
}
unsigned int lcd_spi_io(unsigned int output,unsigned int bits,unsigned int inskip)
{
unsigned int input = 0;
unsigned int i;
//delay(10); // < 470 us
CLRSS();
//delay(13); // > 22 us
for (i = 0; i < bits+inskip; i++) {
CLRCLK();
if(i<bits)
{
if (output & (1 << (bits-1)))
SETMOSI();
else
CLRMOSI();
output <<= 1;
}
else
{
CLRMOSI();
}
//delay(20); // >> 6.7 us
SETCLK();
if(i>=inskip)
{
input <<= 1;
input |= MISO;
}
//delay(20); // >> 6.7 us
}
SETSS();
return (input);
}
void spi_set_reg(unsigned char reg,unsigned short value)
{
lcd_spi_io(0x700000|reg,24,0); // possibly 0x74
lcd_spi_io(0x720000|value,24,0); // possibly 0x77
}
unsigned int lcd_read_id(void)
{
unsigned int device_code;
lcd_spi_io(0x700000,24,0); // possibly 0x74
device_code=lcd_spi_io(0x7300,16,24); // possibly 0x77
return device_code;
}
/** globals **/
static int xoffset; /* needed for flip */
/*** hardware configuration ***/
int lcd_default_contrast(void)
{
return 0x1f;
}
void lcd_set_contrast(int val)
{
}
void lcd_set_invert_display(bool yesno)
{
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
/* TODO: flip mode isn't working. The commands in the else part of
this function are how the original firmware inits the LCD */
if (yesno)
{
xoffset = 132 - LCD_WIDTH; /* 132 colums minus the 128 we have */
}
else
{
xoffset = 0;
}
}
/* LCD init */
void lcd_init_device(void)
{
}
/*** Update functions ***/
/* Performance function that works with an external buffer
note that by and bheight are in 8-pixel units! */
void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
int bheight, int stride)
{
/* Copy display bitmap to hardware */
while (bheight--)
{
}
}
/* Performance function that works with an external buffer
note that by and bheight are in 8-pixel units! */
void lcd_blit_grey_phase_blit(unsigned char *values, unsigned char *phases,
int x, int by, int width, int bheight, int stride)
{
(void)values;
(void)phases;
(void)x;
(void)by;
(void)width;
(void)bheight;
(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;
/* Copy display bitmap to hardware */
for (y = 0; y < LCD_FBHEIGHT; y++)
{
}
}
/* 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;
/* 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++)
{
}
}
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