d462a64a91
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18435 a1c6a512-1295-4272-9138-f99709370657
124 lines
2.6 KiB
C
124 lines
2.6 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2008 Vitja Makarov
|
|
*
|
|
* 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 "cpu.h"
|
|
#include "button.h"
|
|
|
|
#include "ata2501.h"
|
|
|
|
#define STB (1<<5)
|
|
#define SDATA (1<<4)
|
|
#define RESET (1<<6)
|
|
#define SIFMD (1<<7)
|
|
#define STB_DELAY 200
|
|
|
|
#define udelay _udelay
|
|
|
|
/* do we really need it? */
|
|
static void _udelay(int cycles)
|
|
{
|
|
cycles /= 8;
|
|
while (cycles--) {
|
|
asm("nop;nop;");
|
|
}
|
|
}
|
|
|
|
/*
|
|
TODO: sensitivity using GPIOS
|
|
*/
|
|
void ata2501_init(void)
|
|
{
|
|
GPIOD_DIR |= (RESET | STB | SIFMD | (1 << 8) | (1 << 9));
|
|
GPIOD_DIR &= ~(SDATA);
|
|
|
|
GPIOD &= ~RESET;
|
|
udelay(1000);
|
|
|
|
GPIOD |= RESET;
|
|
|
|
GPIOD &= ~STB;
|
|
|
|
#if 1
|
|
GPIOD &= ~((1 << 9) | (1 << 8));
|
|
GPIOD |= ((1 << 8) | SIFMD) | (1 << 9);
|
|
#else
|
|
GPIOD |= ((1 << 9) | (1 << 8));
|
|
GPIOD &= ~(SIFMD);
|
|
#endif
|
|
}
|
|
|
|
unsigned short ata2501_read(void)
|
|
{
|
|
unsigned short ret = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < 12; i++) {
|
|
GPIOD |= STB;
|
|
udelay(50);
|
|
|
|
ret <<= 1;
|
|
if (GPIOD & SDATA)
|
|
ret |= 1;
|
|
udelay(50);
|
|
GPIOD &= ~STB;
|
|
udelay(100);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define ATA2501_TEST
|
|
#ifdef ATA2501_TEST
|
|
#include "lcd.h"
|
|
#include "sprintf.h"
|
|
|
|
static
|
|
void bits(char *str, unsigned short val)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 12; i++)
|
|
str[i] = (val & (1 << i)) ? '1' : '0';
|
|
str[i] = 0;
|
|
}
|
|
|
|
void ata2501_test(void)
|
|
{
|
|
char buf[100];
|
|
ata2501_init();
|
|
|
|
while (1) {
|
|
unsigned short data;
|
|
int i, line = 0;
|
|
|
|
data = ata2501_read();
|
|
lcd_clear_display();
|
|
lcd_puts(0, line++, "ATA2501 test");
|
|
|
|
bits(buf, data);
|
|
lcd_puts(0, line++, buf);
|
|
|
|
lcd_update();
|
|
udelay(2000);
|
|
}
|
|
}
|
|
#endif
|