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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Daniel Stenberg
*
* 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.
*
****************************************************************************/
/*
* Archos Jukebox Recorder button functions
*/
#include "config.h"
#include "sh7034.h"
#include "button.h"
#ifdef HAVE_RECORDER_KEYPAD
/* AJBR buttons are connected to the CPU as follows:
*
* ON and OFF are connected to separate port B input pins.
*
* F1, F2, F3, and UP are connected to the AN4 analog input, each through
* a separate voltage divider. The voltage on AN4 depends on which button
* (or none, or a combination) is pressed.
*
* DOWN, PLAY, LEFT, and RIGHT are likewise connected to AN5. */
/* Button voltage levels on AN4 and AN5 */
#define LEVEL1 50
#define LEVEL2 125
#define LEVEL3 175
#define LEVEL4 225
/* Number of calls to get_button for a button to stop bouncing
* and to be considered held down.
* Should really use a hardware timer for this.
*/
#define BOUNCE_COUNT 200
#define HOLD_COUNT 10000
static int last; /* Last button pressed */
static int count; /* Number of calls button has been down */
/*
*Initialize buttons
*/
void button_init()
{
#ifndef SIMULATOR
/* Set PB4 and PB8 as input pins */
PBCR1 &= 0xfffc; /* PB8MD = 00 */
PBCR2 &= 0xfcff; /* PB4MD = 00 */
PBIOR &= ~(PBDR_BTN_ON|PBDR_BTN_OFF); /* Inputs */
/* Set A/D to scan AN4 and AN5.
* This needs to be changed to scan other analog pins
* for battery level, etc. */
ADCSR = 0;
ADCR = 0;
ADCSR = ADCSR_ADST | ADCSR_SCAN | 0x5;
#endif
last = BUTTON_NONE;
count = 0;
}
/*
* Get button pressed from hardware
*/
static int get_raw_button (void)
{
/* Check port B pins for ON and OFF */
int data = PBDR;
if ((data & PBDR_BTN_ON) == 0)
return BUTTON_ON;
else if ((data & PBDR_BTN_OFF) == 0)
return BUTTON_OFF;
/* Check AN4 pin for F1-3 and UP */
data = ADDRAH;
if (data >= LEVEL4)
return BUTTON_F3;
else if (data >= LEVEL3)
return BUTTON_UP;
else if (data >= LEVEL2)
return BUTTON_F2;
else if (data >= LEVEL1)
return BUTTON_F1;
/* Check AN5 pin for DOWN, PLAY, LEFT, RIGHT */
data = ADDRBH;
if (data >= LEVEL4)
return BUTTON_DOWN;
else if (data >= LEVEL3)
return BUTTON_PLAY;
else if (data >= LEVEL2)
return BUTTON_LEFT;
else if (data >= LEVEL1)
return BUTTON_RIGHT;
return BUTTON_NONE;
}
/*
* Get the currently pressed button.
* Returns one of BUTTON_xxx codes, with possibly a modifier bit set.
* No modifier bits are set when the button is first pressed.
* BUTTON_HELD bit is while the button is being held.
* BUTTON_REL bit is set when button has been released.
*/
int button_get(void)
{
int btn = get_raw_button();
int ret;
/* Last button pressed is still down */
if (btn != BUTTON_NONE && btn == last) {
count++;
if (count == BOUNCE_COUNT)
return btn;
else if (count >= HOLD_COUNT)
return btn | BUTTON_HELD;
else
return BUTTON_NONE;
}
/* Last button pressed now released */
if (btn == BUTTON_NONE && last != BUTTON_NONE)
ret = last | BUTTON_REL;
else
ret = BUTTON_NONE;
last = btn;
count = 0;
return ret;
}
#elif HAVE_PLAYER_KEYPAD
/* The player has all buttons on port pins:
LEFT: PC0
RIGHT: PC2
PLAY: PC3
STOP: PA11
ON: PA5
MENU: PC1
*/
void button_init(void)
{
/* set port pins as input */
PAIOR &= ~0x820;
}
int button_get(void)
{
int porta = PADR;
int portc = PCDR;
int btn = 0;
if ( portc & 1 )
btn |= BUTTON_LEFT;
if ( portc & 2 )
btn |= BUTTON_MENU;
if ( portc & 4 )
btn |= BUTTON_RIGHT;
if ( portc & 8 )
btn |= BUTTON_PLAY | BUTTON_UP;
if ( porta & 0x20 )
btn |= BUTTON_ON;
if ( porta & 0x800 )
btn |= BUTTON_STOP | BUTTON_DOWN;
return btn;
}
#endif
/* -----------------------------------------------------------------
* local variables:
* eval: (load-file "../rockbox-mode.el")
* end:
*/
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