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/****************************************************************************\
* *
* Copyright by Casimo, 2013 *
* *
* This file is part of fxMaze. *
* *
* fxMaze 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 3 of the License, or *
* (at your option) any later version. *
* *
* fxMaze is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with fxMaze. If not, see <http://www.gnu.org/licenses/>. *
* *
\****************************************************************************/
#include "global.h"
#include "key.h"
#include "hardware.h"
// SHA4 only
static const unsigned short* keyboard_register = (unsigned short*)0xA44B0000;
static unsigned short lastkey[8];
// syscall getkey (non-blocking)
int PRGM_GetKey()
{
unsigned char buffer[12];
Keyboard_PRGM_GetKey( buffer );
return (buffer[1] & 0x0F) * 10 + ((buffer[2] & 0xF0) >> 4);
}
// do I have to explain this?
static void delay()
{
unsigned int i;
for(i=0 ; i<5 ; i++);
}
// fast function for SH3
static unsigned char CheckKeyRow(int code)
{
unsigned int result=0;
short*PORTB_CTRL=(void*)0xA4000102;
short*PORTM_CTRL=(void*)0xA4000118;
char*PORTB=(void*)0xA4000122;
char*PORTM=(void*)0xA4000138;
char*PORTA=(void*)0xA4000120;
short smask;
char cmask;
unsigned char column, row;
column = code>>4;
row = code &0x0F;
smask = 0x0003 << (( row %8)*2);
cmask = ~( 1 << ( row %8) );
if(row <8)
{
*PORTB_CTRL = 0xAAAA ^ smask;
*PORTM_CTRL = (*PORTM_CTRL & 0xFF00 ) | 0x00AA;
delay();
*PORTB = cmask;
*PORTM = (*PORTM & 0xF0 ) | 0x0F;
}
else
{
*PORTB_CTRL = 0xAAAA;
*PORTM_CTRL = ((*PORTM_CTRL & 0xFF00 ) | 0x00AA) ^ smask;
delay();
*PORTB = 0xFF;
*PORTM = (*PORTM & 0xF0 ) | cmask;
}
delay();
result = (~(*PORTA))>>column & 1;
delay();
*PORTB_CTRL = 0xAAAA;
*PORTM_CTRL = (*PORTM_CTRL & 0xFF00 ) | 0x00AA;
delay();
*PORTB_CTRL = 0x5555;
*PORTM_CTRL = (*PORTM_CTRL & 0xFF00 ) | 0x0055;
delay();
return result;
}
// update key buffer
void keyupdate()
{
if(getCalc() == fx9860GII_2)
{
memcpy(lastkey, keyboard_register, sizeof(unsigned short) << 3);
}
}
// check for keypress, depending on the calculator
int keydown(int code)
{
if(getCalc() != UNKNOWN)
{
if(getCalc() == fx9860GII_2)
{
unsigned char row = code%10;
return (0 != (lastkey[row >> 1] & 1 << code / 10 - 1 + ((row & 1) << 3)));
}
else
{
return CheckKeyRow((code % 10) + ((code / 10 - 1) << 4));
}
}
else
{
if(IsEmulator)
{
return CheckKeyRow((code % 10) + ((code / 10 - 1) << 4));
}
else
{
return PRGM_GetKey() == code;
}
}
}
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