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/*
ds48 - Nintendo DS ZX Spectrum emulator.
Copyright (C) 2007 Ian Cowburn <ianc@noddybox.co.uk>
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 program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
$Id$
This code is based on the example templates for ndslib
*/
#include <nds.h>
#include <stdlib.h>
//---------------------------------------------------------------------------------
void startSound(int sampleRate, const void* data, u32 bytes, u8 channel, u8 vol, u8 pan, u8 format) {
//---------------------------------------------------------------------------------
SCHANNEL_TIMER(channel) = SOUND_FREQ(sampleRate);
SCHANNEL_SOURCE(channel) = (u32)data;
SCHANNEL_LENGTH(channel) = bytes >> 2 ;
SCHANNEL_CR(channel) = SCHANNEL_ENABLE | SOUND_ONE_SHOT | SOUND_VOL(vol) | SOUND_PAN(pan) | (format==1?SOUND_8BIT:SOUND_16BIT);
}
//---------------------------------------------------------------------------------
s32 getFreeSoundChannel() {
//---------------------------------------------------------------------------------
int i;
for (i=0; i<16; i++) {
if ( (SCHANNEL_CR(i) & SCHANNEL_ENABLE) == 0 ) return i;
}
return -1;
}
int vcount;
touchPosition first,tempPos;
//---------------------------------------------------------------------------------
void VcountHandler() {
//---------------------------------------------------------------------------------
static int lastbut = -1;
uint16 but=0, x=0, y=0, xpx=0, ypx=0, z1=0, z2=0;
but = REG_KEYXY;
if (!( (but ^ lastbut) & (1<<6))) {
tempPos = touchReadXY();
if ( tempPos.x == 0 || tempPos.y == 0 ) {
but |= (1 <<6);
lastbut = but;
} else {
x = tempPos.x;
y = tempPos.y;
xpx = tempPos.px;
ypx = tempPos.py;
z1 = tempPos.z1;
z2 = tempPos.z2;
}
} else {
lastbut = but;
but |= (1 <<6);
}
if ( vcount == 80 ) {
first = tempPos;
} else {
if ( abs( xpx - first.px) > 10 || abs( ypx - first.py) > 10 ||
(but & ( 1<<6)) ) {
but |= (1 <<6);
lastbut = but;
} else {
IPC->mailBusy = 1;
IPC->touchX = x;
IPC->touchY = y;
IPC->touchXpx = xpx;
IPC->touchYpx = ypx;
IPC->touchZ1 = z1;
IPC->touchZ2 = z2;
IPC->mailBusy = 0;
}
}
IPC->buttons = but;
vcount ^= (80 ^ 130);
SetYtrigger(vcount);
}
//---------------------------------------------------------------------------------
void VblankHandler(void) {
//---------------------------------------------------------------------------------
u32 i;
//sound code :)
TransferSound *snd = IPC->soundData;
IPC->soundData = 0;
if (0 != snd) {
for (i=0; i<snd->count; i++) {
s32 chan = getFreeSoundChannel();
if (chan >= 0) {
startSound(snd->data[i].rate, snd->data[i].data, snd->data[i].len, chan, snd->data[i].vol, snd->data[i].pan, snd->data[i].format);
}
}
}
}
//---------------------------------------------------------------------------------
int main(int argc, char ** argv) {
//---------------------------------------------------------------------------------
// Reset the clock if needed
rtcReset();
//enable sound
powerON(POWER_SOUND);
SOUND_CR = SOUND_ENABLE | SOUND_VOL(0x7F);
IPC->soundData = 0;
irqInit();
irqSet(IRQ_VBLANK, VblankHandler);
SetYtrigger(80);
vcount = 80;
irqSet(IRQ_VCOUNT, VcountHandler);
irqEnable(IRQ_VBLANK | IRQ_VCOUNT);
// Keep the ARM7 idle
while (1) swiWaitForVBlank();
}
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