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Diffstat (limited to 'arm7/source/main.c')
| -rw-r--r-- | arm7/source/main.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/arm7/source/main.c b/arm7/source/main.c new file mode 100644 index 0000000..f2a1b98 --- /dev/null +++ b/arm7/source/main.c @@ -0,0 +1,154 @@ +/* + 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(); +} + + |