From 6701f6a9d4f979cc1eadb673e767b5c46cd2a9c8 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Tue, 10 Apr 2007 23:59:35 +0000
Subject: Initial import

---
 arm7/source/main.c | 154 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 arm7/source/main.c

(limited to 'arm7/source')

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();
+}
+
+
-- 
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