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/*
ds81 - Nintendo DS ZX81 emulator.
Copyright (C) 2006 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 file is largely based on the libnds examples.
*/
#include <nds.h>
#include <nds/bios.h>
#include <nds/arm7/touch.h>
#include <nds/arm7/clock.h>
#include <dswifi7.h>
#include "ds81_ipc.h"
static void FIFO_Handler(u32 msg);
static void VblankHandler(void)
{
static int heartbeat = 0;
uint16 but=0, x=0, y=0, xpx=0, ypx=0, z1=0, z2=0, batt=0, aux=0;
int t1=0, t2=0;
uint32 temp=0;
uint8 ct[sizeof(IPC->curtime)];
u32 i;
/* Update the heartbeat */
heartbeat++;
/* Read the touch screen */
but = REG_KEYXY;
if (!(but & (1<<6)))
{
touchPosition tempPos = touchReadXY();
x = tempPos.x;
y = tempPos.y;
xpx = tempPos.px;
ypx = tempPos.py;
}
z1 = touchRead(TSC_MEASURE_Z1);
z2 = touchRead(TSC_MEASURE_Z2);
batt = touchRead(TSC_MEASURE_BATTERY);
aux = touchRead(TSC_MEASURE_AUX);
/* Read the time */
rtcGetTime((uint8 *)ct);
BCDToInteger((uint8 *)&(ct[1]), 7);
/* Read the temperature */
temp = touchReadTemperature(&t1, &t2);
/* Update the IPC struct */
IPC->mailBusy = 1;
IPC->heartbeat = heartbeat;
IPC->buttons = but;
IPC->touchX = x;
IPC->touchY = y;
IPC->touchXpx = xpx;
IPC->touchYpx = ypx;
IPC->touchZ1 = z1;
IPC->touchZ2 = z2;
IPC->battery = batt;
IPC->aux = aux;
for(i=0; i<sizeof(ct); i++)
{
IPC->curtime[i] = ct[i];
}
IPC->temperature = temp;
IPC->tdiode1 = t1;
IPC->tdiode2 = t2;
IPC->mailBusy = 0;
Wifi_Update();
}
/* callback to allow wifi library to notify arm9
*/
static void ARM7_SyncToARM9(void)
{
REG_IPC_FIFO_TX = DS81_WIFI_SYNC_IPC;
}
/* interrupt handler to allow incoming notifications from arm9
*/
static void ARM7_Fifo(void)
{
while(!(REG_IPC_FIFO_CR & IPC_FIFO_RECV_EMPTY))
{
u32 msg;
msg = REG_IPC_FIFO_RX;
FIFO_Handler(msg);
}
}
/* Handler for FIFO messages
*/
static void FIFO_Handler(u32 msg)
{
static int next_is_wifi=0;
if (next_is_wifi)
{
next_is_wifi = 0;
Wifi_Init(msg);
Wifi_SetSyncHandler(ARM7_SyncToARM9);
irqSet(IRQ_WIFI, Wifi_Interrupt);
irqEnable(IRQ_WIFI);
}
else
{
switch(msg)
{
case DS81_WIFI_INIT_IPC:
next_is_wifi = 1;
break;
case DS81_WIFI_SYNC_IPC:
Wifi_Sync();
break;
}
}
}
int main(int argc, char ** argv)
{
/* enable & prepare fifo asap */
REG_IPC_FIFO_CR = IPC_FIFO_ENABLE | IPC_FIFO_SEND_CLEAR;
IPC->mailBusy = 1;
/* Reset the clock if needed */
rtcReset();
irqInit();
irqSet(IRQ_VBLANK, VblankHandler);
irqEnable(IRQ_VBLANK);
irqSet(IRQ_FIFO_NOT_EMPTY,ARM7_Fifo); /* set up fifo irq */
irqEnable(IRQ_FIFO_NOT_EMPTY);
REG_IPC_FIFO_CR = IPC_FIFO_ENABLE | IPC_FIFO_RECV_IRQ;
while (1)
{
swiWaitForVBlank();
}
}
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