/*
This file is part of JOP, the Java Optimized Processor
see <http://www.jopdesign.com/>
Copyright (C) 2009, Martin Schoeberl (martin@jopdesign.com)
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 3 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, see <http://www.gnu.org/licenses/>.
*/
/**
*
*/
package ptolemy.deadline;
import util.Timer;
import joprt.RtThread;
import com.jopdesign.io.DspioFactory;
import com.jopdesign.io.OutPort;
import com.jopdesign.io.SysDevice;
import com.jopdesign.sys.Const;
import com.jopdesign.sys.Native;
/**
* Use deadline timer for sound generation with PWM.
*
* @author Martin Schoeberl (martin@jopdesign.com)
*
*/
public class Sound {
final static int PERIOD = 60000000/44100;
public static void main(String[] args) {
int time, off, val, idx;
SysDevice sys = DspioFactory.getDspioFactory().getSysDevice();
OutPort pwm = DspioFactory.getDspioFactory().getOutPort();
int samples[] = new int[16*4*1024];
val = 0;
for (int i=0; i<16*4*1024; ++i) {
// val += 149;
val += 1490;
if (val>65535) val = 0;
samples[i] = val>>>6;
}
System.out.println("Period: "+PERIOD);
time = sys.cntInt;
val = 300;
time += 1000;
idx = 0;
// for (;;) {
// time += 30;
// Native.wr(time, Const.IO_DEADLINE);
// Native.wr(3, Const.IO_DSPIO_OUT);
// time += 30;
// Native.wr(time, Const.IO_DEADLINE);
// Native.wr(0, Const.IO_DSPIO_OUT);
// }
for (;;) {
time += PERIOD;
++idx;
idx &= 0xffff;
val = 100+samples[idx];
off = time + val;
sys.deadLine = time;
pwm.port = 3;
sys.deadLine = off; // some offset is needed - we have now a 1 offset
pwm.port = 0; // and a 1 phase offset. Is this ok?
}
}
}