/*
This file is part of JOP, the Java Optimized Processor
see <http://www.jopdesign.com/>
Copyright (C) 2001-2008, 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/>.
*/
/*
* Created on 30.05.2005
*
*/
package dsp;
import com.jopdesign.sys.Const;
import com.jopdesign.sys.Native;
/**
* @author admin
*
*/
public class Example {
// This values depends on the ADC!!!
final static int OFFSET = 1550;
final static int FSAMP = 30000;
final static int ABC = 65535;
public static void main(String[] args) {
int cnt = 0;
int cnt2 = 0;
int add = 1;
int add2 = 3;
int left, right;
int val;
int sig = 0;
for(;;) {
// wait for next sample time
val = Native.rdMem(Const.WB_TS0);
if (val>0) {
continue;
}
// we don't use val
cnt += add;
if (cnt>=ABC) {
cnt = ABC;
add = -11;
} else if (cnt<=0) {
add = 11;
cnt = 0;
}
cnt2 += add2;
if (cnt2>=ABC) {
cnt2 = ABC;
add2 = -13;
} else if (cnt2<=0) {
cnt2 = 0;
add2 = 13;
}
sig = (sig+1) & 0x7f;
int rec = (sig & 0x40)<<1;
int saw = sig;
left = (rec*cnt + saw*(0xffff-cnt2))>>16;
right = (saw*cnt2 + rec*(0xffff-cnt))>>16;
val = left + (right<<16);
Native.wrMem(val, Const.WB_TS0);
// Test if we missed the sample output
val = Native.rdMem(Const.WB_TS0);
if (val<0) {
System.out.print('*');
}
}
}
}