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146
trunk/Arduino/libraries/SID/examples/Noise/Noise.ino
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146
trunk/Arduino/libraries/SID/examples/Noise/Noise.ino
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#include <SID.h>
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/************************************************************************
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Arduino controls an
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Atmega8 MOS6581 SID Emulator
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( SID = Sound Interface Device )
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This example sets a noise sound in the SID and changes the frequency
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from low to high.
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This creates a kind of space sound as used in the 1980 games.
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****************************************************************************
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date authors version comment
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====== ====================== ======= ==============================
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2007 (ch) Christoph Haberer V1.0 First implemetation
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2012 Mario Patino V1.1 Ported to SID Library
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Versions:
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V1.0
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- noise with variable frequency
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V1.1
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- The SID chip is implemented as a library thus making the serial
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communication unnecessary
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***************************************************************************/
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/***************************************************************************
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*
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* (c) 2007 Christoph Haberer, christoph(at)roboterclub-freiburg.de
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*
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***************************************************************************
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation version 2 of the License, *
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* If you extend the program please maintain the list of authors. *
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* If you want to use this software for commercial purposes and you *
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* don't want to make it open source, please contact the authors for *
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* licensing. *
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***************************************************************************/
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#define C4_1 1,0x11,0,0x25, // C4 tone pitch
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#define OFF 0
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#define CONTROLREG 4 // SID control register address
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#define GATE (1<<0)
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// waveforms
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#define SETNOISE_1 4,0x81,5,0xBB,6,0xAD, // SID register setup to create noise
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SID mySid;
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void setup() {
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digitalWrite(13, HIGH); //turn on debugging LED
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mySid.begin();
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}
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/************************************************************************
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void setwaveform_noise(uint8_t channel)
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Set sid registers to create a noise waveform.
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The SID has 3 channels, which should be accesed according to this
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definition:
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#define CHANNEL1 0
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#define CHANNEL2 7
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#define CHANNEL3 14
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For noise sounds it makes sense to use only one channel, because
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using multiple channels gives almost no audible difference.
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************************************************************************/
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void setwaveform_noise(uint8_t channel)
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{
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uint8_t dataset[]={SETNOISE_1 C4_1 0xFF};
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uint8_t n=0;
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while(dataset[n]!=0xFF)
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{
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mySid.set_register(channel+dataset[n], dataset[n+1]);
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// register address, register content
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n+=2;
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}
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}
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/************************************************************************
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void set_frequency(uint16_t pitch,uint8_t channel)
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Set sid frequncy registers.
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The pitch has to be:
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pitch=16.77*frequency
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The SID has 3 channels, which should be accesed according to this
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definition:
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#define CHANNEL1 0
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#define CHANNEL2 7
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#define CHANNEL3 14
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************************************************************************/
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// pitch=16.77*frequency
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void set_frequency(uint16_t pitch,uint8_t channel)
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{
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mySid.set_register(channel, pitch&0xFF); // low register adress
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mySid.set_register(channel+1, pitch>>8); // high register adress
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}
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#define CHANNEL1 0
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/************************************************************************
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main loop
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create space ship noise
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************************************************************************/
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void loop()
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{
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uint16_t n;
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uint8_t flag,k;
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uint16_t soundindex=0;
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setwaveform_noise(CHANNEL1);
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for(k=0;k<10;k++) // ten times space ship noise
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{
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for(n=100;n<1000;n+=50)
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{
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set_frequency(n*17,CHANNEL1); // change noise generator frequency
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delay(50);// every 50ms
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}
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}
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mySid.set_register(CONTROLREG+CHANNEL1, OFF); // be quite SID!
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while(1); // do nothing and loop forever
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}
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166
trunk/Arduino/libraries/SID/examples/RandomPitch/RandomPitch.ino
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166
trunk/Arduino/libraries/SID/examples/RandomPitch/RandomPitch.ino
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@@ -0,0 +1,166 @@
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#include <SID.h>
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/************************************************************************
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Arduino controls an
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Atmega8 MOS6581 SID Emulator
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by softare serial line
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( SID = Sound Interface Device )
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random sound pitch example
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****************************************************************************
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date authors version comment
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====== ====================== ======= ==============================
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2007 (ch) Christoph Haberer V1.0 First implementation
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2012 Mario Patino V1.1 Adapted for Arduino SID Library
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Versions:
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V1.0
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- 2 channel random pitch
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V1.1
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- Adapted to work with the Arduino SID Library
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***************************************************************************/
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/***************************************************************************
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*
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* (c) 2007 Christoph Haberer, christoph(at)roboterclub-freiburg.de
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*
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***************************************************************************
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation version 2 of the License, *
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* If you extend the program please maintain the list of authors. *
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* If you want to use this software for commercial purposes and you *
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* don't want to make it open source, please contact the authors for *
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* licensing. *
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***************************************************************************/
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#define OFF 0
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#define SETTRIANGLE_1 4,0x11,5,0xBB,6,0xAA,
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#define C4_1 1,0x11,0,0x25,
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#define CONTROLREG 4 // SID control register address
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// waveforms
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#define SETNOISE_1 4,0x81,5,0xBB,6,0xAD, // SID register setup to create noise
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SID mySid;
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void setup() {
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digitalWrite(13, HIGH); //turn on debugging LED
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mySid.begin();
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}
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/************************************************************************
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void setwaveform_noise(uint8_t channel)
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Set sid registers to create a noise waveform.
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The SID has 3 channels, which should be accesed according to this
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definition:
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#define CHANNEL1 0
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#define CHANNEL2 7
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#define CHANNEL3 14
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For noise sounds it makes sense to use only one channel, because
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using multiple channels gives almost no audible difference.
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************************************************************************/
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void setwaveform_triangle(uint8_t channel)
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{
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uint8_t dataset[]={ SETTRIANGLE_1 C4_1 0xFF };
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// uint8_t dataset[]={SETNOISE_1 C4_1 0xFF};
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uint8_t n=0;
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while(dataset[n]!=0xFF)
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{
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mySid.set_register(channel+dataset[n], dataset[n+1]);
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// register address, register content
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n+=2;
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}
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}
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/************************************************************************
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void set_frequency(uint16_t pitch,uint8_t channel)
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Set sid frequncy registers.
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The pitch has to be:
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pitch=16.77*frequency
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The SID has 3 channels, which should be accesed according to this
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definition:
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#define CHANNEL1 0
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#define CHANNEL2 7
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#define CHANNEL3 14
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************************************************************************/
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// pitch=16.77*frequency
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void set_frequency(uint16_t pitch,uint8_t channel)
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{
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mySid.set_register(channel, pitch&0xFF); // low register adress
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mySid.set_register(channel+1, pitch>>8); // high register adress
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}
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uint8_t zufall()
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{
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static uint16_t startwert=0x0AA;
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uint16_t temp;
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uint8_t n;
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for(n=1;n<8;n++)
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{
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temp = startwert;
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startwert=startwert << 1;
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temp ^= startwert;
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if ( ( temp & 0x4000 ) == 0x4000 )
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{
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startwert |= 1;
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}
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}
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return (startwert);
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}
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#define CHANNEL1 0
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#define CHANNEL2 7
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#define CHANNEL3 14
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/************************************************************************
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main loop
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create space ship noise
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************************************************************************/
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void loop()
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{
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uint16_t n;
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uint8_t flag,k;
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uint16_t soundindex=0;
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setwaveform_triangle(CHANNEL1);
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setwaveform_triangle(CHANNEL2);
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while(1)
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{
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n=zufall()*8;
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set_frequency(n*17,CHANNEL1); // change noise generator frequency
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n=zufall()*2;
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set_frequency(n*17,CHANNEL2); // change noise generator frequency
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delay(100);
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}
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}
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