Difference between revisions of "Students/Ian Petrov"

Revision as of 02:09, 20 March 2010

I am a Visual Arts - Media major with an interest in graphic design. I was born in Europe, and moved to Canada when I was 5. I've lived in San Diego since I was 10, and graduated from University City High School before coming to UCSD as a transfer. I have been working with computers since grade school, and am highly interested in pursuing a career in the computer field. I have been in interested in electronics also since a young age and I think it will add an interesting dimension to my artistic career, and am eagerly looking forward to learning how to make art projects using them.

Portable Heater

Generator?

Air Conditioner

Cell Phone

Car Keys

Midterm Proposal

My proposal is a hat which contains a cooling fan enabled by a switch. The switch will hang down from the inside of the hat to about shoulder length, enabling the wearer to turn on and off the fan. This is a crude implementation of a warm weather cowboy hat which provides cooling apart from shade. It will be powered by a 9v battery, and connected by a normally open switch. In order to operate the fan, you must hold down the button.

Final Proposal

My final project will be called "Punch a Celebrity". It will consist of a punching pad with a picture of a celebrity on it. The pad will have an impact sensor attached to a arduino/breakout board, which is attached to a speaker. This will enable a wav or mp3 file to play at the moment of impact, and simulate that you are actually hitting a celebrity.

Code

<span style="color: #7E7E7E;">//Ian Petrov VIS147A Final</span>
<span style="color: #7E7E7E;">//code edited from Adafruit Wave Shield Site</span>
#include <FatReader.h>
#include <SdReader.h>
#include <avr/pgmspace.h>
#include <span style="color: #006699;">"WaveUtil.h"</span>
#include <span style="color: #006699;">"WaveHC.h"</span>


SdReader card;    <span style="color: #7E7E7E;">// This object holds the information for the card</span>
FatVolume vol;    <span style="color: #7E7E7E;">// This holds the information for the partition on the card</span>
FatReader root;   <span style="color: #7E7E7E;">// This holds the information for the filesystem on the card</span>
FatReader f;      <span style="color: #7E7E7E;">// This holds the information for the file we're play</span>

WaveHC wave;      <span style="color: #7E7E7E;">// This is the only wave (audio) object, since we will only play one at a time</span>

#define DEBOUNCE 100  <span style="color: #7E7E7E;">// button debouncer</span>

<span style="color: #7E7E7E;">// this handy function will return the number of bytes currently free in RAM, great for debugging!   </span>
<span style="color: #CC6600;">int</span> freeRam(<span style="color: #CC6600;">void</span>)
{
  extern <span style="color: #CC6600;">int</span>  __bss_end; 
  extern <span style="color: #CC6600;">int</span>  *__brkval; 
  <span style="color: #CC6600;">int</span> free_memory; 
  <span style="color: #CC6600;">if</span>((<span style="color: #CC6600;">int</span>)__brkval == 0) {
    free_memory = ((<span style="color: #CC6600;">int</span>)&free_memory) - ((<span style="color: #CC6600;">int</span>)&__bss_end); 
  }
  <span style="color: #CC6600;">else</span> {
    free_memory = ((<span style="color: #CC6600;">int</span>)&free_memory) - ((<span style="color: #CC6600;">int</span>)__brkval); 
  }
  <span style="color: #CC6600;">return</span> free_memory; 
} 

<span style="color: #CC6600;">void</span> sdErrorCheck(<span style="color: #CC6600;">void</span>)
{
  <span style="color: #CC6600;">if</span> (!card.errorCode()) <span style="color: #CC6600;">return</span>;
  putstring(<span style="color: #006699;">"\n\rSD I/O error: "</span>);
  <span style="color: #CC6600;"><b>Serial</b></span>.<span style="color: #CC6600;">print</span>(card.errorCode(), <span style="color: #006699;">HEX</span>);
  putstring(<span style="color: #006699;">", "</span>);
  <span style="color: #CC6600;"><b>Serial</b></span>.<span style="color: #CC6600;">println</span>(card.errorData(), <span style="color: #006699;">HEX</span>);
  <span style="color: #CC6600;">while</span>(1);
}

<span style="color: #CC6600;">void</span> <span style="color: #CC6600;"><b>setup</b></span>() {
  <span style="color: #7E7E7E;">// set up serial port</span>
  <span style="color: #CC6600;"><b>Serial</b></span>.<span style="color: #CC6600;">begin</span>(9600);
  putstring_nl(<span style="color: #006699;">"WaveHC with 6 buttons"</span>);
  
   putstring(<span style="color: #006699;">"Free RAM: "</span>);       <span style="color: #7E7E7E;">// This can help with debugging, running out of RAM is bad</span>
  <span style="color: #CC6600;"><b>Serial</b></span>.<span style="color: #CC6600;">println</span>(freeRam());      <span style="color: #7E7E7E;">// if this is under 150 bytes it may spell trouble!</span>
  
  <span style="color: #7E7E7E;">// Set the output pins for the DAC control. This pins are defined in the library</span>
  <span style="color: #CC6600;">pinMode</span>(2, <span style="color: #006699;">OUTPUT</span>);
  <span style="color: #CC6600;">pinMode</span>(3, <span style="color: #006699;">OUTPUT</span>);
  <span style="color: #CC6600;">pinMode</span>(4, <span style="color: #006699;">OUTPUT</span>);
  <span style="color: #CC6600;">pinMode</span>(5, <span style="color: #006699;">OUTPUT</span>);
 
  <span style="color: #7E7E7E;">// pin13 LED</span>
  <span style="color: #CC6600;">pinMode</span>(13, <span style="color: #006699;">OUTPUT</span>);
 
  <span style="color: #7E7E7E;">// enable pull-up resistors on switch pins (analog inputs)</span>
  <span style="color: #CC6600;">digitalWrite</span>(14, <span style="color: #006699;">HIGH</span>);
  <span style="color: #CC6600;">digitalWrite</span>(15, <span style="color: #006699;">HIGH</span>);
  <span style="color: #CC6600;">digitalWrite</span>(16, <span style="color: #006699;">HIGH</span>);
  <span style="color: #CC6600;">digitalWrite</span>(17, <span style="color: #006699;">HIGH</span>);
  <span style="color: #CC6600;">digitalWrite</span>(18, <span style="color: #006699;">HIGH</span>);
  <span style="color: #CC6600;">digitalWrite</span>(19, <span style="color: #006699;">HIGH</span>);
 
  <span style="color: #7E7E7E;">//  if (!card.init(true)) { //play with 4 MHz spi if 8MHz isn't working for you</span>
  <span style="color: #CC6600;">if</span> (!card.init()) {         <span style="color: #7E7E7E;">//play with 8 MHz spi (default faster!)  </span>
    putstring_nl(<span style="color: #006699;">"Card init. failed!"</span>);  <span style="color: #7E7E7E;">// Something went wrong, lets print out why</span>
    sdErrorCheck();
    <span style="color: #CC6600;">while</span>(1);                            <span style="color: #7E7E7E;">// then 'halt' - do nothing!</span>
  }
  
  <span style="color: #7E7E7E;">// enable optimize read - some cards may timeout. Disable if you're having problems</span>
  card.partialBlockRead(<span style="color: #CC6600;">true</span>);
 
<span style="color: #7E7E7E;">// Now we will look for a FAT partition!</span>
  uint8_t part;
  <span style="color: #CC6600;">for</span> (part = 0; part < 5; part++) {     <span style="color: #7E7E7E;">// we have up to 5 slots to look in</span>
    <span style="color: #CC6600;">if</span> (vol.init(card, part)) 
      <span style="color: #CC6600;">break</span>;                             <span style="color: #7E7E7E;">// we found one, lets bail</span>
  }
  <span style="color: #CC6600;">if</span> (part == 5) {                       <span style="color: #7E7E7E;">// if we ended up not finding one  :(</span>
    putstring_nl(<span style="color: #006699;">"No valid FAT partition!"</span>);
    sdErrorCheck();      <span style="color: #7E7E7E;">// Something went wrong, lets print out why</span>
    <span style="color: #CC6600;">while</span>(1);                            <span style="color: #7E7E7E;">// then 'halt' - do nothing!</span>
  }
  
  <span style="color: #7E7E7E;">// Lets tell the user about what we found</span>
  putstring(<span style="color: #006699;">"Using partition "</span>);
  <span style="color: #CC6600;"><b>Serial</b></span>.<span style="color: #CC6600;">print</span>(part, <span style="color: #006699;">DEC</span>);
  putstring(<span style="color: #006699;">", type is FAT"</span>);
  <span style="color: #CC6600;"><b>Serial</b></span>.<span style="color: #CC6600;">println</span>(vol.fatType(),<span style="color: #006699;">DEC</span>);     <span style="color: #7E7E7E;">// FAT16 or FAT32?</span>
  
  <span style="color: #7E7E7E;">// Try to open the root directory</span>
  <span style="color: #CC6600;">if</span> (!root.openRoot(vol)) {
    putstring_nl(<span style="color: #006699;">"Can't open root dir!"</span>); <span style="color: #7E7E7E;">// Something went wrong,</span>
    <span style="color: #CC6600;">while</span>(1);                             <span style="color: #7E7E7E;">// then 'halt' - do nothing!</span>
  }
  
  <span style="color: #7E7E7E;">// Whew! We got past the tough parts.</span>
  putstring_nl(<span style="color: #006699;">"Ready!"</span>);
}

<span style="color: #CC6600;">void</span> playcomplete(<span style="color: #CC6600;">char</span> good) {
  <span style="color: #7E7E7E;">// call our helper to find and play this name</span>
  playfile(<span style="color: #006699;">"GOOD.WAV"</span>);
  <span style="color: #CC6600;">while</span> (wave.isplaying) {
  <span style="color: #7E7E7E;">// do nothing while its playing</span>
  }
  <span style="color: #7E7E7E;">// now its done playing</span>
}


<span style="color: #CC6600;">void</span> <span style="color: #CC6600;"><b>loop</b></span>() {
  <span style="color: #7E7E7E;">//putstring(".");            // uncomment this to see if the loop isnt running  </span>
    
  <span style="color: #CC6600;">switch</span> (check_switches()) {     <span style="color: #7E7E7E;">//this is the loop which cycles the arnold sounds based</span>
    <span style="color: #CC6600;">case</span> 1:                       <span style="color: #7E7E7E;">//on which switch you connect to.</span>
      playcomplete(<span style="color: #006699;">"STOP.WAV"</span>);
      <span style="color: #CC6600;">break</span>;
    <span style="color: #CC6600;">case</span> 2:
      playcomplete(<span style="color: #006699;">"SOB.WAV"</span>);
      <span style="color: #CC6600;">break</span>;
    <span style="color: #CC6600;">case</span> 3:
      playcomplete(<span style="color: #006699;">"DONT.WAV"</span>);
      <span style="color: #CC6600;">break</span>;
    <span style="color: #CC6600;">case</span> 4:
      playcomplete(<span style="color: #006699;">"LACK.WAV"</span>);
      <span style="color: #CC6600;">break</span>;
    <span style="color: #CC6600;">case</span> 5:
      playcomplete(<span style="color: #006699;">"FIST.WAV"</span>);
  }
}

<span style="color: #CC6600;">byte</span> check_switches()
{
  <span style="color: #CC6600;">static</span> <span style="color: #CC6600;">byte</span> previous[6];
  <span style="color: #CC6600;">static</span> <span style="color: #CC6600;">long</span> time[6];
  <span style="color: #CC6600;">byte</span> reading;
  <span style="color: #CC6600;">byte</span> pressed;
  <span style="color: #CC6600;">byte</span> index;
  pressed = 0;

  <span style="color: #CC6600;">for</span> (<span style="color: #CC6600;">byte</span> index = 0; index < 6; ++index) {
    reading = <span style="color: #CC6600;">digitalRead</span>(14 + index);
    <span style="color: #CC6600;">if</span> (reading == <span style="color: #006699;">LOW</span> && previous[index] == <span style="color: #006699;">HIGH</span> && <span style="color: #CC6600;">millis</span>() - time[index] > DEBOUNCE)
    {
      <span style="color: #7E7E7E;">// switch pressed</span>
      time[index] = <span style="color: #CC6600;">millis</span>();
      pressed = index + 1;
      <span style="color: #CC6600;">break</span>;
    }
    previous[index] = reading;
  }
  <span style="color: #7E7E7E;">// return switch number (1 - 6)</span>
  <span style="color: #CC6600;">return</span> (pressed);
}


<span style="color: #7E7E7E;">// Plays a full file from beginning to end with no pause.</span>
<span style="color: #CC6600;">void</span> playcomplete(<span style="color: #CC6600;">char</span> *name) {
  <span style="color: #7E7E7E;">// call our helper to find and play this name</span>
  playfile(name);
  <span style="color: #CC6600;">while</span> (wave.isplaying) {
  <span style="color: #7E7E7E;">// do nothing while its playing</span>
  }
  <span style="color: #7E7E7E;">// now its done playing</span>
}

<span style="color: #CC6600;">void</span> playfile(<span style="color: #CC6600;">char</span> *name) {
  <span style="color: #7E7E7E;">// see if the wave object is currently doing something</span>
  <span style="color: #CC6600;">if</span> (wave.isplaying) {<span style="color: #7E7E7E;">// already playing something, so stop it!</span>
    wave.<span style="color: #CC6600;">stop</span>(); <span style="color: #7E7E7E;">// stop it</span>
  }
  <span style="color: #7E7E7E;">// look in the root directory and open the file</span>
  <span style="color: #CC6600;">if</span> (!f.open(root, name)) {
    putstring(<span style="color: #006699;">"Couldn't open file "</span>); <span style="color: #CC6600;"><b>Serial</b></span>.<span style="color: #CC6600;">print</span>(name); <span style="color: #CC6600;">return</span>;
  }
  <span style="color: #7E7E7E;">// OK read the file and turn it into a wave object</span>
  <span style="color: #CC6600;">if</span> (!wave.create(f)) {
    putstring_nl(<span style="color: #006699;">"Not a valid WAV"</span>); <span style="color: #CC6600;">return</span>;
  }
  
  <span style="color: #7E7E7E;">// ok time to play! start playback</span>
  wave.play();
}