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Topic: Replace Buttons with LDR's (Read 402 times) previous topic - next topic

samersh

Dec 20, 2012, 08:01 pm Last Edit: Dec 20, 2012, 09:45 pm by samersh Reason: 1
anybody can help me to convert this code Inputs from Buttons to LDR's Analog Inputs:

this code is related to the Wave shield:

Now i found this code ... and i think its great because it allows other buttons to interrupt the previous process so for now i will give you the code to help me with it .. because its made for buttons and not for analog input

Code:
Code: [Select]

#include <FatReader.h>
#include <SdReader.h>
#include <avr/pgmspace.h>
#include "WaveUtil.h"
#include "WaveHC.h"


SdReader card;    // This object holds the information for the card
FatVolume vol;    // This holds the information for the partition on the card
FatReader root;   // This holds the information for the filesystem on the card
FatReader f;      // This holds the information for the file we're play

WaveHC wave;      // This is the only wave (audio) object, since we will only play one at a time

#define DEBOUNCE 5  // button debouncer

// here is where we define the buttons that we'll use. button "1" is the first, button "6" is the 6th, etc
byte buttons[] = {14, 15, 16, 17, 18, 19};
// This handy macro lets us determine how big the array up above is, by checking the size
#define NUMBUTTONS sizeof(buttons)
// we will track if a button is just pressed, just released, or 'pressed' (the current state
volatile byte pressed[NUMBUTTONS], justpressed[NUMBUTTONS], justreleased[NUMBUTTONS];

// this handy function will return the number of bytes currently free in RAM, great for debugging!   
int freeRam(void)
{
extern int  __bss_end;
extern int  *__brkval;
int free_memory;
if((int)__brkval == 0) {
   free_memory = ((int)&free_memory) - ((int)&__bss_end);
}
else {
   free_memory = ((int)&free_memory) - ((int)__brkval);
}
return free_memory;
}

void sdErrorCheck(void)
{
if (!card.errorCode()) return;
putstring("\n\rSD I/O error: ");
Serial.print(card.errorCode(), HEX);
putstring(", ");
Serial.println(card.errorData(), HEX);
while(1);
}

void setup() {
byte i;

// set up serial port
Serial.begin(9600);
putstring_nl("WaveHC with ");
Serial.print(NUMBUTTONS, DEC);
putstring_nl("buttons");

putstring("Free RAM: ");       // This can help with debugging, running out of RAM is bad
Serial.println(freeRam());      // if this is under 150 bytes it may spell trouble!

// Set the output pins for the DAC control. This pins are defined in the library
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);

// pin13 LED
pinMode(13, OUTPUT);

// Make input & enable pull-up resistors on switch pins
for (i=0; i< NUMBUTTONS; i++) {
   pinMode(buttons, INPUT);
   digitalWrite(buttons, HIGH);
}

//  if (!card.init(true)) { //play with 4 MHz spi if 8MHz isn't working for you
if (!card.init()) {         //play with 8 MHz spi (default faster!)
   putstring_nl("Card init. failed!");  // Something went wrong, lets print out why
   sdErrorCheck();
   while(1);                            // then 'halt' - do nothing!
}

// enable optimize read - some cards may timeout. Disable if you're having problems
card.partialBlockRead(true);

// Now we will look for a FAT partition!
uint8_t part;
for (part = 0; part < 5; part++) {     // we have up to 5 slots to look in
   if (vol.init(card, part))
     break;                             // we found one, lets bail
}
if (part == 5) {                       // if we ended up not finding one  smiley-sad
   putstring_nl("No valid FAT partition!");
   sdErrorCheck();      // Something went wrong, lets print out why
   while(1);                            // then 'halt' - do nothing!
}

// Lets tell the user about what we found
putstring("Using partition ");
Serial.print(part, DEC);
putstring(", type is FAT");
Serial.println(vol.fatType(),DEC);     // FAT16 or FAT32?

// Try to open the root directory
if (!root.openRoot(vol)) {
   putstring_nl("Can't open root dir!"); // Something went wrong,
   while(1);                             // then 'halt' - do nothing!
}

// Whew! We got past the tough parts.
putstring_nl("Ready!");

TCCR2A = 0;
TCCR2B = 1<<CS22 | 1<<CS21 | 1<<CS20;

//Timer2 Overflow Interrupt Enable
TIMSK2 |= 1<<TOIE2;


}

SIGNAL(TIMER2_OVF_vect) {
check_switches();
}

void check_switches()
{
static byte previousstate[NUMBUTTONS];
static byte currentstate[NUMBUTTONS];
byte index;

for (index = 0; index < NUMBUTTONS; index++) {
   currentstate[index] = digitalRead(buttons[index]);   // read the button

   /*     
   Serial.print(index, DEC);
   Serial.print(": cstate=");
   Serial.print(currentstate[index], DEC);
   Serial.print(", pstate=");
   Serial.print(previousstate[index], DEC);
   Serial.print(", press=");
   */

   if (currentstate[index] == previousstate[index]) {
     if ((pressed[index] == LOW) && (currentstate[index] == LOW)) {
         // just pressed
         justpressed[index] = 1;
     }
     else if ((pressed[index] == HIGH) && (currentstate[index] == HIGH)) {
         // just released
         justreleased[index] = 1;
     }
     pressed[index] = !currentstate[index];  // remember, digital HIGH means NOT pressed
   }
   //Serial.println(pressed[index], DEC);
   previousstate[index] = currentstate[index];   // keep a running tally of the buttons
}
}


void loop() {
byte i;
static byte playing = -1;

if (pressed[0]) {
   if (playing != 0) {
     playing = 0;
     playfile("DO.WAV");
   }
}
else if (pressed[1]) {
   if (playing != 1) {
     playing = 1;
     playfile("RE.WAV");
   }
}
else if (pressed[2]) {
   if (playing != 2) {
     playing = 2;
     playfile("MI.WAV");
   }
}
else if (pressed[3]) {
   if (playing != 3) {
     playing = 3;
     playfile("FA.WAV");
   }
}
else if (pressed[4]) {
   if (playing != 4) {
     playing = 4;
     playfile("SO.WAV");
   }
}
else if (pressed[5]) {
   if (playing != 5) {
     playing = 5;
     playfile("LA.WAV");
   }
}

if (! wave.isplaying) {
   playing = -1;
}
}



// Plays a full file from beginning to end with no pause.
void playcomplete(char *name) {
// call our helper to find and play this name
playfile(name);
while (wave.isplaying) {
// do nothing while its playing
}
// now its done playing
}

void playfile(char *name) {
// see if the wave object is currently doing something
if (wave.isplaying) {// already playing something, so stop it!
   wave.stop(); // stop it
}
// look in the root directory and open the file
if (!f.open(root, name)) {
   putstring("Couldn't open file "); Serial.print(name); return;
}
// OK read the file and turn it into a wave object
if (!wave.create(f)) {
   putstring_nl("Not a valid WAV"); return;
}

// ok time to play! start playback
wave.play();
}




THANKS
   

robtillaart

please use code tags, it is the # button above the smileys . modify your post, select the code and press # button. thank you.


buttons are 1 or zero, LDR's typically have a range between 0 .. max where max <= 1024.

you must map the analogReads to a 0 1 state to simulate the buttons. Therefor you need to define some threshold. Above = 1 beneath = 0.

Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

AWOL

Identical post in Audio deleted.
OP, do NOT crosspost., it wastes time and makes me CROSS.
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.
I speak for myself, not Arduino.

marco_c

Can't test this as I have not got your libraries, but this the changes are implemented:

Code: [Select]
#include <FatReader.h>
#include <SdReader.h>
#include <avr/pgmspace.h>
#include "WaveUtil.h"
#include "WaveHC.h"


SdReader card;    // This object holds the information for the card
FatVolume vol;    // This holds the information for the partition on the card
FatReader root;   // This holds the information for the filesystem on the card
FatReader f;      // This holds the information for the file we're play

WaveHC wave;      // This is the only wave (audio) object, since we will only play one at a time

#define DEBOUNCE 5  // button debouncer

// here is where we define the buttons that we'll use. button "1" is the first, button "6" is the 6th, etc
/// --- byte buttons[] = {14, 15, 16, 17, 18, 19};
byte buttons[] = {A0, A1, A2, A3, A4, A5};

// This handy macro lets us determine how big the array up above is, by checking the size
#define NUMBUTTONS sizeof(buttons)/sizeof(buttons[0])
#define ON_THRESHOLD 512  // change to suit values retruned from LDR. Values greater will be ON

// we will track if a button is just pressed, just released, or 'pressed' (the current state
volatile byte pressed[NUMBUTTONS], justpressed[NUMBUTTONS], justreleased[NUMBUTTONS];

// this handy function will return the number of bytes currently free in RAM, great for debugging!   
int freeRam(void)
{
extern int  __bss_end;
extern int  *__brkval;
int free_memory;
if((int)__brkval == 0) {
   free_memory = ((int)&free_memory) - ((int)&__bss_end);
}
else {
   free_memory = ((int)&free_memory) - ((int)__brkval);
}
return free_memory;
}

void sdErrorCheck(void)
{
if (!card.errorCode()) return;
putstring("\n\rSD I/O error: ");
Serial.print(card.errorCode(), HEX);
putstring(", ");
Serial.println(card.errorData(), HEX);
while(1);
}

void setup() {
byte i;

// set up serial port
Serial.begin(9600);
putstring_nl("WaveHC with ");
Serial.print(NUMBUTTONS, DEC);
putstring_nl("buttons");

putstring("Free RAM: ");       // This can help with debugging, running out of RAM is bad
Serial.println(freeRam());      // if this is under 150 bytes it may spell trouble!

// Set the output pins for the DAC control. This pins are defined in the library
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);

// pin13 LED
pinMode(13, OUTPUT);

// Make input & enable pull-up resistors on switch pins
for (i=0; i< NUMBUTTONS; i++) {
   pinMode(buttons, INPUT);
   digitalWrite(buttons, HIGH);
}

//  if (!card.init(true)) { //play with 4 MHz spi if 8MHz isn't working for you
if (!card.init()) {         //play with 8 MHz spi (default faster!)
   putstring_nl("Card init. failed!");  // Something went wrong, lets print out why
   sdErrorCheck();
   while(1);                            // then 'halt' - do nothing!
}

// enable optimize read - some cards may timeout. Disable if you're having problems
card.partialBlockRead(true);

// Now we will look for a FAT partition!
uint8_t part;
for (part = 0; part < 5; part++) {     // we have up to 5 slots to look in
   if (vol.init(card, part))
     break;                             // we found one, lets bail
}
if (part == 5) {                       // if we ended up not finding one  smiley-sad
   putstring_nl("No valid FAT partition!");
   sdErrorCheck();      // Something went wrong, lets print out why
   while(1);                            // then 'halt' - do nothing!
}

// Lets tell the user about what we found
putstring("Using partition ");
Serial.print(part, DEC);
putstring(", type is FAT");
Serial.println(vol.fatType(),DEC);     // FAT16 or FAT32?

// Try to open the root directory
if (!root.openRoot(vol)) {
   putstring_nl("Can't open root dir!"); // Something went wrong,
   while(1);                             // then 'halt' - do nothing!
}

// Whew! We got past the tough parts.
putstring_nl("Ready!");

TCCR2A = 0;
TCCR2B = 1<<CS22 | 1<<CS21 | 1<<CS20;

//Timer2 Overflow Interrupt Enable
TIMSK2 |= 1<<TOIE2;


}

SIGNAL(TIMER2_OVF_vect) {
check_switches();
}

void check_switches()
{
static byte previousstate[NUMBUTTONS];
static byte currentstate[NUMBUTTONS];
byte index;

for (index = 0; index < NUMBUTTONS; index++) {
   currentstate[index] = analogRead(buttons[index]) >= ON_THRESHOLD;   // read the LDR 'button'

   /*     
   Serial.print(index, DEC);
   Serial.print(": cstate=");
   Serial.print(currentstate[index], DEC);
   Serial.print(", pstate=");
   Serial.print(previousstate[index], DEC);
   Serial.print(", press=");
   */

   if (currentstate[index] == previousstate[index]) {
     if ((pressed[index] == LOW) && (currentstate[index] == LOW)) {
         // just pressed
         justpressed[index] = 1;
     }
     else if ((pressed[index] == HIGH) && (currentstate[index] == HIGH)) {
         // just released
         justreleased[index] = 1;
     }
     pressed[index] = !currentstate[index];  // remember, digital HIGH means NOT pressed
   }
   //Serial.println(pressed[index], DEC);
   previousstate[index] = currentstate[index];   // keep a running tally of the buttons
}
}


void loop() {
byte i;
static byte playing = -1;

if (pressed[0]) {
   if (playing != 0) {
     playing = 0;
     playfile("DO.WAV");
   }
}
else if (pressed[1]) {
   if (playing != 1) {
     playing = 1;
     playfile("RE.WAV");
   }
}
else if (pressed[2]) {
   if (playing != 2) {
     playing = 2;
     playfile("MI.WAV");
   }
}
else if (pressed[3]) {
   if (playing != 3) {
     playing = 3;
     playfile("FA.WAV");
   }
}
else if (pressed[4]) {
   if (playing != 4) {
     playing = 4;
     playfile("SO.WAV");
   }
}
else if (pressed[5]) {
   if (playing != 5) {
     playing = 5;
     playfile("LA.WAV");
   }
}

if (! wave.isplaying) {
   playing = -1;
}
}



// Plays a full file from beginning to end with no pause.
void playcomplete(char *name) {
// call our helper to find and play this name
playfile(name);
while (wave.isplaying) {
// do nothing while its playing
}
// now its done playing
}

void playfile(char *name) {
// see if the wave object is currently doing something
if (wave.isplaying) {// already playing something, so stop it!
   wave.stop(); // stop it
}
// look in the root directory and open the file
if (!f.open(root, name)) {
   putstring("Couldn't open file "); Serial.print(name); return;
}
// OK read the file and turn it into a wave object
if (!wave.create(f)) {
   putstring_nl("Not a valid WAV"); return;
}

// ok time to play! start playback
wave.play();
}

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