Problem with reading a byte from the serial port

Integration and Hardware

pipporisso

Problem with reading a byte from the serial port

in Integration and Hardware • 4 months ago

Hi guys.

I've tried several solutions for this problem but I can't reach my target.

I'm creating an electronic drum with Arduino.

The code in Arduino works well so I haven't problems in it.

Then I transmit the byte I've assembled in a program written in Processing (from the serial port) but there is something wrong.

Sometimes Processing gives me some errors or it works but in the wrong way.

I've got some problems with reading the byte from Arduino and discompose it in a string of 8 bit.

This is my code in Processing with some extra information because I tried other solutions in the same code:

import processing.serial.*;
import ddf.minim.*;
PImage img;
Minim minim;
AudioSnippet snare,hiHat,tomH,tomM,floorT,crash;
String SPORT = Serial.list()[1];
Serial port;
boolean limit=false;
int PADres;
int hwe=10;
int[] v = new int[7];
/*int v[2]={1,2};
int i=1;*/
void setup(){
for(int i=0;i<7;i++) {
v[i]=0;
}
port = new Serial(this, SPORT, 9600);
port.bufferUntil('\n');
size(600, 600);
img = loadImage("drum.jpg");
background(img);
minim = new Minim(this);
/*if(port.available()>0){
snare = minim.loadSnippet("kit"+v[i]+"/snare.wav");*/
snare = minim.loadSnippet("kit1/1snare.wav");
tomH = minim.loadSnippet("kit1/2tomhigh.wav");
tomM = minim.loadSnippet("kit1/3tommed.wav");
floorT = minim.loadSnippet("kit1/4floortom.wav");
hiHat = minim.loadSnippet("kit1/5hihat.wav");
crash = minim.loadSnippet("kit1/6crash.wav");
}
/*void draw(){
serialEvent(port);
}
void serialEvent (Serial miaporta) {
String PADres = port.readStringUntil('\n');
if (PADres != null) {
PADres = trim(PADres);
float inByte = float(PADres);
byte dati = byte(inByte);
for(int i=0;i<7;i++) {
converti(dati);
}
if (port.available() > 0){
//byte(PADres);
//dati=PADres;
//PADres=PADres>>2;
if(v[0]==1){//if((dati&00000001)==1){
stroke(0);
ellipseMode(CENTER);
ellipse(250,280,hwe,hwe);
snare.play();
snare.rewind();
}else if(v[0]==0){
stroke(1);
ellipseMode(CENTER);
ellipse(250,280,hwe,hwe);
}
if(v[1]==1){//if((dati&00000010)==2){
stroke(0);
ellipseMode(CENTER);
ellipse(284,213,hwe,hwe);
tomH.play();
tomH.rewind();
}else{
stroke(1);
ellipseMode(CENTER);
ellipse(284,213,hwe,hwe);
}
if(v[2]==1){//if((dati&00000100)==4){
stroke(0);
ellipseMode(CENTER);
ellipse(370,210,5,5);
tomM.play();
tomM.rewind();
}else{
stroke(1);
ellipseMode(CENTER);
ellipse(370,210,hwe,hwe);
}
if(v[3]==1){//if((dati&00001000)==8){
stroke(0);
ellipseMode(CENTER);
ellipse(410,285,hwe,hwe);
floorT.play();
floorT.rewind();
}else{
stroke(1);
ellipseMode(CENTER);
ellipse(410,285,hwe,hwe);
}
if(v[4]==1){//if((dati&00010000)==16){
stroke(0);
ellipseMode(CENTER);
ellipse(150,200,hwe,hwe);
hiHat.play();
hiHat.rewind();
}else{
stroke(1);
ellipseMode(CENTER);
ellipse(150,200,hwe,hwe);
}
if(v[5]==1){//if((dati&00100000)==32){
stroke(0);
ellipseMode(CENTER);
ellipse(215,105,hwe,hwe);
crash.play();
crash.rewind();
}else{
stroke(1);
ellipseMode(CENTER);
ellipse(215,105,hwe,hwe);
}
}
}
}*/
void draw(){
//int dati=PADres;
//PADres[0]=0;
//println(Serial.list());
if (port.available() > 0){
for(int i=0;i<7;i++) {
v[i]=0;
}
PADres=port.read();
for(int i=0;i<7;i++) {
converti(PADres);
}
//byte(PADres);
//dati=PADres;
//PADres=PADres>>2;
if(v[0]==1){//if((PADres&00000001)==1){
stroke(0);
ellipseMode(CENTER);
ellipse(250,280,hwe,hwe);
snare.play();
snare.rewind();
}else if(v[0]==0){
stroke(1);
ellipseMode(CENTER);
ellipse(250,280,hwe,hwe);
}
if(v[1]==1){//if((PADres&00000010)==2){
stroke(0);
ellipseMode(CENTER);
ellipse(284,213,hwe,hwe);
tomH.play();
tomH.rewind();
}else if(v[1]==0){
stroke(1);
ellipseMode(CENTER);
ellipse(284,213,hwe,hwe);
}
if(v[2]==1){//if((PADres&00000100)==4){
stroke(0);
ellipseMode(CENTER);
ellipse(370,210,5,5);
tomM.play();
tomM.rewind();
}else if(v[2]==0){
stroke(1);
ellipseMode(CENTER);
ellipse(370,210,hwe,hwe);
}
if(v[3]==1){//if((PADres&00001000)==8){
stroke(0);
ellipseMode(CENTER);
ellipse(410,285,hwe,hwe);
floorT.play();
floorT.rewind();
}else if(v[3]==0){
stroke(1);
ellipseMode(CENTER);
ellipse(410,285,hwe,hwe);
}
if(v[4]==1){//if((PADres&00010000)==16){
stroke(0);
ellipseMode(CENTER);
ellipse(150,200,hwe,hwe);
hiHat.play();
hiHat.rewind();
}else if(v[4]==0){
stroke(1);
ellipseMode(CENTER);
ellipse(150,200,hwe,hwe);
}
if(v[5]==1){//if((PADres&00100000)==32){
stroke(0);
ellipseMode(CENTER);
ellipse(215,105,hwe,hwe);
crash.play();
crash.rewind();
}else if(v[5]==0){
stroke(1);
ellipseMode(CENTER);
ellipse(215,105,hwe,hwe);
}
}
}
void stop(){
snare.close();
hiHat.close();
tomH.close();
tomM.close();
floorT.close();
crash.close();
minim.stop();
super.stop();
}
void converti(int n){
int z=n;
for(int i=0;i<7 && z!=0;i++){
v[i]=z%2;
z=z/2;
}
}

I'm going to marry the person who solve my problem... Please :(

Replies(2)

PhiLho

Re: Problem with reading a byte from the serial port

4 months ago

" Processing gives me some errors"
What errors, exactly?
" it works but in the wrong way"
What do you mean by that?

We don't have your hardware, so it is hard to diagnose your problem, unless somebody familiar with the Serial library spots an obvious error.

pipporisso

Re: Re: Problem with reading a byte from the serial port

4 months ago

The errors aren't important because I fixed them...

When I run the program it plays all the audio files simultaneously 10 times per second.

Looking at the code I can understand that into the array are stored only "1" so it plays all the files together. This is the problem..

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