Clapping music with Arduino
This exercise relies on the following topics in C:
- variable types (int, char)
- character arrays (strings)
- loops
- nested loops
Hello world.c
Arduino is C!
#include <stdio.h>
main ()
{
printf("hello world\n");
}
Blink music
void setup() {
pinMode(8, OUTPUT);
for (int i=0; i<1000; i++) {
digitalWrite(8, HIGH);
delay(1);
digitalWrite(8, LOW);
delay(1);
}
}
void loop () {}
change the argument to the delay...
for my refined control, try delayMicroseconds
void setup() {
int x;
// initialize the digital pin as an output:
pinMode(8, OUTPUT);
for (int i=0; i<1000; i++) {
digitalWrite(8, HIGH);
delayMicroseconds(250);
digitalWrite(8, LOW);
delayMicroseconds(250);
}
}
tone
- http://www.arduino.cc/en/Tutorial/Tone
- Starting point is the Example > Digital > toneMelody
void setup() {
tone(8, 500, 100);
delay(100);
tone(8, 600, 100);
delay(100);
tone(8, 700, 100);
delay(100);
tone(8, 800, 100);
delay(100);
tone(8, 900, 100);
delay(100);
}
void loop() {}
Clapping music.c
Now, using a C string with the Clapping music pattern.
char pat[] = "xxx xx x xx ";
void setup() {
int patlen = strlen(pat);
for (int p=0; p<patlen; p++) {
if (pat[p] == 'x') {
tone(8, 500, 10);
}
delay(100);
}
}
void loop () {}
//pattern
String pat = "XXX XX X XX ";
void setup() {
}
void loop() {
//get the length of the pattern
int patlen = pat.length();
//loop
for (int p=0; p<patlen; p++) {
//if there's a X, play
if(pat.charAt(p) == 'X'){
tone(13, 800, 10);
}
delay(150);
}
}
Tone only technically supports playing one tone at a time; how might it be possible to still produce something like the 2 parts necessary for clapping music.