Jonah's Drum Machine
The Drum Machine is a program written by Jonah Marrs.
The assignment here was to add commands to an existing sound sequencer in the arduino serial monitor. I tried to draw shapes using nested loops, these shapes are combining in the serial monitor, as shown in the videos below, creating new partterns of sound everytyme a command is sent.
Commands added to the Drum Machine
The Sketches for each command are indexed below this table.
| Command | Shape | Command | Shape | Command | Shape |
|---|---|---|---|---|---|
| a |  |
b |  |
c |  |
| d |  |
e |  |
f |  |
| g |  |
h |  |
j |  |
| k |  |
s |  |
Sketch for each command
a ~~~ case 'a':
for (int i = 0; i < 10; i++){
for (int j = 0; j < 20; j++) { array[i][j] = '+';
//else {
//array[i][j] = '-';
// }
}
}
break;
- b
case 'b':
for (int i = 0; i < 10; i++)
{
for (int j = i; j < 20; j++)
{
array[i][j] = '+';
//else {
//array[i][j] = '-';
// }
}
}
break;
- c
case 'c':
for (int i = 2; i < 7; i++)
{
for (int j = i; j < 17; j++)
{
array[i][j] = '+';
if (i%2 == 0 && j%3 == 0)
{
array[i][j] = '-';
}
}
}
break;
- d
case 'd':
for (int i = 0; i < 10; i++)
{
for (int j = i; j < 20; j++)
{
array[i][j] = '+';
if (i%2 == 0 && j%3 == 0)
{
array[i][j] = '-';
}
}
}
break;
- e
case 'e':
for (int i = 2; i < 7; i++)
{
for (int j = i; j < 17; j++)
{
array[i][j] = '+';
//else {
//array[i][j] = '-';
// }
}
}
break;
- f
case 'f':
for (int i = 1; i < 8; i++)
{
for (int j = 7; j >= i; j--)
{
array[i][j] = '+';
}
}
break;
- g
case 'g':
for (int i = 0; i <= 8; i++)
{
for (int j = 0; j < i; j++)
{
array[i][j] = '+';
}
}
break;
- h
case 'h':
for (int i = 1; i <= 8; i++)
{
for (int j = 0; j <=(2 * i - 1); j++)
{
array[i][j] = '+';
}
}
break;
- j
case 'j':
for (int i = 1; i <= 8; i++)
{
for (int j = 0; j <=(2 * i - 1); j++)
{
array[i][j] = '+';
if (i%3 == 0 && j%3 == 0)
{
array[i][j] = '-';
}
}
}
break;
- k
case 'k':
for (int i = 0; i < 10; i++)
{
for (int j = 0; j < 20; j++)
{
array[i][j] = '-';
}
}
break;
- s
case 's':
for (int i = 3; i < 7; i++)
{
for (int j = 4; j < 13; j++)
{
array[i][j] = '+';
//else {
//array[i][j] = '-';
// }
}
}
break;
#### The Drum Machine Code
/*
soundBox
A visual and interactive sound sequencer in the Arduino Serial Monitor
*/
char array [10][20]; // our screen
void setup() { Serial.begin(115200); // fastest possible Serial Speed in order to "render" our screen quickly pinMode(8, OUTPUT); // piezo pin
Serial.println();
Serial.println();
Serial.println();
Serial.println();
Serial.println();
Serial.println();
Serial.println();
Serial.println(" ~ Welcome to soundBox ~");
Serial.println("available commands: i, r, t "); // Serial print list of available commands for user
Serial.println();
Serial.println();
Serial.println();
delay(3000);
int rows = 10; int columns = 20;
//FILL THE ARRAY WITH DASHES
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < columns; j++)
{
array[i][j] = '-';
Serial.print(array[i][j]);
}
Serial.println();
}
Serial.println();
Serial.println();
refresh(array);
print(array);
}
void loop() { listen(array); Serial.println(); Serial.println(); refresh(array); print(array);
//indices(array); }
void refresh(char array[10][20]){
int columns = 20;
int rows = 10;
int xCounter = 0;
//CHECKS TO SEE IF WE NEED TO PLAY ANY SOUNDS, I.E. IF ANY '+' IN THE COLUMN TO THE RIGHT for(int i=0;i<rows;i++){
if(array[i][19] == '+')
{
xCounter++; //increment x counter
}
}
//BASED ON HOW MANY '+'S WE FOUND IN THE FINAL LINE, PLAY DIFFERENT SOUNDS
//MAKE THIS PLAY A SAMPLE INSTEAD OF NOTES?
switch (xCounter) {
case 1:
//do something when var equals 1
tone(8, 100, 100);
delay(100);
break;
case 2:
//do something when var equals 2
tone(8, 200, 100);
delay(100);
break;
case 3:
//do something when var equals 3
tone(8, 300, 100);
delay(100);
break;
case 4:
//do something when var equals 4
tone(8, 400 , 100);
delay(100);
break;
case 5:
//do something when var equals 5
tone(8, 500, 100);
delay(100);
break;
case 6:
//do something when var equals 6
tone(8, 600, 100);
delay(100);
break;
case 7:
//do something when var equals 7
tone(8, 700, 100);
delay(100);
break;
case 8:
//do something when var equals 8
tone(8, 800, 100);
delay(100);
break;
case 9:
//do something when var equals 9
tone(8, 900, 100);
delay(100);
break;
case 10:
//do something when var equals 10
tone(8, 1000, 100);
delay(100);
break;
default:
// if nothing else matches, do the default
noTone(8);
delay(100);
break;
}
xCounter = 0; // reset the counter
/*
//LOOPS THE LINES AROUND SHIFTING TO THE LEFT for(int j=0;j<rows;j++){ int temp = array[j][0] ; for(int i=0;i<columns;i++){ array[j][i]=array[j][i+1]; } array[j][19] = temp ; } }
*/
//LOOPS THE LINES AROUND SHIFTING TO THE RIGHT
for(int j=0;j
void listen(char array[10][20]){
int columns = 20; int rows = 10;
int incomingByte = 0; // for incoming serial data
if (Serial.available() > 0) { // read the incoming byte: incomingByte = Serial.read(); }
//Here are the functions that modify the array:
switch (incomingByte) { case 'r':
//print a pattern when var equals 'r'
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < columns; j++)
{
array[i][j] = '+';
if (i%2 == 0 && j%3 == 0)
{
array[i][j] = '-';
}
}
}
break;
case 'i':
//invert the array when var equals i
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < columns; j++)
{
if (array[i][j] == '+') {
array[i][j] = '-';
}
else{
array[i][j] = '+';
}
}
}
break;
//draw a big '+' when var equals t
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 't':
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < columns; j++)
{
if (i == 4 || j==10) {
array[i][j] = '+';
}
else {
array[i][j] = '-';
}
}
}
break;
//draw a square when var equals s
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 's':
for (int i = 3; i < 7; i++)
{
for (int j = 4; j < 13; j++)
{
array[i][j] = '+';
//else {
//array[i][j] = '-';
// }
}
}
break;
//draw a big square when var equals a
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 'a':
for (int i = 0; i < 10; i++)
{
for (int j = 0; j < 20; j++)
{
array[i][j] = '+';
//else {
//array[i][j] = '-';
// }
}
}
break;
//draw an inverted triangle when var equals b
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 'b':
for (int i = 0; i < 10; i++)
{
for (int j = i; j < 20; j++)
{
array[i][j] = '+';
//else {
//array[i][j] = '-';
// }
}
}
break;
//draw a trapeze with pattern when var equals c
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 'c':
for (int i = 2; i < 7; i++)
{
for (int j = i; j < 17; j++)
{
array[i][j] = '+';
if (i%2 == 0 && j%3 == 0)
{
array[i][j] = '-';
}
}
}
break;
//draw an inverted triangle with pattern when var equals d
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 'd':
for (int i = 0; i < 10; i++)
{
for (int j = i; j < 20; j++)
{
array[i][j] = '+';
if (i%2 == 0 && j%3 == 0)
{
array[i][j] = '-';
}
}
}
break;
//draw a trapeze when var equals e
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 'e':
for (int i = 2; i < 7; i++)
{
for (int j = i; j < 17; j++)
{
array[i][j] = '+';
//else {
//array[i][j] = '-';
// }
}
}
break;
//draw a triangle bottom orientation when var equals f
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 'f':
for (int i = 1; i < 8; i++)
{
for (int j = 7; j >= i; j--)
{
array[i][j] = '+';
}
}
break;
//draw a triangle top orientation when var equals g
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 'g':
for (int i = 0; i <= 8; i++)
{
for (int j = 0; j < i; j++)
{
array[i][j] = '+';
}
}
break;
//draw a rectangular triangle when var equals h
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 'h':
for (int i = 1; i <= 8; i++)
{
for (int j = 0; j <=(2 * i - 1); j++)
{
array[i][j] = '+';
}
}
break;
//draw a large triangle with pattern when var equals j
//available commands: a, b, c, d, e, f, g, h, i, j, r, t, s
case 'j':
for (int i = 1; i <= 8; i++)
{
for (int j = 0; j <=(2 * i - 1); j++)
{
array[i][j] = '+';
if (i%3 == 0 && j%3 == 0)
{
array[i][j] = '-';
}
}
}
break;
default:
// if nothing else matches, do the default
// default is optional
break;
}
}
void print(char array[10][20]){
int rows = 10; int columns = 20;
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < columns; j++)
{
Serial.print(array[i][j]);
}
Serial.println();
} }
// a debugging tool just to get your head around how the cells in our array are numbered // 0,0 is in the top lefthand corner and 9,19 is in the bottom right void indices(char array[10][20]){
int rows = 10; int columns = 20;
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < columns; j++)
{
Serial.print(i);
Serial.print(' ');
Serial.print(j);
Serial.print(',');
}
Serial.println();
}
}
~~~