Arduino-Joystick2Csound1g-fm1-port (version with smoothing)
- Push Joystick button to turn on note
- Use JoystickX to offset and control the modulation index of
the foscil opcode from 0-40 via the scale opcode
- Use JoystickY to offset and control the Frequency of the foscil
opcode up/down two octaves via the scale opcode
<CsoundSynthesizer>
<CsInstruments>
sr = 44100
ksmps = 441
nchnls = 2
0dbfs = 1
Port@global:i = init(0)
// NOTE: change USB port "/dev/cu.usbmodem1414301" to correspond
// with USB port used by Arduino on your system
Port = arduinostart("//dev/ttyACM0", 9600) // for GNULinux
instr 1
Y:k = arduinoread(Port, 1) ; Joystick Y
X:k = arduinoread(Port, 2) ; Joystick X
SW:k = arduinoread(Port, 3) ; Joystick Button/Switch
Amp:k = init(0)
Freq:k = init(0)
Indx:k = init(1)
Xraw:k = X
X = port(Xraw, 0.02) // smoothed kY stream
Yraw:k = Y
Y = port(Yraw, 0.02) // smoothed kY stream
Yscaled:k = scale(Y, 400, 100, 1023, 0) ; scaling the raw sensor
; data to a user-defined
; range of (100-400)
Xscaled:k = scale(X, 40, 0, 1023, 0) ; scaling the raw sensor
; data to a user-defined
; range of (0-40)
if SW == 1 then
Amp = 0.333
elseif SW == 0 then
Amp = 0
endif
Out:a = foscil(1, Freq + Yscaled, 1, 1, Indx + Xscaled, 1)
out(Out*Amp, Out*Amp)
printks("Button=%d, RawX=%d, ScaleX=%d, RawY=%d, ScaleY=%d \\n", \
0.5, SW, X, Xscaled, Y, Yscaled)
endin
</CsInstruments>
<CsScore>
f 1 0 16384 10 1
i 1 0 z
e
</CsScore>
</CsoundSynthesizer>
<arduinoSketch>
// Joystick Example
// John ffitch & Richard Boulanger
// June 11, 2020
// BreadBoard & Arduino Setup
// Insert the Joystick Controller into the breadboard
// NOTE: Joystick Pins (in order from left to right) are:
GND, 5V, vrX, vrY, SW
// Connect the power rails on breadboard to 5V and GND on Arduino
// Connect GND and 5V from Joystick to + and - power rails on
// the breadboard
// Connect Joystick vrX on breadboard to Analog In A0 on the Arduino
// Connect Joystick vrY on breadboard to Analog In A1 on the Arduino
// Connect Joystick SW on breadboard to Digital Pin 2 on Arduino
// Arduino pin numbers
// Note: Because of the way that the Joystick stands up in a
// breadboard, in this example the vrX and vrY have been swapped.
const int SW_pin = 2; // Joystick switch output connected to
// Arduino digital pin 2
const int Y_pin = 0; // Joystick Y output connected to Arduino
// analog pin A0
const int X_pin = 1; // Joystick X output connected to Arduino
// analog pin A1
int lastState_SW_pin = 1;
int currentState_SW_pin;
void setup() {
// NOTE: Digital pins can be either inputs or outputs.
pinMode(SW_pin, INPUT_PULLUP); // Setting digital pin to input mode
// and using onboard pullup resistor
// to reduce noise.
Serial.begin(9600);
}
// put_val( ) - a function to send data values to the Csound
// "arduinoRead" opcode
// The first argument of the put_val function "int senChan" sets
// the software channel number that Csound reads
// NOTE: "senChan" does "not" define the input pin that is used on
// the Arduino for a specific sensor
// The specific Arduino input pin used by any sensor is assigned
// and set elsewhere in the Arduino sketch and mapped to a
// user-defined put_val "senChan" channel
void put_val(int senChan, int senVal)
// Set the Csound receive channel "senChan", and read from
// the sensor data stream "senVal"
{ // The packing of the data is sssssvvv 0vvvvvvv where s is a
// senChan bit, v a senVal bit and 0 is zero` bit
int low = senVal&0x7f;
int hi = ((senVal>>7)&0x07) | ((senChan&0x1f)<<3);
Serial.write(low); Serial.write(hi);
}
void loop() {
Serial.write(0xf8);
int currentState_SW_pin = digitalRead(SW_pin); // reading digital
// input 2 and
// assigning it to
// "currentState..."
if (currentState_SW_pin != lastState_SW_pin)
{ // checking if the value has changed
if (currentState_SW_pin == 1)
{
put_val(3,0); // In this sketch, the Joystick button,
//in Arduino digital pin 2, is sending a 0 or 1
// to Csound arduinoRead channel 3
}
else
{
put_val(3,1);
}
}
lastState_SW_pin = currentState_SW_pin;
int X = analogRead(X_pin); // reading the Joystick vrX data
// (0-1023) and asigning to X
put_val(2,X); // In this sketch, the Joystick vrX,
// in Arduino analog pin A1, is sending
// a 0-1023 to Csound arduinoRead channel 2
int Y = analogRead(Y_pin); // reading the Joystick vrY data
// (0-1023) and asigning to Y
put_val(1,Y); // In this sketch, the Joystick vrY,
// in Arduino analog pin A0, is sending
// a 0-1023 to Csound arduinoRead channel 1
delay(10);
}
</arduinoSketch>
Note