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/* Robot Inputs
This sketch shows you how to use the on-board
potentiometer and buttons as inputs.
Turning the potentiometer draws a clock-shaped
circle. The up and down buttons change the pitch,
while the left and right buttons change the tempo.
The middle button resets tempo and pitch.
Circuit:
* Arduino Robot
created 1 May 2013
by X. Yang
modified 12 May 2013
by D. Cuartielles
This example is in the public domain
*/
#include <ArduinoRobot.h>
// default tempo and pitch of the music
int tempo = 60;
int pitch = 1000;
void setup() {
// initialize the Robot, SD card, speaker, and display
Robot.begin();
Robot.beginTFT();
Robot.beginSpeaker();
Robot.beginSD();
// draw "lg0.bmp" and "lg1.bmp" on the screen
Robot.displayLogos();
// play a sound file
Robot.playFile("Melody.sqm");
}
void loop() {
// check the value of the buttons
keyDown(Robot.keyboardRead());
// check the value of the pot
drawKnob(Robot.knobRead());
}
// Draw the basic interface
void renderUI() {
//fill the buttons blank
Robot.fill(255, 255, 255);
Robot.rect(53, 58, 13, 13); // left
Robot.rect(93, 58, 13, 13); // right
Robot.rect(73, 38, 13, 13); // up
Robot.circle(79, 64, 6); // middle
Robot.rect(73, 78, 13, 13); // down
Robot.circle(26, 116, 18); // knob
//draw the vertical bargraph
int fullPart=map(pitch, 200, 2000, 0, 58); //length of filled bargraph
Robot.fill(255, 255, 255);
Robot.rect(21, 30, 13, 58-fullPart);
Robot.fill(0, 0, 255);
Robot.rect(21, 88-fullPart, 13, fullPart); //58-fullPart+30
//draw the horizontal bargraph
fullPart = map(tempo, 20, 100, 0, 58); // length of filled bargraph
Robot.fill(255, 190, 0);
Robot.rect(53, 110, fullPart, 13);
Robot.fill(255, 255, 255);
Robot.rect(53+fullPart, 110, 58-fullPart, 13);
}
void keyDown(int keyCode) {
// use a static int so it is persistent over time
static int oldKey;
switch(keyCode) {
case BUTTON_LEFT:
//left button pressed, reduces tempo
tempo -= 5;
if(tempo < 20) tempo = 20; //lowest tempo 20
Robot.fill(255,190,0);
Robot.rect(53, 58, 13, 13);
break;
case BUTTON_RIGHT:
//right button pressed, increases tempo
tempo += 5;
if(tempo > 100) tempo = 100; //highest tempo 100
Robot.fill(255,190,0);
Robot.rect(93, 58, 13, 13);
break;
case BUTTON_UP:
//up button pressed, increases pitch
pitch += 120;
if(pitch > 2000) pitch = 2000;
Robot.fill(0, 0, 255);
Robot.rect(73, 38, 13, 13);
break;
case BUTTON_DOWN:
//down button pressed, reduces pitch
pitch -= 120;
if(pitch < 200){
pitch = 200;
}
Robot.fill(0, 0, 255);
Robot.rect(73, 78, 13, 13);
break;
case BUTTON_MIDDLE:
//middle button pressed, resets tempo and pitch
tempo = 60;
pitch = 1000;
Robot.fill(160,160,160);
Robot.circle(79, 64, 6);
break;
case BUTTON_NONE:
//Only when the keys are released(thus BUTTON_NONE is
//encountered the first time), the interface will be
//re-drawn.
if(oldKey != BUTTON_NONE){
renderUI();
}
break;
}
if(oldKey != keyCode) {
// change the song's tempo
Robot.tempoWrite(tempo);
// change the song's pitch
Robot.tuneWrite(float(pitch/1000.0));
}
oldKey = keyCode;
}
void drawKnob(int val) {
static int x = 0, y = 0, val_old = 0;
// radian number, -3.14 to 3.14
float ang = map(val, 0, 1023, -PI*1000, PI*1000) / 1000.0;
// erase the old line
if (val_old != val) {
Robot.stroke(255, 255, 255);
Robot.line(26, 116, x, y);
}
// the following lines avoid a glitch in the TFT library
// that seems to appear when drawing a vertical line
if (val < 1011 && val > 265 || val < 253) {
//a bit math for drawing the hand inside the clock
x = 16*sin(ang)+26;
y = 16*cos(ang)+116;
}
if (val > 265 && val < 253) {
x = 10; y = 116;
}
if (val >= 1011) {
x = 27; y = 100;
}
Robot.stroke(0, 0, 0);
Robot.line(26, 116, x, y);
val_old = val;
}
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