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#include <Arduino.h>
#include <LiquidCrystal.h>
#include "Bounce.h"
void setup();
void loop();
// buffer size must be > LCD_CHARS
#define BUFFER_SIZE 80
char display_data[BUFFER_SIZE];
char buf[BUFFER_SIZE];
int buffered = 0;
#define LCD_ROWS 2
#define LCD_COLS 16
#define LCD_CHARS (LCD_COLS * LCD_ROWS)
#if LCD_CHARS > BUFFER_SIZE
#error "BUFFER too small"
#endif
// initialize the library with the numbers of the interface pins
#ifdef ENERGIA
LiquidCrystal lcd(13, 12, 10, 9, 8, 7);
#else
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
#endif
// indices: 0 = prev; 1 = pause; 2 = next
#ifdef ENERGIA
byte buttons[] = {15, 6, 5};
#else
byte buttons[] = {A0, A1, A2};
#endif
#define NUMBUTTONS sizeof(buttons)
#define DEBOUNCE 10
Bounce bounce_buttons[NUMBUTTONS];
void setup() {
byte i;
lcd.begin(LCD_COLS, LCD_ROWS);
// The usb chip hangs if it tries to send data and no-one listens
// so we give the client time to start up first
#ifdef ENERGIA
lcd.print("Waiting ...");
for (int i = 0; i < 20; i++) {
lcd.setCursor(0, 1);
lcd.print("Serial: ");
lcd.print(i);
lcd.print("/20");
delay(1000);
}
lcd.setCursor(0,0);
lcd.clear();
#endif
Serial.begin(9600);
Serial.setTimeout(5000);
for (i = 0; i < NUMBUTTONS; i++) {
pinMode(buttons[i], INPUT_PULLUP);
bounce_buttons[i] = Bounce(buttons[i], DEBOUNCE);
}
Serial.println("ready");
memset(display_data, ' ', BUFFER_SIZE);
strcpy(display_data, "Waiting for data");
}
bool button_just_pressed(int i) {
bounce_buttons[i].update();
return bounce_buttons[i].fallingEdge();
}
void loop() {
if (button_just_pressed(0)) {
Serial.println("previous");
}
if (button_just_pressed(1)) {
Serial.println("pause");
}
if (button_just_pressed(2)) {
Serial.println("next");
}
// buffer serial input ourselves
if (Serial.available() >= 1) {
buffered += Serial.readBytes(buf + buffered, LCD_CHARS - buffered);
}
if (buffered >= LCD_CHARS) {
strcpy(display_data, buf);
buffered = 0;
}
// update display
lcd.setCursor(0, 0);
int line = -1;
for (int i = 0; i < LCD_CHARS; i++) {
if (display_data[i] == '\0') {
break;
}
if (i % LCD_COLS == 0) {
line++;
lcd.setCursor(0, line);
}
lcd.write(display_data[i]);
}
}
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