Hi,
I'm following this project that's a BPM calculator with tap functionality. The creator of this project says that he wrote this code with much help from others. I asked the following question to him but he said he didn't know much about how to implement it.
It's actually pretty simple. When the encoder button is being held for a second, the bpm counter shall pause, and once released, it'll start from the beginning. I need this functionality to sync with the rest of my band on live stage.
I'm following this project that's a BPM calculator with tap functionality. The creator of this project says that he wrote this code with much help from others. I asked the following question to him but he said he didn't know much about how to implement it.
It's actually pretty simple. When the encoder button is being held for a second, the bpm counter shall pause, and once released, it'll start from the beginning. I need this functionality to sync with the rest of my band on live stage.
#define USE_TIMER_1 false
#define USE_TIMER_2 true
#define USE_TIMER_3 false
#define USE_TIMER_4 false
#define USE_TIMER_5 false
#include <TimerInterrupt.h>
#include <ISR_Timer.h>
#include <ClickEncoder.h>
#include <TimerOne.h>
#include <ArduinoTapTempo.h>
#include <LiquidCrystal.h>
#define LCD_RS 8
#define LCD_RW 9
#define LCD_EN 10
#define LCD_D4 4
#define LCD_D5 5
#define LCD_D6 6
#define LCD_D7 7
#define LCD_CHARS 16
#define LCD_LINES 2
LiquidCrystal lcd(LCD_RS, LCD_RW, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7);
#define LED 2
#define MAX_BPM 480
#define MIN_BPM 40
#define MULT1 11
#define MULT2 12
const int BUTTON_PIN = 3;
ArduinoTapTempo tapTempo;
ClickEncoder *encoder;
int16_t last, value, bpmtemp, encoderpos, interval;
float period;
uint16_t counter = 0;
unsigned long lastUpdate = 0;
uint8_t multiplier = 1;
int multplusState = 0;
int multminState = 0;
int lastmultplusState = 0;
int lastmultminState = 0;
void timerIsr() {
encoder->service();
}
//--PULSE INTERRUPT--//
void PulseHandler()
{
counter+=2;
if (counter >= period)
{
counter = 0;
digitalWrite(LED, !digitalRead(LED));
}
}
void displayAccelerationStatus() {
lcd.setCursor(0, 0);
lcd.print("BEATS PER MINUTE: ");
}
void setup()
{
// IO INIT
pinMode(LED, OUTPUT);
pinMode(BUTTON_PIN, INPUT);
digitalWrite(BUTTON_PIN, HIGH);
pinMode(MULT1, INPUT_PULLUP);
pinMode(MULT2, INPUT_PULLUP);
// ENCODER INIT
encoder = new ClickEncoder(A1, A0, A2, 4);
// LCD INIT
lcd.begin(LCD_CHARS, LCD_LINES);
lcd.clear();
displayAccelerationStatus();
// VARIABLES
value = 120; // The BPM value
bpmtemp = 0; // Temporary BPM
encoderpos = 0; // Encoder position
last = -1; // Last BPM (unused, potentially usable to only update LCD and period once the BPM actually changed)
interval = 1; // Period of BPM timer in ms (2ms or double speed because a pulse consists of an upgoing and downgoing slewage)
period = 30000 / value * 2; // Convert BPM to desired output period
// TIMER INIT
Timer1.initialize(1000); // For rotary acceleration
Timer1.attachInterrupt(timerIsr);
ITimer2.init(); // For output pulses
if (ITimer2.attachInterruptInterval(interval, PulseHandler));
tapTempo.setMinBPM((float)MIN_BPM);
tapTempo.setMaxBPM((float)MAX_BPM);
//tapTempo.disableSkippedTapDetection();
//tapTempo.setTotalTapValues(4);
tapTempo.setBeatsUntilChainReset(10);
Serial.begin(9600);
}
void loop() {
boolean buttonDown = digitalRead(BUTTON_PIN) == LOW; // if pressed, buttondown = true
tapTempo.update(buttonDown); // update if buttondown = true
if ((uint16_t)tapTempo.getBPM() != bpmtemp)
{
encoderpos = 0;
bpmtemp = (uint16_t)tapTempo.getBPM();
}
encoderpos += encoder->getValue();
// MIGHT BE ABLE TO PUT LINES 119 THROUGH 131 INTO AN IF ELSE STATEMENT
value = bpmtemp + encoderpos;
if (value >= MAX_BPM) // Restrict to max bpm
{
encoderpos = MAX_BPM - bpmtemp;
value = MAX_BPM;
}
if (value <= MIN_BPM) // Restrict to min bpm
{
encoderpos = MIN_BPM - bpmtemp;
value = MIN_BPM;
}
// Alter the output pulse period based on the bpm
period = (30000 / value * 2) / multiplier;
multplusState = digitalRead(MULT2);
// compare the buttonState to its previous state
if (multplusState != lastmultplusState) {
// if the state has changed, increment the counter
if (multplusState == HIGH) {
// if the current state is HIGH then the button
// wend from off to on:
multiplier += 1;
if(multiplier >4)
{
multiplier = 4;
}
lcd.setCursor(11, 1);
lcd.print(multiplier);
}
}
// save the current state as the last state,
//for next time through the loop
lastmultplusState = multplusState;
multminState = digitalRead(MULT1);
// compare the buttonState to its previous state
if (multminState != lastmultminState) {
// if the state has changed, increment the counter
if (multminState == HIGH) {
// if the current state is HIGH then the button
// wend from off to on:
multiplier -= 1;
if(multiplier <1)
{
multiplier = 1;
}
lcd.setCursor(11, 1);
lcd.print(multiplier);
}
}
// save the current state as the last state,
//for next time through the loop
lastmultminState = multminState;
// Show the current BPM on the LCD
if (lastUpdate - millis() > 16 && last != value)
{
lastUpdate = millis();
last = value;
Serial.println("JA");
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(6, 1);
lcd.print(value);
lcd.setCursor(10, 1);
lcd.print("x");
lcd.setCursor(11, 1);
lcd.print(multiplier);
if (value == MAX_BPM)
{
lcd.setCursor(13, 1);
lcd.print("MAX");
}
if (value == MIN_BPM)
{
lcd.setCursor(0, 1);
lcd.print("MIN");
}
}
ClickEncoder::Button b = encoder->getButton();
if (b != ClickEncoder::Open) {
Serial.print("Button: ");
#define VERBOSECASE(label) case label: Serial.println(#label); break;
switch (b) {
VERBOSECASE(ClickEncoder:ressed);
VERBOSECASE(ClickEncoder::Held)
VERBOSECASE(ClickEncoder::Released)
VERBOSECASE(ClickEncoder::Clicked)
case ClickEncoder:oubleClicked:
Serial.println("ClickEncoder:
encoder->setAccelerationEnabled(!encoder->getAccelerationEnabled());
Serial.print(" Acceleration is ");
Serial.println((encoder->getAccelerationEnabled()) ? "enabled" : "disabled");
#ifdef WITH_LCD
displayAccelerationStatus();
#endif
break;
}
}
}
