HiQ-buzzer.ino

#include <SoftwareSerial.h> //include the needed libraries
#include <LiquidCrystal.h>

// initialize the lcd library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
/*
HiQ buzzer practice program
written By Alex Rodgers
 ----------------------------------------------------------------------------
 "THE BEER-WARE LICENSE" (Revision 42):
 Alex Rodgers wrote this file. As long as you retain this notice you
 can do whatever you want with this stuff. If we meet some day, and you think
 this stuff is worth it, you can buy me a beer in return Poul-Henning Kamp
 ----------------------------------------------------------------------------
I wrote this due to the HiQ team I am part of needing practice buzzers.

    ***********************************
    *                                 *
    *       LCD D14 pin------D2       *
    *       LCD D13 pin------D3       *
    *       LCD D12 pin------D4       *
    *       LCD D11 pin------D5       *
    *       P1's button------D6       *
    *       P2's button------D7       *
    *       Blue led(rgb)----D9       *
    *       Green led(rgb)---D10      *
    *       LCD enable pin---D11      *
    *       LCD RS pin-------D12      *
    *       7 seg RX pin-----D13      *
    *                                 *
    ***********************************

*/
const int softwareTx = 13; //define what pin to use for tx to 7 seg display


SoftwareSerial s7s(0, softwareTx); //define what pins to use for 7 seg display serial
const int p1=6; //define all needed variables
const int p2=7; 
const int led1=9;
const int led2=10;
int p1answ=1;
int p2answ=1;
int reading1;
int previous1=HIGH;
int reading2;
int previous2=HIGH;
long p1time=0;
long p2time=0;
long debounce=200;
int timeansw=16;
int led1read=LOW;
int led2read=LOW;
int p1timex=0;
int p2timex=0;
//button 2

// Generally, you should use "unsigned long" for variables that hold time
// The value will quickly become too large for an int to store
unsigned long previousMillis = 0;        // will store last time LED was updated

// constants won't change :
const long interval = 1000;           // interval at which to blink (milliseconds)

void setup() {
  pinMode(p1, INPUT_PULLUP); //buttons configured as inputs but with a pullup
  pinMode(p2, INPUT_PULLUP);
  pinMode(led1, OUTPUT); //leds configured as outputs
  pinMode(led2, OUTPUT);
  digitalWrite(led1, LOW); //make sure leds are off
  digitalWrite(led2, LOW);
  
  s7s.begin(9600); //begin communication with display
  Serial.begin(9600); //begin serial communication
  lcd.begin(16, 2); //define how many characters are on the lcd

s7s.write(0x76); //clear display
  s7s.print("-HI-");  //print hi on display
   lcd.setCursor(0, 0);
 lcd.print("HiQ buzzers"); //print to lcd
 lcd.setCursor(0, 1); 
 lcd.print("Written: Alex R");
 Serial.println(""); //now we are printing to serial
 Serial.println("HiQ buzzer practice program");
 Serial.println("Written by Alex Rodgers March, 2016");
 delay(2000); //delay so the message can be read
 s7s.write(0x76); //clear 7 seg display
 lcd.clear(); //clear lcd

}

void loop() {
  reading1=digitalRead(p1); //check pin modes
  reading2=digitalRead(p2);
  led1read=digitalRead(led1);
  led2read=digitalRead(led2);
  if (reading1 == LOW && previous1 == HIGH && p1answ == 1){
    lcd.setCursor(0,0);
    p1answ=2;
    if (timeansw==0){
      p1timex=(millis()-previousMillis);
      if(led2read==LOW){
        digitalWrite(led1, HIGH);
      }
   
   lcd.print("p1 ");
   lcd.print(p1timex/1000);
   lcd.print(".");
   lcd.print(p1timex%1000);
   lcd.println("s late");
   Serial.print("p1 is ");
   Serial.print(p1timex/1000);
   Serial.print(".");
   Serial.print(p1timex%1000, 4);
   Serial.println(" seconds late");
    } else{
      p1timex=((millis()-previousMillis)+((timeansw-1))*1000);
         lcd.print("p1 ");
   lcd.print(p1timex/1000);
   lcd.print(".");
   lcd.print(p1timex%1000);
   lcd.println("s early");
   Serial.print("p1 is ");
   Serial.print("p1 is ");
   Serial.print(p1timex/1000);
   Serial.print(".");
   Serial.print(p1timex%1000, 4);
   Serial.println(" seconds early");
    }
    }
     if (reading2 == LOW && previous2 == HIGH && p2answ == 1){
    p2answ=2;
    if (timeansw==0){
      p2timex=(millis()-previousMillis);
      if(led1read==LOW){
        digitalWrite(led2, HIGH);
      }
      lcd.setCursor(0,1);
   lcd.print("p2 ");
   lcd.print(p2timex/1000);
   lcd.print(".");
   lcd.print(p2timex%1000);
   lcd.print("s late");
   Serial.print("p2 is ");
   Serial.print(p2timex/1000);
   Serial.print(".");
   Serial.print(p2timex%1000, 4);
   Serial.println(" seconds late");
    } else{
      p2timex=((millis()-previousMillis)+((timeansw-1))*1000);
      lcd.setCursor(0,1);
   lcd.print("p2 ");
   lcd.print(p2timex/1000);
   lcd.print(".");
   lcd.print(p2timex%1000);
   lcd.print("s early");
   Serial.print("p2 is ");
   Serial.print(p2timex/1000);
   Serial.print(".");
   Serial.print(p2timex%1000, 4);
   Serial.println(" seconds early");
    }
    }
    
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval && timeansw>0) {
     
        if (timeansw>0){
  timeansw = timeansw-1;
    }
    
    previousMillis = currentMillis;// save the last time you blinked the LED
    
    s7s.write(0x76); //clear display
    s7s.write(0x79); //set cursor
    s7s.write(0x2); //cursor position
    s7s.write(timeansw/10); //write the tens place of time
    if (timeansw >= 10){ //check if time left is more than 10
    s7s.write(0x79); //set cursor
    s7s.write(0x3); //cursor position
    s7s.write(timeansw - 10); //write the one's place of time
    } else{ //if time left is less than 10
    s7s.write(0x79); //set cursor
    s7s.write(0x3); //cursor position
    s7s.write(timeansw); //set time
    }


  }
}