/* * In this final lesson, you'll add a third button to set the alarm time * in addition to the clock time. The new button will switch the program * between two modes- alarm setting and time setting. * * In the time mode, operation will be the same as in the previous * program, but in the alarm mode, the alarm time will be displayed * and the buttons on 6 and 4 will set it. * * The new button will be on pin A5. */ #include "MakerScreenXVI.h" MakerScreenXVI lcd; //setting the initial time int seconds = 50; int minutes = 59; int hours = 1; bool AMPM = 1; long timer; long beepTimer; //setting the initial alarm int alarmMinute = 00; int alarmHour = 2; bool alarmAMPM = 1; bool alarmState = 0; int setTime = 0;//Which portion of time are you setting? 0=H, 1=M, 2=AMPM // Variable to control whether you're in the alarm setting mode // or the time setting mode. 0 is for time, 1 is for alarm. bool setMode = 0; //0 is time mode, 1 is alarm mode void setup() { lcd.begin(); lcd.backlightOn(); timer = millis();//set the timer variable equal to the internal counter pinMode(2,OUTPUT); //speaker on pin 2 and GND pinMode(6,INPUT_PULLUP); //Button to select which variable you're changing pinMode(4,INPUT_PULLUP); //Button to change the variable's value pinMode(A5,INPUT_PULLUP);//Button to toggle between alarm and time modes } void loop() { if (millis() - timer >= 1000){ seconds = seconds + 1; timer = timer + 1000; } //If the mode button is pressed.... if (digitalRead(A5) == LOW){ while (digitalRead(A5) == LOW){ //Wait for button to release delay(10); } //Switch between 0 and 1 just like you do with AMPM setMode = 1 - setMode; /* * Turn the alarm off when mode button ispressed so that changing * the mode cancels the old alarm */ alarmState = 0; } /* * The button on pin 6 acts the same regardless of the mode the clock * is in. */ if (digitalRead(6) == LOW){ //if the 'variable selector button' is pressed... while (digitalRead(6) == LOW){ //wait for button release... delay(10); } setTime = setTime + 1; //update setTime to H, M, or AMPM. if (setTime == 3){ setTime = 0; } } if (digitalRead(4) == LOW){ //if the 'variable changer button' is pressed... while (digitalRead(4) == LOW){ delay(10); } /* * There are now 6 potential variables you are changing: hour, minute, * and AM/PM for alarm and hour, minute, and AM/PM for time. * * The 'if' statements follow a pattern that you should try to follow: * 1) Check which variable (hour, minute, AMPM) * 2) Check which mode (time or alarm) * 3) Check for a rollover (second to minute, minute to hour) * * Step 3 doesn't happen for AMPM, but you should see that there are * 3 'sets' of 'if' statements below that follow the same pattern. Pay * close attention to the way that braces contain some 'if' statements * inside each other. */ // For each of these where you change the time, now check // which mode you're in and change variables based on that mode if (setTime == 0){ //setTime = 0 is 'hour' if (setMode == 0){ //setMode == 0 is 'time mode' hours = hours + 1; if (hours == 13){ hours = 1; } } else if (setMode == 1){ //setMode == 1 is 'alarm mode' alarmHour = alarmHour + 1; if (alarmHour == 13){ alarmHour = 1; } } } //if it's the minutes that you're updating... if (setTime == 1){ if (setMode == 0){ //and you're in time mode.. minutes = minutes + 1; //add to minutes and check for rollover if (minutes == 60){ minutes = 0; } } else if (setMode == 1){ // alarmMinute = alarmMinute + 1; if (alarmMinute == 60){ alarmMinute = 0; } } } if (setTime == 2){ if (setMode == 0){ AMPM = 1 - AMPM; } else if (setMode == 1){ alarmAMPM = 1 - alarmAMPM; } } } if (seconds >= 60){ seconds = seconds - 60; minutes = minutes + 1; alarmState = 0; beepTimer = millis(); } if (minutes >= 60){ minutes = minutes - 60; hours = hours + 1; if (hours == 12){ AMPM = 1 - AMPM; } if (hours == 13){ hours = 1; } } if ((hours == alarmHour)&&(minutes == alarmMinute)&&(AMPM == alarmAMPM)){ alarmState = 1; } if (alarmState == 0){//if the alarm is off, check which mode you're in /* * Make the display reflect which mode you are in. Add in a similar * pair of checks here to display either the current time or the * alarm time, depending on the mode. */ if (setMode == 0){ //setMode = 0 is 'time mode' lcd.clear(); lcd.print(hours); lcd.print(":"); if (minutes < 10){ lcd.print("0"); } lcd.print(minutes); lcd.print(":"); if (seconds < 10){ lcd.print("0"); } lcd.print(seconds); if (AMPM == 0){ lcd.print(" AM"); } if (AMPM == 1){ lcd.print(" PM"); } } if (setMode == 1){//setMode == 1 is alarm mode lcd.clear(); lcd.print(alarmHour); lcd.print(":"); if (alarmMinute < 10){ //Add the leading 0 for these minutes lcd.print("0"); } lcd.print(alarmMinute); if (alarmAMPM == 0){ lcd.print(" AM"); } if (alarmAMPM == 1){ lcd.print(" PM"); } } /* * setTime functions do the same thing whether in alarm mode or in * time mode. Their checks are outside of the setMode checks. */ if (setTime == 0){ lcd.print(" HH"); } if (setTime == 1){ lcd.print(" MM"); } if (setTime == 2){ lcd.print(" AP"); } noTone(2); } else{ //This is the 'else' condition for the alarmMode == 0. lcd.clear(); lcd.print("Wake Up!"); if (millis()-beepTimer < 500){ tone(2,330); } else if (millis()-beepTimer < 1000){ noTone(2); } else{ beepTimer = millis(); } } delay(150); } /* * This final project was about working in an extra set of * conditions to let you swap between setting the alarm and setting * the time. With this last addition, you have completed the alarm * clock! You can now set time and alarm directly from the hardware; * it's ready to go up as a fully functional clock! * * From here, you might add features like a snooze button, which turns * off an alarm and adds 5 minutes to the alarm time. You could * accomplish this with additional checks in the part of the 'mode select' * button which clears the old alarm. * * If you add that snooze, remember to check if adding in 5 minutes * works correctly- you want to be sure you get the correct new alarm * time! * * You might add in a different time delay for the alarm beeping so that * it goes off for 30 seconds instead of a full minute,or even until it * is reset by a button press! * * Other ideas: * - light displays along with the alarm, * - a backlight that automatically turns on and off at set times * - messages that change every hour and print below the time * - a combination of the clock with other * components from Let's Start Coding! * * That's the exciting thing about coding: the sky is the * limit, you can make whatever you think up! */ // (c) 2017 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense