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Hello;
I would like to change the code so that when the clock detonates (no wires cut), the countdown automatically restarts. Would inserting countdown(); again after the “add back fractional seconds” section (line 498 in the Ver. 2 code) do that?
Thanks!No, you don’t want to call countdown() from within countdown()! That would be a recursive call.
In loop(), you want to just repeatedly call countdown. Replace the call to countdown() with:
while (!isDefused) {
countdownSeconds = defaultCountdownSeconds();
displayCountdown = true;
displayZeros = false;
countdown();
}While compiling the code, I received error: ‘defaultCountdownSeconds’ cannot be used as a function
I removed the parens from the line
countdownSeconds = defaultCountdownSeconds;()
and it compiled fine. As I’ve mentioned in other posts, I’m new to Arduino, and not much of a programmer.
Will this work? I don’t have my programming interface yet…
Thanks.Cool! Just uploaded it and it works great. I wanted a “demo mode” so this could be displayed with a running timer. I also modified the code to beep only in the last 10 seconds of the countdown and flash pin 23 for only 50 msec. upon detonation. After detonation, the display blanks for 10 seconds before recycling. I’m posting the complete (commented, with the tag “new code”) code here for anyone else’s use. BTW, this is my first Arduino coding experience! (had to truncate comments, sorry)
/*
Modified for repeating countdown, beep last 10 seconds and flash pin 23 for 50 msec.
Delay 10 seconds with blank display before repeating.
*/
#include
#define CLOCK 2
#define LATCH 3
#define DATA 4
#define COLON 13
#define MIN_BUTTON 0
#define HOUR_BUTTON 1
#define DET_BUTTON 2
#define ALARM_BUTTON 3
#define MIN_BUTTON_PIN 9
#define HOUR_BUTTON_PIN 10
#define DET_BUTTON_PIN 12
#define ALARM_BUTTON_PIN 15
#define LED_PM 16
#define LED_ALARM 17
#define LED_TOP 18
#define LED_DET 19
#define BUZZER 11
#define TRIGGER 14
#define WIRE_1 5
#define WIRE_2 6
#define WIRE_3 7
#define WIRE_4 8
#define TIMER1_SECOND_START 49910
#define DEFAULT_COUNTDOWN_DURATION 10
#define SNOOZE_MINUTES 9
#define ALARM_OFF 0
#define ALARM_ON 1
#define ALARM_DET 2
#define EEPROM_MAGIC_NUMBER 0xbad0
volatile byte hours = 12;
volatile byte minutes = 0;
volatile byte seconds = 0;
volatile boolean pm = false;
volatile unsigned int countdownDuration = DEFAULT_COUNTDOWN_DURATION;
volatile unsigned int countdownSeconds = DEFAULT_COUNTDOWN_DURATION;
unsigned int defaultCountdownSeconds;
boolean detPressed = false;
boolean displayZeros = false;
volatile boolean ticked = false;
boolean displayCountdown = false;
boolean countdownRunning = false;
boolean isDefused = false;
byte buttonPins[4] = {
MIN_BUTTON_PIN, HOUR_BUTTON_PIN, DET_BUTTON_PIN, ALARM_BUTTON_PIN};
byte buttonState[4] = {
HIGH, HIGH, HIGH, HIGH};
unsigned long buttonChange[4] = {
0L, 0L, 0L, 0L};
byte alarmHours = 12;
byte alarmMinutes = 0;
boolean alarmpm = false;
byte alarmMode = ALARM_OFF;
volatile boolean alarmRinging = false;
boolean displayAlarmTime = false;
// Set to true if you want the PM LED on during PM hours. I think it's too bright and
// annoying, so I'm setting this to false by default.
boolean usePMIndicator = false;
byte snoozeHours = 12;
byte snoozeMinutes = 0;
byte snoozepm = false;
boolean snoozeActivated = false;
boolean blank = false;
volatile byte currentDigit = 0;
void setup() {
pinMode(CLOCK, OUTPUT);
pinMode(LATCH, OUTPUT);
pinMode(DATA, OUTPUT);
pinMode(COLON, OUTPUT);
digitalWrite(COLON, LOW);
pinMode(LED_PM, OUTPUT);
pinMode(LED_ALARM, OUTPUT);
pinMode(LED_TOP, OUTPUT);
pinMode(LED_DET, OUTPUT);
pinMode(BUZZER, OUTPUT);
pinMode(TRIGGER, OUTPUT);
pinMode(HOUR_BUTTON_PIN, INPUT);
pinMode(MIN_BUTTON_PIN, INPUT);
pinMode(ALARM_BUTTON_PIN, INPUT);
pinMode(DET_BUTTON_PIN, INPUT);
pinMode(WIRE_1, INPUT);
pinMode(WIRE_2, INPUT);
pinMode(WIRE_3, INPUT);
pinMode(WIRE_4, INPUT);
digitalWrite(HOUR_BUTTON_PIN, HIGH);
digitalWrite(MIN_BUTTON_PIN, HIGH);
digitalWrite(ALARM_BUTTON_PIN, HIGH);
digitalWrite(DET_BUTTON_PIN, HIGH);
digitalWrite(WIRE_1, HIGH);
digitalWrite(WIRE_2, HIGH);
digitalWrite(WIRE_3, HIGH);
digitalWrite(WIRE_4, HIGH);
// Read data from EEPROM
if (EEPROMValid()) {
hours = EEPROM.read(2);
minutes = EEPROM.read(3);
seconds = EEPROM.read(4);
pm = EEPROM.read(5);
alarmHours = EEPROM.read(6);
alarmMinutes = EEPROM.read(7);
alarmpm = EEPROM.read(8);
alarmMode = EEPROM.read(9);
defaultCountdownSeconds = EEPROM.read(10);
defaultCountdownSeconds = defaultCountdownSeconds << 8;
defaultCountdownSeconds |= EEPROM.read(11);
}
else {
hours = 12;
minutes = 0;
seconds = 0;
alarmHours = 12;
alarmMinutes = 0;
pm = false;
alarmpm = false;
alarmMode = ALARM_OFF;
defaultCountdownSeconds = DEFAULT_COUNTDOWN_DURATION;
writeEEPROM();
}
// Initialize timers.
// Timer1 is used to keep the clock time
// Timer2 is used for the display multiplexing
// Disable the timer overflow interrupt
TIMSK2 &= ~(1 << TOIE2);
// Set timer2 to normal mode
TCCR2A &= ~((1 << WGM21) | (1 << WGM20));
TCCR2B &= ~(1 << WGM22);
// Use internal I/O clock
ASSR &= ~(1 << AS2);
// Disable compare match interrupt
TIMSK2 &= ~(1 << OCIE2A);
// Prescalar is clock divided by 128
TCCR2B |= (1 << CS22);
TCCR2B &= ~(1 << CS21);
TCCR2B |= (1 << CS20);
// Start the counting at 0
TCNT2 = 0;
// Enable the timer2 overflow interrupt
TIMSK2 |= (1 << TOIE2);
// init timer1
// set prescaler to 1024
TIMSK1 &= ~(1<
TCCR1B = (1<
// 65535 - 15625 = 49910
TCNT1 = TIMER1_SECOND_START;
randomSeed(analogRead(0));
}
void loop() {
delay(10); // this helps with button debouncing
if (ticked) {
ticked = false;
writeEEPROM();
}
if (alarmRinging) {
if (alarmMode == ALARM_ON) {
ringAlarm();
}
if (alarmMode == ALARM_DET) {
for(int i=0;i<4;i++) {
beep(3900, 250, false);
delay(250);
}
displayCountdown = true;
countdownSeconds = defaultCountdownSeconds;
countdown();
alarmRinging = false;
}
}
// check input
if ((buttonPressed(ALARM_BUTTON)) && (!displayCountdown)) {
displayAlarmTime = true;
if (alarmpm) {
digitalWrite(LED_PM, HIGH);
}
else {
digitalWrite(LED_PM, LOW);
}
if (alarmMode == ALARM_OFF) {
digitalWrite(LED_ALARM, LOW);
digitalWrite(LED_DET, LOW);
}
else {
digitalWrite(LED_ALARM, HIGH);
if (alarmMode == ALARM_DET) {
digitalWrite(LED_DET, HIGH);
}
else {
digitalWrite(LED_DET, LOW);
}
}
}
else {
displayAlarmTime = false;
digitalWrite(LED_ALARM, LOW);
digitalWrite(LED_DET, LOW);
}
if (buttonPressedNew(HOUR_BUTTON) || buttonHeld(HOUR_BUTTON, 150)) {
if ((!displayAlarmTime) && (!displayCountdown)) {
hours++;
if (hours == 12) {
pm = !pm;
}
if (hours == 13) {
hours = 1;
}
if (pm) {
digitalWrite(LED_PM, HIGH);
}
else {
digitalWrite(LED_PM, LOW);
}
}
if (displayAlarmTime) {
// setting the alarm
alarmHours++;
if (alarmHours == 12) {
alarmpm = !alarmpm;
}
if (alarmHours == 13) {
alarmHours = 1;
}
if (alarmpm) {
digitalWrite(LED_PM, HIGH);
}
else {
digitalWrite(LED_PM, LOW);
}
snoozeHours = alarmHours;
snoozeMinutes = alarmMinutes;
snoozepm = alarmpm;
}
if (displayCountdown) {
if (!buttonPressed(ALARM_BUTTON)) {
if (countdownSeconds < 5940) {
countdownSeconds += 60;
countdownDuration += 60;
}
}
else {
if (countdownSeconds >= 60 ) {
countdownSeconds -= 60;
countdownDuration -= 60;
}
}
}
}
else {
if ((!displayAlarmTime) && (!buttonPressed(HOUR_BUTTON))) {
if ((pm) && (usePMIndicator)) {
digitalWrite(LED_PM, HIGH);
}
else {
digitalWrite(LED_PM, LOW);
}
}
}
if (buttonPressedNew(MIN_BUTTON) || buttonHeld(MIN_BUTTON, 150)) {
if ((!displayAlarmTime) && (!displayCountdown)) {
minutes++;
if (minutes == 60) {
minutes = 0;
}
seconds = 0;
TCNT1 = TIMER1_SECOND_START;
}
if (displayAlarmTime) {
// setting the alarm
alarmMinutes++;
if (alarmMinutes == 60) {
alarmMinutes = 0;
}
snoozeHours = alarmHours;
snoozeMinutes = alarmMinutes;
snoozepm = alarmpm;
}
if (displayCountdown) {
if (!buttonPressed(ALARM_BUTTON)) {
if (countdownSeconds < 5999) {
countdownSeconds++;
countdownDuration++;
}
}
else {
if (countdownSeconds > 0) {
countdownSeconds--;
countdownDuration--;
}
}
}
}
if (buttonPressedNew(DET_BUTTON)) {
if (displayAlarmTime) {
alarmMode++;
if (alarmMode > ALARM_DET) {
alarmMode = ALARM_OFF;
}
if (alarmMode == ALARM_OFF) {
snoozeActivated = false;
}
return;
}
if ((displayZeros) || (isDefused)) {
isDefused = false;
displayZeros = false;
displayCountdown = false;
countdownSeconds = countdownSeconds;
return;
}
// The DET button has been pressed but not released yet.
detPressed = true;
countdownSeconds = defaultCountdownSeconds;
displayCountdown = true;
}
if (!buttonPressed(DET_BUTTON)) {
if (detPressed) {
detPressed = false;
defaultCountdownSeconds = countdownSeconds;
writeEEPROM();
// New code here for repeating countdown after detonation:
while (!isDefused) {
countdownSeconds = defaultCountdownSeconds;
displayCountdown = true;
displayZeros = false;
countdown();
}
}
}
}
void ringAlarm() {
int frequency = 3900;
int duration = 250; // each beep is .25s
int us = 1000000 / frequency / 2;
int toneLoopCount = (duration * ((float)frequency/1000.0));
int pauseLoopCount = 20000;
while (alarmRinging) {
for(int i=0;i
if (buttonPressed(ALARM_BUTTON)) {
alarmRinging = false;
snoozeActivated = false;
break;
}
delayMicroseconds(us);
PORTB &= ~(1 << 3);
if (buttonPressed(DET_BUTTON)) {
alarmRinging = false;
snooze();
break;
}
delayMicroseconds(us);
}
for(int i=0;i
alarmRinging = false;
snoozeActivated = false;
break;
}
if (buttonPressed(DET_BUTTON)) {
alarmRinging = false;
snooze();
break;
}
}
} // while (alarmRinging)
}
void snooze() {
snoozeActivated = true;
// set the snooze time to current time plus 9 minutes
snoozeHours = hours;
snoozepm = pm;
snoozeMinutes = minutes + SNOOZE_MINUTES;
if (snoozeMinutes >= 60) {
snoozeMinutes -= 60;
snoozeHours++;
if (snoozeHours == 12) {
snoozepm = !snoozepm;
}
if (snoozeHours == 13) {
snoozeHours = 1;
}
}
}
void countdown() {
int ledCounter = 0;
int ledCounterThreshold = 100000;
byte ledCurrentState = HIGH;
byte defusePin;
byte detPin;
boolean defused = false;
countdownRunning = true;
int fractionalSecond;
// assign random pins
defusePin = random(WIRE_1, (WIRE_4+1));
detPin = defusePin;
while (detPin == defusePin) {
detPin = random(WIRE_1, (WIRE_4+1));
}
digitalWrite(LED_PM, LOW); // turn off the PM LED
// Keep track of how far we are into the current
// second so we can correct later.
fractionalSecond = TCNT1 - TIMER1_SECOND_START;
// Reset back to the last second boundary so we can start the countdown
// immediately and so that the first second isn't truncated
TCNT1 = TIMER1_SECOND_START;
beep(3800, 30);
digitalWrite(LED_DET, ledCurrentState);
while ((countdownSeconds > 0) && (!defused)) {
for(int i=0;i<10000;i++) {
// get input
if (digitalRead(defusePin) == HIGH) {
defused = true;
break;
}
if (digitalRead(detPin) == HIGH) {
countdownSeconds = 0;
break;
}
}
delay(20);
if (ledCounter++ > ledCounterThreshold) {
ledCounter = 0;
if (ledCurrentState == HIGH) {
ledCurrentState = LOW;
}
else {
ledCurrentState = HIGH;
}
digitalWrite(LED_DET, ledCurrentState);
}
}
digitalWrite(LED_DET, LOW);
countdownRunning = false;
if (!defused) {
detonate();
}
else {
beep(4500, 80);
isDefused = true;
delay(2000);
}
// Now to keep the time accurate, add back in the fractional
// second that we took off when we started the countdown sequence.
// Wait until we can add it back to TCNT1 without overflowing.
while (TCNT1 >= (65535 - fractionalSecond));
TCNT1 += fractionalSecond;
}
void detonate() {
for(int i=0;i<8;i++) {
digitalWrite(LED_DET, HIGH);
beep(5000, 50, false);
delay(25);
digitalWrite(LED_DET, LOW);
delay(25);
}
blank = true;
// new code here to trigger pin 23 for .05 sec.
digitalWrite(TRIGGER, HIGH);
delay(50);
digitalWrite(TRIGGER, LOW);
for(int i=0;i<50;i++) {
digitalWrite(random(LED_PM, LED_DET+1), HIGH);
digitalWrite(random(LED_PM, LED_DET+1), HIGH);
for(int j=0;j<5;j++) {
beep(random(100, 300), 10);
}
for(int led=LED_PM;led<=LED_DET;led++) {
digitalWrite(led, LOW);
}
}
displayCountdown = false;
blank = true;
displayZeros = true;
// New code to delay (and blank display) before next cycle
delay(10000);
blank = false;
}
// return true if the button is pressed.
boolean buttonPressed(byte button) {
if (digitalRead(buttonPins[button]) == LOW) {
// the button is currently pressed
if (buttonState[button] == HIGH) {
// if the button was not pressed before, update the state.
buttonChange[button] = millis();
buttonState[button] = LOW;
}
return true;
}
else {
// The button is currently not pressed
if (buttonState[button] == LOW) {
// if the button was pressed before, update the state.
buttonChange[button] = millis();
buttonState[button] = HIGH;
}
return false;
}
}
// return true if the button is pressed and it is a new press (not held)
boolean buttonPressedNew(byte button) {
if (digitalRead(buttonPins[button]) == LOW) {
// The button is currently pressed
if (buttonState[button] == HIGH) {
// This is a new press.
buttonChange[button] = millis();
buttonState[button] = LOW;
return true;
}
// This is not a new press.
return false;
}
else {
// The button is currently not pressed
if (buttonState[button] == LOW) {
buttonChange[button] = millis();
buttonState[button] = HIGH;
}
return false;
}
}
// return true if the button is pressed and has been held for at least n milliseconds
boolean buttonHeld(byte button, int n) {
if (digitalRead(buttonPins[button]) == LOW) {
// the button is currently pressed
if (buttonState[button] == HIGH) {
// if the button was not pressed before, update the state and return false.
buttonChange[button] = millis();
buttonState[button] = LOW;
return false;
}
if ((millis() - buttonChange[button]) >= n) {
// the button has been pressed for over n milliseconds.
// update the state change time even though the state hasn't changed.
// we update the state change time so we can start the counting over
buttonChange[button] = millis();
return true;
}
// The button is being held, but has not been held for longer than n milliseconds.
return false;
}
else {
// The button is currently not pressed
if (buttonState[button] == LOW) {
// if the button was pressed before, update the state.
buttonChange[button] = millis();
buttonState[button] = HIGH;
}
return false;
}
}
void beep(int frequency, int duration) {
beep(frequency, duration, true);
}
void beep(int frequency, int duration, boolean disableDisplayInterrupt) {
int us = 1000000 / frequency / 2;
int loopCount = (duration * ((float)frequency/1000.0));
if (disableDisplayInterrupt) {
TIMSK2 &= ~(1 << TOIE2);
}
for(int i=0;i
delayMicroseconds(us);
PORTB &= ~(1 << 3);
delayMicroseconds(us);
}
TIMSK2 |= (1 << TOIE2);
}
void writeEEPROM() {
setEEPROMValid();
EEPROM.write(2, hours);
EEPROM.write(3, minutes);
EEPROM.write(4, seconds);
EEPROM.write(5, pm);
EEPROM.write(6, alarmHours);
EEPROM.write(7, alarmMinutes);
EEPROM.write(8, alarmpm);
EEPROM.write(9, alarmMode);
EEPROM.write(10, (defaultCountdownSeconds >> 8));
EEPROM.write(11, (defaultCountdownSeconds & 0xFF));
}
boolean EEPROMValid() {
// determine if the EEPROM has ever been written by this firmware
// so we can determine if the values can be trusted
unsigned int magic = EEPROM.read(0);
magic = magic << 8;
magic |= EEPROM.read(1);
return (magic == EEPROM_MAGIC_NUMBER);
}
void setEEPROMValid() {
EEPROM.write(0, EEPROM_MAGIC_NUMBER >> 8);
EEPROM.write(1, (EEPROM_MAGIC_NUMBER & 0xFF));
}
// This is the display interrupt to implement multiplexing of the digits.
ISR(TIMER2_OVF_vect) {
byte nDigits = 4;
byte data;
byte digitValue;
byte displayHours, displayMinutes;
TCNT2 = 0;
displayHours = hours;
displayMinutes = minutes;
if (displayAlarmTime) {
displayHours = alarmHours;
displayMinutes = alarmMinutes;
}
if (displayCountdown) {
displayHours = countdownSeconds / 60;
displayMinutes = countdownSeconds % 60;
}
if (displayZeros) {
displayHours = 0;
displayMinutes = 0;
}
if ((displayHours < 10) && (!displayCountdown) && (!displayZeros)) {
nDigits = 3;
}
if (++currentDigit > (nDigits-1)) {
currentDigit = 0;
}
switch (currentDigit) {
case 0:
digitValue = displayMinutes % 10;
break;
case 1:
digitValue = displayMinutes / 10;
break;
case 2:
digitValue = displayHours % 10;
break;
case 3:
digitValue = displayHours / 10;
break;
}
// Upper 4 bits of data are the value for the current digit.
// They are loaded into shift register outputs QA-QD
data = (digitValue << 4);
// Lower 4 bits 3-0 represent which digit to turn on.
// 3 is most significant digit, 0 is least
// They are loaded into shift register outputs QE-QH
// Digit transistors are active low, so set them all high
data |= 0x0F;
if (!blank) {
// now turn off the bit for digit we want illuminated.
data &= ~(1 << currentDigit);
}
digitalWrite(LATCH, LOW);
shiftOut(DATA, CLOCK, LSBFIRST, data);
digitalWrite(LATCH, HIGH);
}
// Timer 1 interrupt. This executes every second.
ISR(TIMER1_OVF_vect) {
TCNT1 = TIMER1_SECOND_START;
ticked = true;
seconds++;
if (seconds == 60) {
seconds = 0;
minutes++;
if (minutes == 60) {
minutes = 0;
hours++;
if (hours == 12) {
pm = !pm;
}
if (hours == 13) {
hours = 1;
}
}
}
if ((!countdownRunning) && (alarmMode != ALARM_OFF)) {
if ((alarmHours == hours) && (alarmMinutes == minutes) && (seconds == 0) && (alarmpm == pm)) {
alarmRinging = true;
}
if ((snoozeActivated) && (snoozeHours == hours) && (snoozeMinutes == minutes) && (seconds == 0) && (snoozepm == pm)) {
alarmRinging = true;
}
}
if ((countdownRunning) && (countdownSeconds > 0)) {
// new code beep commented out for countdown
//beep(3800, 30);
countdownSeconds--;
}
//New code beep last 10 seconds
if ((countdownRunning) && (countdownSeconds < 11)) {
beep(3800, 30);
}
}
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