www.huvitera.ee/arduino-3A
//NR1 - SevSeg Test
#include "SevSeg.h"
SevSeg sevseg;
void setup(){
byte numDigits = 4;
byte digitPins[] = {13, 12, 11, 10};
byte segmentPins[] = {9, 2, 3, 5, 6, 8, 7, 4};
bool resistorsOnSegments = true;
bool updateWithDelaysIn = true;
byte hardwareConfig = COMMON_CATHODE;
sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments);
sevseg.setBrightness(90);
}
void loop(){
sevseg.setNumber(1234, 3);
sevseg.refreshDisplay();
}
//NR2- TIMER
#include <math.h>
int digit_pin[] = {13, 12, 11, 10}; // PWM Display digit pins from left to right
int speakerPin = A4;
#define DIGIT_ON LOW
#define DIGIT_OFF HIGH
int segA = 9;
int segB = 2;
int segC = 3;
int segD = 5;
int segE = 6; //pin 6 is used bij display 1 for its pwm function
int segF = 8;
int segG = 7;
int segPD = 4;
int button1=A0;
int button2=A1;
int button3=A2;
int button4=A3;
int countdown_time = 10;
struct struct_digits {
int digit[4];
};
void setup() {
pinMode(segA, OUTPUT);
pinMode(segB, OUTPUT);
pinMode(segC, OUTPUT);
pinMode(segD, OUTPUT);
pinMode(segE, OUTPUT);
pinMode(segF, OUTPUT);
pinMode(segG, OUTPUT);
for (int i=0; i<4; i++) {
pinMode(digit_pin[i], OUTPUT);
}
pinMode(speakerPin, OUTPUT);
pinMode(button1,INPUT_PULLUP);
pinMode(button2,INPUT_PULLUP);
pinMode(button3,INPUT_PULLUP);
pinMode(button4,INPUT_PULLUP);
}
void playTone(int tone, int duration) {
for (long k = 0; k < duration * 1000L; k += tone * 2) {
digitalWrite(speakerPin, HIGH);
delayMicroseconds(tone);
digitalWrite(speakerPin, LOW);
delayMicroseconds(tone);
}
}
void lightNumber(int numberToDisplay) {
#define SEGMENT_ON HIGH
#define SEGMENT_OFF LOW
switch (numberToDisplay){
case 0:
digitalWrite(segA, SEGMENT_ON);
digitalWrite(segB, SEGMENT_ON);
digitalWrite(segC, SEGMENT_ON);
digitalWrite(segD, SEGMENT_ON);
digitalWrite(segE, SEGMENT_ON);
digitalWrite(segF, SEGMENT_ON);
digitalWrite(segG, SEGMENT_OFF);
break;
case 1:
digitalWrite(segA, SEGMENT_OFF);
digitalWrite(segB, SEGMENT_ON);
digitalWrite(segC, SEGMENT_ON);
digitalWrite(segD, SEGMENT_OFF);
digitalWrite(segE, SEGMENT_OFF);
digitalWrite(segF, SEGMENT_OFF);
digitalWrite(segG, SEGMENT_OFF);
break;
case 2:
digitalWrite(segA, SEGMENT_ON);
digitalWrite(segB, SEGMENT_ON);
digitalWrite(segC, SEGMENT_OFF);
digitalWrite(segD, SEGMENT_ON);
digitalWrite(segE, SEGMENT_ON);
digitalWrite(segF, SEGMENT_OFF);
digitalWrite(segG, SEGMENT_ON);
break;
case 3:
digitalWrite(segA, SEGMENT_ON);
digitalWrite(segB, SEGMENT_ON);
digitalWrite(segC, SEGMENT_ON);
digitalWrite(segD, SEGMENT_ON);
digitalWrite(segE, SEGMENT_OFF);
digitalWrite(segF, SEGMENT_OFF);
digitalWrite(segG, SEGMENT_ON);
break;
case 4:
digitalWrite(segA, SEGMENT_OFF);
digitalWrite(segB, SEGMENT_ON);
digitalWrite(segC, SEGMENT_ON);
digitalWrite(segD, SEGMENT_OFF);
digitalWrite(segE, SEGMENT_OFF);
digitalWrite(segF, SEGMENT_ON);
digitalWrite(segG, SEGMENT_ON);
break;
case 5:
digitalWrite(segA, SEGMENT_ON);
digitalWrite(segB, SEGMENT_OFF);
digitalWrite(segC, SEGMENT_ON);
digitalWrite(segD, SEGMENT_ON);
digitalWrite(segE, SEGMENT_OFF);
digitalWrite(segF, SEGMENT_ON);
digitalWrite(segG, SEGMENT_ON);
break;
case 6:
digitalWrite(segA, SEGMENT_ON);
digitalWrite(segB, SEGMENT_OFF);
digitalWrite(segC, SEGMENT_ON);
digitalWrite(segD, SEGMENT_ON);
digitalWrite(segE, SEGMENT_ON);
digitalWrite(segF, SEGMENT_ON);
digitalWrite(segG, SEGMENT_ON);
break;
case 7:
digitalWrite(segA, SEGMENT_ON);
digitalWrite(segB, SEGMENT_ON);
digitalWrite(segC, SEGMENT_ON);
digitalWrite(segD, SEGMENT_OFF);
digitalWrite(segE, SEGMENT_OFF);
digitalWrite(segF, SEGMENT_OFF);
digitalWrite(segG, SEGMENT_OFF);
break;
case 8:
digitalWrite(segA, SEGMENT_ON);
digitalWrite(segB, SEGMENT_ON);
digitalWrite(segC, SEGMENT_ON);
digitalWrite(segD, SEGMENT_ON);
digitalWrite(segE, SEGMENT_ON);
digitalWrite(segF, SEGMENT_ON);
digitalWrite(segG, SEGMENT_ON);
break;
case 9:
digitalWrite(segA, SEGMENT_ON);
digitalWrite(segB, SEGMENT_ON);
digitalWrite(segC, SEGMENT_ON);
digitalWrite(segD, SEGMENT_ON);
digitalWrite(segE, SEGMENT_OFF);
digitalWrite(segF, SEGMENT_ON);
digitalWrite(segG, SEGMENT_ON);
break;
case 10:
digitalWrite(segA, SEGMENT_OFF);
digitalWrite(segB, SEGMENT_OFF);
digitalWrite(segC, SEGMENT_OFF);
digitalWrite(segD, SEGMENT_OFF);
digitalWrite(segE, SEGMENT_OFF);
digitalWrite(segF, SEGMENT_OFF);
digitalWrite(segG, SEGMENT_OFF);
break;
}
}
void SwitchDigit(int digit) {
for (int i=0; i<4; i++) {
if (i == digit) {
digitalWrite(digit_pin[i], DIGIT_ON);
} else {
digitalWrite(digit_pin[i], DIGIT_OFF);
}
}
}
struct struct_digits IntToDigits(int n){
struct struct_digits dig;
int zeros=0;
int d;
for (int i=0; i<4; i++) {
d=n/pow(10,3-i);
zeros += d;
n = n - d*pow(10,3-i);
if (zeros!=0 || i==3) {
dig.digit[i]=d;
} else {
dig.digit[i]=10;
}
}
return dig;
}
void PrintNumber(int n, int time) {
struct struct_digits dig;
dig = IntToDigits(n);
for (int i=0; i<= time/20; i++) {
if (digitalRead(button2)==LOW) {
return;
}
for (int j=0; j<4; j++) {
SwitchDigit(j);
lightNumber(dig.digit[j]);
delay(5);
}
}
}
bool Countdown(int n, int del){
for (int q=n; q>0; q--){
PrintNumber(q,del);
if (digitalRead(button2)==LOW) {
return false;
}
}
PrintNumber(0,0);
playTone(1519,1000);
return true;
}
void reset() {
int m, zeros, d, pressed3 = 0, pressed4 = 0;
m=countdown_time;
struct struct_digits dig;
dig = IntToDigits(countdown_time);
while (digitalRead(button1)==HIGH) {
for (int j=0; j<4; j++) {
SwitchDigit(j);
lightNumber(dig.digit[j]);
delay(5);
}
if (digitalRead(button3)==LOW) {
if (pressed3 == 0 || pressed3 > 30) {
if (countdown_time > 0) {
countdown_time -= 1 ;
}
dig = IntToDigits(countdown_time);
}
pressed3 += 1;
}
else if (digitalRead(button4)==LOW) {
if (pressed4 == 0 || pressed4 > 30) {
if (countdown_time <9999) {
countdown_time += 1 ;
}
dig = IntToDigits(countdown_time);
}
pressed4 += 1;
}
if (digitalRead(button3)==HIGH) {
pressed3=0;
}
if (digitalRead(button4)==HIGH) {
pressed4=0;
}
}
}
void loop(){
reset();
while (!Countdown(countdown_time,962)) {
reset();
}
while (digitalRead(button2)==1){};
}
Ülesanne 2 - RFID ja LCD I2C
I2C – SDA A4 ja SCL A5
//NR 3 - RFID, LCD
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <MFRC522.h>
#define SS_PIN 10
#define RST_PIN 9
MFRC522 rfid(SS_PIN, RST_PIN); // Create instance for RFID reader
LiquidCrystal_I2C lcd(0x3F, 16, 2); // Address 0x3F, 16 columns and 2 rows
// Define the custom character for LCD representing a chemistry set
byte chemistrySet[8] = {
B01110,
B11111,
B01110,
B01010,
B11011,
B11011,
B11011,
B01110
};
// Define the authorized RFID tags and their respective letters
struct Tag {
String name;
byte uid[4];
char letter;
};
Tag tags[] = {
{"TagRed", {0xD2, 0xbc, 0x52, 0x43}, 'O'},
{"TagYellow", {0x6a, 0x95, 0x51, 0x43}, 'F'},
{"TagGreen", {0x62, 0x35, 0x20, 0x1f}, 'H'},
{"TagBlue", {0x62, 0x65, 0x1f, 0x1f}, 'C'}
};
void setup() {
Serial.begin(9600);
SPI.begin(); // Initiate SPI bus
rfid.PCD_Init(); // Initiate RFID reader
lcd.init(); // Initiate LCD
lcd.backlight(); // Turn on backlight
lcd.createChar(0, chemistrySet); // Load custom character
}
void loop() {
// Look for new RFID cards
if (rfid.PICC_IsNewCardPresent() && rfid.PICC_ReadCardSerial()) {
String scannedUID = "";
for (byte i = 0; i < rfid.uid.size; i++) {
scannedUID += String(rfid.uid.uidByte[i], HEX);
}
Serial.print("Scanned UID: ");
Serial.println(scannedUID);
char letter = '\0';
// Compare scanned UID with each tag's UID
for (int i = 0; i < sizeof(tags) / sizeof(tags[0]); i++) {
bool match = true;
for (int j = 0; j < 4; j++) {
if (tags[i].uid[j] != rfid.uid.uidByte[j]) {
match = false;
break;
}
}
if (match) {
letter = tags[i].letter;
break;
}
}
lcd.clear();
lcd.setCursor(0, 0);
lcd.write(byte(0)); // Display custom character
lcd.write(byte(0));
lcd.write(byte(0));
lcd.write(byte(0));
lcd.write(byte(0));
lcd.setCursor(0, 1);
lcd.write(byte(0));
lcd.write(byte(0));
lcd.write(byte(0));
lcd.write(byte(0));
lcd.write(byte(0));
lcd.setCursor(6, 0);
lcd.print(letter); // Display letter on LCD
Serial.print("Letter displayed on LCD: ");
Serial.println(letter);
delay(2000);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Place RFID Tag:");
rfid.PICC_HaltA();
rfid.PCD_StopCrypto1();
}
}
