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--- pm:prj2023:apredescu:cyclocomputer [2023/05/07 12:17]
andrei.cioltan created
+++ pm:prj2023:apredescu:cyclocomputer [2023/05/29 22:22] (current)
andrei.cioltan [Software Design]
@@ Line 1: / Line 1: @@
-====== Nume proiect ======
+====== Cyclocomputer ======
-===== Introducere =====
 <note tip>
-Prezentarea pe scurt a proiectului vostru:
+ **Nume**: Cioltan Andrei Florin
-  * ce face
-  * care este scopul lui
+ **Grupa**: FILS 1221A
-  * care a fost ideea de la care aţi pornit
-  * de ce credeţi că este util pentru alţii şi pentru voi
 </note>
+===== Introducere =====
+ Proiectul consta in realizarea unui cyclocomputer care masoara cu ajutorul unui senzor de camp magnetic viteza de deplasare a unei biciclete, viteza medie si distanta totala.
+ Prin utilizarea unui buton se selecteaza dimensiunea rotii bicicletei. Un alt buton cicleaza printre cele doua moduri de functionare: standard si sprint. In modul standard se afiseaza pe ecran viteza curenta, viteza medie si distanta parcursa. Modul sprint functioneaza asemanator, dar in momentul in care viteza de deplasare scade sub un anumit punct, se aprinde un led, atentionand utilizatorul sa mareasca viteza.
 ===== Descriere generală =====
@@ Line 20: / Line 24: @@
 <note tip>
-Aici puneţi tot ce ţine de hardware design:
+Componente:
-  * listă de piese
+  * Arduino Nano
-  * scheme electrice (se pot lua şi de pe Internet şi din datasheet-uri, e.g. http://www.captain.at/electronic-atmega16-mmc-schematic.png)
+  * Ecran LCD 1602 IIC/I2C
-  * diagrame de semnal
+  * Senzor Magnetic(Hall)
-  * rezultatele simulării
+  * Buton push fara retinere, 7mm, 2 pini
+  * Led 5mm
+  * Rezistor 1kOhm
+  * PCB
 </note>
+{{ :pm:prj2023:apredescu:cioltan_andrei_hardware1.jpeg?800 |}}
+{{ :pm:prj2023:apredescu:cioltan_andrei_h2.jpeg?800 |}}
+{{ :pm:prj2023:apredescu:cioltan_andrei_h1.jpeg?800 |}}
 ===== Software Design =====
+<code>
+#include <LiquidCrystal_I2C.h> // Library for LCD
+#define LED 7
+#define B1 9
+#define B2 8
+#define reed 6
-<note tip>
+LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows
-Descrierea codului aplicaţiei (firmware):
+float radius = 13;// tire radius (in inches)
-  * mediu de dezvoltare (if any) (e.g. AVR Studio, CodeVisionAVR)
+int reedVal;
-  * librării şi surse 3rd-party (e.g. Procyon AVRlib)
+long timer = 0;// time between one full rotation (in ms)
-  * algoritmi şi structuri pe care plănuiţi să le implementaţi
+float kph = 00.00;
-  * (etapa 3) surse şi funcţii implementate
+float circumference;
-</note>
+int tire = 0;
+float lastSize = radius;
+int maxReedCounter = 100;//min time (in ms) of one rotation (for debouncing)
+int reedCounter;
+int mode = 1; // (1) --> normal mode; (-1) --> sprint mode
+int lastMode = 1;
+int number_of_modes = 2;
+int number_of_wheel_sizes = 3;
+int modeState;
+int wheelState;
+int old_button1_state = HIGH;
+int old_button2_state = HIGH;
+int totalReadings = 0;
+int MAXREADINGS = 100;
+float averageSpeed = 0;
+float lastAverageSpeed = 0;
+float totalDistanceTraveled = 0;
+float tireSizes[3] = {13, 13.75, 14.5};
+void setup(){
+  lcd.init(); //initialize the lcd
+  lcd.backlight(); //open the backlight
+  lcd.begin(16, 2);
+  pinMode(B1, INPUT_PULLUP);
+  pinMode(B2, INPUT_PULLUP);
+  pinMode(LED, OUTPUT);
+  pinMode(reed, INPUT);
+  reedCounter = maxReedCounter;
+  circumference = 2 * 3.14 * radius;
+  cli();//stop interrupts
+  //set timer1 interrupt at 1kHz
+  TCCR1A = 0;// set entire TCCR1A register to 0
+  TCCR1B = 0;// same for TCCR1B
+  TCNT1  = 0;
+  // set timer count for 1khz increments
+  OCR1A = 1999;// = (1/1000) / ((1/(16*10^6))*8) - 1
+  // turn on CTC mode
+  TCCR1B |= (1 << WGM12);
+  // Set CS11 bit for 8 prescaler
+  TCCR1B |= (1 << CS11);
+  // enable timer compare interrupt
+  TIMSK1 |= (1 << OCIE1A);
+  sei();//allow interrupts
+  //END TIMER SETUP
+  Serial.begin(9600);
+}
+ISR(TIMER1_COMPA_vect) {//Interrupt at freq of 1kHz
+  reedVal = digitalRead(reed);
+  int button1 = digitalRead(B1);
+  int button2 = digitalRead(B2);
+  if ((button1 == LOW) && (old_button1_state == HIGH) && (wheelState < number_of_wheel_sizes))
+  {
+    wheelState = wheelState + 1;
+    digitalWrite(LED, HIGH);
+    lastSize = tireSizes[tire];
+    tire++;
+    tire %= 3;
+    radius = tireSizes[tire];
+    circumference = 2 * 3.14 * radius;
+  }
+  else if ((button1 == LOW) && (old_button1_state == HIGH) && (wheelState > (number_of_wheel_sizes - 1)))
+  {
+    wheelState = 1;
+    digitalWrite(LED, HIGH);
+    lastSize = tireSizes[tire];
+    tire++;
+    tire %= 3;
+    radius = tireSizes[tire];
+    circumference = 2 * 3.14 * radius;
+  }
+  else {
+    digitalWrite(LED, LOW);
+  }
+  old_button1_state = button1;
+  if ((button2 == LOW) && (old_button2_state == HIGH) && (modeState < number_of_modes))
+  {
+    modeState = modeState + 1;
+    lastMode = mode;
+    mode *= -1;
+  }
+  else if ((button2 == LOW) && (old_button2_state == HIGH) && (modeState > (number_of_modes - 1)))
+  {
+    modeState = 1;
+    lastMode = mode;
+    mode *= -1;
+  }
+  old_button2_state = button2;
+  if(mode == -1 && kph <= 20) {
+    digitalWrite(LED, HIGH);
+  }
+  else {
+    digitalWrite(LED, LOW);
+  }
+  if (reedVal != 1){
+    if (reedCounter == 0){//min time between pulses has passed
+      //kph = (56.8 * float(circumference))/float(timer);//calculate miles per hour
+      //kph *= 1.60934;// calculate km per hour
+      kph = (3600 * (float(circumference) * 0.0254)) / float(timer);
+      totalDistanceTraveled += (circumference / 39370.07);
+      totalReadings++;
+      averageSpeed = (averageSpeed + kph) / 2;
+      if(totalReadings == MAXREADINGS) {
+        totalReadings = 1;
+        averageSpeed = kph;
+      }
+      timer = 0;//reset timer
+      reedCounter = maxReedCounter;
+    }
+    else{
+      if (reedCounter > 0){
+        reedCounter -= 1;
+      }
+    }
+  }
+  else{
+    if (reedCounter > 0){
+      reedCounter -= 1;
+    }
+  }
+  if (timer > 2000){
+    kph = 0;//if no new pulses from senzor - tire is still, set kph to 0
+  }
+  else{
+    timer += 1;//increment timer
+  }
+}
+void displayKPH(){
+  if(radius != lastSize) {
+    lcd.clear();
+    lcd.setCursor(0, 0);
+    lcd.print("Wheel Size ");
+    lcd.print(radius * 2);
+    delay(700);
+    lcd.clear();
+    lastSize = radius;
+    averageSpeed = 0;
+  }
+  if(mode != lastMode) {
+    lcd.clear();
+    lcd.setCursor(0, 0);
+    if(mode == 1)
+      lcd.print("Normal");
+    else
+      lcd.print("Sprint");
+    lcd.print(" Mode");
+    delay(700);
+    lcd.clear();
+    lastMode = mode;
+  }
+  lcd.setCursor(0, 0); // move cursor to   (0, 0)
+  lcd.print(kph);
+  if(kph < 10) {
+    lcd.setCursor(4, 0);
+    lcd.print(" ");
+  }
+  lcd.setCursor(6,0);
+  lcd.print("km/h");
+  lcd.setCursor(0, 1);
+  lcd.print(averageSpeed);
+  lcd.setCursor(6, 1);
+  lcd.print("km/h");
+  lcd.setCursor(12,0);
+  lcd.print(totalDistanceTraveled);
+  lcd.setCursor(14, 1);
+  lcd.print("km");
+  Serial.println(kph);
+}
+void loop(){
+  displayKPH();
+  delay(500);
+}
+</code>
 ===== Rezultate Obţinute =====
@@ Line 63: / Line 276: @@
 <note>
-Listă cu documente, datasheet-uri, resurse Internet folosite, eventual grupate pe **Resurse Software** şi **Resurse Hardware**.
+Listă cu documente, datasheet-uri, resurse Internet folosite:
+[[https://en.wikipedia.org/wiki/Cyclocomputer]]
+[[https://arduinogetstarted.com/tutorials/arduino-lcd-i2c]]
+[[https://sensorkit.joy-it.net/en/sensors/ky-024]]
 </note>
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