my first commit

code/arduino/vent/vent.ino

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+
+#include <Wire.h> // I2C library
+// Outputs:
+int epr1 = 3;// PWM for Electronic Pressure Regulator 1 - Air 
+int epr2 = 5;// PWM for Electronic Pressure Regulator 2 - Oxygen
+int buzzer = 6;// PWM for Buzzer
+int ev1 = 2;// Electric Valve 1
+int ev2 = 4;// Electric Valve 2
+int address_flow_sensor = 73; // (0x49)
+
+
+// Inputs:
+int power_reference = A4;//Power detection
+int sensor_a = A0;// Pressure of tank 
+int sensor_epr1 = A1;// Pressure sensor on Electronic Pressure Regulator 1 - Air
+int sensor_epr2 = A2; // Pressure sensor on Electronic Pressure Regulator 2 - Oxygen
+int sensor_b = A3;// Input pressure 
+int sensor_c = A5;// Pressure sensor on exhalation 
+
+//Variables
+int start_var = 0;
+bool stringComplete = false; 
+int flow_meter_read = 0;
+
+//Variables fro receiving data from USB:
+String inputString = ""; 
+String temp = "";
+String volumeString = "";
+String breathString = "";
+String peepString = "";
+String ratioString = "";
+String oxygenString = "";
+String alarmString = "";
+String temp_string = "";
+
+//Variables for setting outputs:
+int epr1_presssure = 0;
+int epr2_presssure = 0;
+
+//Misc Variables:
+int a = 0;
+int volume = 0;
+int breath = 12;
+int peep = 5;
+int ratio = 1;
+int oxygen = 21;
+int alarm = 30;
+int lenght = 0;
+
+void setup() {
+  // Declare pins an OUTPUT:
+  pinMode(epr1, OUTPUT);
+  pinMode(epr2, OUTPUT);
+  pinMode(buzzer, OUTPUT);
+  pinMode(ev1, OUTPUT);
+  pinMode(ev2, OUTPUT);
+
+
+
+  // Declare pins an INPUT:
+  pinMode(power_reference, INPUT);//Power detection
+  pinMode(sensor_a, INPUT);//Air pressure in Tank 
+  pinMode(sensor_epr1, INPUT);//Air pressure
+  pinMode(sensor_epr2, INPUT);//Oxygen pressure
+  pinMode(sensor_b, INPUT);//Input pressure
+  pinMode(sensor_c, INPUT);//Exhale pressure
+
+  digitalWrite(ev1, LOW); //Close Valve 1
+  digitalWrite(ev2, HIGH); //Open Valve 2
+
+
+  // Comm setup:
+  Wire.begin();// join i2c bus (address optional for master)
+  Serial.begin(9600);// start Serial for output
+  //incoming_data.reserve(200);
+
+
+}
+
+
+
+//Main program
+void loop() {
+  Serial.print("-O:");//ERP1 Reading
+  Serial.print(analogRead(sensor_epr1));
+  Serial.print(",");
+  Serial.print("-T:");//ERP2 Reading
+  Serial.print(analogRead(sensor_epr2));
+  Serial.print(",");
+  Serial.print("-A:");//Sensor A reading
+  Serial.print(((analogRead(sensor_a))-40)/2.58);
+  Serial.print("-B:");//Sensor B reading
+  Serial.print(analogRead(sensor_b));
+  Serial.print("-C:");//Sensor C reading
+  Serial.print(analogRead(sensor_c));
+  Serial.print("-F:");//Flow reading
+  Serial.print(flow_meter_read);
+  Serial.print("-P:");//Power reference (to detect if power goes down).
+  Serial.print(analogRead(power_reference));
+  Serial.println(",");
+
+
+  serialEvent();
+ if (stringComplete) {
+
+    temp = inputString.charAt(0); 
+    lenght = inputString.length();
+    volumeString ="";
+    breathString = "";
+    peepString = "";
+    ratioString = "";
+    oxygenString = "";
+    alarmString = "";
+
+    if (temp == "v") {
+      for (int i = 1; i <= lenght; i = i + 1){
+        temp_string = inputString.charAt(i);
+        volumeString += temp_string;
+      }
+      volume = volumeString.toInt();  
+      Serial.println(volume);
+    }
+    else if (temp == "b") {
+      for (int i = 1; i <= lenght; i = i + 1){
+        temp_string = inputString.charAt(i);
+        breathString += temp_string;
+      }
+      breath = breathString.toInt();  
+      Serial.println(breath);
+    }
+    else if (temp == "p") {
+      for (int i = 1; i <= lenght; i = i + 1){
+        temp_string = inputString.charAt(i);
+        peepString += temp_string;
+      }
+      peep = peepString.toInt();  
+      Serial.println(peep);
+    }
+     else if (temp == "o") {
+      for (int i = 1; i <= lenght; i = i + 1){
+        temp_string = inputString.charAt(i);
+        oxygenString += temp_string;
+      }
+      oxygen = oxygenString.toInt();  
+      Serial.println(oxygen);
+    }
+    else if (temp == "r") {
+      for (int i = 1; i <= lenght; i = i + 1){
+        temp_string = inputString.charAt(i);
+        ratioString += temp_string;
+      }
+      ratio = ratioString.toInt();  
+      Serial.println(ratio);
+    }
+    else if (temp == "a") {
+      for (int i = 1; i <= lenght; i = i + 1){
+        temp_string = inputString.charAt(i);
+        alarmString += temp_string;
+      }
+      alarm = alarmString.toInt();  
+      Serial.println(alarm);
+    }    
+    // clear the string:
+    inputString = "";
+    stringComplete = false;
+
+
+  }
+
+  digitalWrite(ev1, HIGH); //Open Valve 1
+  digitalWrite(ev2, LOW); //Close Valve 2 
+  analogWrite(epr1, volume);  
+  int time_ratio = (((60/breath)/(1+ratio))*60)/2.85;
+  for (int bal = 0; bal < time_ratio; bal = bal + 1) {
+    Serial.print("-O:");//ERP1 Reading
+    Serial.print(analogRead(sensor_epr1));
+    Serial.print(",");
+    Serial.print("-T:");//ERP2 Reading
+    Serial.print(analogRead(sensor_epr2));
+    Serial.print(",");
+    Serial.print("-A:");//Sensor A reading
+     Serial.print(((analogRead(sensor_a))-40)/2.58);
+    Serial.print("-B:");//Sensor B reading
+    Serial.print(analogRead(sensor_b));
+    Serial.print("-C:");//Sensor C reading
+    Serial.print(analogRead(sensor_c));
+    Serial.print("-F:");//Flow reading
+    Serial.print(flow_meter_read);
+    Serial.print("-P:");//Power reference (to detect if power goes down).
+    Serial.print(analogRead(power_reference));
+    Serial.println(",");
+    serialEvent();
+    delay(1);
+
+  }
+  analogWrite(epr1, 0);  
+  digitalWrite(ev2, HIGH); //Open Valve 2 
+    int comp = time_ratio*ratio;
+    for (int dela = 0; dela < comp; dela = dela + 1) {
+    Serial.print("-O:");//ERP1 Reading
+    Serial.print(analogRead(sensor_epr1));
+    Serial.print(",");
+    Serial.print("-T:");//ERP2 Reading
+    Serial.print(analogRead(sensor_epr2));
+    Serial.print(",");
+    Serial.print("-A:");//Sensor A reading
+     Serial.print(((analogRead(sensor_a))-40)/2.58);
+    Serial.print("-B:");//Sensor B reading
+    Serial.print(analogRead(sensor_b));
+    Serial.print("-C:");//Sensor C reading
+    Serial.print(analogRead(sensor_c));
+    Serial.print("-F:");//Flow reading
+    Serial.print(flow_meter_read);
+    Serial.print("-P:");//Power reference (to detect if power goes down).
+    Serial.print(analogRead(power_reference));
+    Serial.println(",");
+    serialEvent();
+    delay(1);
+
+  }
+ }
+
+
+
+
+
+void serialEvent() {
+  while (Serial.available()) {
+    // get the new byte:
+    char inChar = (char)Serial.read();
+    // add it to the inputString:
+    inputString += inChar;
+    // if the incoming character is a newline, set a flag so the main loop can
+    // do something about it:
+    if (inChar == '\n') {
+      stringComplete = true;
+    }
+  }
+}
+
+
+int read_flow(int address) {
+  //start the communication with IC with the address 73
+  Wire.beginTransmission(address); 
+  //send a bit and ask for register zero
+  Wire.write(0);
+  //end transmission
+  Wire.endTransmission();
+  //request 1 byte from address 73
+  Wire.requestFrom(address, 1);
+  //wait for response
+  while(Wire.available() == 0);
+  //put the temperature in variable c
+  int cs = Wire.read();   
+  return cs;
+}
+
+
+
+
+
+