import time
import utime
from machine import Pin
time.sleep(0.1) # Wait for USB to become ready

int IRreceivePin           = 12;     #// The pin that incoming IR signals are read from
int IRreceive2Pin          = 11;     #// Allows for checking external sensors are attached as well as distinguishing between sensor locations (eg spotting head shots)


#//Incoming signal Details
int received[18];                    #// Received data: received[0] = which sensor, received[1] - [17] byte1 byte2 parity (Miles Tag structure)


print("Hello, Pi Pico tag!")
void setup() {
  // put your setup code here, to run once:
  Serial1.begin(115200);
  Serial1.println("Hello, Raspberry Pi Pico W!");
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(1); // this speeds up the simulation
}

void receiveIR() { #// Void checks for an incoming signal and decodes it if it sees one.
  int error = 0;

  if(digitalRead(IRreceivePin) == LOW){    #// If the receive pin is low a signal is being received.
    digitalWrite(hitPin,HIGH);
    if(digitalRead(IRreceive2Pin) == LOW){ #// Is the incoming signal being received by the head sensors?
      received[0] = 1;
    }
    else{
      received[0] = 0;
    }

    while(digitalRead(IRreceivePin) == LOW){
    }
    for(int i = 1; i <= 17; i++) {                        #// Repeats several times to make sure the whole signal has been received
      received[i] = pulseIn(IRreceivePin, LOW, timeOut);  #// pulseIn command waits for a pulse and then records its duration in microseconds.
    }

    Serial.print("sensor: ");                            #// Prints if it was a head shot or not.
    Serial.print(received[0]); 
    Serial.print("...");

    for(int i = 1; i <= 17; i++) {  #// Looks at each one of the received pulses
      int receivedTemp[18];
      receivedTemp[i] = 2;
      if(received[i] > (IRpulse - 200) &&  received[i] < (IRpulse + 200)) {receivedTemp[i] = 0;}                      #// Works out from the pulse length if it was a data 1 or 0 that was received writes result to receivedTemp string
      if(received[i] > (IRpulse + IRpulse - 200) &&  received[i] < (IRpulse + IRpulse + 200)) {receivedTemp[i] = 1;}  #// Works out from the pulse length if it was a data 1 or 0 that was received  
      received[i] = 3;                   #// Wipes raw received data
      received[i] = receivedTemp[i];     #// Inputs interpreted data

      Serial.print(" ");
      Serial.print(received[i]);         // Print interpreted data results
    }
    Serial.println("");                  // New line to tidy up printed results

    // Parity Check. Was the data received a valid signal?
    check = 0;
    for(int i = 1; i <= 16; i++) {
      if(received[i] == 1){check = check + 1;}
      if(received[i] == 2){error = 1;}
    }
    // Serial.println(check);
    check = check >> 0 & B1;
    // Serial.println(check);
    if(check != received[17]){error = 1;}
    if(error == 0){Serial.println("Valid Signal");}
    else{Serial.println("ERROR");}
    if(error == 0){interpritReceived();}
    digitalWrite(hitPin,LOW);
  }
}