config.h

#ifdef _VARIANT_ARDUINO_DUE_X_
#define DUT
#define PIN_IRQ 9
#define PIN_ACK 10
#else
#define PIN_IRQ 10
#define PIN_ACK 9
#endif

DUE_test_PR3524.ino

// test for DUE PR 3524

// connection: 
// 18 (dut) -> 0 (tester)
// 19 -> 1
// 2 -> A0  -> test1
// 3 -> A1  -> test2
// 4 -> 4   -> test3
// A0 -> 5  -> test4
// 5 -> 6   -> test5
// 6 -> x   -> test6
// 7 -> 7   -> test7
// 8 -> 8   -> test7
// 9 -> 9   -> irq test
// 10 -> 10   -> irq dut

#include "config.h"

volatile bool can_continue = false;

void confirm() {
  delay(10);
  digitalWrite(PIN_ACK, LOW);
  delay(1);
  digitalWrite(PIN_ACK, HIGH);
  can_continue = false;
  //SerialUSB.println("confirm");
}

void wait() {
  //SerialUSB.println("wait");
  while (can_continue == false) {};
  //noInterrupts();
  can_continue = false;
  //interrupts();
}

void flushSerialIn() {
  //SerialUSB.print("BUF:");
  while (Serial1.available()) {
    Serial1.read();  
  }
}

void flushSerialIn(bool a) {
  if (a) {
    while (Serial1.available()) {
      SerialUSB.print((char)Serial1.read());  
    }
  } else {
      flushSerialIn();
  }
}

void unlock() {
  can_continue = true;
}

void sync() {
#ifdef DUT
  confirm();
  wait();
#else
  wait();
  confirm();
#endif  
}

void setup() {
  // put your setup code here, to run once:
  Serial1.begin(115200);
  Serial.begin(115200);
  pinMode(PIN_ACK, OUTPUT);
  digitalWrite(PIN_ACK, HIGH);
  pinMode(PIN_IRQ, INPUT_PULLUP);
  while (Serial1.find("c") == false) {
    Serial1.println("c");
    SerialUSB.println("waiting");
    SerialUSB.println(Serial1.read());
    delay(100);
  }
  Serial1.println("c");
  delay(4000);
  attachInterrupt(PIN_IRQ, unlock, FALLING);
  delay(1000);
  SerialUSB.println("start");
}

void loop() {
  flushSerialIn();
  // put your main code here, to run repeatedly:
#ifndef DUT
  #pragma message ( "Compiling for Zero as Tester" )
  resultIssue1(A0);
  resultIssue2(A1);
  resultIssue3(4);
  resultIssue4(5);
  resultIssue5(6);
  resultIssue6(A0);
  resultIssue7(7, 8);
#else
  #pragma message ( "Compiling for DUE as DUT" )
  testIssue1(2);
  testIssue2(3);
  testIssue3(4);
  testIssue4(A0);
  testIssue5(5);
  testIssue6(6);
  testIssue7(7,8);
#endif
}

void testIssue1(int pin) {
  sync();
  SerialUSB.println("start test 1");
  pinMode(pin, OUTPUT);
  analogWrite(pin, 128);
  sync();
  delay(100);
  digitalWrite(pin, HIGH);
  sync();
  delay(100);
  digitalWrite(pin, LOW);
  sync();
  sync();
}

void resultIssue1(int pin) {
  sync();
  SerialUSB.println("results for test 1");
  pinMode(pin, INPUT);
  sync();
  delay(10);
  SerialUSB.println(pulseIn(pin,LOW) <= 500 && pulseIn(pin,LOW) >= 480);
  sync();
  delay(10);
  SerialUSB.println(digitalRead(pin) == HIGH);
  sync();
  delay(10);
  SerialUSB.println(digitalRead(pin) == LOW);
  sync();
}

void testIssue2(int pin) {
  sync();
  SerialUSB.println("start test 2");
  pinMode(pin, OUTPUT);
  analogWrite(pin, 128);
  sync();
  delay(100);
  pinMode(pin, OUTPUT);
  analogWrite(pin, 20);
  sync();
  delay(100);
  sync();
  digitalWrite(pin, LOW);
}

void resultIssue2(int pin) {
  sync();
  SerialUSB.println("results for test 2");
  pinMode(pin, INPUT);
  sync();
  SerialUSB.println(pulseIn(pin,LOW) <= 500 && pulseIn(pin,LOW) >= 480);
  sync();
  SerialUSB.println(pulseIn(pin,LOW) <= 930 && pulseIn(pin,LOW) >= 910);
  sync();
}

void testIssue3(int pin) {
  sync();
  SerialUSB.println("start test 3");
  pinMode(pin, OUTPUT);
  digitalWrite(pin, HIGH);
  sync();
  delay(100);
  pinMode(pin, INPUT);
  sync();
  delay(100);
  Serial1.println(digitalRead(pin));
  sync();
  delay(100);
  Serial1.println(digitalRead(pin));
  sync();
}

void resultIssue3(int pin) {
  sync();
  SerialUSB.println("starting test 3");
  flushSerialIn();
  sync();
  pinMode(pin, INPUT);
  SerialUSB.println(digitalRead(pin));
  pinMode(pin, OUTPUT);
  digitalWrite(pin, HIGH);
  sync();
  SerialUSB.println(Serial1.find("1"));
  flushSerialIn();
  sync();
  digitalWrite(pin, LOW);
  SerialUSB.println(Serial1.find("0"));
  flushSerialIn();
  sync();
}

void testIssue4(int pin) {
  sync();
  SerialUSB.println("start test 4");
  pinMode(pin, INPUT);
  sync();
  Serial1.println(analogRead(pin));
  SerialUSB.println(analogRead(pin));
  sync();
  delay(100);
  Serial1.println(digitalRead(pin));
  sync();
}

void resultIssue4(int pin) {
  sync();
  SerialUSB.println("results for test 4");
  pinMode(pin, OUTPUT);
  digitalWrite(pin, HIGH);
  flushSerialIn();
  sync();
  delay(100);
  flushSerialIn(true);
  //SerialUSB.println(Serial1.find("102")); //1020 or higher
  sync();
  SerialUSB.println(Serial1.find("1"));
  flushSerialIn();
  sync();
}

void testIssue5(int pin) {
  sync();
  SerialUSB.println("start test 5");
  pinMode(pin, OUTPUT);
  sync();
  sync();
}

void resultIssue5(int pin) {
  sync();
  SerialUSB.println("results for test 5");
  pinMode(pin, INPUT);
  sync();
  delay(100);
  SerialUSB.println(digitalRead(pin) == 0);
  sync();
}

void testIssue6(int pin) {
  sync();
  SerialUSB.println("start test 6");
  pinMode(pin, OUTPUT);
  Serial1.println(digitalRead(pin));
  delay(100);
  sync();
  delay(100);
}

void resultIssue6(int pin) {
  flushSerialIn();
  sync();
  SerialUSB.println("results for test 6");
  SerialUSB.println(Serial1.find("0"));
  sync();
}

void testIssue7(int pin, int pin2) {
  sync();
  SerialUSB.println("start test 7");
  sync();
  digitalWrite(pin, HIGH);
  pinMode(pin, OUTPUT);
  sync();
  digitalWrite(pin2, LOW);
  pinMode(pin2, OUTPUT);
  sync();
}

void resultIssue7(int pin, int pin2) {
  sync();
  SerialUSB.println("results for test 7");
  pinMode(pin, INPUT);
  sync();
  SerialUSB.println(digitalRead(pin) == HIGH);
  pinMode(pin2, INPUT);
  sync();
  SerialUSB.println(digitalRead(pin2) == LOW);
  sync();
}