/* respond.cpp
 *
 *  Created on: Mar 3, 2015, 31 Mar 2015
 *      Authors: Walter Schilling, Josiah Yoder
 */
#include <iostream>
#include <unistd.h>
#include <cstdlib>
#include "GPIO.h"

using namespace exploringBB;
using namespace std;

/**
 * This program responds to interrupts using Derek Malloy's GPIO.h & .cpp 
 */
int main(int argc, char* argv[]) {
	// Check to determine if the command line usage is correct or not.
	if (argc <= 3) {
		cerr << "Usage: " << argv[0] << " <GPIO IN> <GPIO OUT> <Number Of Blinks>"<<endl;
		exit(-1);
	}

	// Instantiate a new instance of a GPIO port.
	int inputNumber = atoi(argv[1]);
	GPIO inputGPIO(inputNumber);
	int outputNumber = atoi(argv[2]);
	GPIO outGPIO(outputNumber);

	// Determine the blink count.
	int blinkCount = atoi(argv[3]);

	// Set the data direction register for output.  This will enable one 
        // to drive the pin as is necessary.
	outGPIO.setDirection(OUTPUT);
	inputGPIO.setDirection(INPUT);

	// Loop over the data, turning things on and off as is necessary.
	for (int index = 0; index < blinkCount; index++) {
		inputGPIO.setEdgeType(RISING);
		cout << "Waiting for RISING edge on " << inputNumber << endl;
		inputGPIO.waitForEdge();
		cout << "Setting output " << outputNumber << " HIGH " << endl;
		outGPIO.setValue(HIGH);

		inputGPIO.setEdgeType(FALLING);
		cout << "Waiting for FALLING edge on " << inputNumber << endl;
		inputGPIO.waitForEdge();
		cout << "Setting output " << outputNumber << " LOW " << endl;
		outGPIO.setValue(LOW);
	}
}