//Trying SPI example from Sparkfun

//#include <wiringPi.h>
#include <wiringPiSPI.h>
#include <unistd.h>
#include <iostream>
#include <errno.h>

using namespace std;

// LED Pin - wiringPi pin 0 is BCM_GPIO 17.
// we have to use BCM numbering when initializing with wiringPiSetupSys
// when choosing a different pin number please use the BCM numbering, also
// update the Property Pages - Build Events - Remote Post-Build Event command 
// which uses gpio export for setup for wiringPiSetupSys
#define	LED	17


// channel is the wiringPi name for the chip select (or chip enable) pin.
// Set this to 0 or 1, depending on how it's connected.
static const int CHANNEL = 0;

int main(void)
{
	//wiringPiSetupSys();

	//pinMode(LED, OUTPUT);

	int fd, result;
	//unsigned char buffer[100];
	unsigned char buffer[100];

	cout << "Initializing" << endl;
	printf("Initializing\n");

	// Configure the interface.
	// CHANNEL insicates chip select,
	// 500000 indicates bus speed.
	fd = wiringPiSPISetup(CHANNEL, 5000000); //was 500000

	cout << "Init result: " << fd << endl;
	printf("Init result: %d\n",fd);

	for (;;)
	{
		// clear display
		buffer[0] = 0xB5;
		buffer[1] = 0xC6;
		buffer[2] = 0xD7;
		buffer[3] = 0xE8;
		wiringPiSPIDataRW(CHANNEL, buffer, 4);
		usleep(100000);
		int SpiIn = (int)(buffer[0] << 24 | buffer[1] << 16 | buffer[2] << 8 | buffer[3]);
		printf("Spi Input %Xh\n", SpiIn);
	}
}