mcp3002.cpp

#include <wiringPiSPI.h>
#include <iostream>

using namespace std;

int customAnalogRead(int spiPort)
{
  unsigned char spiData[2];
	spiData[0] = 0b11110000;
	spiData[1] = 0;
	wiringPiSPIDataRW(spiPort,spiData,2);
	return ((spiData[0] << 7) | (spiData[1] >> 1)) & 0x3FF;
}

int main()
{
  const auto port = 0;
  wiringPiSPISetup (port, 1000000);
  cout << customAnalogRead(port);
  return 0;
}