// Sample3Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "Sample3.h"
#include "Sample3Dlg.h"
#include <math.h>

#include "AIOUSB.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

const double Pi = 3.1415926535897932384626433832795;
unsigned long DeviceIndex;

/////////////////////////////////////////////////////////////////////////////
// CSample3Dlg dialog

CSample3Dlg::CSample3Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSample3Dlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CSample3Dlg)
	m_BlurbText = _T("");
	//}}AFX_DATA_INIT
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CSample3Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CSample3Dlg)
	DDX_Control(pDX, IDC_GOBUTTON, m_GoButton);
	DDX_Text(pDX, IDC_BLURBSTATIC, m_BlurbText);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CSample3Dlg, CDialog)
	//{{AFX_MSG_MAP(CSample3Dlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_GOBUTTON, OnGoButtonClick)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSample3Dlg message handlers

BOOL CSample3Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	unsigned long Status, PID;

	//This simply tries diOnly, instead of trying to detect a board by using GetDevices() and looping over QueryDeviceInfo().
	DeviceIndex = diOnly;
	Status = QueryDeviceInfo(DeviceIndex, &PID, NULL, NULL, NULL, NULL);

	if ( Status == ERROR_FILE_NOT_FOUND )
		m_BlurbText = "No device found. Make sure the board is plugged in, and check Device Manager to see if it has an error or is stuck with a (D15 Lo) tag.";
	else if (Status == ERROR_DUP_NAME )
		m_BlurbText = "Multiple devices found. This sample only works with one.";
	else if ( Status != ERROR_SUCCESS )
	{
		char Buf[256];
		sprintf(Buf, "Error %d detecting devices.", Status);
		m_BlurbText = Buf;
	}
	else if ( ! (PID == 0x4002) )
		m_BlurbText = "A device was detected, but not one supported by this sample.";
	else
	{
		m_BlurbText = "This sample uses a single DACOutputProcess() call to control the arbitrary waveform generator. "
		               "The data loops sine waves, with a different frequency on each DAC, from 10 Hz to 80 Hz. "
		               "Click Go when ready.\r\n\r\n"
		;
		m_GoButton.EnableWindow(TRUE);
	}
	UpdateData(FALSE);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CSample3Dlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

HCURSOR CSample3Dlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CSample3Dlg::OnGoButtonClick() 
{
	const DACDataLen = 80000;
	PWORD DACData;
	unsigned long Status;
	int I, Channel;
	double ClockHz, F;
	int ChannelTheta[8];

	ClockHz = 10000; //Each tick of the clock outputs all DAC channels in parallel.
	//At 10000 Hz, DAC 0 will be 10 Hz, DAC 1 will be 20 Hz, DAC 2 will be 30 Hz, etc.
	for ( I = 0; I <= 7; ++I ) ChannelTheta[I] = 0;
	DACData = PWORD(malloc(80000 * sizeof(DACData[0])));
	for ( I = 0; I < DACDataLen; ++I )
	{

		Channel = I % 8;
		ChannelTheta[Channel] = (ChannelTheta[Channel] + (1 + Channel)) % 1000;
		F = Pi * 2 / 1000.0 * ChannelTheta[Channel]; //Convert theta from integer permille to float radians.
		F = 0xFFF / 2.0 * (sin(F) + 1); //Convert from ±1 to 0-FFF.
		DACData[I] = WORD(F); //Round and store.

		if ( Channel == 7 ) DACData[I] |= 0x2000; //If it's the last channel, set the End-Of-DACs bit.

	}
	I = DACDataLen - 1;
	DACData[I] |= 0x1000; //Set the Loop bit on the last sample of the whole pattern.

	m_BlurbText += "Loading...\r\n";
	UpdateData(FALSE);
	Status = DACOutputProcess(DeviceIndex, &ClockHz, DACDataLen, &DACData[0]);

	if ( Status == ERROR_SUCCESS )
		m_BlurbText += "Now running; you can close this sample and it will keep running. Check it out with a scope.\r\n";
	else
		m_BlurbText += "Error ' + IntToStr(Status) + ' from DACOutputProcess.\r\n"
	;
	UpdateData(FALSE);
}