// floatconvDlg.cpp : implementation file // #include "stdafx.h" #include "floatconv.h" #include "floatconvDlg.h" #include "math.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CAboutDlg dialog used for App About class CAboutDlg : public CDialog { public: CAboutDlg(); // Dialog Data //{{AFX_DATA(CAboutDlg) enum { IDD = IDD_ABOUTBOX }; //}}AFX_DATA // ClassWizard generated virtual function overrides //{{AFX_VIRTUAL(CAboutDlg) protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support //}}AFX_VIRTUAL // Implementation protected: //{{AFX_MSG(CAboutDlg) //}}AFX_MSG DECLARE_MESSAGE_MAP() }; CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD) { //{{AFX_DATA_INIT(CAboutDlg) //}}AFX_DATA_INIT } void CAboutDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CAboutDlg) //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CAboutDlg, CDialog) //{{AFX_MSG_MAP(CAboutDlg) // No message handlers //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CFloatconvDlg dialog CFloatconvDlg::CFloatconvDlg(CWnd* pParent /*=NULL*/) : CDialog(CFloatconvDlg::IDD, pParent) { //{{AFX_DATA_INIT(CFloatconvDlg) m_Byte1Str = _T(""); m_Byte2Str = _T(""); m_Byte3Str = _T(""); m_Byte4Str = _T(""); m_FloatFormat = -1; m_Exp = 0; m_Mant = _T(""); m_Float = _T(""); m_Note = _T(""); m_Info = _T(""); //}}AFX_DATA_INIT // Note that LoadIcon does not require a subsequent DestroyIcon in Win32 m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME); } void CFloatconvDlg::DoDataExchange(CDataExchange* pDX) { CDialog::DoDataExchange(pDX); //{{AFX_DATA_MAP(CFloatconvDlg) DDX_Control(pDX, IDC_BYTE4, m_Byte4Control); DDX_Text(pDX, IDC_BYTE1, m_Byte1Str); DDV_MaxChars(pDX, m_Byte1Str, 2); DDX_Text(pDX, IDC_BYTE2, m_Byte2Str); DDV_MaxChars(pDX, m_Byte2Str, 2); DDX_Text(pDX, IDC_BYTE3, m_Byte3Str); DDV_MaxChars(pDX, m_Byte3Str, 2); DDX_Text(pDX, IDC_BYTE4, m_Byte4Str); DDV_MaxChars(pDX, m_Byte4Str, 2); DDX_Radio(pDX, IDC_RADIOHT24, m_FloatFormat); DDX_Text(pDX, IDC_EXP, m_Exp); DDX_Text(pDX, IDC_MANT, m_Mant); DDX_Text(pDX, IDC_FLOAT, m_Float); DDX_Text(pDX, IDC_NOTE, m_Note); DDX_Text(pDX, IDC_INFO, m_Info); //}}AFX_DATA_MAP } BEGIN_MESSAGE_MAP(CFloatconvDlg, CDialog) //{{AFX_MSG_MAP(CFloatconvDlg) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() ON_BN_CLICKED(IDC_B2F, OnB2f) ON_BN_CLICKED(IDC_F2B, OnF2b) ON_EN_MAXTEXT(IDC_BYTE1, OnMaxtextByte1) ON_BN_CLICKED(IDC_RADIOHT24, OnHT24) ON_BN_CLICKED(IDC_RADIOIEEE32, OnIEEE32) ON_BN_CLICKED(IDC_RADIOMCHIP24, OnMCHIP24) ON_BN_CLICKED(IDC_RADIOMCHIP32, OnMCHIP32) //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CFloatconvDlg message handlers BOOL CFloatconvDlg::OnInitDialog() { CDialog::OnInitDialog(); // Add "About..." menu item to system menu. // IDM_ABOUTBOX must be in the system command range. ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE); if (pSysMenu != NULL) { CString strAboutMenu; strAboutMenu.LoadString(IDS_ABOUTBOX); if (!strAboutMenu.IsEmpty()) { pSysMenu->AppendMenu(MF_SEPARATOR); pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu); } } // Set the icon for this dialog. The framework does this automatically // when the application's main window is not a dialog SetIcon(m_hIcon, TRUE); // Set big icon SetIcon(m_hIcon, FALSE); // Set small icon // TODO: Add extra initialization here m_FloatFormat = 0; // hitech m_Note = "Note:"; /* m_Info = "Hitech C compiler, ref. Hitech C Compiler manual p81\n"\ "SEEE EEEE EMMM MMMM MMMM MMMM\n"\ "S sign, E exponent, M mantissa\n";*/ if (!m_Info.LoadString(IDS_HITECH24)) m_Info = "Hitech info string not found"; m_Byte1Str = "0"; m_Byte2Str = "0"; m_Byte3Str = "0"; m_Byte4Str = "0"; m_Byte4Control.SetReadOnly(TRUE); m_Float = "0"; UpdateData(FALSE); return TRUE; // return TRUE unless you set the focus to a control } void CFloatconvDlg::OnSysCommand(UINT nID, LPARAM lParam) { if ((nID & 0xFFF0) == IDM_ABOUTBOX) { CAboutDlg dlgAbout; dlgAbout.DoModal(); } else { CDialog::OnSysCommand(nID, lParam); } } // 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 CFloatconvDlg::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(); } } // The system calls this to obtain the cursor to display while the user drags // the minimized window. HCURSOR CFloatconvDlg::OnQueryDragIcon() { return (HCURSOR) m_hIcon; } void CFloatconvDlg::OnB2f() { double mantissa=0; int biased_exponent=0; char *endstr; BYTE Byte1, Byte2, Byte3, Byte4; endstr = "\0"; // used by strtoul function UpdateData(TRUE); // load user values Byte1 = (BYTE)strtoul(m_Byte1Str, &endstr, 16); Byte2 = (BYTE)strtoul(m_Byte2Str, &endstr, 16); Byte3 = (BYTE)strtoul(m_Byte3Str, &endstr, 16); Byte4 = (BYTE)strtoul(m_Byte4Str, &endstr, 16); m_Note = "Note:"; // what format are we using? switch (m_FloatFormat) { case 0 : // Hitech 24bit (truncated IEEE 32bit, bias 127, but no Inf or NaN) biased_exponent = ((Byte1 & 0x7F) << 1) + ((Byte2 & 0x80) >> 7); m_Exp = biased_exponent - 127; // removing bias // 15 is number of bits in mantissa, thus the 15 bit right shift mantissa = ((double)(((Byte2 & 0x7F) << 8) + Byte3)) / pow(2, 15) + 1.0; // sign bit set? if (Byte1 & 0x80) mantissa *= -1; if ((Byte1 + Byte2 + Byte3) == 0) { // special case, all zeroes m_Float = "0"; m_Mant.Format("%1.12G", mantissa); m_Note = "Note: Special Case - All bytes are zero"; } else { // output for user m_Mant.Format("%1.12G", mantissa ); m_Float.Format("%1.12G", mantissa * pow(2.0, (double)m_Exp)); } break; case 1 : // IEEE754 32bit biased_exponent = ((Byte1 & 0x7F) << 1) + ((Byte2 & 0x80) >> 7); m_Exp = biased_exponent - 127; // removing bias // 23 is number of bits in mantissa, thus the 23 bit right shift mantissa = ((double)(((Byte2 & 0x7F) << 16) + (Byte3 << 8) + Byte4)) / pow(2, 23) + 1.0; // sign bit set? if (Byte1 & 0x80) mantissa *= -1; if ((Byte1 + Byte2 + Byte3 + Byte4) == 0) { // special case, all zeroes m_Float = "0"; m_Mant.Format("%1.12G", mantissa); m_Note = "Note: Special Case - All bytes are zero"; } else if ((biased_exponent == 0xFF) && ((((Byte2 & 0x7F) << 16) + (Byte3 << 8) + Byte4) == 0x000000)) { // this is also infinity m_Note = "Note: Special Case - Infinity"; } else if ((biased_exponent == 0xFF) && ((((Byte2 & 0x7F) << 16) + (Byte3 << 8) + Byte4) != 0x000000)) { // not a number m_Note = "Note: Special Case - Not A Number (NaN)"; } else { // output for user m_Mant.Format("%1.12G", mantissa ); m_Float.Format("%1.12G", mantissa * pow(2, m_Exp)); } break; case 2 : // Microchip 32Bit biased_exponent = Byte1; m_Exp = biased_exponent - 127; // removing bias // 23 is number of bits in mantissa, thus the 23 bit right shift mantissa = ((double)(((Byte2 & 0x7F) << 16) + (Byte3 << 8) + Byte4)) / pow(2, 23) + 1.0; // sign bit set? if (Byte2 & 0x80) mantissa *= -1; if ((Byte1 + Byte2 + Byte3 + Byte4) == 0) { // special case, all zeroes m_Float = "0"; m_Mant.Format("%1.12G", mantissa); m_Note = "Note: Special Case - All bytes are zero"; } else { // output for user m_Mant.Format("%1.12G", mantissa ); m_Float.Format("%1.12G", mantissa * pow(2, m_Exp)); } break; case 3 : // Microchip 24bit biased_exponent = Byte1; m_Exp = biased_exponent - 127; // removing bias // 15 is number of bits in mantissa, thus the 15 bit right shift mantissa = ((double)(((Byte2 & 0x7F) << 8) + Byte3)) / pow(2, 15) + 1.0; // sign bit set? if (Byte2 & 0x80) mantissa *= -1; if ((Byte1 + Byte2 + Byte3) == 0) { // special case, all zeroes m_Float = "0"; m_Mant.Format("%1.12G", mantissa); m_Note = "Note: Special Case - All bytes are zero"; } else { // output for user m_Mant.Format("%1.12G", mantissa ); m_Float.Format("%1.12G", mantissa * pow(2, m_Exp)); } break; default: break; } // switch (m_FloatFormat) UpdateData(FALSE); } void CFloatconvDlg::OnF2b() { double x, z, UserFloat=0; unsigned long mantissa=0; int e, k; char *endstr, sign; BYTE Byte1, Byte2, Byte3, Byte4, be; endstr = "\0"; // used by strtod function UpdateData(TRUE); // load user values UserFloat = strtod(m_Float, &endstr); // remember sign and keep positive if (UserFloat < 0) { sign = 1; UserFloat *= -1; } else sign = 0; // what format are we using? switch (m_FloatFormat) { case 0 : // Hitech 24bit if (UserFloat == 0.0) { e = -127; Byte1 = 0; Byte2 = 0; Byte3 = 0; Byte4 = 0; mantissa = 1.0; m_Note = "Note: Special Case - Float is zero"; } else { z = log(UserFloat) / log(2.0); e = (int)(z); if ((double)e > z) e --; be = e + 127; x = UserFloat / pow(2.0, (double)e); for (k=0; k>-15; k--) { if (x >= pow(2.0, k)) { mantissa++; // set bit x -= pow(2.0, k); // update remainder } mantissa = mantissa << 1; } // fill byte values if (sign) Byte1 = 0x80; else Byte1 = 0; Byte1 += (be & 0xFE) >> 1; Byte2 = (be & 0x01) << 7; Byte2 += ((int)mantissa & 0x7F00) >> 8; Byte3 = (int)mantissa & 0xFF; Byte4 = 0; m_Mant.Format("%1.12G", ((double)mantissa / pow(2.0, 15))); } break; case 1 : // IEEE754 32Bit if (UserFloat == 0.0) { e = -127; Byte1 = 0; Byte2 = 0; Byte3 = 0; Byte4 = 0; mantissa = 1.0; m_Note = "Note: Special Case - Float is zero"; } else { z = log(UserFloat) / log(2.0); e = (int)(z); if ((double)e > z) e --; be = e + 127; x = UserFloat / pow(2.0, (double)e); for (k=0; k>-23; k--) { if (x >= pow(2.0, k)) { mantissa++; // set bit x -= pow(2.0, k); // update remainder } mantissa = mantissa << 1; } // fill byte values if (sign) Byte1 = 0x80; else Byte1 = 0; Byte1 += (be & 0xFE) >> 1; Byte2 = (be & 0x01) << 7; Byte2 += ((int)mantissa & 0x7F0000) >> 16; Byte3 = ((int)mantissa & 0xFF00) >> 8; Byte4 = (int)mantissa & 0xFF; m_Mant.Format("%1.12G", ((double)mantissa / pow(2.0, 23))); } break; case 2 : // Microchip 32Bit if (UserFloat == 0.0) { e = -127; Byte1 = 0; Byte2 = 0; Byte3 = 0; Byte4 = 0; mantissa = 1.0; m_Note = "Note: Special Case - Float is zero"; } else { z = log(UserFloat) / log(2.0); e = (int)(z); if ((double)e > z) e --; be = e + 127; x = UserFloat / pow(2.0, (double)e); for (k=0; k>-23; k--) { if (x >= pow(2.0, k)) { mantissa++; // set bit x -= pow(2.0, k); // update remainder } mantissa = mantissa << 1; } // fill byte values Byte1 = be; if (sign) Byte2 = 0x80; else Byte2 = 0; Byte2 += ((int)mantissa & 0x7F0000) >> 16; Byte3 = ((int)mantissa & 0xFF00) >> 8; Byte4 = (int)mantissa & 0xFF; m_Mant.Format("%1.12G", ((double)mantissa / pow(2.0, 23))); } break; case 3 : // Microchip 24Bit if (UserFloat == 0.0) { e = -127; Byte1 = 0; Byte2 = 0; Byte3 = 0; Byte4 = 0; mantissa = 1.0; m_Note = "Note: Special Case - Float is zero"; } else { z = log(UserFloat) / log(2.0); e = (int)(z); if ((double)e > z) e --; be = e + 127; x = UserFloat / pow(2.0, (double)e); for (k=0; k>-15; k--) { if (x >= pow(2.0, k)) { mantissa++; // set bit x -= pow(2.0, k); // update remainder } mantissa = mantissa << 1; } // fill byte values Byte1 = be; if (sign) Byte2 = 0x80; else Byte2 = 0; Byte2 += ((int)mantissa & 0x7F00) >> 8; Byte3 = (int)mantissa & 0xFF; Byte4 = 0; m_Mant.Format("%1.12G", ((double)mantissa / pow(2.0, 15))); } break; } m_Byte1Str.Format("%X", Byte1); m_Byte2Str.Format("%X", Byte2); m_Byte3Str.Format("%X", Byte3); m_Byte4Str.Format("%X", Byte4); m_Exp = e; UpdateData(FALSE); } void CFloatconvDlg::OnMaxtextByte1() { // Switch focus to next edit box // CWnd *editboxptr; // editboxptr = GetDlgItem(IDC_FLOAT); LONG WAY // GotoDlgCtrl(editboxptr); NextDlgCtrl(); } void CFloatconvDlg::OnHT24() { UpdateData(TRUE); m_Info.LoadString(IDS_HITECH24); m_Byte4Str = "0"; m_Byte4Control.SetReadOnly(TRUE); UpdateData(FALSE); } void CFloatconvDlg::OnIEEE32() { UpdateData(TRUE); m_Info.LoadString(IDS_IEEE32); m_Byte4Control.SetReadOnly(FALSE); UpdateData(FALSE); } void CFloatconvDlg::OnMCHIP24() { UpdateData(TRUE); m_Info.LoadString(IDS_MCHIP24); m_Byte4Str = "0"; m_Byte4Control.SetReadOnly(TRUE); UpdateData(FALSE); } void CFloatconvDlg::OnMCHIP32() { UpdateData(TRUE); m_Info.LoadString(IDS_MCHIP32); m_Byte4Control.SetReadOnly(FALSE); UpdateData(FALSE); }
file: /Techref/microchip/math/floatconv/floatconvDlg.cpp, 14KB, , updated: 2000/12/16 15:25, local time: 2024/11/10 09:42,
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