kicad/pcb_calculator/electrical_spacing_values.cpp

/*
 * This program source code file is part of KICAD, a free EDA CAD application.
 *
 * Copyright (C) 2011 jean-pierre.charras
 * Copyright (C) 2011 Kicad Developers, see change_log.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#include <wx/app.h>
#include <wx/config.h>

#include <pcb_calculator_frame_base.h>
#include <pcb_calculator.h>
#include <UnitSelector.h>
#include <units_scales.h>

extern double ReturnDoubleFromString( const wxString& TextValue );


#define VALUE_COUNT 7
#define CLASS_COUNT 10

/* These values come from IPC2221
 *  there are 10 voltage classes:
 *  "0 ... 15V" "16 ... 30V" "31 ... 50V" "51 ... 100V"
 *  "101 ... 150V" "151 ... 170V" "171 ... 250V"
 *  "251 ... 300V" "301 ... 500V" " > 500V"
 *  and for each voltage class
 *  there ar e 7 cases:
 *  "B1" "B2" "B3" "B4" "A5" "A6" "A7"
 *  B1 - Internal Conductors
 *  B2 - External Conductors, uncoated, sea level to 3050 m
 *  B3 - External Conductors, uncoated, over 3050 m
 *  B4 - External Conductors, with permanent polymer coating (any elevation)
 *  A5 - External Conductors, with conformal coating over assembly (any elevation)
 *  A6 - External Component lead/termination, uncoated
 *  A7 - External Component lead termination, with conformal coating (any elevation)
 */

/* For voltages greater than 500V, the (per volt) table values
 *  must be added to the 500V values. For example, the elec-
 *  trical spacing for a Type B1 board with 600V is calculated
 *  as:
 *  600V - 500V = 100V
 *  0.25 mm + (100V x 0.0025
 */
static double clist[CLASS_COUNT][VALUE_COUNT] =
{
    { 0.05 * UNIT_MM, 0.1 * UNIT_MM,   0.1 * UNIT_MM,   0.05 * UNIT_MM,  0.13 * UNIT_MM, 0.13 *
      UNIT_MM,
      0.13 * UNIT_MM }, // 0 ... 15V

    { 0.05 * UNIT_MM, 0.1 * UNIT_MM,  0.1 * UNIT_MM,  0.05 * UNIT_MM, 0.13 * UNIT_MM, 0.25 *
      UNIT_MM,
      0.13 * UNIT_MM }, // 16 ... 30V

    { 0.1 * UNIT_MM,  0.6 * UNIT_MM,  0.6 * UNIT_MM,  0.13 * UNIT_MM, 0.13 * UNIT_MM, 0.4 *
      UNIT_MM,
      0.13 * UNIT_MM }, // 31 ... 50V

    { 0.1 * UNIT_MM,  0.6 * UNIT_MM,  1.5 * UNIT_MM,  0.13 * UNIT_MM, 0.13 * UNIT_MM, 0.5 *
      UNIT_MM,
      0.13 * UNIT_MM }, // 51 ... 100V

    { 0.2 * UNIT_MM,  0.6 * UNIT_MM,  3.2 * UNIT_MM,  0.4 * UNIT_MM,  0.4 * UNIT_MM,  0.8 *
      UNIT_MM,
      0.4 * UNIT_MM }, // 101 ... 150V

    { 0.2 * UNIT_MM,  1.25 * UNIT_MM, 3.2 * UNIT_MM,  0.4 * UNIT_MM,  0.4 * UNIT_MM,  0.8 *
      UNIT_MM,
      0.4 * UNIT_MM }, // 151 ... 170V

    { 0.2 * UNIT_MM,  1.25 * UNIT_MM, 6.4 * UNIT_MM,  0.4 * UNIT_MM,  0.4 * UNIT_MM,  0.8 *
      UNIT_MM,
      0.4 * UNIT_MM }, // 171 ... 250V

    { 0.2 * UNIT_MM,  1.25 * UNIT_MM, 12.5 * UNIT_MM, 0.4 * UNIT_MM,  0.4 * UNIT_MM,  0.8 *
      UNIT_MM,
      0.8 * UNIT_MM }, // 251 ... 300V

    { 0.25 * UNIT_MM, 2.5 * UNIT_MM,  12.5 * UNIT_MM, 0.8 * UNIT_MM,  0.8 * UNIT_MM,  1.5 *
      UNIT_MM,
      0.8 * UNIT_MM }, // 301 ... 500V

    // These last values are used to calculate spacing for voltage > 500V
    // there are not the spacing
    { 0.0025 * UNIT_MM, 0.005 * UNIT_MM,  0.025 * UNIT_MM, 0.00305 * UNIT_MM,
        0.00305 * UNIT_MM,  0.00305 * UNIT_MM, 0.00305 * UNIT_MM }, // > 500V
};


void PCB_CALCULATOR_FRAME::OnElectricalSpacingUnitsSelection( wxCommandEvent& event )
{
    ElectricalSpacingUpdateData( m_ElectricalSpacingUnitsSelector->GetUnitScale() );
}

void PCB_CALCULATOR_FRAME::OnElectricalSpacingRefresh( wxCommandEvent& event )
{
    ElectricalSpacingUpdateData( m_ElectricalSpacingUnitsSelector->GetUnitScale() );
}


void PCB_CALCULATOR_FRAME::ElectricalSpacingUpdateData( double aUnitScale )
{
    wxString txt;
    double voltage = 500.0;     // to calculate values at V > 500V
    txt = m_ElectricalSpacingVoltage->GetValue();
    if( ! txt.IsEmpty() )
        voltage = ReturnDoubleFromString(txt);
    if( voltage < 500.0 )
        voltage = 500.0;
    txt.Printf( wxT( "%g" ), voltage );
    m_ElectricalSpacingVoltage->SetValue( txt );

    for( int ii = 0; ii < CLASS_COUNT-1; ii++ )
    {
        for( int jj = 0; jj < VALUE_COUNT; jj++ )
        {
            txt.Printf( wxT( "%g" ), clist[ii][jj] / aUnitScale );
            m_gridElectricalSpacingValues->SetCellValue( ii, jj, txt );
        }
    }

    for( int jj = 0; jj < VALUE_COUNT; jj++ )
    {
        double spacing = clist[CLASS_COUNT-2][jj];
        double spacing_extra = clist[CLASS_COUNT-1][jj];
        spacing += spacing_extra * ( voltage - 500.0 );
        txt.Printf( wxT( "%g" ), spacing / aUnitScale );
        m_gridElectricalSpacingValues->SetCellValue( CLASS_COUNT-1, jj, txt );
    }
}