/*
* This program source code file is part of KICAD, a free EDA CAD application.
*
* Copyright (C) 2011 jean-pierre.charras
* Copyright (C) 1992-2021 Kicad Developers, see AUTHORS.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 3
* 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, see .
*/
/* see
* http://www.desmith.net/NMdS/Electronics/TraceWidth.html
* http://www.ultracad.com/articles/pcbtemp.pdf
* for more info
*/
#include
#include "pcb_calculator_settings.h"
#include
#include
#include "units_scales.h"
extern double DoubleFromString( const wxString& TextValue );
// The IPC2221 formula used to calculate track width is valid only for copper material
const double copper_resistivity = 1.72e-8;
#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
};
PANEL_ELECTRICAL_SPACING::PANEL_ELECTRICAL_SPACING( wxWindow* parent, wxWindowID id,
const wxPoint& pos, const wxSize& size,
long style, const wxString& name ) :
PANEL_ELECTRICAL_SPACING_BASE( parent, id, pos, size, style, name )
{
// Autosize the row label column to be sure label are not truncated
m_gridElectricalSpacingValues->SetRowLabelSize( wxGRID_AUTOSIZE );
}
PANEL_ELECTRICAL_SPACING::~PANEL_ELECTRICAL_SPACING()
{
}
void PANEL_ELECTRICAL_SPACING::SaveSettings( PCB_CALCULATOR_SETTINGS* aCfg )
{
aCfg->m_Electrical.spacing_units = m_ElectricalSpacingUnitsSelector->GetSelection();
aCfg->m_Electrical.spacing_voltage = m_ElectricalSpacingVoltage->GetValue();
}
void PANEL_ELECTRICAL_SPACING::LoadSettings( PCB_CALCULATOR_SETTINGS* aCfg )
{
m_ElectricalSpacingUnitsSelector->SetSelection( aCfg->m_Electrical.spacing_units );
m_ElectricalSpacingVoltage->SetValue( aCfg->m_Electrical.spacing_voltage );
ElectricalSpacingUpdateData( m_ElectricalSpacingUnitsSelector->GetUnitScale() );
}
void PANEL_ELECTRICAL_SPACING::OnElectricalSpacingUnitsSelection( wxCommandEvent& event )
{
ElectricalSpacingUpdateData( m_ElectricalSpacingUnitsSelector->GetUnitScale() );
}
void PANEL_ELECTRICAL_SPACING::OnElectricalSpacingRefresh( wxCommandEvent& event )
{
ElectricalSpacingUpdateData( m_ElectricalSpacingUnitsSelector->GetUnitScale() );
}
void PANEL_ELECTRICAL_SPACING::ElectricalSpacingUpdateData( double aUnitScale )
{
wxString txt;
double voltage = 500.0; // to calculate values at V > 500V
txt = m_ElectricalSpacingVoltage->GetValue();
if( ! txt.IsEmpty() )
voltage = DoubleFromString(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 );
}
m_gridElectricalSpacingValues->SetRowLabelSize( wxGRID_AUTOSIZE );
}